ref: 4f9760e752cb2bf07ea6f934e3a28200edbaba4a
dir: /src/truetype/ttinterp.c/
/***************************************************************************/
/* */
/* ttinterp.c */
/* */
/* TrueType bytecode interpreter (body). */
/* */
/* Copyright 1996-2013 */
/* by David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
/* Greg Hitchcock from Microsoft has helped a lot in resolving unclear */
/* issues; many thanks! */
#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_CALC_H
#include FT_TRIGONOMETRY_H
#include FT_SYSTEM_H
#include FT_TRUETYPE_DRIVER_H
#include "ttinterp.h"
#include "tterrors.h"
#include "ttsubpix.h"
#ifdef TT_USE_BYTECODE_INTERPRETER
/*************************************************************************/
/* */
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
/* messages during execution. */
/* */
#undef FT_COMPONENT
#define FT_COMPONENT trace_ttinterp
/*************************************************************************/
/* */
/* In order to detect infinite loops in the code, we set up a counter */
/* within the run loop. A single stroke of interpretation is now */
/* limited to a maximum number of opcodes defined below. */
/* */
#define MAX_RUNNABLE_OPCODES 1000000L
/*************************************************************************/
/* */
/* There are two kinds of implementations: */
/* */
/* a. static implementation */
/* */
/* The current execution context is a static variable, which fields */
/* are accessed directly by the interpreter during execution. The */
/* context is named `cur'. */
/* */
/* This version is non-reentrant, of course. */
/* */
/* b. indirect implementation */
/* */
/* The current execution context is passed to _each_ function as its */
/* first argument, and each field is thus accessed indirectly. */
/* */
/* This version is fully re-entrant. */
/* */
/* The idea is that an indirect implementation may be slower to execute */
/* on low-end processors that are used in some systems (like 386s or */
/* even 486s). */
/* */
/* As a consequence, the indirect implementation is now the default, as */
/* its performance costs can be considered negligible in our context. */
/* Note, however, that we kept the same source with macros because: */
/* */
/* - The code is kept very close in design to the Pascal code used for */
/* development. */
/* */
/* - It's much more readable that way! */
/* */
/* - It's still open to experimentation and tuning. */
/* */
/*************************************************************************/
#ifndef TT_CONFIG_OPTION_STATIC_INTERPRETER /* indirect implementation */
#define CUR (*exc) /* see ttobjs.h */
/*************************************************************************/
/* */
/* This macro is used whenever `exec' is unused in a function, to avoid */
/* stupid warnings from pedantic compilers. */
/* */
#define FT_UNUSED_EXEC FT_UNUSED( exc )
#else /* static implementation */
#define CUR cur
#define FT_UNUSED_EXEC int __dummy = __dummy
static
TT_ExecContextRec cur; /* static exec. context variable */
/* apparently, we have a _lot_ of direct indexing when accessing */
/* the static `cur', which makes the code bigger (due to all the */
/* four bytes addresses). */
#endif /* TT_CONFIG_OPTION_STATIC_INTERPRETER */
/*************************************************************************/
/* */
/* The instruction argument stack. */
/* */
#define INS_ARG EXEC_OP_ FT_Long* args /* see ttobjs.h for EXEC_OP_ */
/*************************************************************************/
/* */
/* This macro is used whenever `args' is unused in a function, to avoid */
/* stupid warnings from pedantic compilers. */
/* */
#define FT_UNUSED_ARG FT_UNUSED_EXEC; FT_UNUSED( args )
#define SUBPIXEL_HINTING \
( ((TT_Driver)FT_FACE_DRIVER( CUR.face ))->interpreter_version == \
TT_INTERPRETER_VERSION_38 )
/*************************************************************************/
/* */
/* The following macros hide the use of EXEC_ARG and EXEC_ARG_ to */
/* increase readability of the code. */
/* */
/*************************************************************************/
#define SKIP_Code() \
SkipCode( EXEC_ARG )
#define GET_ShortIns() \
GetShortIns( EXEC_ARG )
#define NORMalize( x, y, v ) \
Normalize( EXEC_ARG_ x, y, v )
#define SET_SuperRound( scale, flags ) \
SetSuperRound( EXEC_ARG_ scale, flags )
#define ROUND_None( d, c ) \
Round_None( EXEC_ARG_ d, c )
#define INS_Goto_CodeRange( range, ip ) \
Ins_Goto_CodeRange( EXEC_ARG_ range, ip )
#define CUR_Func_move( z, p, d ) \
CUR.func_move( EXEC_ARG_ z, p, d )
#define CUR_Func_move_orig( z, p, d ) \
CUR.func_move_orig( EXEC_ARG_ z, p, d )
#define CUR_Func_round( d, c ) \
CUR.func_round( EXEC_ARG_ d, c )
#define CUR_Func_read_cvt( index ) \
CUR.func_read_cvt( EXEC_ARG_ index )
#define CUR_Func_write_cvt( index, val ) \
CUR.func_write_cvt( EXEC_ARG_ index, val )
#define CUR_Func_move_cvt( index, val ) \
CUR.func_move_cvt( EXEC_ARG_ index, val )
#define CURRENT_Ratio() \
Current_Ratio( EXEC_ARG )
#define CURRENT_Ppem() \
Current_Ppem( EXEC_ARG )
#define CUR_Ppem() \
Cur_PPEM( EXEC_ARG )
#define INS_SxVTL( a, b, c, d ) \
Ins_SxVTL( EXEC_ARG_ a, b, c, d )
#define COMPUTE_Funcs() \
Compute_Funcs( EXEC_ARG )
#define COMPUTE_Round( a ) \
Compute_Round( EXEC_ARG_ a )
#define COMPUTE_Point_Displacement( a, b, c, d ) \
Compute_Point_Displacement( EXEC_ARG_ a, b, c, d )
#define MOVE_Zp2_Point( a, b, c, t ) \
Move_Zp2_Point( EXEC_ARG_ a, b, c, t )
#define CUR_Func_project( v1, v2 ) \
CUR.func_project( EXEC_ARG_ (v1)->x - (v2)->x, (v1)->y - (v2)->y )
#define CUR_Func_dualproj( v1, v2 ) \
CUR.func_dualproj( EXEC_ARG_ (v1)->x - (v2)->x, (v1)->y - (v2)->y )
#define CUR_fast_project( v ) \
CUR.func_project( EXEC_ARG_ (v)->x, (v)->y )
#define CUR_fast_dualproj( v ) \
CUR.func_dualproj( EXEC_ARG_ (v)->x, (v)->y )
/*************************************************************************/
/* */
/* Instruction dispatch function, as used by the interpreter. */
/* */
typedef void (*TInstruction_Function)( INS_ARG );
/*************************************************************************/
/* */
/* Two simple bounds-checking macros. */
/* */
#define BOUNDS( x, n ) ( (FT_UInt)(x) >= (FT_UInt)(n) )
#define BOUNDSL( x, n ) ( (FT_ULong)(x) >= (FT_ULong)(n) )
/*************************************************************************/
/* */
/* This macro computes (a*2^14)/b and complements TT_MulFix14. */
/* */
#define TT_DivFix14( a, b ) \
FT_DivFix( a, (b) << 2 )
#undef SUCCESS
#define SUCCESS 0
#undef FAILURE
#define FAILURE 1
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
#define GUESS_VECTOR( V ) \
if ( CUR.face->unpatented_hinting ) \
{ \
CUR.GS.V.x = (FT_F2Dot14)( CUR.GS.both_x_axis ? 0x4000 : 0 ); \
CUR.GS.V.y = (FT_F2Dot14)( CUR.GS.both_x_axis ? 0 : 0x4000 ); \
}
#else
#define GUESS_VECTOR( V )
#endif
/*************************************************************************/
/* */
/* CODERANGE FUNCTIONS */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* TT_Goto_CodeRange */
/* */
/* <Description> */
/* Switches to a new code range (updates the code related elements in */
/* `exec', and `IP'). */
/* */
/* <Input> */
/* range :: The new execution code range. */
/* */
/* IP :: The new IP in the new code range. */
/* */
/* <InOut> */
/* exec :: The target execution context. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
TT_Goto_CodeRange( TT_ExecContext exec,
FT_Int range,
FT_Long IP )
{
TT_CodeRange* coderange;
FT_ASSERT( range >= 1 && range <= 3 );
coderange = &exec->codeRangeTable[range - 1];
FT_ASSERT( coderange->base != NULL );
/* NOTE: Because the last instruction of a program may be a CALL */
/* which will return to the first byte *after* the code */
/* range, we test for IP <= Size instead of IP < Size. */
/* */
FT_ASSERT( (FT_ULong)IP <= coderange->size );
exec->code = coderange->base;
exec->codeSize = coderange->size;
exec->IP = IP;
exec->curRange = range;
return FT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* TT_Set_CodeRange */
/* */
/* <Description> */
/* Sets a code range. */
/* */
/* <Input> */
/* range :: The code range index. */
/* */
/* base :: The new code base. */
/* */
/* length :: The range size in bytes. */
/* */
/* <InOut> */
/* exec :: The target execution context. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
TT_Set_CodeRange( TT_ExecContext exec,
FT_Int range,
void* base,
FT_Long length )
{
FT_ASSERT( range >= 1 && range <= 3 );
exec->codeRangeTable[range - 1].base = (FT_Byte*)base;
exec->codeRangeTable[range - 1].size = length;
return FT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* TT_Clear_CodeRange */
/* */
/* <Description> */
/* Clears a code range. */
/* */
/* <Input> */
/* range :: The code range index. */
/* */
/* <InOut> */
/* exec :: The target execution context. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* Does not set the Error variable. */
/* */
FT_LOCAL_DEF( FT_Error )
TT_Clear_CodeRange( TT_ExecContext exec,
FT_Int range )
{
FT_ASSERT( range >= 1 && range <= 3 );
exec->codeRangeTable[range - 1].base = NULL;
exec->codeRangeTable[range - 1].size = 0;
return FT_Err_Ok;
}
/*************************************************************************/
/* */
/* EXECUTION CONTEXT ROUTINES */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* TT_Done_Context */
/* */
/* <Description> */
/* Destroys a given context. */
/* */
/* <Input> */
/* exec :: A handle to the target execution context. */
/* */
/* memory :: A handle to the parent memory object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* Only the glyph loader and debugger should call this function. */
/* */
FT_LOCAL_DEF( FT_Error )
TT_Done_Context( TT_ExecContext exec )
{
FT_Memory memory = exec->memory;
/* points zone */
exec->maxPoints = 0;
exec->maxContours = 0;
/* free stack */
FT_FREE( exec->stack );
exec->stackSize = 0;
/* free call stack */
FT_FREE( exec->callStack );
exec->callSize = 0;
exec->callTop = 0;
/* free glyph code range */
FT_FREE( exec->glyphIns );
exec->glyphSize = 0;
exec->size = NULL;
exec->face = NULL;
FT_FREE( exec );
return FT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* Init_Context */
/* */
/* <Description> */
/* Initializes a context object. */
/* */
/* <Input> */
/* memory :: A handle to the parent memory object. */
/* */
/* <InOut> */
/* exec :: A handle to the target execution context. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
static FT_Error
Init_Context( TT_ExecContext exec,
FT_Memory memory )
{
FT_Error error;
FT_TRACE1(( "Init_Context: new object at 0x%08p\n", exec ));
exec->memory = memory;
exec->callSize = 32;
if ( FT_NEW_ARRAY( exec->callStack, exec->callSize ) )
goto Fail_Memory;
/* all values in the context are set to 0 already, but this is */
/* here as a remainder */
exec->maxPoints = 0;
exec->maxContours = 0;
exec->stackSize = 0;
exec->glyphSize = 0;
exec->stack = NULL;
exec->glyphIns = NULL;
exec->face = NULL;
exec->size = NULL;
return FT_Err_Ok;
Fail_Memory:
FT_ERROR(( "Init_Context: not enough memory for %p\n", exec ));
TT_Done_Context( exec );
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* Update_Max */
/* */
/* <Description> */
/* Checks the size of a buffer and reallocates it if necessary. */
/* */
/* <Input> */
/* memory :: A handle to the parent memory object. */
/* */
/* multiplier :: The size in bytes of each element in the buffer. */
/* */
/* new_max :: The new capacity (size) of the buffer. */
/* */
/* <InOut> */
/* size :: The address of the buffer's current size expressed */
/* in elements. */
/* */
/* buff :: The address of the buffer base pointer. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
Update_Max( FT_Memory memory,
FT_ULong* size,
FT_Long multiplier,
void* _pbuff,
FT_ULong new_max )
{
FT_Error error;
void** pbuff = (void**)_pbuff;
if ( *size < new_max )
{
if ( FT_REALLOC( *pbuff, *size * multiplier, new_max * multiplier ) )
return error;
*size = new_max;
}
return FT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* TT_Load_Context */
/* */
/* <Description> */
/* Prepare an execution context for glyph hinting. */
/* */
/* <Input> */
/* face :: A handle to the source face object. */
/* */
/* size :: A handle to the source size object. */
/* */
/* <InOut> */
/* exec :: A handle to the target execution context. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* Only the glyph loader and debugger should call this function. */
/* */
FT_LOCAL_DEF( FT_Error )
TT_Load_Context( TT_ExecContext exec,
TT_Face face,
TT_Size size )
{
FT_Int i;
FT_ULong tmp;
TT_MaxProfile* maxp;
FT_Error error;
exec->face = face;
maxp = &face->max_profile;
exec->size = size;
if ( size )
{
exec->numFDefs = size->num_function_defs;
exec->maxFDefs = size->max_function_defs;
exec->numIDefs = size->num_instruction_defs;
exec->maxIDefs = size->max_instruction_defs;
exec->FDefs = size->function_defs;
exec->IDefs = size->instruction_defs;
exec->tt_metrics = size->ttmetrics;
exec->metrics = size->metrics;
exec->maxFunc = size->max_func;
exec->maxIns = size->max_ins;
for ( i = 0; i < TT_MAX_CODE_RANGES; i++ )
exec->codeRangeTable[i] = size->codeRangeTable[i];
/* set graphics state */
exec->GS = size->GS;
exec->cvtSize = size->cvt_size;
exec->cvt = size->cvt;
exec->storeSize = size->storage_size;
exec->storage = size->storage;
exec->twilight = size->twilight;
/* In case of multi-threading it can happen that the old size object */
/* no longer exists, thus we must clear all glyph zone references. */
ft_memset( &exec->zp0, 0, sizeof ( exec->zp0 ) );
exec->zp1 = exec->zp0;
exec->zp2 = exec->zp0;
}
/* XXX: We reserve a little more elements on the stack to deal safely */
/* with broken fonts like arialbs, courbs, timesbs, etc. */
tmp = exec->stackSize;
error = Update_Max( exec->memory,
&tmp,
sizeof ( FT_F26Dot6 ),
(void*)&exec->stack,
maxp->maxStackElements + 32 );
exec->stackSize = (FT_UInt)tmp;
if ( error )
return error;
tmp = exec->glyphSize;
error = Update_Max( exec->memory,
&tmp,
sizeof ( FT_Byte ),
(void*)&exec->glyphIns,
maxp->maxSizeOfInstructions );
exec->glyphSize = (FT_UShort)tmp;
if ( error )
return error;
exec->pts.n_points = 0;
exec->pts.n_contours = 0;
exec->zp1 = exec->pts;
exec->zp2 = exec->pts;
exec->zp0 = exec->pts;
exec->instruction_trap = FALSE;
return FT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* TT_Save_Context */
/* */
/* <Description> */
/* Saves the code ranges in a `size' object. */
/* */
/* <Input> */
/* exec :: A handle to the source execution context. */
/* */
/* <InOut> */
/* size :: A handle to the target size object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* Only the glyph loader and debugger should call this function. */
/* */
FT_LOCAL_DEF( FT_Error )
TT_Save_Context( TT_ExecContext exec,
TT_Size size )
{
FT_Int i;
/* XXX: Will probably disappear soon with all the code range */
/* management, which is now rather obsolete. */
/* */
size->num_function_defs = exec->numFDefs;
size->num_instruction_defs = exec->numIDefs;
size->max_func = exec->maxFunc;
size->max_ins = exec->maxIns;
for ( i = 0; i < TT_MAX_CODE_RANGES; i++ )
size->codeRangeTable[i] = exec->codeRangeTable[i];
return FT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* TT_Run_Context */
/* */
/* <Description> */
/* Executes one or more instructions in the execution context. */
/* */
/* <Input> */
/* debug :: A Boolean flag. If set, the function sets some internal */
/* variables and returns immediately, otherwise TT_RunIns() */
/* is called. */
/* */
/* This is commented out currently. */
/* */
/* <Input> */
/* exec :: A handle to the target execution context. */
/* */
/* <Return> */
/* TrueType error code. 0 means success. */
/* */
/* <Note> */
/* Only the glyph loader and debugger should call this function. */
/* */
FT_LOCAL_DEF( FT_Error )
TT_Run_Context( TT_ExecContext exec,
FT_Bool debug )
{
FT_Error error;
if ( ( error = TT_Goto_CodeRange( exec, tt_coderange_glyph, 0 ) )
!= FT_Err_Ok )
return error;
exec->zp0 = exec->pts;
exec->zp1 = exec->pts;
exec->zp2 = exec->pts;
exec->GS.gep0 = 1;
exec->GS.gep1 = 1;
exec->GS.gep2 = 1;
exec->GS.projVector.x = 0x4000;
exec->GS.projVector.y = 0x0000;
exec->GS.freeVector = exec->GS.projVector;
exec->GS.dualVector = exec->GS.projVector;
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
exec->GS.both_x_axis = TRUE;
#endif
exec->GS.round_state = 1;
exec->GS.loop = 1;
/* some glyphs leave something on the stack. so we clean it */
/* before a new execution. */
exec->top = 0;
exec->callTop = 0;
#if 1
FT_UNUSED( debug );
return exec->face->interpreter( exec );
#else
if ( !debug )
return TT_RunIns( exec );
else
return FT_Err_Ok;
#endif
}
/* The default value for `scan_control' is documented as FALSE in the */
/* TrueType specification. This is confusing since it implies a */
/* Boolean value. However, this is not the case, thus both the */
/* default values of our `scan_type' and `scan_control' fields (which */
/* the documentation's `scan_control' variable is split into) are */
/* zero. */
const TT_GraphicsState tt_default_graphics_state =
{
0, 0, 0,
{ 0x4000, 0 },
{ 0x4000, 0 },
{ 0x4000, 0 },
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
TRUE,
#endif
1, 64, 1,
TRUE, 68, 0, 0, 9, 3,
0, FALSE, 0, 1, 1, 1
};
/* documentation is in ttinterp.h */
FT_EXPORT_DEF( TT_ExecContext )
TT_New_Context( TT_Driver driver )
{
TT_ExecContext exec;
FT_Memory memory;
memory = driver->root.root.memory;
exec = driver->context;
if ( !driver->context )
{
FT_Error error;
/* allocate object */
if ( FT_NEW( exec ) )
goto Fail;
/* initialize it; in case of error this deallocates `exec' too */
error = Init_Context( exec, memory );
if ( error )
goto Fail;
/* store it into the driver */
driver->context = exec;
}
return driver->context;
Fail:
return NULL;
}
/*************************************************************************/
/* */
/* Before an opcode is executed, the interpreter verifies that there are */
/* enough arguments on the stack, with the help of the `Pop_Push_Count' */
/* table. */
/* */
/* For each opcode, the first column gives the number of arguments that */
/* are popped from the stack; the second one gives the number of those */
/* that are pushed in result. */
/* */
/* Opcodes which have a varying number of parameters in the data stream */
/* (NPUSHB, NPUSHW) are handled specially; they have a negative value in */
/* the `opcode_length' table, and the value in `Pop_Push_Count' is set */
/* to zero. */
/* */
/*************************************************************************/
#undef PACK
#define PACK( x, y ) ( ( x << 4 ) | y )
static
const FT_Byte Pop_Push_Count[256] =
{
/* opcodes are gathered in groups of 16 */
/* please keep the spaces as they are */
/* SVTCA y */ PACK( 0, 0 ),
/* SVTCA x */ PACK( 0, 0 ),
/* SPvTCA y */ PACK( 0, 0 ),
/* SPvTCA x */ PACK( 0, 0 ),
/* SFvTCA y */ PACK( 0, 0 ),
/* SFvTCA x */ PACK( 0, 0 ),
/* SPvTL // */ PACK( 2, 0 ),
/* SPvTL + */ PACK( 2, 0 ),
/* SFvTL // */ PACK( 2, 0 ),
/* SFvTL + */ PACK( 2, 0 ),
/* SPvFS */ PACK( 2, 0 ),
/* SFvFS */ PACK( 2, 0 ),
/* GPV */ PACK( 0, 2 ),
/* GFV */ PACK( 0, 2 ),
/* SFvTPv */ PACK( 0, 0 ),
/* ISECT */ PACK( 5, 0 ),
/* SRP0 */ PACK( 1, 0 ),
/* SRP1 */ PACK( 1, 0 ),
/* SRP2 */ PACK( 1, 0 ),
/* SZP0 */ PACK( 1, 0 ),
/* SZP1 */ PACK( 1, 0 ),
/* SZP2 */ PACK( 1, 0 ),
/* SZPS */ PACK( 1, 0 ),
/* SLOOP */ PACK( 1, 0 ),
/* RTG */ PACK( 0, 0 ),
/* RTHG */ PACK( 0, 0 ),
/* SMD */ PACK( 1, 0 ),
/* ELSE */ PACK( 0, 0 ),
/* JMPR */ PACK( 1, 0 ),
/* SCvTCi */ PACK( 1, 0 ),
/* SSwCi */ PACK( 1, 0 ),
/* SSW */ PACK( 1, 0 ),
/* DUP */ PACK( 1, 2 ),
/* POP */ PACK( 1, 0 ),
/* CLEAR */ PACK( 0, 0 ),
/* SWAP */ PACK( 2, 2 ),
/* DEPTH */ PACK( 0, 1 ),
/* CINDEX */ PACK( 1, 1 ),
/* MINDEX */ PACK( 1, 0 ),
/* AlignPTS */ PACK( 2, 0 ),
/* INS_$28 */ PACK( 0, 0 ),
/* UTP */ PACK( 1, 0 ),
/* LOOPCALL */ PACK( 2, 0 ),
/* CALL */ PACK( 1, 0 ),
/* FDEF */ PACK( 1, 0 ),
/* ENDF */ PACK( 0, 0 ),
/* MDAP[0] */ PACK( 1, 0 ),
/* MDAP[1] */ PACK( 1, 0 ),
/* IUP[0] */ PACK( 0, 0 ),
/* IUP[1] */ PACK( 0, 0 ),
/* SHP[0] */ PACK( 0, 0 ),
/* SHP[1] */ PACK( 0, 0 ),
/* SHC[0] */ PACK( 1, 0 ),
/* SHC[1] */ PACK( 1, 0 ),
/* SHZ[0] */ PACK( 1, 0 ),
/* SHZ[1] */ PACK( 1, 0 ),
/* SHPIX */ PACK( 1, 0 ),
/* IP */ PACK( 0, 0 ),
/* MSIRP[0] */ PACK( 2, 0 ),
/* MSIRP[1] */ PACK( 2, 0 ),
/* AlignRP */ PACK( 0, 0 ),
/* RTDG */ PACK( 0, 0 ),
/* MIAP[0] */ PACK( 2, 0 ),
/* MIAP[1] */ PACK( 2, 0 ),
/* NPushB */ PACK( 0, 0 ),
/* NPushW */ PACK( 0, 0 ),
/* WS */ PACK( 2, 0 ),
/* RS */ PACK( 1, 1 ),
/* WCvtP */ PACK( 2, 0 ),
/* RCvt */ PACK( 1, 1 ),
/* GC[0] */ PACK( 1, 1 ),
/* GC[1] */ PACK( 1, 1 ),
/* SCFS */ PACK( 2, 0 ),
/* MD[0] */ PACK( 2, 1 ),
/* MD[1] */ PACK( 2, 1 ),
/* MPPEM */ PACK( 0, 1 ),
/* MPS */ PACK( 0, 1 ),
/* FlipON */ PACK( 0, 0 ),
/* FlipOFF */ PACK( 0, 0 ),
/* DEBUG */ PACK( 1, 0 ),
/* LT */ PACK( 2, 1 ),
/* LTEQ */ PACK( 2, 1 ),
/* GT */ PACK( 2, 1 ),
/* GTEQ */ PACK( 2, 1 ),
/* EQ */ PACK( 2, 1 ),
/* NEQ */ PACK( 2, 1 ),
/* ODD */ PACK( 1, 1 ),
/* EVEN */ PACK( 1, 1 ),
/* IF */ PACK( 1, 0 ),
/* EIF */ PACK( 0, 0 ),
/* AND */ PACK( 2, 1 ),
/* OR */ PACK( 2, 1 ),
/* NOT */ PACK( 1, 1 ),
/* DeltaP1 */ PACK( 1, 0 ),
/* SDB */ PACK( 1, 0 ),
/* SDS */ PACK( 1, 0 ),
/* ADD */ PACK( 2, 1 ),
/* SUB */ PACK( 2, 1 ),
/* DIV */ PACK( 2, 1 ),
/* MUL */ PACK( 2, 1 ),
/* ABS */ PACK( 1, 1 ),
/* NEG */ PACK( 1, 1 ),
/* FLOOR */ PACK( 1, 1 ),
/* CEILING */ PACK( 1, 1 ),
/* ROUND[0] */ PACK( 1, 1 ),
/* ROUND[1] */ PACK( 1, 1 ),
/* ROUND[2] */ PACK( 1, 1 ),
/* ROUND[3] */ PACK( 1, 1 ),
/* NROUND[0] */ PACK( 1, 1 ),
/* NROUND[1] */ PACK( 1, 1 ),
/* NROUND[2] */ PACK( 1, 1 ),
/* NROUND[3] */ PACK( 1, 1 ),
/* WCvtF */ PACK( 2, 0 ),
/* DeltaP2 */ PACK( 1, 0 ),
/* DeltaP3 */ PACK( 1, 0 ),
/* DeltaCn[0] */ PACK( 1, 0 ),
/* DeltaCn[1] */ PACK( 1, 0 ),
/* DeltaCn[2] */ PACK( 1, 0 ),
/* SROUND */ PACK( 1, 0 ),
/* S45Round */ PACK( 1, 0 ),
/* JROT */ PACK( 2, 0 ),
/* JROF */ PACK( 2, 0 ),
/* ROFF */ PACK( 0, 0 ),
/* INS_$7B */ PACK( 0, 0 ),
/* RUTG */ PACK( 0, 0 ),
/* RDTG */ PACK( 0, 0 ),
/* SANGW */ PACK( 1, 0 ),
/* AA */ PACK( 1, 0 ),
/* FlipPT */ PACK( 0, 0 ),
/* FlipRgON */ PACK( 2, 0 ),
/* FlipRgOFF */ PACK( 2, 0 ),
/* INS_$83 */ PACK( 0, 0 ),
/* INS_$84 */ PACK( 0, 0 ),
/* ScanCTRL */ PACK( 1, 0 ),
/* SDPVTL[0] */ PACK( 2, 0 ),
/* SDPVTL[1] */ PACK( 2, 0 ),
/* GetINFO */ PACK( 1, 1 ),
/* IDEF */ PACK( 1, 0 ),
/* ROLL */ PACK( 3, 3 ),
/* MAX */ PACK( 2, 1 ),
/* MIN */ PACK( 2, 1 ),
/* ScanTYPE */ PACK( 1, 0 ),
/* InstCTRL */ PACK( 2, 0 ),
/* INS_$8F */ PACK( 0, 0 ),
/* INS_$90 */ PACK( 0, 0 ),
/* INS_$91 */ PACK( 0, 0 ),
/* INS_$92 */ PACK( 0, 0 ),
/* INS_$93 */ PACK( 0, 0 ),
/* INS_$94 */ PACK( 0, 0 ),
/* INS_$95 */ PACK( 0, 0 ),
/* INS_$96 */ PACK( 0, 0 ),
/* INS_$97 */ PACK( 0, 0 ),
/* INS_$98 */ PACK( 0, 0 ),
/* INS_$99 */ PACK( 0, 0 ),
/* INS_$9A */ PACK( 0, 0 ),
/* INS_$9B */ PACK( 0, 0 ),
/* INS_$9C */ PACK( 0, 0 ),
/* INS_$9D */ PACK( 0, 0 ),
/* INS_$9E */ PACK( 0, 0 ),
/* INS_$9F */ PACK( 0, 0 ),
/* INS_$A0 */ PACK( 0, 0 ),
/* INS_$A1 */ PACK( 0, 0 ),
/* INS_$A2 */ PACK( 0, 0 ),
/* INS_$A3 */ PACK( 0, 0 ),
/* INS_$A4 */ PACK( 0, 0 ),
/* INS_$A5 */ PACK( 0, 0 ),
/* INS_$A6 */ PACK( 0, 0 ),
/* INS_$A7 */ PACK( 0, 0 ),
/* INS_$A8 */ PACK( 0, 0 ),
/* INS_$A9 */ PACK( 0, 0 ),
/* INS_$AA */ PACK( 0, 0 ),
/* INS_$AB */ PACK( 0, 0 ),
/* INS_$AC */ PACK( 0, 0 ),
/* INS_$AD */ PACK( 0, 0 ),
/* INS_$AE */ PACK( 0, 0 ),
/* INS_$AF */ PACK( 0, 0 ),
/* PushB[0] */ PACK( 0, 1 ),
/* PushB[1] */ PACK( 0, 2 ),
/* PushB[2] */ PACK( 0, 3 ),
/* PushB[3] */ PACK( 0, 4 ),
/* PushB[4] */ PACK( 0, 5 ),
/* PushB[5] */ PACK( 0, 6 ),
/* PushB[6] */ PACK( 0, 7 ),
/* PushB[7] */ PACK( 0, 8 ),
/* PushW[0] */ PACK( 0, 1 ),
/* PushW[1] */ PACK( 0, 2 ),
/* PushW[2] */ PACK( 0, 3 ),
/* PushW[3] */ PACK( 0, 4 ),
/* PushW[4] */ PACK( 0, 5 ),
/* PushW[5] */ PACK( 0, 6 ),
/* PushW[6] */ PACK( 0, 7 ),
/* PushW[7] */ PACK( 0, 8 ),
/* MDRP[00] */ PACK( 1, 0 ),
/* MDRP[01] */ PACK( 1, 0 ),
/* MDRP[02] */ PACK( 1, 0 ),
/* MDRP[03] */ PACK( 1, 0 ),
/* MDRP[04] */ PACK( 1, 0 ),
/* MDRP[05] */ PACK( 1, 0 ),
/* MDRP[06] */ PACK( 1, 0 ),
/* MDRP[07] */ PACK( 1, 0 ),
/* MDRP[08] */ PACK( 1, 0 ),
/* MDRP[09] */ PACK( 1, 0 ),
/* MDRP[10] */ PACK( 1, 0 ),
/* MDRP[11] */ PACK( 1, 0 ),
/* MDRP[12] */ PACK( 1, 0 ),
/* MDRP[13] */ PACK( 1, 0 ),
/* MDRP[14] */ PACK( 1, 0 ),
/* MDRP[15] */ PACK( 1, 0 ),
/* MDRP[16] */ PACK( 1, 0 ),
/* MDRP[17] */ PACK( 1, 0 ),
/* MDRP[18] */ PACK( 1, 0 ),
/* MDRP[19] */ PACK( 1, 0 ),
/* MDRP[20] */ PACK( 1, 0 ),
/* MDRP[21] */ PACK( 1, 0 ),
/* MDRP[22] */ PACK( 1, 0 ),
/* MDRP[23] */ PACK( 1, 0 ),
/* MDRP[24] */ PACK( 1, 0 ),
/* MDRP[25] */ PACK( 1, 0 ),
/* MDRP[26] */ PACK( 1, 0 ),
/* MDRP[27] */ PACK( 1, 0 ),
/* MDRP[28] */ PACK( 1, 0 ),
/* MDRP[29] */ PACK( 1, 0 ),
/* MDRP[30] */ PACK( 1, 0 ),
/* MDRP[31] */ PACK( 1, 0 ),
/* MIRP[00] */ PACK( 2, 0 ),
/* MIRP[01] */ PACK( 2, 0 ),
/* MIRP[02] */ PACK( 2, 0 ),
/* MIRP[03] */ PACK( 2, 0 ),
/* MIRP[04] */ PACK( 2, 0 ),
/* MIRP[05] */ PACK( 2, 0 ),
/* MIRP[06] */ PACK( 2, 0 ),
/* MIRP[07] */ PACK( 2, 0 ),
/* MIRP[08] */ PACK( 2, 0 ),
/* MIRP[09] */ PACK( 2, 0 ),
/* MIRP[10] */ PACK( 2, 0 ),
/* MIRP[11] */ PACK( 2, 0 ),
/* MIRP[12] */ PACK( 2, 0 ),
/* MIRP[13] */ PACK( 2, 0 ),
/* MIRP[14] */ PACK( 2, 0 ),
/* MIRP[15] */ PACK( 2, 0 ),
/* MIRP[16] */ PACK( 2, 0 ),
/* MIRP[17] */ PACK( 2, 0 ),
/* MIRP[18] */ PACK( 2, 0 ),
/* MIRP[19] */ PACK( 2, 0 ),
/* MIRP[20] */ PACK( 2, 0 ),
/* MIRP[21] */ PACK( 2, 0 ),
/* MIRP[22] */ PACK( 2, 0 ),
/* MIRP[23] */ PACK( 2, 0 ),
/* MIRP[24] */ PACK( 2, 0 ),
/* MIRP[25] */ PACK( 2, 0 ),
/* MIRP[26] */ PACK( 2, 0 ),
/* MIRP[27] */ PACK( 2, 0 ),
/* MIRP[28] */ PACK( 2, 0 ),
/* MIRP[29] */ PACK( 2, 0 ),
/* MIRP[30] */ PACK( 2, 0 ),
/* MIRP[31] */ PACK( 2, 0 )
};
#ifdef FT_DEBUG_LEVEL_TRACE
static
const char* const opcode_name[256] =
{
"SVTCA y",
"SVTCA x",
"SPvTCA y",
"SPvTCA x",
"SFvTCA y",
"SFvTCA x",
"SPvTL ||",
"SPvTL +",
"SFvTL ||",
"SFvTL +",
"SPvFS",
"SFvFS",
"GPV",
"GFV",
"SFvTPv",
"ISECT",
"SRP0",
"SRP1",
"SRP2",
"SZP0",
"SZP1",
"SZP2",
"SZPS",
"SLOOP",
"RTG",
"RTHG",
"SMD",
"ELSE",
"JMPR",
"SCvTCi",
"SSwCi",
"SSW",
"DUP",
"POP",
"CLEAR",
"SWAP",
"DEPTH",
"CINDEX",
"MINDEX",
"AlignPTS",
"INS_$28",
"UTP",
"LOOPCALL",
"CALL",
"FDEF",
"ENDF",
"MDAP[0]",
"MDAP[1]",
"IUP[0]",
"IUP[1]",
"SHP[0]",
"SHP[1]",
"SHC[0]",
"SHC[1]",
"SHZ[0]",
"SHZ[1]",
"SHPIX",
"IP",
"MSIRP[0]",
"MSIRP[1]",
"AlignRP",
"RTDG",
"MIAP[0]",
"MIAP[1]",
"NPushB",
"NPushW",
"WS",
"RS",
"WCvtP",
"RCvt",
"GC[0]",
"GC[1]",
"SCFS",
"MD[0]",
"MD[1]",
"MPPEM",
"MPS",
"FlipON",
"FlipOFF",
"DEBUG",
"LT",
"LTEQ",
"GT",
"GTEQ",
"EQ",
"NEQ",
"ODD",
"EVEN",
"IF",
"EIF",
"AND",
"OR",
"NOT",
"DeltaP1",
"SDB",
"SDS",
"ADD",
"SUB",
"DIV",
"MUL",
"ABS",
"NEG",
"FLOOR",
"CEILING",
"ROUND[0]",
"ROUND[1]",
"ROUND[2]",
"ROUND[3]",
"NROUND[0]",
"NROUND[1]",
"NROUND[2]",
"NROUND[3]",
"WCvtF",
"DeltaP2",
"DeltaP3",
"DeltaCn[0]",
"DeltaCn[1]",
"DeltaCn[2]",
"SROUND",
"S45Round",
"JROT",
"JROF",
"ROFF",
"INS_$7B",
"RUTG",
"RDTG",
"SANGW",
"AA",
"FlipPT",
"FlipRgON",
"FlipRgOFF",
"INS_$83",
"INS_$84",
"ScanCTRL",
"SDVPTL[0]",
"SDVPTL[1]",
"GetINFO",
"IDEF",
"ROLL",
"MAX",
"MIN",
"ScanTYPE",
"InstCTRL",
"INS_$8F",
"INS_$90",
"INS_$91",
"INS_$92",
"INS_$93",
"INS_$94",
"INS_$95",
"INS_$96",
"INS_$97",
"INS_$98",
"INS_$99",
"INS_$9A",
"INS_$9B",
"INS_$9C",
"INS_$9D",
"INS_$9E",
"INS_$9F",
"INS_$A0",
"INS_$A1",
"INS_$A2",
"INS_$A3",
"INS_$A4",
"INS_$A5",
"INS_$A6",
"INS_$A7",
"INS_$A8",
"INS_$A9",
"INS_$AA",
"INS_$AB",
"INS_$AC",
"INS_$AD",
"INS_$AE",
"INS_$AF",
"PushB[0]",
"PushB[1]",
"PushB[2]",
"PushB[3]",
"PushB[4]",
"PushB[5]",
"PushB[6]",
"PushB[7]",
"PushW[0]",
"PushW[1]",
"PushW[2]",
"PushW[3]",
"PushW[4]",
"PushW[5]",
"PushW[6]",
"PushW[7]",
"MDRP[00]",
"MDRP[01]",
"MDRP[02]",
"MDRP[03]",
"MDRP[04]",
"MDRP[05]",
"MDRP[06]",
"MDRP[07]",
"MDRP[08]",
"MDRP[09]",
"MDRP[10]",
"MDRP[11]",
"MDRP[12]",
"MDRP[13]",
"MDRP[14]",
"MDRP[15]",
"MDRP[16]",
"MDRP[17]",
"MDRP[18]",
"MDRP[19]",
"MDRP[20]",
"MDRP[21]",
"MDRP[22]",
"MDRP[23]",
"MDRP[24]",
"MDRP[25]",
"MDRP[26]",
"MDRP[27]",
"MDRP[28]",
"MDRP[29]",
"MDRP[30]",
"MDRP[31]",
"MIRP[00]",
"MIRP[01]",
"MIRP[02]",
"MIRP[03]",
"MIRP[04]",
"MIRP[05]",
"MIRP[06]",
"MIRP[07]",
"MIRP[08]",
"MIRP[09]",
"MIRP[10]",
"MIRP[11]",
"MIRP[12]",
"MIRP[13]",
"MIRP[14]",
"MIRP[15]",
"MIRP[16]",
"MIRP[17]",
"MIRP[18]",
"MIRP[19]",
"MIRP[20]",
"MIRP[21]",
"MIRP[22]",
"MIRP[23]",
"MIRP[24]",
"MIRP[25]",
"MIRP[26]",
"MIRP[27]",
"MIRP[28]",
"MIRP[29]",
"MIRP[30]",
"MIRP[31]"
};
#endif /* FT_DEBUG_LEVEL_TRACE */
static
const FT_Char opcode_length[256] =
{
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-1,-2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 3, 4, 5, 6, 7, 8, 9, 3, 5, 7, 9, 11,13,15,17,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
};
#undef PACK
#ifndef FT_CONFIG_OPTION_NO_ASSEMBLER
#if defined( __arm__ ) && \
( defined( __thumb2__ ) || !defined( __thumb__ ) )
#define TT_MulFix14 TT_MulFix14_arm
static FT_Int32
TT_MulFix14_arm( FT_Int32 a,
FT_Int b )
{
register FT_Int32 t, t2;
#if defined( __CC_ARM ) || defined( __ARMCC__ )
__asm
{
smull t2, t, b, a /* (lo=t2,hi=t) = a*b */
mov a, t, asr #31 /* a = (hi >> 31) */
add a, a, #0x2000 /* a += 0x2000 */
adds t2, t2, a /* t2 += a */
adc t, t, #0 /* t += carry */
mov a, t2, lsr #14 /* a = t2 >> 14 */
orr a, a, t, lsl #18 /* a |= t << 18 */
}
#elif defined( __GNUC__ )
__asm__ __volatile__ (
"smull %1, %2, %4, %3\n\t" /* (lo=%1,hi=%2) = a*b */
"mov %0, %2, asr #31\n\t" /* %0 = (hi >> 31) */
"add %0, %0, #0x2000\n\t" /* %0 += 0x2000 */
"adds %1, %1, %0\n\t" /* %1 += %0 */
"adc %2, %2, #0\n\t" /* %2 += carry */
"mov %0, %1, lsr #14\n\t" /* %0 = %1 >> 16 */
"orr %0, %0, %2, lsl #18\n\t" /* %0 |= %2 << 16 */
: "=r"(a), "=&r"(t2), "=&r"(t)
: "r"(a), "r"(b)
: "cc" );
#endif
return a;
}
#endif /* __arm__ && ( __thumb2__ || !__thumb__ ) */
#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
#if defined( __GNUC__ ) && \
( defined( __i386__ ) || defined( __x86_64__ ) )
#define TT_MulFix14 TT_MulFix14_long_long
/* Temporarily disable the warning that C90 doesn't support `long long'. */
#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
#pragma GCC diagnostic push
#endif
#pragma GCC diagnostic ignored "-Wlong-long"
/* This is declared `noinline' because inlining the function results */
/* in slower code. The `pure' attribute indicates that the result */
/* only depends on the parameters. */
static __attribute__(( noinline ))
__attribute__(( pure )) FT_Int32
TT_MulFix14_long_long( FT_Int32 a,
FT_Int b )
{
long long ret = (long long)a * b;
/* The following line assumes that right shifting of signed values */
/* will actually preserve the sign bit. The exact behaviour is */
/* undefined, but this is true on x86 and x86_64. */
long long tmp = ret >> 63;
ret += 0x2000 + tmp;
return (FT_Int32)( ret >> 14 );
}
#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
#pragma GCC diagnostic pop
#endif
#endif /* __GNUC__ && ( __i386__ || __x86_64__ ) */
#ifndef TT_MulFix14
/* Compute (a*b)/2^14 with maximum accuracy and rounding. */
/* This is optimized to be faster than calling FT_MulFix() */
/* for platforms where sizeof(int) == 2. */
static FT_Int32
TT_MulFix14( FT_Int32 a,
FT_Int b )
{
FT_Int32 sign;
FT_UInt32 ah, al, mid, lo, hi;
sign = a ^ b;
if ( a < 0 )
a = -a;
if ( b < 0 )
b = -b;
ah = (FT_UInt32)( ( a >> 16 ) & 0xFFFFU );
al = (FT_UInt32)( a & 0xFFFFU );
lo = al * b;
mid = ah * b;
hi = mid >> 16;
mid = ( mid << 16 ) + ( 1 << 13 ); /* rounding */
lo += mid;
if ( lo < mid )
hi += 1;
mid = ( lo >> 14 ) | ( hi << 18 );
return sign >= 0 ? (FT_Int32)mid : -(FT_Int32)mid;
}
#endif /* !TT_MulFix14 */
#if defined( __GNUC__ ) && \
( defined( __i386__ ) || \
defined( __x86_64__ ) || \
defined( __arm__ ) )
#define TT_DotFix14 TT_DotFix14_long_long
#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
#pragma GCC diagnostic push
#endif
#pragma GCC diagnostic ignored "-Wlong-long"
static __attribute__(( pure )) FT_Int32
TT_DotFix14_long_long( FT_Int32 ax,
FT_Int32 ay,
FT_Int bx,
FT_Int by )
{
/* Temporarily disable the warning that C90 doesn't support */
/* `long long'. */
long long temp1 = (long long)ax * bx;
long long temp2 = (long long)ay * by;
temp1 += temp2;
temp2 = temp1 >> 63;
temp1 += 0x2000 + temp2;
return (FT_Int32)( temp1 >> 14 );
}
#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
#pragma GCC diagnostic pop
#endif
#endif /* __GNUC__ && (__arm__ || __i386__ || __x86_64__) */
#ifndef TT_DotFix14
/* compute (ax*bx+ay*by)/2^14 with maximum accuracy and rounding */
static FT_Int32
TT_DotFix14( FT_Int32 ax,
FT_Int32 ay,
FT_Int bx,
FT_Int by )
{
FT_Int32 m, s, hi1, hi2, hi;
FT_UInt32 l, lo1, lo2, lo;
/* compute ax*bx as 64-bit value */
l = (FT_UInt32)( ( ax & 0xFFFFU ) * bx );
m = ( ax >> 16 ) * bx;
lo1 = l + ( (FT_UInt32)m << 16 );
hi1 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo1 < l );
/* compute ay*by as 64-bit value */
l = (FT_UInt32)( ( ay & 0xFFFFU ) * by );
m = ( ay >> 16 ) * by;
lo2 = l + ( (FT_UInt32)m << 16 );
hi2 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo2 < l );
/* add them */
lo = lo1 + lo2;
hi = hi1 + hi2 + ( lo < lo1 );
/* divide the result by 2^14 with rounding */
s = hi >> 31;
l = lo + (FT_UInt32)s;
hi += s + ( l < lo );
lo = l;
l = lo + 0x2000U;
hi += ( l < lo );
return (FT_Int32)( ( (FT_UInt32)hi << 18 ) | ( l >> 14 ) );
}
#endif /* TT_DotFix14 */
/*************************************************************************/
/* */
/* <Function> */
/* Current_Ratio */
/* */
/* <Description> */
/* Returns the current aspect ratio scaling factor depending on the */
/* projection vector's state and device resolutions. */
/* */
/* <Return> */
/* The aspect ratio in 16.16 format, always <= 1.0 . */
/* */
static FT_Long
Current_Ratio( EXEC_OP )
{
if ( !CUR.tt_metrics.ratio )
{
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
if ( CUR.face->unpatented_hinting )
{
if ( CUR.GS.both_x_axis )
CUR.tt_metrics.ratio = CUR.tt_metrics.x_ratio;
else
CUR.tt_metrics.ratio = CUR.tt_metrics.y_ratio;
}
else
#endif
{
if ( CUR.GS.projVector.y == 0 )
CUR.tt_metrics.ratio = CUR.tt_metrics.x_ratio;
else if ( CUR.GS.projVector.x == 0 )
CUR.tt_metrics.ratio = CUR.tt_metrics.y_ratio;
else
{
FT_F26Dot6 x, y;
x = TT_MulFix14( CUR.tt_metrics.x_ratio,
CUR.GS.projVector.x );
y = TT_MulFix14( CUR.tt_metrics.y_ratio,
CUR.GS.projVector.y );
CUR.tt_metrics.ratio = FT_Hypot( x, y );
}
}
}
return CUR.tt_metrics.ratio;
}
static FT_Long
Current_Ppem( EXEC_OP )
{
return FT_MulFix( CUR.tt_metrics.ppem, CURRENT_Ratio() );
}
/*************************************************************************/
/* */
/* Functions related to the control value table (CVT). */
/* */
/*************************************************************************/
FT_CALLBACK_DEF( FT_F26Dot6 )
Read_CVT( EXEC_OP_ FT_ULong idx )
{
return CUR.cvt[idx];
}
FT_CALLBACK_DEF( FT_F26Dot6 )
Read_CVT_Stretched( EXEC_OP_ FT_ULong idx )
{
return FT_MulFix( CUR.cvt[idx], CURRENT_Ratio() );
}
FT_CALLBACK_DEF( void )
Write_CVT( EXEC_OP_ FT_ULong idx,
FT_F26Dot6 value )
{
CUR.cvt[idx] = value;
}
FT_CALLBACK_DEF( void )
Write_CVT_Stretched( EXEC_OP_ FT_ULong idx,
FT_F26Dot6 value )
{
CUR.cvt[idx] = FT_DivFix( value, CURRENT_Ratio() );
}
FT_CALLBACK_DEF( void )
Move_CVT( EXEC_OP_ FT_ULong idx,
FT_F26Dot6 value )
{
CUR.cvt[idx] += value;
}
FT_CALLBACK_DEF( void )
Move_CVT_Stretched( EXEC_OP_ FT_ULong idx,
FT_F26Dot6 value )
{
CUR.cvt[idx] += FT_DivFix( value, CURRENT_Ratio() );
}
/*************************************************************************/
/* */
/* <Function> */
/* GetShortIns */
/* */
/* <Description> */
/* Returns a short integer taken from the instruction stream at */
/* address IP. */
/* */
/* <Return> */
/* Short read at code[IP]. */
/* */
/* <Note> */
/* This one could become a macro. */
/* */
static FT_Short
GetShortIns( EXEC_OP )
{
/* Reading a byte stream so there is no endianess (DaveP) */
CUR.IP += 2;
return (FT_Short)( ( CUR.code[CUR.IP - 2] << 8 ) +
CUR.code[CUR.IP - 1] );
}
/*************************************************************************/
/* */
/* <Function> */
/* Ins_Goto_CodeRange */
/* */
/* <Description> */
/* Goes to a certain code range in the instruction stream. */
/* */
/* <Input> */
/* aRange :: The index of the code range. */
/* */
/* aIP :: The new IP address in the code range. */
/* */
/* <Return> */
/* SUCCESS or FAILURE. */
/* */
static FT_Bool
Ins_Goto_CodeRange( EXEC_OP_ FT_Int aRange,
FT_ULong aIP )
{
TT_CodeRange* range;
if ( aRange < 1 || aRange > 3 )
{
CUR.error = FT_THROW( Bad_Argument );
return FAILURE;
}
range = &CUR.codeRangeTable[aRange - 1];
if ( range->base == NULL ) /* invalid coderange */
{
CUR.error = FT_THROW( Invalid_CodeRange );
return FAILURE;
}
/* NOTE: Because the last instruction of a program may be a CALL */
/* which will return to the first byte *after* the code */
/* range, we test for aIP <= Size, instead of aIP < Size. */
if ( aIP > range->size )
{
CUR.error = FT_THROW( Code_Overflow );
return FAILURE;
}
CUR.code = range->base;
CUR.codeSize = range->size;
CUR.IP = aIP;
CUR.curRange = aRange;
return SUCCESS;
}
/*************************************************************************/
/* */
/* <Function> */
/* Direct_Move */
/* */
/* <Description> */
/* Moves a point by a given distance along the freedom vector. The */
/* point will be `touched'. */
/* */
/* <Input> */
/* point :: The index of the point to move. */
/* */
/* distance :: The distance to apply. */
/* */
/* <InOut> */
/* zone :: The affected glyph zone. */
/* */
static void
Direct_Move( EXEC_OP_ TT_GlyphZone zone,
FT_UShort point,
FT_F26Dot6 distance )
{
FT_F26Dot6 v;
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
FT_ASSERT( !CUR.face->unpatented_hinting );
#endif
v = CUR.GS.freeVector.x;
if ( v != 0 )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVE ) ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
zone->cur[point].x += FT_MulDiv( distance, v, CUR.F_dot_P );
zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
}
v = CUR.GS.freeVector.y;
if ( v != 0 )
{
zone->cur[point].y += FT_MulDiv( distance, v, CUR.F_dot_P );
zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y;
}
}
/*************************************************************************/
/* */
/* <Function> */
/* Direct_Move_Orig */
/* */
/* <Description> */
/* Moves the *original* position of a point by a given distance along */
/* the freedom vector. Obviously, the point will not be `touched'. */
/* */
/* <Input> */
/* point :: The index of the point to move. */
/* */
/* distance :: The distance to apply. */
/* */
/* <InOut> */
/* zone :: The affected glyph zone. */
/* */
static void
Direct_Move_Orig( EXEC_OP_ TT_GlyphZone zone,
FT_UShort point,
FT_F26Dot6 distance )
{
FT_F26Dot6 v;
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
FT_ASSERT( !CUR.face->unpatented_hinting );
#endif
v = CUR.GS.freeVector.x;
if ( v != 0 )
zone->org[point].x += FT_MulDiv( distance, v, CUR.F_dot_P );
v = CUR.GS.freeVector.y;
if ( v != 0 )
zone->org[point].y += FT_MulDiv( distance, v, CUR.F_dot_P );
}
/*************************************************************************/
/* */
/* Special versions of Direct_Move() */
/* */
/* The following versions are used whenever both vectors are both */
/* along one of the coordinate unit vectors, i.e. in 90% of the cases. */
/* */
/*************************************************************************/
static void
Direct_Move_X( EXEC_OP_ TT_GlyphZone zone,
FT_UShort point,
FT_F26Dot6 distance )
{
FT_UNUSED_EXEC;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( !SUBPIXEL_HINTING ||
!CUR.ignore_x_mode )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
zone->cur[point].x += distance;
zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
}
static void
Direct_Move_Y( EXEC_OP_ TT_GlyphZone zone,
FT_UShort point,
FT_F26Dot6 distance )
{
FT_UNUSED_EXEC;
zone->cur[point].y += distance;
zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y;
}
/*************************************************************************/
/* */
/* Special versions of Direct_Move_Orig() */
/* */
/* The following versions are used whenever both vectors are both */
/* along one of the coordinate unit vectors, i.e. in 90% of the cases. */
/* */
/*************************************************************************/
static void
Direct_Move_Orig_X( EXEC_OP_ TT_GlyphZone zone,
FT_UShort point,
FT_F26Dot6 distance )
{
FT_UNUSED_EXEC;
zone->org[point].x += distance;
}
static void
Direct_Move_Orig_Y( EXEC_OP_ TT_GlyphZone zone,
FT_UShort point,
FT_F26Dot6 distance )
{
FT_UNUSED_EXEC;
zone->org[point].y += distance;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_None */
/* */
/* <Description> */
/* Does not round, but adds engine compensation. */
/* */
/* <Input> */
/* distance :: The distance (not) to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* The compensated distance. */
/* */
/* <Note> */
/* The TrueType specification says very few about the relationship */
/* between rounding and engine compensation. However, it seems from */
/* the description of super round that we should add the compensation */
/* before rounding. */
/* */
static FT_F26Dot6
Round_None( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
FT_UNUSED_EXEC;
if ( distance >= 0 )
{
val = distance + compensation;
if ( distance && val < 0 )
val = 0;
}
else
{
val = distance - compensation;
if ( val > 0 )
val = 0;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_To_Grid */
/* */
/* <Description> */
/* Rounds value to grid after adding engine compensation. */
/* */
/* <Input> */
/* distance :: The distance to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* Rounded distance. */
/* */
static FT_F26Dot6
Round_To_Grid( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
FT_UNUSED_EXEC;
if ( distance >= 0 )
{
val = distance + compensation + 32;
if ( distance && val > 0 )
val &= ~63;
else
val = 0;
}
else
{
val = -FT_PIX_ROUND( compensation - distance );
if ( val > 0 )
val = 0;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_To_Half_Grid */
/* */
/* <Description> */
/* Rounds value to half grid after adding engine compensation. */
/* */
/* <Input> */
/* distance :: The distance to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* Rounded distance. */
/* */
static FT_F26Dot6
Round_To_Half_Grid( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
FT_UNUSED_EXEC;
if ( distance >= 0 )
{
val = FT_PIX_FLOOR( distance + compensation ) + 32;
if ( distance && val < 0 )
val = 0;
}
else
{
val = -( FT_PIX_FLOOR( compensation - distance ) + 32 );
if ( val > 0 )
val = 0;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_Down_To_Grid */
/* */
/* <Description> */
/* Rounds value down to grid after adding engine compensation. */
/* */
/* <Input> */
/* distance :: The distance to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* Rounded distance. */
/* */
static FT_F26Dot6
Round_Down_To_Grid( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
FT_UNUSED_EXEC;
if ( distance >= 0 )
{
val = distance + compensation;
if ( distance && val > 0 )
val &= ~63;
else
val = 0;
}
else
{
val = -( ( compensation - distance ) & -64 );
if ( val > 0 )
val = 0;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_Up_To_Grid */
/* */
/* <Description> */
/* Rounds value up to grid after adding engine compensation. */
/* */
/* <Input> */
/* distance :: The distance to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* Rounded distance. */
/* */
static FT_F26Dot6
Round_Up_To_Grid( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
FT_UNUSED_EXEC;
if ( distance >= 0 )
{
val = distance + compensation + 63;
if ( distance && val > 0 )
val &= ~63;
else
val = 0;
}
else
{
val = -FT_PIX_CEIL( compensation - distance );
if ( val > 0 )
val = 0;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_To_Double_Grid */
/* */
/* <Description> */
/* Rounds value to double grid after adding engine compensation. */
/* */
/* <Input> */
/* distance :: The distance to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* Rounded distance. */
/* */
static FT_F26Dot6
Round_To_Double_Grid( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
FT_UNUSED_EXEC;
if ( distance >= 0 )
{
val = distance + compensation + 16;
if ( distance && val > 0 )
val &= ~31;
else
val = 0;
}
else
{
val = -FT_PAD_ROUND( compensation - distance, 32 );
if ( val > 0 )
val = 0;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_Super */
/* */
/* <Description> */
/* Super-rounds value to grid after adding engine compensation. */
/* */
/* <Input> */
/* distance :: The distance to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* Rounded distance. */
/* */
/* <Note> */
/* The TrueType specification says very few about the relationship */
/* between rounding and engine compensation. However, it seems from */
/* the description of super round that we should add the compensation */
/* before rounding. */
/* */
static FT_F26Dot6
Round_Super( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
if ( distance >= 0 )
{
val = ( distance - CUR.phase + CUR.threshold + compensation ) &
-CUR.period;
if ( distance && val < 0 )
val = 0;
val += CUR.phase;
}
else
{
val = -( ( CUR.threshold - CUR.phase - distance + compensation ) &
-CUR.period );
if ( val > 0 )
val = 0;
val -= CUR.phase;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Round_Super_45 */
/* */
/* <Description> */
/* Super-rounds value to grid after adding engine compensation. */
/* */
/* <Input> */
/* distance :: The distance to round. */
/* */
/* compensation :: The engine compensation. */
/* */
/* <Return> */
/* Rounded distance. */
/* */
/* <Note> */
/* There is a separate function for Round_Super_45() as we may need */
/* greater precision. */
/* */
static FT_F26Dot6
Round_Super_45( EXEC_OP_ FT_F26Dot6 distance,
FT_F26Dot6 compensation )
{
FT_F26Dot6 val;
if ( distance >= 0 )
{
val = ( ( distance - CUR.phase + CUR.threshold + compensation ) /
CUR.period ) * CUR.period;
if ( distance && val < 0 )
val = 0;
val += CUR.phase;
}
else
{
val = -( ( ( CUR.threshold - CUR.phase - distance + compensation ) /
CUR.period ) * CUR.period );
if ( val > 0 )
val = 0;
val -= CUR.phase;
}
return val;
}
/*************************************************************************/
/* */
/* <Function> */
/* Compute_Round */
/* */
/* <Description> */
/* Sets the rounding mode. */
/* */
/* <Input> */
/* round_mode :: The rounding mode to be used. */
/* */
static void
Compute_Round( EXEC_OP_ FT_Byte round_mode )
{
switch ( round_mode )
{
case TT_Round_Off:
CUR.func_round = (TT_Round_Func)Round_None;
break;
case TT_Round_To_Grid:
CUR.func_round = (TT_Round_Func)Round_To_Grid;
break;
case TT_Round_Up_To_Grid:
CUR.func_round = (TT_Round_Func)Round_Up_To_Grid;
break;
case TT_Round_Down_To_Grid:
CUR.func_round = (TT_Round_Func)Round_Down_To_Grid;
break;
case TT_Round_To_Half_Grid:
CUR.func_round = (TT_Round_Func)Round_To_Half_Grid;
break;
case TT_Round_To_Double_Grid:
CUR.func_round = (TT_Round_Func)Round_To_Double_Grid;
break;
case TT_Round_Super:
CUR.func_round = (TT_Round_Func)Round_Super;
break;
case TT_Round_Super_45:
CUR.func_round = (TT_Round_Func)Round_Super_45;
break;
}
}
/*************************************************************************/
/* */
/* <Function> */
/* SetSuperRound */
/* */
/* <Description> */
/* Sets Super Round parameters. */
/* */
/* <Input> */
/* GridPeriod :: The grid period. */
/* */
/* selector :: The SROUND opcode. */
/* */
static void
SetSuperRound( EXEC_OP_ FT_F26Dot6 GridPeriod,
FT_Long selector )
{
switch ( (FT_Int)( selector & 0xC0 ) )
{
case 0:
CUR.period = GridPeriod / 2;
break;
case 0x40:
CUR.period = GridPeriod;
break;
case 0x80:
CUR.period = GridPeriod * 2;
break;
/* This opcode is reserved, but... */
case 0xC0:
CUR.period = GridPeriod;
break;
}
switch ( (FT_Int)( selector & 0x30 ) )
{
case 0:
CUR.phase = 0;
break;
case 0x10:
CUR.phase = CUR.period / 4;
break;
case 0x20:
CUR.phase = CUR.period / 2;
break;
case 0x30:
CUR.phase = CUR.period * 3 / 4;
break;
}
if ( ( selector & 0x0F ) == 0 )
CUR.threshold = CUR.period - 1;
else
CUR.threshold = ( (FT_Int)( selector & 0x0F ) - 4 ) * CUR.period / 8;
CUR.period /= 256;
CUR.phase /= 256;
CUR.threshold /= 256;
}
/*************************************************************************/
/* */
/* <Function> */
/* Project */
/* */
/* <Description> */
/* Computes the projection of vector given by (v2-v1) along the */
/* current projection vector. */
/* */
/* <Input> */
/* v1 :: First input vector. */
/* v2 :: Second input vector. */
/* */
/* <Return> */
/* The distance in F26dot6 format. */
/* */
static FT_F26Dot6
Project( EXEC_OP_ FT_Pos dx,
FT_Pos dy )
{
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
FT_ASSERT( !CUR.face->unpatented_hinting );
#endif
return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy,
CUR.GS.projVector.x,
CUR.GS.projVector.y );
}
/*************************************************************************/
/* */
/* <Function> */
/* Dual_Project */
/* */
/* <Description> */
/* Computes the projection of the vector given by (v2-v1) along the */
/* current dual vector. */
/* */
/* <Input> */
/* v1 :: First input vector. */
/* v2 :: Second input vector. */
/* */
/* <Return> */
/* The distance in F26dot6 format. */
/* */
static FT_F26Dot6
Dual_Project( EXEC_OP_ FT_Pos dx,
FT_Pos dy )
{
return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy,
CUR.GS.dualVector.x,
CUR.GS.dualVector.y );
}
/*************************************************************************/
/* */
/* <Function> */
/* Project_x */
/* */
/* <Description> */
/* Computes the projection of the vector given by (v2-v1) along the */
/* horizontal axis. */
/* */
/* <Input> */
/* v1 :: First input vector. */
/* v2 :: Second input vector. */
/* */
/* <Return> */
/* The distance in F26dot6 format. */
/* */
static FT_F26Dot6
Project_x( EXEC_OP_ FT_Pos dx,
FT_Pos dy )
{
FT_UNUSED_EXEC;
FT_UNUSED( dy );
return dx;
}
/*************************************************************************/
/* */
/* <Function> */
/* Project_y */
/* */
/* <Description> */
/* Computes the projection of the vector given by (v2-v1) along the */
/* vertical axis. */
/* */
/* <Input> */
/* v1 :: First input vector. */
/* v2 :: Second input vector. */
/* */
/* <Return> */
/* The distance in F26dot6 format. */
/* */
static FT_F26Dot6
Project_y( EXEC_OP_ FT_Pos dx,
FT_Pos dy )
{
FT_UNUSED_EXEC;
FT_UNUSED( dx );
return dy;
}
/*************************************************************************/
/* */
/* <Function> */
/* Compute_Funcs */
/* */
/* <Description> */
/* Computes the projection and movement function pointers according */
/* to the current graphics state. */
/* */
static void
Compute_Funcs( EXEC_OP )
{
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
if ( CUR.face->unpatented_hinting )
{
/* If both vectors point rightwards along the x axis, set */
/* `both-x-axis' true, otherwise set it false. The x values only */
/* need be tested because the vector has been normalised to a unit */
/* vector of length 0x4000 = unity. */
CUR.GS.both_x_axis = (FT_Bool)( CUR.GS.projVector.x == 0x4000 &&
CUR.GS.freeVector.x == 0x4000 );
/* Throw away projection and freedom vector information */
/* because the patents don't allow them to be stored. */
/* The relevant US Patents are 5155805 and 5325479. */
CUR.GS.projVector.x = 0;
CUR.GS.projVector.y = 0;
CUR.GS.freeVector.x = 0;
CUR.GS.freeVector.y = 0;
if ( CUR.GS.both_x_axis )
{
CUR.func_project = Project_x;
CUR.func_move = Direct_Move_X;
CUR.func_move_orig = Direct_Move_Orig_X;
}
else
{
CUR.func_project = Project_y;
CUR.func_move = Direct_Move_Y;
CUR.func_move_orig = Direct_Move_Orig_Y;
}
if ( CUR.GS.dualVector.x == 0x4000 )
CUR.func_dualproj = Project_x;
else if ( CUR.GS.dualVector.y == 0x4000 )
CUR.func_dualproj = Project_y;
else
CUR.func_dualproj = Dual_Project;
/* Force recalculation of cached aspect ratio */
CUR.tt_metrics.ratio = 0;
return;
}
#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING */
if ( CUR.GS.freeVector.x == 0x4000 )
CUR.F_dot_P = CUR.GS.projVector.x;
else if ( CUR.GS.freeVector.y == 0x4000 )
CUR.F_dot_P = CUR.GS.projVector.y;
else
CUR.F_dot_P = ( (FT_Long)CUR.GS.projVector.x * CUR.GS.freeVector.x +
(FT_Long)CUR.GS.projVector.y * CUR.GS.freeVector.y ) >>
14;
if ( CUR.GS.projVector.x == 0x4000 )
CUR.func_project = (TT_Project_Func)Project_x;
else if ( CUR.GS.projVector.y == 0x4000 )
CUR.func_project = (TT_Project_Func)Project_y;
else
CUR.func_project = (TT_Project_Func)Project;
if ( CUR.GS.dualVector.x == 0x4000 )
CUR.func_dualproj = (TT_Project_Func)Project_x;
else if ( CUR.GS.dualVector.y == 0x4000 )
CUR.func_dualproj = (TT_Project_Func)Project_y;
else
CUR.func_dualproj = (TT_Project_Func)Dual_Project;
CUR.func_move = (TT_Move_Func)Direct_Move;
CUR.func_move_orig = (TT_Move_Func)Direct_Move_Orig;
if ( CUR.F_dot_P == 0x4000L )
{
if ( CUR.GS.freeVector.x == 0x4000 )
{
CUR.func_move = (TT_Move_Func)Direct_Move_X;
CUR.func_move_orig = (TT_Move_Func)Direct_Move_Orig_X;
}
else if ( CUR.GS.freeVector.y == 0x4000 )
{
CUR.func_move = (TT_Move_Func)Direct_Move_Y;
CUR.func_move_orig = (TT_Move_Func)Direct_Move_Orig_Y;
}
}
/* at small sizes, F_dot_P can become too small, resulting */
/* in overflows and `spikes' in a number of glyphs like `w'. */
if ( FT_ABS( CUR.F_dot_P ) < 0x400L )
CUR.F_dot_P = 0x4000L;
/* Disable cached aspect ratio */
CUR.tt_metrics.ratio = 0;
}
/*************************************************************************/
/* */
/* <Function> */
/* Normalize */
/* */
/* <Description> */
/* Norms a vector. */
/* */
/* <Input> */
/* Vx :: The horizontal input vector coordinate. */
/* Vy :: The vertical input vector coordinate. */
/* */
/* <Output> */
/* R :: The normed unit vector. */
/* */
/* <Return> */
/* Returns FAILURE if a vector parameter is zero. */
/* */
/* <Note> */
/* In case Vx and Vy are both zero, Normalize() returns SUCCESS, and */
/* R is undefined. */
/* */
static FT_Bool
Normalize( EXEC_OP_ FT_F26Dot6 Vx,
FT_F26Dot6 Vy,
FT_UnitVector* R )
{
FT_F26Dot6 W;
FT_UNUSED_EXEC;
if ( FT_ABS( Vx ) < 0x4000L && FT_ABS( Vy ) < 0x4000L )
{
if ( Vx == 0 && Vy == 0 )
{
/* XXX: UNDOCUMENTED! It seems that it is possible to try */
/* to normalize the vector (0,0). Return immediately. */
return SUCCESS;
}
Vx *= 0x4000;
Vy *= 0x4000;
}
W = FT_Hypot( Vx, Vy );
R->x = (FT_F2Dot14)TT_DivFix14( Vx, W );
R->y = (FT_F2Dot14)TT_DivFix14( Vy, W );
return SUCCESS;
}
/*************************************************************************/
/* */
/* Here we start with the implementation of the various opcodes. */
/* */
/*************************************************************************/
static FT_Bool
Ins_SxVTL( EXEC_OP_ FT_UShort aIdx1,
FT_UShort aIdx2,
FT_Int aOpc,
FT_UnitVector* Vec )
{
FT_Long A, B, C;
FT_Vector* p1;
FT_Vector* p2;
if ( BOUNDS( aIdx1, CUR.zp2.n_points ) ||
BOUNDS( aIdx2, CUR.zp1.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return FAILURE;
}
p1 = CUR.zp1.cur + aIdx2;
p2 = CUR.zp2.cur + aIdx1;
A = p1->x - p2->x;
B = p1->y - p2->y;
/* If p1 == p2, SPVTL and SFVTL behave the same as */
/* SPVTCA[X] and SFVTCA[X], respectively. */
/* */
/* Confirmed by Greg Hitchcock. */
if ( A == 0 && B == 0 )
{
A = 0x4000;
aOpc = 0;
}
if ( ( aOpc & 1 ) != 0 )
{
C = B; /* counter clockwise rotation */
B = A;
A = -C;
}
NORMalize( A, B, Vec );
return SUCCESS;
}
/* When not using the big switch statements, the interpreter uses a */
/* call table defined later below in this source. Each opcode must */
/* thus have a corresponding function, even trivial ones. */
/* */
/* They are all defined there. */
#define DO_SVTCA \
{ \
FT_Short A, B; \
\
\
A = (FT_Short)( CUR.opcode & 1 ) << 14; \
B = A ^ (FT_Short)0x4000; \
\
CUR.GS.freeVector.x = A; \
CUR.GS.projVector.x = A; \
CUR.GS.dualVector.x = A; \
\
CUR.GS.freeVector.y = B; \
CUR.GS.projVector.y = B; \
CUR.GS.dualVector.y = B; \
\
COMPUTE_Funcs(); \
}
#define DO_SPVTCA \
{ \
FT_Short A, B; \
\
\
A = (FT_Short)( CUR.opcode & 1 ) << 14; \
B = A ^ (FT_Short)0x4000; \
\
CUR.GS.projVector.x = A; \
CUR.GS.dualVector.x = A; \
\
CUR.GS.projVector.y = B; \
CUR.GS.dualVector.y = B; \
\
GUESS_VECTOR( freeVector ); \
\
COMPUTE_Funcs(); \
}
#define DO_SFVTCA \
{ \
FT_Short A, B; \
\
\
A = (FT_Short)( CUR.opcode & 1 ) << 14; \
B = A ^ (FT_Short)0x4000; \
\
CUR.GS.freeVector.x = A; \
CUR.GS.freeVector.y = B; \
\
GUESS_VECTOR( projVector ); \
\
COMPUTE_Funcs(); \
}
#define DO_SPVTL \
if ( INS_SxVTL( (FT_UShort)args[1], \
(FT_UShort)args[0], \
CUR.opcode, \
&CUR.GS.projVector ) == SUCCESS ) \
{ \
CUR.GS.dualVector = CUR.GS.projVector; \
GUESS_VECTOR( freeVector ); \
COMPUTE_Funcs(); \
}
#define DO_SFVTL \
if ( INS_SxVTL( (FT_UShort)args[1], \
(FT_UShort)args[0], \
CUR.opcode, \
&CUR.GS.freeVector ) == SUCCESS ) \
{ \
GUESS_VECTOR( projVector ); \
COMPUTE_Funcs(); \
}
#define DO_SFVTPV \
GUESS_VECTOR( projVector ); \
CUR.GS.freeVector = CUR.GS.projVector; \
COMPUTE_Funcs();
#define DO_SPVFS \
{ \
FT_Short S; \
FT_Long X, Y; \
\
\
/* Only use low 16bits, then sign extend */ \
S = (FT_Short)args[1]; \
Y = (FT_Long)S; \
S = (FT_Short)args[0]; \
X = (FT_Long)S; \
\
NORMalize( X, Y, &CUR.GS.projVector ); \
\
CUR.GS.dualVector = CUR.GS.projVector; \
GUESS_VECTOR( freeVector ); \
COMPUTE_Funcs(); \
}
#define DO_SFVFS \
{ \
FT_Short S; \
FT_Long X, Y; \
\
\
/* Only use low 16bits, then sign extend */ \
S = (FT_Short)args[1]; \
Y = (FT_Long)S; \
S = (FT_Short)args[0]; \
X = S; \
\
NORMalize( X, Y, &CUR.GS.freeVector ); \
GUESS_VECTOR( projVector ); \
COMPUTE_Funcs(); \
}
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
#define DO_GPV \
if ( CUR.face->unpatented_hinting ) \
{ \
args[0] = CUR.GS.both_x_axis ? 0x4000 : 0; \
args[1] = CUR.GS.both_x_axis ? 0 : 0x4000; \
} \
else \
{ \
args[0] = CUR.GS.projVector.x; \
args[1] = CUR.GS.projVector.y; \
}
#else
#define DO_GPV \
args[0] = CUR.GS.projVector.x; \
args[1] = CUR.GS.projVector.y;
#endif
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
#define DO_GFV \
if ( CUR.face->unpatented_hinting ) \
{ \
args[0] = CUR.GS.both_x_axis ? 0x4000 : 0; \
args[1] = CUR.GS.both_x_axis ? 0 : 0x4000; \
} \
else \
{ \
args[0] = CUR.GS.freeVector.x; \
args[1] = CUR.GS.freeVector.y; \
}
#else
#define DO_GFV \
args[0] = CUR.GS.freeVector.x; \
args[1] = CUR.GS.freeVector.y;
#endif
#define DO_SRP0 \
CUR.GS.rp0 = (FT_UShort)args[0];
#define DO_SRP1 \
CUR.GS.rp1 = (FT_UShort)args[0];
#define DO_SRP2 \
CUR.GS.rp2 = (FT_UShort)args[0];
#define DO_RTHG \
CUR.GS.round_state = TT_Round_To_Half_Grid; \
CUR.func_round = (TT_Round_Func)Round_To_Half_Grid;
#define DO_RTG \
CUR.GS.round_state = TT_Round_To_Grid; \
CUR.func_round = (TT_Round_Func)Round_To_Grid;
#define DO_RTDG \
CUR.GS.round_state = TT_Round_To_Double_Grid; \
CUR.func_round = (TT_Round_Func)Round_To_Double_Grid;
#define DO_RUTG \
CUR.GS.round_state = TT_Round_Up_To_Grid; \
CUR.func_round = (TT_Round_Func)Round_Up_To_Grid;
#define DO_RDTG \
CUR.GS.round_state = TT_Round_Down_To_Grid; \
CUR.func_round = (TT_Round_Func)Round_Down_To_Grid;
#define DO_ROFF \
CUR.GS.round_state = TT_Round_Off; \
CUR.func_round = (TT_Round_Func)Round_None;
#define DO_SROUND \
SET_SuperRound( 0x4000, args[0] ); \
CUR.GS.round_state = TT_Round_Super; \
CUR.func_round = (TT_Round_Func)Round_Super;
#define DO_S45ROUND \
SET_SuperRound( 0x2D41, args[0] ); \
CUR.GS.round_state = TT_Round_Super_45; \
CUR.func_round = (TT_Round_Func)Round_Super_45;
#define DO_SLOOP \
if ( args[0] < 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
else \
CUR.GS.loop = args[0];
#define DO_SMD \
CUR.GS.minimum_distance = args[0];
#define DO_SCVTCI \
CUR.GS.control_value_cutin = (FT_F26Dot6)args[0];
#define DO_SSWCI \
CUR.GS.single_width_cutin = (FT_F26Dot6)args[0];
#define DO_SSW \
CUR.GS.single_width_value = FT_MulFix( args[0], \
CUR.tt_metrics.scale );
#define DO_FLIPON \
CUR.GS.auto_flip = TRUE;
#define DO_FLIPOFF \
CUR.GS.auto_flip = FALSE;
#define DO_SDB \
CUR.GS.delta_base = (FT_Short)args[0];
#define DO_SDS \
CUR.GS.delta_shift = (FT_Short)args[0];
#define DO_MD /* nothing */
#define DO_MPPEM \
args[0] = CURRENT_Ppem();
/* Note: The pointSize should be irrelevant in a given font program; */
/* we thus decide to return only the ppem. */
#if 0
#define DO_MPS \
args[0] = CUR.metrics.pointSize;
#else
#define DO_MPS \
args[0] = CURRENT_Ppem();
#endif /* 0 */
#define DO_DUP \
args[1] = args[0];
#define DO_CLEAR \
CUR.new_top = 0;
#define DO_SWAP \
{ \
FT_Long L; \
\
\
L = args[0]; \
args[0] = args[1]; \
args[1] = L; \
}
#define DO_DEPTH \
args[0] = CUR.top;
#define DO_CINDEX \
{ \
FT_Long L; \
\
\
L = args[0]; \
\
if ( L <= 0 || L > CUR.args ) \
{ \
if ( CUR.pedantic_hinting ) \
CUR.error = FT_THROW( Invalid_Reference ); \
args[0] = 0; \
} \
else \
args[0] = CUR.stack[CUR.args - L]; \
}
#define DO_JROT \
if ( args[1] != 0 ) \
{ \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE; \
}
#define DO_JMPR \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE;
#define DO_JROF \
if ( args[1] == 0 ) \
{ \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE; \
}
#define DO_LT \
args[0] = ( args[0] < args[1] );
#define DO_LTEQ \
args[0] = ( args[0] <= args[1] );
#define DO_GT \
args[0] = ( args[0] > args[1] );
#define DO_GTEQ \
args[0] = ( args[0] >= args[1] );
#define DO_EQ \
args[0] = ( args[0] == args[1] );
#define DO_NEQ \
args[0] = ( args[0] != args[1] );
#define DO_ODD \
args[0] = ( ( CUR_Func_round( args[0], 0 ) & 127 ) == 64 );
#define DO_EVEN \
args[0] = ( ( CUR_Func_round( args[0], 0 ) & 127 ) == 0 );
#define DO_AND \
args[0] = ( args[0] && args[1] );
#define DO_OR \
args[0] = ( args[0] || args[1] );
#define DO_NOT \
args[0] = !args[0];
#define DO_ADD \
args[0] += args[1];
#define DO_SUB \
args[0] -= args[1];
#define DO_DIV \
if ( args[1] == 0 ) \
CUR.error = FT_THROW( Divide_By_Zero ); \
else \
args[0] = FT_MulDiv_No_Round( args[0], 64L, args[1] );
#define DO_MUL \
args[0] = FT_MulDiv( args[0], args[1], 64L );
#define DO_ABS \
args[0] = FT_ABS( args[0] );
#define DO_NEG \
args[0] = -args[0];
#define DO_FLOOR \
args[0] = FT_PIX_FLOOR( args[0] );
#define DO_CEILING \
args[0] = FT_PIX_CEIL( args[0] );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
#define DO_RS \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDSL( I, CUR.storeSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
ARRAY_BOUND_ERROR; \
else \
args[0] = 0; \
} \
else \
{ \
/* subpixel hinting - avoid Typeman Dstroke and */ \
/* IStroke and Vacuform rounds */ \
\
if ( SUBPIXEL_HINTING && \
CUR.ignore_x_mode && \
( ( I == 24 && \
( CUR.face->sph_found_func_flags & \
( SPH_FDEF_SPACING_1 | \
SPH_FDEF_SPACING_2 ) ) ) || \
( I == 22 && \
( CUR.sph_in_func_flags & \
SPH_FDEF_TYPEMAN_STROKES ) ) || \
( I == 8 && \
( CUR.face->sph_found_func_flags & \
SPH_FDEF_VACUFORM_ROUND_1 ) && \
CUR.iup_called ) ) ) \
args[0] = 0; \
else \
args[0] = CUR.storage[I]; \
} \
}
#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#define DO_RS \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDSL( I, CUR.storeSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
{ \
ARRAY_BOUND_ERROR; \
} \
else \
args[0] = 0; \
} \
else \
args[0] = CUR.storage[I]; \
}
#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#define DO_WS \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDSL( I, CUR.storeSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
{ \
ARRAY_BOUND_ERROR; \
} \
} \
else \
CUR.storage[I] = args[1]; \
}
#define DO_RCVT \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDSL( I, CUR.cvtSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
{ \
ARRAY_BOUND_ERROR; \
} \
else \
args[0] = 0; \
} \
else \
args[0] = CUR_Func_read_cvt( I ); \
}
#define DO_WCVTP \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDSL( I, CUR.cvtSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
{ \
ARRAY_BOUND_ERROR; \
} \
} \
else \
CUR_Func_write_cvt( I, args[1] ); \
}
#define DO_WCVTF \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDSL( I, CUR.cvtSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
{ \
ARRAY_BOUND_ERROR; \
} \
} \
else \
CUR.cvt[I] = FT_MulFix( args[1], CUR.tt_metrics.scale ); \
}
#define DO_DEBUG \
CUR.error = FT_THROW( Debug_OpCode );
#define DO_ROUND \
args[0] = CUR_Func_round( \
args[0], \
CUR.tt_metrics.compensations[CUR.opcode - 0x68] );
#define DO_NROUND \
args[0] = ROUND_None( args[0], \
CUR.tt_metrics.compensations[CUR.opcode - 0x6C] );
#define DO_MAX \
if ( args[1] > args[0] ) \
args[0] = args[1];
#define DO_MIN \
if ( args[1] < args[0] ) \
args[0] = args[1];
#ifndef TT_CONFIG_OPTION_INTERPRETER_SWITCH
#undef ARRAY_BOUND_ERROR
#define ARRAY_BOUND_ERROR \
{ \
CUR.error = FT_THROW( Invalid_Reference ); \
return; \
}
/*************************************************************************/
/* */
/* SVTCA[a]: Set (F and P) Vectors to Coordinate Axis */
/* Opcode range: 0x00-0x01 */
/* Stack: --> */
/* */
static void
Ins_SVTCA( INS_ARG )
{
DO_SVTCA
}
/*************************************************************************/
/* */
/* SPVTCA[a]: Set PVector to Coordinate Axis */
/* Opcode range: 0x02-0x03 */
/* Stack: --> */
/* */
static void
Ins_SPVTCA( INS_ARG )
{
DO_SPVTCA
}
/*************************************************************************/
/* */
/* SFVTCA[a]: Set FVector to Coordinate Axis */
/* Opcode range: 0x04-0x05 */
/* Stack: --> */
/* */
static void
Ins_SFVTCA( INS_ARG )
{
DO_SFVTCA
}
/*************************************************************************/
/* */
/* SPVTL[a]: Set PVector To Line */
/* Opcode range: 0x06-0x07 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_SPVTL( INS_ARG )
{
DO_SPVTL
}
/*************************************************************************/
/* */
/* SFVTL[a]: Set FVector To Line */
/* Opcode range: 0x08-0x09 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_SFVTL( INS_ARG )
{
DO_SFVTL
}
/*************************************************************************/
/* */
/* SFVTPV[]: Set FVector To PVector */
/* Opcode range: 0x0E */
/* Stack: --> */
/* */
static void
Ins_SFVTPV( INS_ARG )
{
DO_SFVTPV
}
/*************************************************************************/
/* */
/* SPVFS[]: Set PVector From Stack */
/* Opcode range: 0x0A */
/* Stack: f2.14 f2.14 --> */
/* */
static void
Ins_SPVFS( INS_ARG )
{
DO_SPVFS
}
/*************************************************************************/
/* */
/* SFVFS[]: Set FVector From Stack */
/* Opcode range: 0x0B */
/* Stack: f2.14 f2.14 --> */
/* */
static void
Ins_SFVFS( INS_ARG )
{
DO_SFVFS
}
/*************************************************************************/
/* */
/* GPV[]: Get Projection Vector */
/* Opcode range: 0x0C */
/* Stack: ef2.14 --> ef2.14 */
/* */
static void
Ins_GPV( INS_ARG )
{
DO_GPV
}
/*************************************************************************/
/* GFV[]: Get Freedom Vector */
/* Opcode range: 0x0D */
/* Stack: ef2.14 --> ef2.14 */
/* */
static void
Ins_GFV( INS_ARG )
{
DO_GFV
}
/*************************************************************************/
/* */
/* SRP0[]: Set Reference Point 0 */
/* Opcode range: 0x10 */
/* Stack: uint32 --> */
/* */
static void
Ins_SRP0( INS_ARG )
{
DO_SRP0
}
/*************************************************************************/
/* */
/* SRP1[]: Set Reference Point 1 */
/* Opcode range: 0x11 */
/* Stack: uint32 --> */
/* */
static void
Ins_SRP1( INS_ARG )
{
DO_SRP1
}
/*************************************************************************/
/* */
/* SRP2[]: Set Reference Point 2 */
/* Opcode range: 0x12 */
/* Stack: uint32 --> */
/* */
static void
Ins_SRP2( INS_ARG )
{
DO_SRP2
}
/*************************************************************************/
/* */
/* RTHG[]: Round To Half Grid */
/* Opcode range: 0x19 */
/* Stack: --> */
/* */
static void
Ins_RTHG( INS_ARG )
{
DO_RTHG
}
/*************************************************************************/
/* */
/* RTG[]: Round To Grid */
/* Opcode range: 0x18 */
/* Stack: --> */
/* */
static void
Ins_RTG( INS_ARG )
{
DO_RTG
}
/*************************************************************************/
/* RTDG[]: Round To Double Grid */
/* Opcode range: 0x3D */
/* Stack: --> */
/* */
static void
Ins_RTDG( INS_ARG )
{
DO_RTDG
}
/*************************************************************************/
/* RUTG[]: Round Up To Grid */
/* Opcode range: 0x7C */
/* Stack: --> */
/* */
static void
Ins_RUTG( INS_ARG )
{
DO_RUTG
}
/*************************************************************************/
/* */
/* RDTG[]: Round Down To Grid */
/* Opcode range: 0x7D */
/* Stack: --> */
/* */
static void
Ins_RDTG( INS_ARG )
{
DO_RDTG
}
/*************************************************************************/
/* */
/* ROFF[]: Round OFF */
/* Opcode range: 0x7A */
/* Stack: --> */
/* */
static void
Ins_ROFF( INS_ARG )
{
DO_ROFF
}
/*************************************************************************/
/* */
/* SROUND[]: Super ROUND */
/* Opcode range: 0x76 */
/* Stack: Eint8 --> */
/* */
static void
Ins_SROUND( INS_ARG )
{
DO_SROUND
}
/*************************************************************************/
/* */
/* S45ROUND[]: Super ROUND 45 degrees */
/* Opcode range: 0x77 */
/* Stack: uint32 --> */
/* */
static void
Ins_S45ROUND( INS_ARG )
{
DO_S45ROUND
}
/*************************************************************************/
/* */
/* SLOOP[]: Set LOOP variable */
/* Opcode range: 0x17 */
/* Stack: int32? --> */
/* */
static void
Ins_SLOOP( INS_ARG )
{
DO_SLOOP
}
/*************************************************************************/
/* */
/* SMD[]: Set Minimum Distance */
/* Opcode range: 0x1A */
/* Stack: f26.6 --> */
/* */
static void
Ins_SMD( INS_ARG )
{
DO_SMD
}
/*************************************************************************/
/* */
/* SCVTCI[]: Set Control Value Table Cut In */
/* Opcode range: 0x1D */
/* Stack: f26.6 --> */
/* */
static void
Ins_SCVTCI( INS_ARG )
{
DO_SCVTCI
}
/*************************************************************************/
/* */
/* SSWCI[]: Set Single Width Cut In */
/* Opcode range: 0x1E */
/* Stack: f26.6 --> */
/* */
static void
Ins_SSWCI( INS_ARG )
{
DO_SSWCI
}
/*************************************************************************/
/* */
/* SSW[]: Set Single Width */
/* Opcode range: 0x1F */
/* Stack: int32? --> */
/* */
static void
Ins_SSW( INS_ARG )
{
DO_SSW
}
/*************************************************************************/
/* */
/* FLIPON[]: Set auto-FLIP to ON */
/* Opcode range: 0x4D */
/* Stack: --> */
/* */
static void
Ins_FLIPON( INS_ARG )
{
DO_FLIPON
}
/*************************************************************************/
/* */
/* FLIPOFF[]: Set auto-FLIP to OFF */
/* Opcode range: 0x4E */
/* Stack: --> */
/* */
static void
Ins_FLIPOFF( INS_ARG )
{
DO_FLIPOFF
}
/*************************************************************************/
/* */
/* SANGW[]: Set ANGle Weight */
/* Opcode range: 0x7E */
/* Stack: uint32 --> */
/* */
static void
Ins_SANGW( INS_ARG )
{
/* instruction not supported anymore */
}
/*************************************************************************/
/* */
/* SDB[]: Set Delta Base */
/* Opcode range: 0x5E */
/* Stack: uint32 --> */
/* */
static void
Ins_SDB( INS_ARG )
{
DO_SDB
}
/*************************************************************************/
/* */
/* SDS[]: Set Delta Shift */
/* Opcode range: 0x5F */
/* Stack: uint32 --> */
/* */
static void
Ins_SDS( INS_ARG )
{
DO_SDS
}
/*************************************************************************/
/* */
/* MPPEM[]: Measure Pixel Per EM */
/* Opcode range: 0x4B */
/* Stack: --> Euint16 */
/* */
static void
Ins_MPPEM( INS_ARG )
{
DO_MPPEM
}
/*************************************************************************/
/* */
/* MPS[]: Measure Point Size */
/* Opcode range: 0x4C */
/* Stack: --> Euint16 */
/* */
static void
Ins_MPS( INS_ARG )
{
DO_MPS
}
/*************************************************************************/
/* */
/* DUP[]: DUPlicate the top stack's element */
/* Opcode range: 0x20 */
/* Stack: StkElt --> StkElt StkElt */
/* */
static void
Ins_DUP( INS_ARG )
{
DO_DUP
}
/*************************************************************************/
/* */
/* POP[]: POP the stack's top element */
/* Opcode range: 0x21 */
/* Stack: StkElt --> */
/* */
static void
Ins_POP( INS_ARG )
{
/* nothing to do */
}
/*************************************************************************/
/* */
/* CLEAR[]: CLEAR the entire stack */
/* Opcode range: 0x22 */
/* Stack: StkElt... --> */
/* */
static void
Ins_CLEAR( INS_ARG )
{
DO_CLEAR
}
/*************************************************************************/
/* */
/* SWAP[]: SWAP the stack's top two elements */
/* Opcode range: 0x23 */
/* Stack: 2 * StkElt --> 2 * StkElt */
/* */
static void
Ins_SWAP( INS_ARG )
{
DO_SWAP
}
/*************************************************************************/
/* */
/* DEPTH[]: return the stack DEPTH */
/* Opcode range: 0x24 */
/* Stack: --> uint32 */
/* */
static void
Ins_DEPTH( INS_ARG )
{
DO_DEPTH
}
/*************************************************************************/
/* */
/* CINDEX[]: Copy INDEXed element */
/* Opcode range: 0x25 */
/* Stack: int32 --> StkElt */
/* */
static void
Ins_CINDEX( INS_ARG )
{
DO_CINDEX
}
/*************************************************************************/
/* */
/* EIF[]: End IF */
/* Opcode range: 0x59 */
/* Stack: --> */
/* */
static void
Ins_EIF( INS_ARG )
{
/* nothing to do */
}
/*************************************************************************/
/* */
/* JROT[]: Jump Relative On True */
/* Opcode range: 0x78 */
/* Stack: StkElt int32 --> */
/* */
static void
Ins_JROT( INS_ARG )
{
DO_JROT
}
/*************************************************************************/
/* */
/* JMPR[]: JuMP Relative */
/* Opcode range: 0x1C */
/* Stack: int32 --> */
/* */
static void
Ins_JMPR( INS_ARG )
{
DO_JMPR
}
/*************************************************************************/
/* */
/* JROF[]: Jump Relative On False */
/* Opcode range: 0x79 */
/* Stack: StkElt int32 --> */
/* */
static void
Ins_JROF( INS_ARG )
{
DO_JROF
}
/*************************************************************************/
/* */
/* LT[]: Less Than */
/* Opcode range: 0x50 */
/* Stack: int32? int32? --> bool */
/* */
static void
Ins_LT( INS_ARG )
{
DO_LT
}
/*************************************************************************/
/* */
/* LTEQ[]: Less Than or EQual */
/* Opcode range: 0x51 */
/* Stack: int32? int32? --> bool */
/* */
static void
Ins_LTEQ( INS_ARG )
{
DO_LTEQ
}
/*************************************************************************/
/* */
/* GT[]: Greater Than */
/* Opcode range: 0x52 */
/* Stack: int32? int32? --> bool */
/* */
static void
Ins_GT( INS_ARG )
{
DO_GT
}
/*************************************************************************/
/* */
/* GTEQ[]: Greater Than or EQual */
/* Opcode range: 0x53 */
/* Stack: int32? int32? --> bool */
/* */
static void
Ins_GTEQ( INS_ARG )
{
DO_GTEQ
}
/*************************************************************************/
/* */
/* EQ[]: EQual */
/* Opcode range: 0x54 */
/* Stack: StkElt StkElt --> bool */
/* */
static void
Ins_EQ( INS_ARG )
{
DO_EQ
}
/*************************************************************************/
/* */
/* NEQ[]: Not EQual */
/* Opcode range: 0x55 */
/* Stack: StkElt StkElt --> bool */
/* */
static void
Ins_NEQ( INS_ARG )
{
DO_NEQ
}
/*************************************************************************/
/* */
/* ODD[]: Is ODD */
/* Opcode range: 0x56 */
/* Stack: f26.6 --> bool */
/* */
static void
Ins_ODD( INS_ARG )
{
DO_ODD
}
/*************************************************************************/
/* */
/* EVEN[]: Is EVEN */
/* Opcode range: 0x57 */
/* Stack: f26.6 --> bool */
/* */
static void
Ins_EVEN( INS_ARG )
{
DO_EVEN
}
/*************************************************************************/
/* */
/* AND[]: logical AND */
/* Opcode range: 0x5A */
/* Stack: uint32 uint32 --> uint32 */
/* */
static void
Ins_AND( INS_ARG )
{
DO_AND
}
/*************************************************************************/
/* */
/* OR[]: logical OR */
/* Opcode range: 0x5B */
/* Stack: uint32 uint32 --> uint32 */
/* */
static void
Ins_OR( INS_ARG )
{
DO_OR
}
/*************************************************************************/
/* */
/* NOT[]: logical NOT */
/* Opcode range: 0x5C */
/* Stack: StkElt --> uint32 */
/* */
static void
Ins_NOT( INS_ARG )
{
DO_NOT
}
/*************************************************************************/
/* */
/* ADD[]: ADD */
/* Opcode range: 0x60 */
/* Stack: f26.6 f26.6 --> f26.6 */
/* */
static void
Ins_ADD( INS_ARG )
{
DO_ADD
}
/*************************************************************************/
/* */
/* SUB[]: SUBtract */
/* Opcode range: 0x61 */
/* Stack: f26.6 f26.6 --> f26.6 */
/* */
static void
Ins_SUB( INS_ARG )
{
DO_SUB
}
/*************************************************************************/
/* */
/* DIV[]: DIVide */
/* Opcode range: 0x62 */
/* Stack: f26.6 f26.6 --> f26.6 */
/* */
static void
Ins_DIV( INS_ARG )
{
DO_DIV
}
/*************************************************************************/
/* */
/* MUL[]: MULtiply */
/* Opcode range: 0x63 */
/* Stack: f26.6 f26.6 --> f26.6 */
/* */
static void
Ins_MUL( INS_ARG )
{
DO_MUL
}
/*************************************************************************/
/* */
/* ABS[]: ABSolute value */
/* Opcode range: 0x64 */
/* Stack: f26.6 --> f26.6 */
/* */
static void
Ins_ABS( INS_ARG )
{
DO_ABS
}
/*************************************************************************/
/* */
/* NEG[]: NEGate */
/* Opcode range: 0x65 */
/* Stack: f26.6 --> f26.6 */
/* */
static void
Ins_NEG( INS_ARG )
{
DO_NEG
}
/*************************************************************************/
/* */
/* FLOOR[]: FLOOR */
/* Opcode range: 0x66 */
/* Stack: f26.6 --> f26.6 */
/* */
static void
Ins_FLOOR( INS_ARG )
{
DO_FLOOR
}
/*************************************************************************/
/* */
/* CEILING[]: CEILING */
/* Opcode range: 0x67 */
/* Stack: f26.6 --> f26.6 */
/* */
static void
Ins_CEILING( INS_ARG )
{
DO_CEILING
}
/*************************************************************************/
/* */
/* RS[]: Read Store */
/* Opcode range: 0x43 */
/* Stack: uint32 --> uint32 */
/* */
static void
Ins_RS( INS_ARG )
{
DO_RS
}
/*************************************************************************/
/* */
/* WS[]: Write Store */
/* Opcode range: 0x42 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_WS( INS_ARG )
{
DO_WS
}
/*************************************************************************/
/* */
/* WCVTP[]: Write CVT in Pixel units */
/* Opcode range: 0x44 */
/* Stack: f26.6 uint32 --> */
/* */
static void
Ins_WCVTP( INS_ARG )
{
DO_WCVTP
}
/*************************************************************************/
/* */
/* WCVTF[]: Write CVT in Funits */
/* Opcode range: 0x70 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_WCVTF( INS_ARG )
{
DO_WCVTF
}
/*************************************************************************/
/* */
/* RCVT[]: Read CVT */
/* Opcode range: 0x45 */
/* Stack: uint32 --> f26.6 */
/* */
static void
Ins_RCVT( INS_ARG )
{
DO_RCVT
}
/*************************************************************************/
/* */
/* AA[]: Adjust Angle */
/* Opcode range: 0x7F */
/* Stack: uint32 --> */
/* */
static void
Ins_AA( INS_ARG )
{
/* intentionally no longer supported */
}
/*************************************************************************/
/* */
/* DEBUG[]: DEBUG. Unsupported. */
/* Opcode range: 0x4F */
/* Stack: uint32 --> */
/* */
/* Note: The original instruction pops a value from the stack. */
/* */
static void
Ins_DEBUG( INS_ARG )
{
DO_DEBUG
}
/*************************************************************************/
/* */
/* ROUND[ab]: ROUND value */
/* Opcode range: 0x68-0x6B */
/* Stack: f26.6 --> f26.6 */
/* */
static void
Ins_ROUND( INS_ARG )
{
DO_ROUND
}
/*************************************************************************/
/* */
/* NROUND[ab]: No ROUNDing of value */
/* Opcode range: 0x6C-0x6F */
/* Stack: f26.6 --> f26.6 */
/* */
static void
Ins_NROUND( INS_ARG )
{
DO_NROUND
}
/*************************************************************************/
/* */
/* MAX[]: MAXimum */
/* Opcode range: 0x68 */
/* Stack: int32? int32? --> int32 */
/* */
static void
Ins_MAX( INS_ARG )
{
DO_MAX
}
/*************************************************************************/
/* */
/* MIN[]: MINimum */
/* Opcode range: 0x69 */
/* Stack: int32? int32? --> int32 */
/* */
static void
Ins_MIN( INS_ARG )
{
DO_MIN
}
#endif /* !TT_CONFIG_OPTION_INTERPRETER_SWITCH */
/*************************************************************************/
/* */
/* The following functions are called as is within the switch statement. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* MINDEX[]: Move INDEXed element */
/* Opcode range: 0x26 */
/* Stack: int32? --> StkElt */
/* */
static void
Ins_MINDEX( INS_ARG )
{
FT_Long L, K;
L = args[0];
if ( L <= 0 || L > CUR.args )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
}
else
{
K = CUR.stack[CUR.args - L];
FT_ARRAY_MOVE( &CUR.stack[CUR.args - L ],
&CUR.stack[CUR.args - L + 1],
( L - 1 ) );
CUR.stack[CUR.args - 1] = K;
}
}
/*************************************************************************/
/* */
/* ROLL[]: ROLL top three elements */
/* Opcode range: 0x8A */
/* Stack: 3 * StkElt --> 3 * StkElt */
/* */
static void
Ins_ROLL( INS_ARG )
{
FT_Long A, B, C;
FT_UNUSED_EXEC;
A = args[2];
B = args[1];
C = args[0];
args[2] = C;
args[1] = A;
args[0] = B;
}
/*************************************************************************/
/* */
/* MANAGING THE FLOW OF CONTROL */
/* */
/* Instructions appear in the specification's order. */
/* */
/*************************************************************************/
static FT_Bool
SkipCode( EXEC_OP )
{
CUR.IP += CUR.length;
if ( CUR.IP < CUR.codeSize )
{
CUR.opcode = CUR.code[CUR.IP];
CUR.length = opcode_length[CUR.opcode];
if ( CUR.length < 0 )
{
if ( CUR.IP + 1 >= CUR.codeSize )
goto Fail_Overflow;
CUR.length = 2 - CUR.length * CUR.code[CUR.IP + 1];
}
if ( CUR.IP + CUR.length <= CUR.codeSize )
return SUCCESS;
}
Fail_Overflow:
CUR.error = FT_THROW( Code_Overflow );
return FAILURE;
}
/*************************************************************************/
/* */
/* IF[]: IF test */
/* Opcode range: 0x58 */
/* Stack: StkElt --> */
/* */
static void
Ins_IF( INS_ARG )
{
FT_Int nIfs;
FT_Bool Out;
if ( args[0] != 0 )
return;
nIfs = 1;
Out = 0;
do
{
if ( SKIP_Code() == FAILURE )
return;
switch ( CUR.opcode )
{
case 0x58: /* IF */
nIfs++;
break;
case 0x1B: /* ELSE */
Out = FT_BOOL( nIfs == 1 );
break;
case 0x59: /* EIF */
nIfs--;
Out = FT_BOOL( nIfs == 0 );
break;
}
} while ( Out == 0 );
}
/*************************************************************************/
/* */
/* ELSE[]: ELSE */
/* Opcode range: 0x1B */
/* Stack: --> */
/* */
static void
Ins_ELSE( INS_ARG )
{
FT_Int nIfs;
FT_UNUSED_ARG;
nIfs = 1;
do
{
if ( SKIP_Code() == FAILURE )
return;
switch ( CUR.opcode )
{
case 0x58: /* IF */
nIfs++;
break;
case 0x59: /* EIF */
nIfs--;
break;
}
} while ( nIfs != 0 );
}
/*************************************************************************/
/* */
/* DEFINING AND USING FUNCTIONS AND INSTRUCTIONS */
/* */
/* Instructions appear in the specification's order. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* FDEF[]: Function DEFinition */
/* Opcode range: 0x2C */
/* Stack: uint32 --> */
/* */
static void
Ins_FDEF( INS_ARG )
{
FT_ULong n;
TT_DefRecord* rec;
TT_DefRecord* limit;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* arguments to opcodes are skipped by `SKIP_Code' */
FT_Byte opcode_pattern[9][12] = {
/* #0 inline delta function 1 */
{
0x4B, /* PPEM */
0x53, /* GTEQ */
0x23, /* SWAP */
0x4B, /* PPEM */
0x51, /* LTEQ */
0x5A, /* AND */
0x58, /* IF */
0x38, /* SHPIX */
0x1B, /* ELSE */
0x21, /* POP */
0x21, /* POP */
0x59 /* EIF */
},
/* #1 inline delta function 2 */
{
0x4B, /* PPEM */
0x54, /* EQ */
0x58, /* IF */
0x38, /* SHPIX */
0x1B, /* ELSE */
0x21, /* POP */
0x21, /* POP */
0x59 /* EIF */
},
/* #2 diagonal stroke function */
{
0x20, /* DUP */
0x20, /* DUP */
0xB0, /* PUSHB_1 */
/* 1 */
0x60, /* ADD */
0x46, /* GC_cur */
0xB0, /* PUSHB_1 */
/* 64 */
0x23, /* SWAP */
0x42 /* WS */
},
/* #3 VacuFormRound function */
{
0x45, /* RCVT */
0x23, /* SWAP */
0x46, /* GC_cur */
0x60, /* ADD */
0x20, /* DUP */
0xB0 /* PUSHB_1 */
/* 38 */
},
/* #4 TTFautohint bytecode (old) */
{
0x20, /* DUP */
0x64, /* ABS */
0xB0, /* PUSHB_1 */
/* 32 */
0x60, /* ADD */
0x66, /* FLOOR */
0x23, /* SWAP */
0xB0 /* PUSHB_1 */
},
/* #5 spacing function 1 */
{
0x01, /* SVTCA_x */
0xB0, /* PUSHB_1 */
/* 24 */
0x43, /* RS */
0x58 /* IF */
},
/* #6 spacing function 2 */
{
0x01, /* SVTCA_x */
0x18, /* RTG */
0xB0, /* PUSHB_1 */
/* 24 */
0x43, /* RS */
0x58 /* IF */
},
/* #7 TypeMan Talk DiagEndCtrl function */
{
0x01, /* SVTCA_x */
0x20, /* DUP */
0xB0, /* PUSHB_1 */
/* 3 */
0x25, /* CINDEX */
},
/* #8 TypeMan Talk Align */
{
0x06, /* SPVTL */
0x7D, /* RDTG */
},
};
FT_UShort opcode_patterns = 9;
FT_UShort opcode_pointer[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
FT_UShort opcode_size[9] = { 12, 8, 8, 6, 7, 4, 5, 4, 2 };
FT_UShort i;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* some font programs are broken enough to redefine functions! */
/* We will then parse the current table. */
rec = CUR.FDefs;
limit = rec + CUR.numFDefs;
n = args[0];
for ( ; rec < limit; rec++ )
{
if ( rec->opc == n )
break;
}
if ( rec == limit )
{
/* check that there is enough room for new functions */
if ( CUR.numFDefs >= CUR.maxFDefs )
{
CUR.error = FT_THROW( Too_Many_Function_Defs );
return;
}
CUR.numFDefs++;
}
/* Although FDEF takes unsigned 32-bit integer, */
/* func # must be within unsigned 16-bit integer */
if ( n > 0xFFFFU )
{
CUR.error = FT_THROW( Too_Many_Function_Defs );
return;
}
rec->range = CUR.curRange;
rec->opc = (FT_UInt16)n;
rec->start = CUR.IP + 1;
rec->active = TRUE;
rec->inline_delta = FALSE;
rec->sph_fdef_flags = 0x0000;
if ( n > CUR.maxFunc )
CUR.maxFunc = (FT_UInt16)n;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* We don't know for sure these are typeman functions, */
/* however they are only active when RS 22 is called */
if ( n >= 64 && n <= 66 )
rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_STROKES;
#endif
/* Now skip the whole function definition. */
/* We don't allow nested IDEFS & FDEFs. */
while ( SKIP_Code() == SUCCESS )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING )
{
for ( i = 0; i < opcode_patterns; i++ )
{
if ( opcode_pointer[i] < opcode_size[i] &&
CUR.opcode == opcode_pattern[i][opcode_pointer[i]] )
{
opcode_pointer[i] += 1;
if ( opcode_pointer[i] == opcode_size[i] )
{
FT_TRACE7(( "sph: Function %d, opcode ptrn: %d, %s %s\n",
i, n,
CUR.face->root.family_name,
CUR.face->root.style_name ));
switch ( i )
{
case 0:
rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_1;
break;
case 1:
rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_2;
CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_2;
break;
case 2:
switch ( n )
{
/* needs to be implemented still */
case 58:
rec->sph_fdef_flags |= SPH_FDEF_DIAGONAL_STROKE;
CUR.face->sph_found_func_flags |= SPH_FDEF_DIAGONAL_STROKE;
}
break;
case 3:
switch ( n )
{
case 0:
rec->sph_fdef_flags |= SPH_FDEF_VACUFORM_ROUND_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_VACUFORM_ROUND_1;
}
break;
case 4:
/* probably not necessary to detect anymore */
rec->sph_fdef_flags |= SPH_FDEF_TTFAUTOHINT_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_TTFAUTOHINT_1;
break;
case 5:
switch ( n )
{
case 0:
case 1:
case 2:
case 4:
case 7:
case 8:
rec->sph_fdef_flags |= SPH_FDEF_SPACING_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_1;
}
break;
case 6:
switch ( n )
{
case 0:
case 1:
case 2:
case 4:
case 7:
case 8:
rec->sph_fdef_flags |= SPH_FDEF_SPACING_2;
CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_2;
}
break;
case 7:
rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
CUR.face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
break;
case 8:
#if 0
rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
CUR.face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
#endif
break;
}
opcode_pointer[i] = 0;
}
}
else
opcode_pointer[i] = 0;
}
/* Set sph_compatibility_mode only when deltas are detected */
CUR.face->sph_compatibility_mode =
( ( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_1 ) |
( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_2 ) );
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
switch ( CUR.opcode )
{
case 0x89: /* IDEF */
case 0x2C: /* FDEF */
CUR.error = FT_THROW( Nested_DEFS );
return;
case 0x2D: /* ENDF */
rec->end = CUR.IP;
return;
}
}
}
/*************************************************************************/
/* */
/* ENDF[]: END Function definition */
/* Opcode range: 0x2D */
/* Stack: --> */
/* */
static void
Ins_ENDF( INS_ARG )
{
TT_CallRec* pRec;
FT_UNUSED_ARG;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
CUR.sph_in_func_flags = 0x0000;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
if ( CUR.callTop <= 0 ) /* We encountered an ENDF without a call */
{
CUR.error = FT_THROW( ENDF_In_Exec_Stream );
return;
}
CUR.callTop--;
pRec = &CUR.callStack[CUR.callTop];
pRec->Cur_Count--;
CUR.step_ins = FALSE;
if ( pRec->Cur_Count > 0 )
{
CUR.callTop++;
CUR.IP = pRec->Cur_Restart;
}
else
/* Loop through the current function */
INS_Goto_CodeRange( pRec->Caller_Range,
pRec->Caller_IP );
/* Exit the current call frame. */
/* NOTE: If the last instruction of a program is a */
/* CALL or LOOPCALL, the return address is */
/* always out of the code range. This is a */
/* valid address, and it is why we do not test */
/* the result of Ins_Goto_CodeRange() here! */
}
/*************************************************************************/
/* */
/* CALL[]: CALL function */
/* Opcode range: 0x2B */
/* Stack: uint32? --> */
/* */
static void
Ins_CALL( INS_ARG )
{
FT_ULong F;
TT_CallRec* pCrec;
TT_DefRecord* def;
/* first of all, check the index */
F = args[0];
if ( BOUNDSL( F, CUR.maxFunc + 1 ) )
goto Fail;
/* Except for some old Apple fonts, all functions in a TrueType */
/* font are defined in increasing order, starting from 0. This */
/* means that we normally have */
/* */
/* CUR.maxFunc+1 == CUR.numFDefs */
/* CUR.FDefs[n].opc == n for n in 0..CUR.maxFunc */
/* */
/* If this isn't true, we need to look up the function table. */
def = CUR.FDefs + F;
if ( CUR.maxFunc + 1 != CUR.numFDefs || def->opc != F )
{
/* look up the FDefs table */
TT_DefRecord* limit;
def = CUR.FDefs;
limit = def + CUR.numFDefs;
while ( def < limit && def->opc != F )
def++;
if ( def == limit )
goto Fail;
}
/* check that the function is active */
if ( !def->active )
goto Fail;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
( ( CUR.iup_called &&
( CUR.sph_tweak_flags & SPH_TWEAK_NO_CALL_AFTER_IUP ) ) ||
( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) ) )
goto Fail;
else
CUR.sph_in_func_flags = def->sph_fdef_flags;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* check the call stack */
if ( CUR.callTop >= CUR.callSize )
{
CUR.error = FT_THROW( Stack_Overflow );
return;
}
pCrec = CUR.callStack + CUR.callTop;
pCrec->Caller_Range = CUR.curRange;
pCrec->Caller_IP = CUR.IP + 1;
pCrec->Cur_Count = 1;
pCrec->Cur_Restart = def->start;
pCrec->Cur_End = def->end;
CUR.callTop++;
INS_Goto_CodeRange( def->range,
def->start );
CUR.step_ins = FALSE;
return;
Fail:
CUR.error = FT_THROW( Invalid_Reference );
}
/*************************************************************************/
/* */
/* LOOPCALL[]: LOOP and CALL function */
/* Opcode range: 0x2A */
/* Stack: uint32? Eint16? --> */
/* */
static void
Ins_LOOPCALL( INS_ARG )
{
FT_ULong F;
TT_CallRec* pCrec;
TT_DefRecord* def;
/* first of all, check the index */
F = args[1];
if ( BOUNDSL( F, CUR.maxFunc + 1 ) )
goto Fail;
/* Except for some old Apple fonts, all functions in a TrueType */
/* font are defined in increasing order, starting from 0. This */
/* means that we normally have */
/* */
/* CUR.maxFunc+1 == CUR.numFDefs */
/* CUR.FDefs[n].opc == n for n in 0..CUR.maxFunc */
/* */
/* If this isn't true, we need to look up the function table. */
def = CUR.FDefs + F;
if ( CUR.maxFunc + 1 != CUR.numFDefs || def->opc != F )
{
/* look up the FDefs table */
TT_DefRecord* limit;
def = CUR.FDefs;
limit = def + CUR.numFDefs;
while ( def < limit && def->opc != F )
def++;
if ( def == limit )
goto Fail;
}
/* check that the function is active */
if ( !def->active )
goto Fail;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) )
goto Fail;
else
CUR.sph_in_func_flags = def->sph_fdef_flags;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* check stack */
if ( CUR.callTop >= CUR.callSize )
{
CUR.error = FT_THROW( Stack_Overflow );
return;
}
if ( args[0] > 0 )
{
pCrec = CUR.callStack + CUR.callTop;
pCrec->Caller_Range = CUR.curRange;
pCrec->Caller_IP = CUR.IP + 1;
pCrec->Cur_Count = (FT_Int)args[0];
pCrec->Cur_Restart = def->start;
pCrec->Cur_End = def->end;
CUR.callTop++;
INS_Goto_CodeRange( def->range, def->start );
CUR.step_ins = FALSE;
}
return;
Fail:
CUR.error = FT_THROW( Invalid_Reference );
}
/*************************************************************************/
/* */
/* IDEF[]: Instruction DEFinition */
/* Opcode range: 0x89 */
/* Stack: Eint8 --> */
/* */
static void
Ins_IDEF( INS_ARG )
{
TT_DefRecord* def;
TT_DefRecord* limit;
/* First of all, look for the same function in our table */
def = CUR.IDefs;
limit = def + CUR.numIDefs;
for ( ; def < limit; def++ )
if ( def->opc == (FT_ULong)args[0] )
break;
if ( def == limit )
{
/* check that there is enough room for a new instruction */
if ( CUR.numIDefs >= CUR.maxIDefs )
{
CUR.error = FT_THROW( Too_Many_Instruction_Defs );
return;
}
CUR.numIDefs++;
}
/* opcode must be unsigned 8-bit integer */
if ( 0 > args[0] || args[0] > 0x00FF )
{
CUR.error = FT_THROW( Too_Many_Instruction_Defs );
return;
}
def->opc = (FT_Byte)args[0];
def->start = CUR.IP + 1;
def->range = CUR.curRange;
def->active = TRUE;
if ( (FT_ULong)args[0] > CUR.maxIns )
CUR.maxIns = (FT_Byte)args[0];
/* Now skip the whole function definition. */
/* We don't allow nested IDEFs & FDEFs. */
while ( SKIP_Code() == SUCCESS )
{
switch ( CUR.opcode )
{
case 0x89: /* IDEF */
case 0x2C: /* FDEF */
CUR.error = FT_THROW( Nested_DEFS );
return;
case 0x2D: /* ENDF */
return;
}
}
}
/*************************************************************************/
/* */
/* PUSHING DATA ONTO THE INTERPRETER STACK */
/* */
/* Instructions appear in the specification's order. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* NPUSHB[]: PUSH N Bytes */
/* Opcode range: 0x40 */
/* Stack: --> uint32... */
/* */
static void
Ins_NPUSHB( INS_ARG )
{
FT_UShort L, K;
L = (FT_UShort)CUR.code[CUR.IP + 1];
if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) )
{
CUR.error = FT_THROW( Stack_Overflow );
return;
}
for ( K = 1; K <= L; K++ )
args[K - 1] = CUR.code[CUR.IP + K + 1];
CUR.new_top += L;
}
/*************************************************************************/
/* */
/* NPUSHW[]: PUSH N Words */
/* Opcode range: 0x41 */
/* Stack: --> int32... */
/* */
static void
Ins_NPUSHW( INS_ARG )
{
FT_UShort L, K;
L = (FT_UShort)CUR.code[CUR.IP + 1];
if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) )
{
CUR.error = FT_THROW( Stack_Overflow );
return;
}
CUR.IP += 2;
for ( K = 0; K < L; K++ )
args[K] = GET_ShortIns();
CUR.step_ins = FALSE;
CUR.new_top += L;
}
/*************************************************************************/
/* */
/* PUSHB[abc]: PUSH Bytes */
/* Opcode range: 0xB0-0xB7 */
/* Stack: --> uint32... */
/* */
static void
Ins_PUSHB( INS_ARG )
{
FT_UShort L, K;
L = (FT_UShort)( CUR.opcode - 0xB0 + 1 );
if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) )
{
CUR.error = FT_THROW( Stack_Overflow );
return;
}
for ( K = 1; K <= L; K++ )
args[K - 1] = CUR.code[CUR.IP + K];
}
/*************************************************************************/
/* */
/* PUSHW[abc]: PUSH Words */
/* Opcode range: 0xB8-0xBF */
/* Stack: --> int32... */
/* */
static void
Ins_PUSHW( INS_ARG )
{
FT_UShort L, K;
L = (FT_UShort)( CUR.opcode - 0xB8 + 1 );
if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) )
{
CUR.error = FT_THROW( Stack_Overflow );
return;
}
CUR.IP++;
for ( K = 0; K < L; K++ )
args[K] = GET_ShortIns();
CUR.step_ins = FALSE;
}
/*************************************************************************/
/* */
/* MANAGING THE GRAPHICS STATE */
/* */
/* Instructions appear in the specs' order. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* GC[a]: Get Coordinate projected onto */
/* Opcode range: 0x46-0x47 */
/* Stack: uint32 --> f26.6 */
/* */
/* XXX: UNDOCUMENTED: Measures from the original glyph must be taken */
/* along the dual projection vector! */
/* */
static void
Ins_GC( INS_ARG )
{
FT_ULong L;
FT_F26Dot6 R;
L = (FT_ULong)args[0];
if ( BOUNDSL( L, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
R = 0;
}
else
{
if ( CUR.opcode & 1 )
R = CUR_fast_dualproj( &CUR.zp2.org[L] );
else
R = CUR_fast_project( &CUR.zp2.cur[L] );
}
args[0] = R;
}
/*************************************************************************/
/* */
/* SCFS[]: Set Coordinate From Stack */
/* Opcode range: 0x48 */
/* Stack: f26.6 uint32 --> */
/* */
/* Formula: */
/* */
/* OA := OA + ( value - OA.p )/( f.p ) * f */
/* */
static void
Ins_SCFS( INS_ARG )
{
FT_Long K;
FT_UShort L;
L = (FT_UShort)args[0];
if ( BOUNDS( L, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
K = CUR_fast_project( &CUR.zp2.cur[L] );
CUR_Func_move( &CUR.zp2, L, args[1] - K );
/* UNDOCUMENTED! The MS rasterizer does that with */
/* twilight points (confirmed by Greg Hitchcock) */
if ( CUR.GS.gep2 == 0 )
CUR.zp2.org[L] = CUR.zp2.cur[L];
}
/*************************************************************************/
/* */
/* MD[a]: Measure Distance */
/* Opcode range: 0x49-0x4A */
/* Stack: uint32 uint32 --> f26.6 */
/* */
/* XXX: UNDOCUMENTED: Measure taken in the original glyph must be along */
/* the dual projection vector. */
/* */
/* XXX: UNDOCUMENTED: Flag attributes are inverted! */
/* 0 => measure distance in original outline */
/* 1 => measure distance in grid-fitted outline */
/* */
/* XXX: UNDOCUMENTED: `zp0 - zp1', and not `zp2 - zp1! */
/* */
static void
Ins_MD( INS_ARG )
{
FT_UShort K, L;
FT_F26Dot6 D;
K = (FT_UShort)args[1];
L = (FT_UShort)args[0];
if ( BOUNDS( L, CUR.zp0.n_points ) ||
BOUNDS( K, CUR.zp1.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
D = 0;
}
else
{
if ( CUR.opcode & 1 )
D = CUR_Func_project( CUR.zp0.cur + L, CUR.zp1.cur + K );
else
{
/* XXX: UNDOCUMENTED: twilight zone special case */
if ( CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 )
{
FT_Vector* vec1 = CUR.zp0.org + L;
FT_Vector* vec2 = CUR.zp1.org + K;
D = CUR_Func_dualproj( vec1, vec2 );
}
else
{
FT_Vector* vec1 = CUR.zp0.orus + L;
FT_Vector* vec2 = CUR.zp1.orus + K;
if ( CUR.metrics.x_scale == CUR.metrics.y_scale )
{
/* this should be faster */
D = CUR_Func_dualproj( vec1, vec2 );
D = FT_MulFix( D, CUR.metrics.x_scale );
}
else
{
FT_Vector vec;
vec.x = FT_MulFix( vec1->x - vec2->x, CUR.metrics.x_scale );
vec.y = FT_MulFix( vec1->y - vec2->y, CUR.metrics.y_scale );
D = CUR_fast_dualproj( &vec );
}
}
}
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* Disable Type 2 Vacuform Rounds - e.g. Arial Narrow */
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode && FT_ABS( D ) == 64 )
D += 1;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
args[0] = D;
}
/*************************************************************************/
/* */
/* SDPVTL[a]: Set Dual PVector to Line */
/* Opcode range: 0x86-0x87 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_SDPVTL( INS_ARG )
{
FT_Long A, B, C;
FT_UShort p1, p2; /* was FT_Int in pas type ERROR */
FT_Int aOpc = CUR.opcode;
p1 = (FT_UShort)args[1];
p2 = (FT_UShort)args[0];
if ( BOUNDS( p2, CUR.zp1.n_points ) ||
BOUNDS( p1, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
{
FT_Vector* v1 = CUR.zp1.org + p2;
FT_Vector* v2 = CUR.zp2.org + p1;
A = v1->x - v2->x;
B = v1->y - v2->y;
/* If v1 == v2, SDPVTL behaves the same as */
/* SVTCA[X], respectively. */
/* */
/* Confirmed by Greg Hitchcock. */
if ( A == 0 && B == 0 )
{
A = 0x4000;
aOpc = 0;
}
}
if ( ( aOpc & 1 ) != 0 )
{
C = B; /* counter clockwise rotation */
B = A;
A = -C;
}
NORMalize( A, B, &CUR.GS.dualVector );
{
FT_Vector* v1 = CUR.zp1.cur + p2;
FT_Vector* v2 = CUR.zp2.cur + p1;
A = v1->x - v2->x;
B = v1->y - v2->y;
if ( A == 0 && B == 0 )
{
A = 0x4000;
aOpc = 0;
}
}
if ( ( aOpc & 1 ) != 0 )
{
C = B; /* counter clockwise rotation */
B = A;
A = -C;
}
NORMalize( A, B, &CUR.GS.projVector );
GUESS_VECTOR( freeVector );
COMPUTE_Funcs();
}
/*************************************************************************/
/* */
/* SZP0[]: Set Zone Pointer 0 */
/* Opcode range: 0x13 */
/* Stack: uint32 --> */
/* */
static void
Ins_SZP0( INS_ARG )
{
switch ( (FT_Int)args[0] )
{
case 0:
CUR.zp0 = CUR.twilight;
break;
case 1:
CUR.zp0 = CUR.pts;
break;
default:
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
CUR.GS.gep0 = (FT_UShort)args[0];
}
/*************************************************************************/
/* */
/* SZP1[]: Set Zone Pointer 1 */
/* Opcode range: 0x14 */
/* Stack: uint32 --> */
/* */
static void
Ins_SZP1( INS_ARG )
{
switch ( (FT_Int)args[0] )
{
case 0:
CUR.zp1 = CUR.twilight;
break;
case 1:
CUR.zp1 = CUR.pts;
break;
default:
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
CUR.GS.gep1 = (FT_UShort)args[0];
}
/*************************************************************************/
/* */
/* SZP2[]: Set Zone Pointer 2 */
/* Opcode range: 0x15 */
/* Stack: uint32 --> */
/* */
static void
Ins_SZP2( INS_ARG )
{
switch ( (FT_Int)args[0] )
{
case 0:
CUR.zp2 = CUR.twilight;
break;
case 1:
CUR.zp2 = CUR.pts;
break;
default:
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
CUR.GS.gep2 = (FT_UShort)args[0];
}
/*************************************************************************/
/* */
/* SZPS[]: Set Zone PointerS */
/* Opcode range: 0x16 */
/* Stack: uint32 --> */
/* */
static void
Ins_SZPS( INS_ARG )
{
switch ( (FT_Int)args[0] )
{
case 0:
CUR.zp0 = CUR.twilight;
break;
case 1:
CUR.zp0 = CUR.pts;
break;
default:
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
CUR.zp1 = CUR.zp0;
CUR.zp2 = CUR.zp0;
CUR.GS.gep0 = (FT_UShort)args[0];
CUR.GS.gep1 = (FT_UShort)args[0];
CUR.GS.gep2 = (FT_UShort)args[0];
}
/*************************************************************************/
/* */
/* INSTCTRL[]: INSTruction ConTRoL */
/* Opcode range: 0x8e */
/* Stack: int32 int32 --> */
/* */
static void
Ins_INSTCTRL( INS_ARG )
{
FT_Long K, L;
K = args[1];
L = args[0];
if ( K < 1 || K > 2 )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
if ( L != 0 )
L = K;
CUR.GS.instruct_control = FT_BOOL(
( (FT_Byte)CUR.GS.instruct_control & ~(FT_Byte)K ) | (FT_Byte)L );
}
/*************************************************************************/
/* */
/* SCANCTRL[]: SCAN ConTRoL */
/* Opcode range: 0x85 */
/* Stack: uint32? --> */
/* */
static void
Ins_SCANCTRL( INS_ARG )
{
FT_Int A;
/* Get Threshold */
A = (FT_Int)( args[0] & 0xFF );
if ( A == 0xFF )
{
CUR.GS.scan_control = TRUE;
return;
}
else if ( A == 0 )
{
CUR.GS.scan_control = FALSE;
return;
}
if ( ( args[0] & 0x100 ) != 0 && CUR.tt_metrics.ppem <= A )
CUR.GS.scan_control = TRUE;
if ( ( args[0] & 0x200 ) != 0 && CUR.tt_metrics.rotated )
CUR.GS.scan_control = TRUE;
if ( ( args[0] & 0x400 ) != 0 && CUR.tt_metrics.stretched )
CUR.GS.scan_control = TRUE;
if ( ( args[0] & 0x800 ) != 0 && CUR.tt_metrics.ppem > A )
CUR.GS.scan_control = FALSE;
if ( ( args[0] & 0x1000 ) != 0 && CUR.tt_metrics.rotated )
CUR.GS.scan_control = FALSE;
if ( ( args[0] & 0x2000 ) != 0 && CUR.tt_metrics.stretched )
CUR.GS.scan_control = FALSE;
}
/*************************************************************************/
/* */
/* SCANTYPE[]: SCAN TYPE */
/* Opcode range: 0x8D */
/* Stack: uint32? --> */
/* */
static void
Ins_SCANTYPE( INS_ARG )
{
if ( args[0] >= 0 )
CUR.GS.scan_type = (FT_Int)args[0];
}
/*************************************************************************/
/* */
/* MANAGING OUTLINES */
/* */
/* Instructions appear in the specification's order. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* FLIPPT[]: FLIP PoinT */
/* Opcode range: 0x80 */
/* Stack: uint32... --> */
/* */
static void
Ins_FLIPPT( INS_ARG )
{
FT_UShort point;
FT_UNUSED_ARG;
if ( CUR.top < CUR.GS.loop )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Too_Few_Arguments );
goto Fail;
}
while ( CUR.GS.loop > 0 )
{
CUR.args--;
point = (FT_UShort)CUR.stack[CUR.args];
if ( BOUNDS( point, CUR.pts.n_points ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = FT_THROW( Invalid_Reference );
return;
}
}
else
CUR.pts.tags[point] ^= FT_CURVE_TAG_ON;
CUR.GS.loop--;
}
Fail:
CUR.GS.loop = 1;
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* FLIPRGON[]: FLIP RanGe ON */
/* Opcode range: 0x81 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_FLIPRGON( INS_ARG )
{
FT_UShort I, K, L;
K = (FT_UShort)args[1];
L = (FT_UShort)args[0];
if ( BOUNDS( K, CUR.pts.n_points ) ||
BOUNDS( L, CUR.pts.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
for ( I = L; I <= K; I++ )
CUR.pts.tags[I] |= FT_CURVE_TAG_ON;
}
/*************************************************************************/
/* */
/* FLIPRGOFF: FLIP RanGe OFF */
/* Opcode range: 0x82 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_FLIPRGOFF( INS_ARG )
{
FT_UShort I, K, L;
K = (FT_UShort)args[1];
L = (FT_UShort)args[0];
if ( BOUNDS( K, CUR.pts.n_points ) ||
BOUNDS( L, CUR.pts.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
for ( I = L; I <= K; I++ )
CUR.pts.tags[I] &= ~FT_CURVE_TAG_ON;
}
static FT_Bool
Compute_Point_Displacement( EXEC_OP_ FT_F26Dot6* x,
FT_F26Dot6* y,
TT_GlyphZone zone,
FT_UShort* refp )
{
TT_GlyphZoneRec zp;
FT_UShort p;
FT_F26Dot6 d;
if ( CUR.opcode & 1 )
{
zp = CUR.zp0;
p = CUR.GS.rp1;
}
else
{
zp = CUR.zp1;
p = CUR.GS.rp2;
}
if ( BOUNDS( p, zp.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
*refp = 0;
return FAILURE;
}
*zone = zp;
*refp = p;
d = CUR_Func_project( zp.cur + p, zp.org + p );
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
if ( CUR.face->unpatented_hinting )
{
if ( CUR.GS.both_x_axis )
{
*x = d;
*y = 0;
}
else
{
*x = 0;
*y = d;
}
}
else
#endif
{
*x = FT_MulDiv( d, (FT_Long)CUR.GS.freeVector.x, CUR.F_dot_P );
*y = FT_MulDiv( d, (FT_Long)CUR.GS.freeVector.y, CUR.F_dot_P );
}
return SUCCESS;
}
static void
Move_Zp2_Point( EXEC_OP_ FT_UShort point,
FT_F26Dot6 dx,
FT_F26Dot6 dy,
FT_Bool touch )
{
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
if ( CUR.face->unpatented_hinting )
{
if ( CUR.GS.both_x_axis )
{
CUR.zp2.cur[point].x += dx;
if ( touch )
CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
}
else
{
CUR.zp2.cur[point].y += dy;
if ( touch )
CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y;
}
return;
}
#endif
if ( CUR.GS.freeVector.x != 0 )
{
CUR.zp2.cur[point].x += dx;
if ( touch )
CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
}
if ( CUR.GS.freeVector.y != 0 )
{
CUR.zp2.cur[point].y += dy;
if ( touch )
CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y;
}
}
/*************************************************************************/
/* */
/* SHP[a]: SHift Point by the last point */
/* Opcode range: 0x32-0x33 */
/* Stack: uint32... --> */
/* */
static void
Ins_SHP( INS_ARG )
{
TT_GlyphZoneRec zp;
FT_UShort refp;
FT_F26Dot6 dx,
dy;
FT_UShort point;
FT_UNUSED_ARG;
if ( CUR.top < CUR.GS.loop )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) )
return;
while ( CUR.GS.loop > 0 )
{
CUR.args--;
point = (FT_UShort)CUR.stack[CUR.args];
if ( BOUNDS( point, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = FT_THROW( Invalid_Reference );
return;
}
}
else
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* doesn't follow Cleartype spec but produces better result */
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode )
MOVE_Zp2_Point( point, 0, dy, TRUE );
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
MOVE_Zp2_Point( point, dx, dy, TRUE );
CUR.GS.loop--;
}
Fail:
CUR.GS.loop = 1;
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* SHC[a]: SHift Contour */
/* Opcode range: 0x34-35 */
/* Stack: uint32 --> */
/* */
/* UNDOCUMENTED: According to Greg Hitchcock, there is one (virtual) */
/* contour in the twilight zone, namely contour number */
/* zero which includes all points of it. */
/* */
static void
Ins_SHC( INS_ARG )
{
TT_GlyphZoneRec zp;
FT_UShort refp;
FT_F26Dot6 dx, dy;
FT_Short contour, bounds;
FT_UShort start, limit, i;
contour = (FT_UShort)args[0];
bounds = ( CUR.GS.gep2 == 0 ) ? 1 : CUR.zp2.n_contours;
if ( BOUNDS( contour, bounds ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) )
return;
if ( contour == 0 )
start = 0;
else
start = (FT_UShort)( CUR.zp2.contours[contour - 1] + 1 -
CUR.zp2.first_point );
/* we use the number of points if in the twilight zone */
if ( CUR.GS.gep2 == 0 )
limit = CUR.zp2.n_points;
else
limit = (FT_UShort)( CUR.zp2.contours[contour] -
CUR.zp2.first_point + 1 );
for ( i = start; i < limit; i++ )
{
if ( zp.cur != CUR.zp2.cur || refp != i )
MOVE_Zp2_Point( i, dx, dy, TRUE );
}
}
/*************************************************************************/
/* */
/* SHZ[a]: SHift Zone */
/* Opcode range: 0x36-37 */
/* Stack: uint32 --> */
/* */
static void
Ins_SHZ( INS_ARG )
{
TT_GlyphZoneRec zp;
FT_UShort refp;
FT_F26Dot6 dx,
dy;
FT_UShort limit, i;
if ( BOUNDS( args[0], 2 ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) )
return;
/* XXX: UNDOCUMENTED! SHZ doesn't move the phantom points. */
/* Twilight zone has no real contours, so use `n_points'. */
/* Normal zone's `n_points' includes phantoms, so must */
/* use end of last contour. */
if ( CUR.GS.gep2 == 0 )
limit = (FT_UShort)CUR.zp2.n_points;
else if ( CUR.GS.gep2 == 1 && CUR.zp2.n_contours > 0 )
limit = (FT_UShort)( CUR.zp2.contours[CUR.zp2.n_contours - 1] + 1 );
else
limit = 0;
/* XXX: UNDOCUMENTED! SHZ doesn't touch the points */
for ( i = 0; i < limit; i++ )
{
if ( zp.cur != CUR.zp2.cur || refp != i )
MOVE_Zp2_Point( i, dx, dy, FALSE );
}
}
/*************************************************************************/
/* */
/* SHPIX[]: SHift points by a PIXel amount */
/* Opcode range: 0x38 */
/* Stack: f26.6 uint32... --> */
/* */
static void
Ins_SHPIX( INS_ARG )
{
FT_F26Dot6 dx, dy;
FT_UShort point;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_Int B1, B2;
#endif
if ( CUR.top < CUR.GS.loop + 1 )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
if ( CUR.face->unpatented_hinting )
{
if ( CUR.GS.both_x_axis )
{
dx = (FT_UInt32)args[0];
dy = 0;
}
else
{
dx = 0;
dy = (FT_UInt32)args[0];
}
}
else
#endif
{
dx = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.x );
dy = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.y );
}
while ( CUR.GS.loop > 0 )
{
CUR.args--;
point = (FT_UShort)CUR.stack[CUR.args];
if ( BOUNDS( point, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = FT_THROW( Invalid_Reference );
return;
}
}
else
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
{
/* If not using ignore_x_mode rendering, allow ZP2 move. */
/* If inline deltas aren't allowed, skip ZP2 move. */
/* If using ignore_x_mode rendering, allow ZP2 point move if: */
/* - freedom vector is y and sph_compatibility_mode is off */
/* - the glyph is composite and the move is in the Y direction */
/* - the glyph is specifically set to allow SHPIX moves */
/* - the move is on a previously Y-touched point */
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode )
{
/* save point for later comparison */
if ( CUR.GS.freeVector.y != 0 )
B1 = CUR.zp2.cur[point].y;
else
B1 = CUR.zp2.cur[point].x;
if ( !CUR.face->sph_compatibility_mode &&
CUR.GS.freeVector.y != 0 )
{
MOVE_Zp2_Point( point, dx, dy, TRUE );
/* save new point */
if ( CUR.GS.freeVector.y != 0 )
{
B2 = CUR.zp2.cur[point].y;
/* reverse any disallowed moves */
if ( ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
( B1 & 63 ) != 0 &&
( B2 & 63 ) != 0 &&
B1 != B2 )
MOVE_Zp2_Point( point, -dx, -dy, TRUE );
}
}
else if ( CUR.face->sph_compatibility_mode )
{
if ( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES )
{
dx = FT_PIX_ROUND( B1 + dx ) - B1;
dy = FT_PIX_ROUND( B1 + dy ) - B1;
}
/* skip post-iup deltas */
if ( CUR.iup_called &&
( ( CUR.sph_in_func_flags & SPH_FDEF_INLINE_DELTA_1 ) ||
( CUR.sph_in_func_flags & SPH_FDEF_INLINE_DELTA_2 ) ) )
goto Skip;
if ( !( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) &&
( ( CUR.is_composite && CUR.GS.freeVector.y != 0 ) ||
( CUR.zp2.tags[point] & FT_CURVE_TAG_TOUCH_Y ) ||
( CUR.sph_tweak_flags & SPH_TWEAK_DO_SHPIX ) ) )
MOVE_Zp2_Point( point, 0, dy, TRUE );
/* save new point */
if ( CUR.GS.freeVector.y != 0 )
{
B2 = CUR.zp2.cur[point].y;
/* reverse any disallowed moves */
if ( ( B1 & 63 ) == 0 &&
( B2 & 63 ) != 0 &&
B1 != B2 )
MOVE_Zp2_Point( point, 0, -dy, TRUE );
}
}
else if ( CUR.sph_in_func_flags & SPH_FDEF_TYPEMAN_DIAGENDCTRL )
MOVE_Zp2_Point( point, dx, dy, TRUE );
}
else
MOVE_Zp2_Point( point, dx, dy, TRUE );
}
Skip:
#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
MOVE_Zp2_Point( point, dx, dy, TRUE );
#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR.GS.loop--;
}
Fail:
CUR.GS.loop = 1;
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* MSIRP[a]: Move Stack Indirect Relative Position */
/* Opcode range: 0x3A-0x3B */
/* Stack: f26.6 uint32 --> */
/* */
static void
Ins_MSIRP( INS_ARG )
{
FT_UShort point;
FT_F26Dot6 distance;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_F26Dot6 control_value_cutin = 0; /* pacify compiler */
if ( SUBPIXEL_HINTING )
{
control_value_cutin = CUR.GS.control_value_cutin;
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
control_value_cutin = 0;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
point = (FT_UShort)args[0];
if ( BOUNDS( point, CUR.zp1.n_points ) ||
BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
/* UNDOCUMENTED! The MS rasterizer does that with */
/* twilight points (confirmed by Greg Hitchcock) */
if ( CUR.GS.gep1 == 0 )
{
CUR.zp1.org[point] = CUR.zp0.org[CUR.GS.rp0];
CUR_Func_move_orig( &CUR.zp1, point, args[1] );
CUR.zp1.cur[point] = CUR.zp1.org[point];
}
distance = CUR_Func_project( CUR.zp1.cur + point,
CUR.zp0.cur + CUR.GS.rp0 );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* subpixel hinting - make MSIRP respect CVT cut-in; */
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
FT_ABS( distance - args[1] ) >= control_value_cutin )
distance = args[1];
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR_Func_move( &CUR.zp1, point, args[1] - distance );
CUR.GS.rp1 = CUR.GS.rp0;
CUR.GS.rp2 = point;
if ( ( CUR.opcode & 1 ) != 0 )
CUR.GS.rp0 = point;
}
/*************************************************************************/
/* */
/* MDAP[a]: Move Direct Absolute Point */
/* Opcode range: 0x2E-0x2F */
/* Stack: uint32 --> */
/* */
static void
Ins_MDAP( INS_ARG )
{
FT_UShort point;
FT_F26Dot6 cur_dist;
FT_F26Dot6 distance;
point = (FT_UShort)args[0];
if ( BOUNDS( point, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
if ( ( CUR.opcode & 1 ) != 0 )
{
cur_dist = CUR_fast_project( &CUR.zp0.cur[point] );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 )
distance = ROUND_None(
cur_dist,
CUR.tt_metrics.compensations[0] ) - cur_dist;
else
#endif
distance = CUR_Func_round(
cur_dist,
CUR.tt_metrics.compensations[0] ) - cur_dist;
}
else
distance = 0;
CUR_Func_move( &CUR.zp0, point, distance );
CUR.GS.rp0 = point;
CUR.GS.rp1 = point;
}
/*************************************************************************/
/* */
/* MIAP[a]: Move Indirect Absolute Point */
/* Opcode range: 0x3E-0x3F */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_MIAP( INS_ARG )
{
FT_ULong cvtEntry;
FT_UShort point;
FT_F26Dot6 distance;
FT_F26Dot6 org_dist;
FT_F26Dot6 control_value_cutin;
control_value_cutin = CUR.GS.control_value_cutin;
cvtEntry = (FT_ULong)args[1];
point = (FT_UShort)args[0];
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
CUR.GS.freeVector.y == 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
control_value_cutin = 0;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
if ( BOUNDS( point, CUR.zp0.n_points ) ||
BOUNDSL( cvtEntry, CUR.cvtSize ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
/* UNDOCUMENTED! */
/* */
/* The behaviour of an MIAP instruction is quite different when used */
/* in the twilight zone. */
/* */
/* First, no control value cut-in test is performed as it would fail */
/* anyway. Second, the original point, i.e. (org_x,org_y) of */
/* zp0.point, is set to the absolute, unrounded distance found in the */
/* CVT. */
/* */
/* This is used in the CVT programs of the Microsoft fonts Arial, */
/* Times, etc., in order to re-adjust some key font heights. It */
/* allows the use of the IP instruction in the twilight zone, which */
/* otherwise would be invalid according to the specification. */
/* */
/* We implement it with a special sequence for the twilight zone. */
/* This is a bad hack, but it seems to work. */
/* */
/* Confirmed by Greg Hitchcock. */
distance = CUR_Func_read_cvt( cvtEntry );
if ( CUR.GS.gep0 == 0 ) /* If in twilight zone */
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* Only adjust if not in sph_compatibility_mode or ignore_x_mode. */
/* Determined via experimentation and may be incorrect... */
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
!CUR.face->sph_compatibility_mode ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR.zp0.org[point].x = TT_MulFix14( (FT_UInt32)distance,
CUR.GS.freeVector.x );
CUR.zp0.org[point].y = TT_MulFix14( (FT_UInt32)distance,
CUR.GS.freeVector.y ),
CUR.zp0.cur[point] = CUR.zp0.org[point];
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
( CUR.sph_tweak_flags & SPH_TWEAK_MIAP_HACK ) &&
distance > 0 &&
CUR.GS.freeVector.y != 0 )
distance = 0;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
org_dist = CUR_fast_project( &CUR.zp0.cur[point] );
if ( ( CUR.opcode & 1 ) != 0 ) /* rounding and control cut-in flag */
{
if ( FT_ABS( distance - org_dist ) > control_value_cutin )
distance = org_dist;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 )
distance = ROUND_None( distance,
CUR.tt_metrics.compensations[0] );
else
#endif
distance = CUR_Func_round( distance,
CUR.tt_metrics.compensations[0] );
}
CUR_Func_move( &CUR.zp0, point, distance - org_dist );
Fail:
CUR.GS.rp0 = point;
CUR.GS.rp1 = point;
}
/*************************************************************************/
/* */
/* MDRP[abcde]: Move Direct Relative Point */
/* Opcode range: 0xC0-0xDF */
/* Stack: uint32 --> */
/* */
static void
Ins_MDRP( INS_ARG )
{
FT_UShort point;
FT_F26Dot6 org_dist, distance, minimum_distance;
minimum_distance = CUR.GS.minimum_distance;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
minimum_distance = 0;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
point = (FT_UShort)args[0];
if ( BOUNDS( point, CUR.zp1.n_points ) ||
BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
/* XXX: Is there some undocumented feature while in the */
/* twilight zone? */
/* XXX: UNDOCUMENTED: twilight zone special case */
if ( CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 )
{
FT_Vector* vec1 = &CUR.zp1.org[point];
FT_Vector* vec2 = &CUR.zp0.org[CUR.GS.rp0];
org_dist = CUR_Func_dualproj( vec1, vec2 );
}
else
{
FT_Vector* vec1 = &CUR.zp1.orus[point];
FT_Vector* vec2 = &CUR.zp0.orus[CUR.GS.rp0];
if ( CUR.metrics.x_scale == CUR.metrics.y_scale )
{
/* this should be faster */
org_dist = CUR_Func_dualproj( vec1, vec2 );
org_dist = FT_MulFix( org_dist, CUR.metrics.x_scale );
}
else
{
FT_Vector vec;
vec.x = FT_MulFix( vec1->x - vec2->x, CUR.metrics.x_scale );
vec.y = FT_MulFix( vec1->y - vec2->y, CUR.metrics.y_scale );
org_dist = CUR_fast_dualproj( &vec );
}
}
/* single width cut-in test */
if ( FT_ABS( org_dist - CUR.GS.single_width_value ) <
CUR.GS.single_width_cutin )
{
if ( org_dist >= 0 )
org_dist = CUR.GS.single_width_value;
else
org_dist = -CUR.GS.single_width_value;
}
/* round flag */
if ( ( CUR.opcode & 4 ) != 0 )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 )
distance = ROUND_None(
org_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
else
#endif
distance = CUR_Func_round(
org_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
}
else
distance = ROUND_None(
org_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
/* minimum distance flag */
if ( ( CUR.opcode & 8 ) != 0 )
{
if ( org_dist >= 0 )
{
if ( distance < minimum_distance )
distance = minimum_distance;
}
else
{
if ( distance > -minimum_distance )
distance = -minimum_distance;
}
}
/* now move the point */
org_dist = CUR_Func_project( CUR.zp1.cur + point,
CUR.zp0.cur + CUR.GS.rp0 );
CUR_Func_move( &CUR.zp1, point, distance - org_dist );
Fail:
CUR.GS.rp1 = CUR.GS.rp0;
CUR.GS.rp2 = point;
if ( ( CUR.opcode & 16 ) != 0 )
CUR.GS.rp0 = point;
}
/*************************************************************************/
/* */
/* MIRP[abcde]: Move Indirect Relative Point */
/* Opcode range: 0xE0-0xFF */
/* Stack: int32? uint32 --> */
/* */
static void
Ins_MIRP( INS_ARG )
{
FT_UShort point;
FT_ULong cvtEntry;
FT_F26Dot6 cvt_dist,
distance,
cur_dist,
org_dist,
control_value_cutin,
minimum_distance;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_Int B1 = 0; /* pacify compiler */
FT_Int B2 = 0;
FT_Bool reverse_move = FALSE;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
minimum_distance = CUR.GS.minimum_distance;
control_value_cutin = CUR.GS.control_value_cutin;
point = (FT_UShort)args[0];
cvtEntry = (FT_ULong)( args[1] + 1 );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
control_value_cutin = minimum_distance = 0;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* XXX: UNDOCUMENTED! cvt[-1] = 0 always */
if ( BOUNDS( point, CUR.zp1.n_points ) ||
BOUNDSL( cvtEntry, CUR.cvtSize + 1 ) ||
BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
if ( !cvtEntry )
cvt_dist = 0;
else
cvt_dist = CUR_Func_read_cvt( cvtEntry - 1 );
/* single width test */
if ( FT_ABS( cvt_dist - CUR.GS.single_width_value ) <
CUR.GS.single_width_cutin )
{
if ( cvt_dist >= 0 )
cvt_dist = CUR.GS.single_width_value;
else
cvt_dist = -CUR.GS.single_width_value;
}
/* UNDOCUMENTED! The MS rasterizer does that with */
/* twilight points (confirmed by Greg Hitchcock) */
if ( CUR.GS.gep1 == 0 )
{
CUR.zp1.org[point].x = CUR.zp0.org[CUR.GS.rp0].x +
TT_MulFix14( (FT_UInt32)cvt_dist,
CUR.GS.freeVector.x );
CUR.zp1.org[point].y = CUR.zp0.org[CUR.GS.rp0].y +
TT_MulFix14( (FT_UInt32)cvt_dist,
CUR.GS.freeVector.y );
CUR.zp1.cur[point] = CUR.zp1.org[point];
}
org_dist = CUR_Func_dualproj( &CUR.zp1.org[point],
&CUR.zp0.org[CUR.GS.rp0] );
cur_dist = CUR_Func_project ( &CUR.zp1.cur[point],
&CUR.zp0.cur[CUR.GS.rp0] );
/* auto-flip test */
if ( CUR.GS.auto_flip )
{
if ( ( org_dist ^ cvt_dist ) < 0 )
cvt_dist = -cvt_dist;
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_TIMES_NEW_ROMAN_HACK ) )
{
if ( cur_dist < -64 )
cvt_dist -= 16;
else if ( cur_dist > 64 && cur_dist < 84 )
cvt_dist += 32;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* control value cut-in and round */
if ( ( CUR.opcode & 4 ) != 0 )
{
/* XXX: UNDOCUMENTED! Only perform cut-in test when both points */
/* refer to the same zone. */
if ( CUR.GS.gep0 == CUR.GS.gep1 )
{
/* XXX: According to Greg Hitchcock, the following wording is */
/* the right one: */
/* */
/* When the absolute difference between the value in */
/* the table [CVT] and the measurement directly from */
/* the outline is _greater_ than the cut_in value, the */
/* outline measurement is used. */
/* */
/* This is from `instgly.doc'. The description in */
/* `ttinst2.doc', version 1.66, is thus incorrect since */
/* it implies `>=' instead of `>'. */
if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin )
cvt_dist = org_dist;
}
distance = CUR_Func_round(
cvt_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
}
else
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* do cvt cut-in always in MIRP for sph */
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.gep0 == CUR.GS.gep1 )
{
if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin )
cvt_dist = org_dist;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
distance = ROUND_None(
cvt_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
}
/* minimum distance test */
if ( ( CUR.opcode & 8 ) != 0 )
{
if ( org_dist >= 0 )
{
if ( distance < minimum_distance )
distance = minimum_distance;
}
else
{
if ( distance > -minimum_distance )
distance = -minimum_distance;
}
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING )
{
B1 = CUR.zp1.cur[point].y;
/* Round moves if necessary */
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) )
distance = FT_PIX_ROUND( B1 + distance - cur_dist ) - B1 + cur_dist;
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.opcode & 16 ) == 0 &&
( CUR.opcode & 8 ) == 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_COURIER_NEW_2_HACK ) )
distance += 64;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR_Func_move( &CUR.zp1, point, distance - cur_dist );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING )
{
B2 = CUR.zp1.cur[point].y;
/* Reverse move if necessary */
if ( CUR.ignore_x_mode )
{
if ( CUR.face->sph_compatibility_mode &&
CUR.GS.freeVector.y != 0 &&
( B1 & 63 ) == 0 &&
( B2 & 63 ) != 0 )
reverse_move = TRUE;
if ( ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
CUR.GS.freeVector.y != 0 &&
( B2 & 63 ) != 0 &&
( B1 & 63 ) != 0 )
reverse_move = TRUE;
}
if ( reverse_move )
CUR_Func_move( &CUR.zp1, point, -( distance - cur_dist ) );
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
Fail:
CUR.GS.rp1 = CUR.GS.rp0;
if ( ( CUR.opcode & 16 ) != 0 )
CUR.GS.rp0 = point;
CUR.GS.rp2 = point;
}
/*************************************************************************/
/* */
/* ALIGNRP[]: ALIGN Relative Point */
/* Opcode range: 0x3C */
/* Stack: uint32 uint32... --> */
/* */
static void
Ins_ALIGNRP( INS_ARG )
{
FT_UShort point;
FT_F26Dot6 distance;
FT_UNUSED_ARG;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.iup_called &&
( CUR.sph_tweak_flags & SPH_TWEAK_NO_ALIGNRP_AFTER_IUP ) )
{
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
if ( CUR.top < CUR.GS.loop ||
BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
while ( CUR.GS.loop > 0 )
{
CUR.args--;
point = (FT_UShort)CUR.stack[CUR.args];
if ( BOUNDS( point, CUR.zp1.n_points ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = FT_THROW( Invalid_Reference );
return;
}
}
else
{
distance = CUR_Func_project( CUR.zp1.cur + point,
CUR.zp0.cur + CUR.GS.rp0 );
CUR_Func_move( &CUR.zp1, point, -distance );
}
CUR.GS.loop--;
}
Fail:
CUR.GS.loop = 1;
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* ISECT[]: moves point to InterSECTion */
/* Opcode range: 0x0F */
/* Stack: 5 * uint32 --> */
/* */
static void
Ins_ISECT( INS_ARG )
{
FT_UShort point,
a0, a1,
b0, b1;
FT_F26Dot6 discriminant, dotproduct;
FT_F26Dot6 dx, dy,
dax, day,
dbx, dby;
FT_F26Dot6 val;
FT_Vector R;
point = (FT_UShort)args[0];
a0 = (FT_UShort)args[1];
a1 = (FT_UShort)args[2];
b0 = (FT_UShort)args[3];
b1 = (FT_UShort)args[4];
if ( BOUNDS( b0, CUR.zp0.n_points ) ||
BOUNDS( b1, CUR.zp0.n_points ) ||
BOUNDS( a0, CUR.zp1.n_points ) ||
BOUNDS( a1, CUR.zp1.n_points ) ||
BOUNDS( point, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
/* Cramer's rule */
dbx = CUR.zp0.cur[b1].x - CUR.zp0.cur[b0].x;
dby = CUR.zp0.cur[b1].y - CUR.zp0.cur[b0].y;
dax = CUR.zp1.cur[a1].x - CUR.zp1.cur[a0].x;
day = CUR.zp1.cur[a1].y - CUR.zp1.cur[a0].y;
dx = CUR.zp0.cur[b0].x - CUR.zp1.cur[a0].x;
dy = CUR.zp0.cur[b0].y - CUR.zp1.cur[a0].y;
CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_BOTH;
discriminant = FT_MulDiv( dax, -dby, 0x40 ) +
FT_MulDiv( day, dbx, 0x40 );
dotproduct = FT_MulDiv( dax, dbx, 0x40 ) +
FT_MulDiv( day, dby, 0x40 );
/* The discriminant above is actually a cross product of vectors */
/* da and db. Together with the dot product, they can be used as */
/* surrogates for sine and cosine of the angle between the vectors. */
/* Indeed, */
/* dotproduct = |da||db|cos(angle) */
/* discriminant = |da||db|sin(angle) . */
/* We use these equations to reject grazing intersections by */
/* thresholding abs(tan(angle)) at 1/19, corresponding to 3 degrees. */
if ( 19 * FT_ABS( discriminant ) > FT_ABS( dotproduct ) )
{
val = FT_MulDiv( dx, -dby, 0x40 ) + FT_MulDiv( dy, dbx, 0x40 );
R.x = FT_MulDiv( val, dax, discriminant );
R.y = FT_MulDiv( val, day, discriminant );
CUR.zp2.cur[point].x = CUR.zp1.cur[a0].x + R.x;
CUR.zp2.cur[point].y = CUR.zp1.cur[a0].y + R.y;
}
else
{
/* else, take the middle of the middles of A and B */
CUR.zp2.cur[point].x = ( CUR.zp1.cur[a0].x +
CUR.zp1.cur[a1].x +
CUR.zp0.cur[b0].x +
CUR.zp0.cur[b1].x ) / 4;
CUR.zp2.cur[point].y = ( CUR.zp1.cur[a0].y +
CUR.zp1.cur[a1].y +
CUR.zp0.cur[b0].y +
CUR.zp0.cur[b1].y ) / 4;
}
}
/*************************************************************************/
/* */
/* ALIGNPTS[]: ALIGN PoinTS */
/* Opcode range: 0x27 */
/* Stack: uint32 uint32 --> */
/* */
static void
Ins_ALIGNPTS( INS_ARG )
{
FT_UShort p1, p2;
FT_F26Dot6 distance;
p1 = (FT_UShort)args[0];
p2 = (FT_UShort)args[1];
if ( BOUNDS( p1, CUR.zp1.n_points ) ||
BOUNDS( p2, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
distance = CUR_Func_project( CUR.zp0.cur + p2,
CUR.zp1.cur + p1 ) / 2;
CUR_Func_move( &CUR.zp1, p1, distance );
CUR_Func_move( &CUR.zp0, p2, -distance );
}
/*************************************************************************/
/* */
/* IP[]: Interpolate Point */
/* Opcode range: 0x39 */
/* Stack: uint32... --> */
/* */
/* SOMETIMES, DUMBER CODE IS BETTER CODE */
static void
Ins_IP( INS_ARG )
{
FT_F26Dot6 old_range, cur_range;
FT_Vector* orus_base;
FT_Vector* cur_base;
FT_Int twilight;
FT_UNUSED_ARG;
if ( CUR.top < CUR.GS.loop )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
/*
* We need to deal in a special way with the twilight zone.
* Otherwise, by definition, the value of CUR.twilight.orus[n] is (0,0),
* for every n.
*/
twilight = CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 || CUR.GS.gep2 == 0;
if ( BOUNDS( CUR.GS.rp1, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
goto Fail;
}
if ( twilight )
orus_base = &CUR.zp0.org[CUR.GS.rp1];
else
orus_base = &CUR.zp0.orus[CUR.GS.rp1];
cur_base = &CUR.zp0.cur[CUR.GS.rp1];
/* XXX: There are some glyphs in some braindead but popular */
/* fonts out there (e.g. [aeu]grave in monotype.ttf) */
/* calling IP[] with bad values of rp[12]. */
/* Do something sane when this odd thing happens. */
if ( BOUNDS( CUR.GS.rp1, CUR.zp0.n_points ) ||
BOUNDS( CUR.GS.rp2, CUR.zp1.n_points ) )
{
old_range = 0;
cur_range = 0;
}
else
{
if ( twilight )
old_range = CUR_Func_dualproj( &CUR.zp1.org[CUR.GS.rp2],
orus_base );
else if ( CUR.metrics.x_scale == CUR.metrics.y_scale )
old_range = CUR_Func_dualproj( &CUR.zp1.orus[CUR.GS.rp2],
orus_base );
else
{
FT_Vector vec;
vec.x = FT_MulFix( CUR.zp1.orus[CUR.GS.rp2].x - orus_base->x,
CUR.metrics.x_scale );
vec.y = FT_MulFix( CUR.zp1.orus[CUR.GS.rp2].y - orus_base->y,
CUR.metrics.y_scale );
old_range = CUR_fast_dualproj( &vec );
}
cur_range = CUR_Func_project ( &CUR.zp1.cur[CUR.GS.rp2], cur_base );
}
for ( ; CUR.GS.loop > 0; --CUR.GS.loop )
{
FT_UInt point = (FT_UInt)CUR.stack[--CUR.args];
FT_F26Dot6 org_dist, cur_dist, new_dist;
/* check point bounds */
if ( BOUNDS( point, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = FT_THROW( Invalid_Reference );
return;
}
continue;
}
if ( twilight )
org_dist = CUR_Func_dualproj( &CUR.zp2.org[point], orus_base );
else if ( CUR.metrics.x_scale == CUR.metrics.y_scale )
org_dist = CUR_Func_dualproj( &CUR.zp2.orus[point], orus_base );
else
{
FT_Vector vec;
vec.x = FT_MulFix( CUR.zp2.orus[point].x - orus_base->x,
CUR.metrics.x_scale );
vec.y = FT_MulFix( CUR.zp2.orus[point].y - orus_base->y,
CUR.metrics.y_scale );
org_dist = CUR_fast_dualproj( &vec );
}
cur_dist = CUR_Func_project ( &CUR.zp2.cur[point], cur_base );
if ( org_dist )
{
if ( old_range )
new_dist = FT_MulDiv( org_dist, cur_range, old_range );
else
{
/* This is the same as what MS does for the invalid case: */
/* */
/* delta = (Original_Pt - Original_RP1) - */
/* (Current_Pt - Current_RP1) */
/* */
/* In FreeType speak: */
/* */
/* new_dist = cur_dist - */
/* org_dist - cur_dist; */
new_dist = -org_dist;
}
}
else
new_dist = 0;
CUR_Func_move( &CUR.zp2, (FT_UShort)point, new_dist - cur_dist );
}
Fail:
CUR.GS.loop = 1;
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* UTP[a]: UnTouch Point */
/* Opcode range: 0x29 */
/* Stack: uint32 --> */
/* */
static void
Ins_UTP( INS_ARG )
{
FT_UShort point;
FT_Byte mask;
point = (FT_UShort)args[0];
if ( BOUNDS( point, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
return;
}
mask = 0xFF;
if ( CUR.GS.freeVector.x != 0 )
mask &= ~FT_CURVE_TAG_TOUCH_X;
if ( CUR.GS.freeVector.y != 0 )
mask &= ~FT_CURVE_TAG_TOUCH_Y;
CUR.zp0.tags[point] &= mask;
}
/* Local variables for Ins_IUP: */
typedef struct IUP_WorkerRec_
{
FT_Vector* orgs; /* original and current coordinate */
FT_Vector* curs; /* arrays */
FT_Vector* orus;
FT_UInt max_points;
} IUP_WorkerRec, *IUP_Worker;
static void
_iup_worker_shift( IUP_Worker worker,
FT_UInt p1,
FT_UInt p2,
FT_UInt p )
{
FT_UInt i;
FT_F26Dot6 dx;
dx = worker->curs[p].x - worker->orgs[p].x;
if ( dx != 0 )
{
for ( i = p1; i < p; i++ )
worker->curs[i].x += dx;
for ( i = p + 1; i <= p2; i++ )
worker->curs[i].x += dx;
}
}
static void
_iup_worker_interpolate( IUP_Worker worker,
FT_UInt p1,
FT_UInt p2,
FT_UInt ref1,
FT_UInt ref2 )
{
FT_UInt i;
FT_F26Dot6 orus1, orus2, org1, org2, delta1, delta2;
if ( p1 > p2 )
return;
if ( BOUNDS( ref1, worker->max_points ) ||
BOUNDS( ref2, worker->max_points ) )
return;
orus1 = worker->orus[ref1].x;
orus2 = worker->orus[ref2].x;
if ( orus1 > orus2 )
{
FT_F26Dot6 tmp_o;
FT_UInt tmp_r;
tmp_o = orus1;
orus1 = orus2;
orus2 = tmp_o;
tmp_r = ref1;
ref1 = ref2;
ref2 = tmp_r;
}
org1 = worker->orgs[ref1].x;
org2 = worker->orgs[ref2].x;
delta1 = worker->curs[ref1].x - org1;
delta2 = worker->curs[ref2].x - org2;
if ( orus1 == orus2 )
{
/* simple shift of untouched points */
for ( i = p1; i <= p2; i++ )
{
FT_F26Dot6 x = worker->orgs[i].x;
if ( x <= org1 )
x += delta1;
else
x += delta2;
worker->curs[i].x = x;
}
}
else
{
FT_Fixed scale = 0;
FT_Bool scale_valid = 0;
/* interpolation */
for ( i = p1; i <= p2; i++ )
{
FT_F26Dot6 x = worker->orgs[i].x;
if ( x <= org1 )
x += delta1;
else if ( x >= org2 )
x += delta2;
else
{
if ( !scale_valid )
{
scale_valid = 1;
scale = FT_DivFix( org2 + delta2 - ( org1 + delta1 ),
orus2 - orus1 );
}
x = ( org1 + delta1 ) +
FT_MulFix( worker->orus[i].x - orus1, scale );
}
worker->curs[i].x = x;
}
}
}
/*************************************************************************/
/* */
/* IUP[a]: Interpolate Untouched Points */
/* Opcode range: 0x30-0x31 */
/* Stack: --> */
/* */
static void
Ins_IUP( INS_ARG )
{
IUP_WorkerRec V;
FT_Byte mask;
FT_UInt first_point; /* first point of contour */
FT_UInt end_point; /* end point (last+1) of contour */
FT_UInt first_touched; /* first touched point in contour */
FT_UInt cur_touched; /* current touched point in contour */
FT_UInt point; /* current point */
FT_Short contour; /* current contour */
FT_UNUSED_ARG;
/* ignore empty outlines */
if ( CUR.pts.n_contours == 0 )
return;
if ( CUR.opcode & 1 )
{
mask = FT_CURVE_TAG_TOUCH_X;
V.orgs = CUR.pts.org;
V.curs = CUR.pts.cur;
V.orus = CUR.pts.orus;
}
else
{
mask = FT_CURVE_TAG_TOUCH_Y;
V.orgs = (FT_Vector*)( (FT_Pos*)CUR.pts.org + 1 );
V.curs = (FT_Vector*)( (FT_Pos*)CUR.pts.cur + 1 );
V.orus = (FT_Vector*)( (FT_Pos*)CUR.pts.orus + 1 );
}
V.max_points = CUR.pts.n_points;
contour = 0;
point = 0;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode )
{
CUR.iup_called = TRUE;
if ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_IUP )
return;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
do
{
end_point = CUR.pts.contours[contour] - CUR.pts.first_point;
first_point = point;
if ( BOUNDS ( end_point, CUR.pts.n_points ) )
end_point = CUR.pts.n_points - 1;
while ( point <= end_point && ( CUR.pts.tags[point] & mask ) == 0 )
point++;
if ( point <= end_point )
{
first_touched = point;
cur_touched = point;
point++;
while ( point <= end_point )
{
if ( ( CUR.pts.tags[point] & mask ) != 0 )
{
_iup_worker_interpolate( &V,
cur_touched + 1,
point - 1,
cur_touched,
point );
cur_touched = point;
}
point++;
}
if ( cur_touched == first_touched )
_iup_worker_shift( &V, first_point, end_point, cur_touched );
else
{
_iup_worker_interpolate( &V,
(FT_UShort)( cur_touched + 1 ),
end_point,
cur_touched,
first_touched );
if ( first_touched > 0 )
_iup_worker_interpolate( &V,
first_point,
first_touched - 1,
cur_touched,
first_touched );
}
}
contour++;
} while ( contour < CUR.pts.n_contours );
}
/*************************************************************************/
/* */
/* DELTAPn[]: DELTA exceptions P1, P2, P3 */
/* Opcode range: 0x5D,0x71,0x72 */
/* Stack: uint32 (2 * uint32)... --> */
/* */
static void
Ins_DELTAP( INS_ARG )
{
FT_ULong k, nump;
FT_UShort A;
FT_ULong C;
FT_Long B;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_UShort B1, B2;
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.iup_called &&
( CUR.sph_tweak_flags & SPH_TWEAK_NO_DELTAP_AFTER_IUP ) )
goto Fail;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
/* Delta hinting is covered by US Patent 5159668. */
if ( CUR.face->unpatented_hinting )
{
FT_Long n = args[0] * 2;
if ( CUR.args < n )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Too_Few_Arguments );
n = CUR.args;
}
CUR.args -= n;
CUR.new_top = CUR.args;
return;
}
#endif
nump = (FT_ULong)args[0]; /* some points theoretically may occur more
than once, thus UShort isn't enough */
for ( k = 1; k <= nump; k++ )
{
if ( CUR.args < 2 )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Too_Few_Arguments );
CUR.args = 0;
goto Fail;
}
CUR.args -= 2;
A = (FT_UShort)CUR.stack[CUR.args + 1];
B = CUR.stack[CUR.args];
/* XXX: Because some popular fonts contain some invalid DeltaP */
/* instructions, we simply ignore them when the stacked */
/* point reference is off limit, rather than returning an */
/* error. As a delta instruction doesn't change a glyph */
/* in great ways, this shouldn't be a problem. */
if ( !BOUNDS( A, CUR.zp0.n_points ) )
{
C = ( (FT_ULong)B & 0xF0 ) >> 4;
switch ( CUR.opcode )
{
case 0x5D:
break;
case 0x71:
C += 16;
break;
case 0x72:
C += 32;
break;
}
C += CUR.GS.delta_base;
if ( CURRENT_Ppem() == (FT_Long)C )
{
B = ( (FT_ULong)B & 0xF ) - 8;
if ( B >= 0 )
B++;
B = B * 64 / ( 1L << CUR.GS.delta_shift );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING )
{
/*
* Allow delta move if
*
* - not using ignore_x_mode rendering
* - glyph is specifically set to allow it
* - glyph is composite and freedom vector is not subpixel
* vector
*/
if ( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_DO_DELTAP ) ||
( CUR.is_composite && CUR.GS.freeVector.y != 0 ) )
CUR_Func_move( &CUR.zp0, A, B );
/* Otherwise apply subpixel hinting and */
/* compatibility mode rules */
else if ( CUR.ignore_x_mode )
{
if ( CUR.GS.freeVector.y != 0 )
B1 = CUR.zp0.cur[A].y;
else
B1 = CUR.zp0.cur[A].x;
#if 0
/* Standard Subpixel Hinting: Allow y move. */
/* This messes up dejavu and may not be needed... */
if ( !CUR.face->sph_compatibility_mode &&
CUR.GS.freeVector.y != 0 )
CUR_Func_move( &CUR.zp0, A, B );
else
#endif /* 0 */
/* Compatibility Mode: Allow x or y move if point touched in */
/* Y direction. */
if ( CUR.face->sph_compatibility_mode &&
!( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) )
{
/* save the y value of the point now; compare after move */
B1 = CUR.zp0.cur[A].y;
if ( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES )
B = FT_PIX_ROUND( B1 + B ) - B1;
/* Allow delta move if using sph_compatibility_mode, */
/* IUP has not been called, and point is touched on Y. */
if ( !CUR.iup_called &&
( CUR.zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) )
CUR_Func_move( &CUR.zp0, A, B );
}
B2 = CUR.zp0.cur[A].y;
/* Reverse this move if it results in a disallowed move */
if ( CUR.GS.freeVector.y != 0 &&
( ( CUR.face->sph_compatibility_mode &&
( B1 & 63 ) == 0 &&
( B2 & 63 ) != 0 ) ||
( ( CUR.sph_tweak_flags &
SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES_DELTAP ) &&
( B1 & 63 ) != 0 &&
( B2 & 63 ) != 0 ) ) )
CUR_Func_move( &CUR.zp0, A, -B );
}
}
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR_Func_move( &CUR.zp0, A, B );
}
}
else
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Invalid_Reference );
}
Fail:
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* DELTACn[]: DELTA exceptions C1, C2, C3 */
/* Opcode range: 0x73,0x74,0x75 */
/* Stack: uint32 (2 * uint32)... --> */
/* */
static void
Ins_DELTAC( INS_ARG )
{
FT_ULong nump, k;
FT_ULong A, C;
FT_Long B;
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
/* Delta hinting is covered by US Patent 5159668. */
if ( CUR.face->unpatented_hinting )
{
FT_Long n = args[0] * 2;
if ( CUR.args < n )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Too_Few_Arguments );
n = CUR.args;
}
CUR.args -= n;
CUR.new_top = CUR.args;
return;
}
#endif
nump = (FT_ULong)args[0];
for ( k = 1; k <= nump; k++ )
{
if ( CUR.args < 2 )
{
if ( CUR.pedantic_hinting )
CUR.error = FT_THROW( Too_Few_Arguments );
CUR.args = 0;
goto Fail;
}
CUR.args -= 2;
A = (FT_ULong)CUR.stack[CUR.args + 1];
B = CUR.stack[CUR.args];
if ( BOUNDSL( A, CUR.cvtSize ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = FT_THROW( Invalid_Reference );
return;
}
}
else
{
C = ( (FT_ULong)B & 0xF0 ) >> 4;
switch ( CUR.opcode )
{
case 0x73:
break;
case 0x74:
C += 16;
break;
case 0x75:
C += 32;
break;
}
C += CUR.GS.delta_base;
if ( CURRENT_Ppem() == (FT_Long)C )
{
B = ( (FT_ULong)B & 0xF ) - 8;
if ( B >= 0 )
B++;
B = B * 64 / ( 1L << CUR.GS.delta_shift );
CUR_Func_move_cvt( A, B );
}
}
}
Fail:
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* MISC. INSTRUCTIONS */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* GETINFO[]: GET INFOrmation */
/* Opcode range: 0x88 */
/* Stack: uint32 --> uint32 */
/* */
static void
Ins_GETINFO( INS_ARG )
{
FT_Long K;
K = 0;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/********************************/
/* RASTERIZER VERSION */
/* Selector Bit: 0 */
/* Return Bit(s): 0-7 */
/* */
if ( SUBPIXEL_HINTING &&
( args[0] & 1 ) != 0 &&
CUR.ignore_x_mode )
{
K = CUR.rasterizer_version;
FT_TRACE7(( "Setting rasterizer version %d\n",
CUR.rasterizer_version ));
}
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
if ( ( args[0] & 1 ) != 0 )
K = TT_INTERPRETER_VERSION_35;
/********************************/
/* GLYPH ROTATED */
/* Selector Bit: 1 */
/* Return Bit(s): 8 */
/* */
if ( ( args[0] & 2 ) != 0 && CUR.tt_metrics.rotated )
K |= 0x80;
/********************************/
/* GLYPH STRETCHED */
/* Selector Bit: 2 */
/* Return Bit(s): 9 */
/* */
if ( ( args[0] & 4 ) != 0 && CUR.tt_metrics.stretched )
K |= 1 << 8;
/********************************/
/* HINTING FOR GRAYSCALE */
/* Selector Bit: 5 */
/* Return Bit(s): 12 */
/* */
if ( ( args[0] & 32 ) != 0 && CUR.grayscale )
K |= 1 << 12;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.rasterizer_version >= TT_INTERPRETER_VERSION_35 )
{
/********************************/
/* HINTING FOR GRAYSCALE */
/* Selector Bit: 5 */
/* Return Bit(s): 12 */
/* */
if ( ( args[0] & 32 ) != 0 && CUR.grayscale_hinting )
K |= 1 << 12;
/********************************/
/* HINTING FOR SUBPIXEL */
/* Selector Bit: 6 */
/* Return Bit(s): 13 */
/* */
if ( ( args[0] & 64 ) != 0 &&
CUR.subpixel_hinting &&
CUR.rasterizer_version >= 37 )
{
K |= 1 << 13;
/* the stuff below is irrelevant if subpixel_hinting is not set */
/********************************/
/* COMPATIBLE WIDTHS ENABLED */
/* Selector Bit: 7 */
/* Return Bit(s): 14 */
/* */
/* Functionality still needs to be added */
if ( ( args[0] & 128 ) != 0 && CUR.compatible_widths )
K |= 1 << 14;
/********************************/
/* SYMMETRICAL SMOOTHING */
/* Selector Bit: 8 */
/* Return Bit(s): 15 */
/* */
/* Functionality still needs to be added */
if ( ( args[0] & 256 ) != 0 && CUR.symmetrical_smoothing )
K |= 1 << 15;
/********************************/
/* HINTING FOR BGR? */
/* Selector Bit: 9 */
/* Return Bit(s): 16 */
/* */
/* Functionality still needs to be added */
if ( ( args[0] & 512 ) != 0 && CUR.bgr )
K |= 1 << 16;
if ( CUR.rasterizer_version >= 38 )
{
/********************************/
/* SUBPIXEL POSITIONED? */
/* Selector Bit: 10 */
/* Return Bit(s): 17 */
/* */
/* Functionality still needs to be added */
if ( ( args[0] & 1024 ) != 0 && CUR.subpixel_positioned )
K |= 1 << 17;
}
}
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
args[0] = K;
}
static void
Ins_UNKNOWN( INS_ARG )
{
TT_DefRecord* def = CUR.IDefs;
TT_DefRecord* limit = def + CUR.numIDefs;
FT_UNUSED_ARG;
for ( ; def < limit; def++ )
{
if ( (FT_Byte)def->opc == CUR.opcode && def->active )
{
TT_CallRec* call;
if ( CUR.callTop >= CUR.callSize )
{
CUR.error = FT_THROW( Stack_Overflow );
return;
}
call = CUR.callStack + CUR.callTop++;
call->Caller_Range = CUR.curRange;
call->Caller_IP = CUR.IP + 1;
call->Cur_Count = 1;
call->Cur_Restart = def->start;
call->Cur_End = def->end;
INS_Goto_CodeRange( def->range, def->start );
CUR.step_ins = FALSE;
return;
}
}
CUR.error = FT_THROW( Invalid_Opcode );
}
#ifndef TT_CONFIG_OPTION_INTERPRETER_SWITCH
static
TInstruction_Function Instruct_Dispatch[256] =
{
/* Opcodes are gathered in groups of 16. */
/* Please keep the spaces as they are. */
/* SVTCA y */ Ins_SVTCA,
/* SVTCA x */ Ins_SVTCA,
/* SPvTCA y */ Ins_SPVTCA,
/* SPvTCA x */ Ins_SPVTCA,
/* SFvTCA y */ Ins_SFVTCA,
/* SFvTCA x */ Ins_SFVTCA,
/* SPvTL // */ Ins_SPVTL,
/* SPvTL + */ Ins_SPVTL,
/* SFvTL // */ Ins_SFVTL,
/* SFvTL + */ Ins_SFVTL,
/* SPvFS */ Ins_SPVFS,
/* SFvFS */ Ins_SFVFS,
/* GPV */ Ins_GPV,
/* GFV */ Ins_GFV,
/* SFvTPv */ Ins_SFVTPV,
/* ISECT */ Ins_ISECT,
/* SRP0 */ Ins_SRP0,
/* SRP1 */ Ins_SRP1,
/* SRP2 */ Ins_SRP2,
/* SZP0 */ Ins_SZP0,
/* SZP1 */ Ins_SZP1,
/* SZP2 */ Ins_SZP2,
/* SZPS */ Ins_SZPS,
/* SLOOP */ Ins_SLOOP,
/* RTG */ Ins_RTG,
/* RTHG */ Ins_RTHG,
/* SMD */ Ins_SMD,
/* ELSE */ Ins_ELSE,
/* JMPR */ Ins_JMPR,
/* SCvTCi */ Ins_SCVTCI,
/* SSwCi */ Ins_SSWCI,
/* SSW */ Ins_SSW,
/* DUP */ Ins_DUP,
/* POP */ Ins_POP,
/* CLEAR */ Ins_CLEAR,
/* SWAP */ Ins_SWAP,
/* DEPTH */ Ins_DEPTH,
/* CINDEX */ Ins_CINDEX,
/* MINDEX */ Ins_MINDEX,
/* AlignPTS */ Ins_ALIGNPTS,
/* INS_0x28 */ Ins_UNKNOWN,
/* UTP */ Ins_UTP,
/* LOOPCALL */ Ins_LOOPCALL,
/* CALL */ Ins_CALL,
/* FDEF */ Ins_FDEF,
/* ENDF */ Ins_ENDF,
/* MDAP[0] */ Ins_MDAP,
/* MDAP[1] */ Ins_MDAP,
/* IUP[0] */ Ins_IUP,
/* IUP[1] */ Ins_IUP,
/* SHP[0] */ Ins_SHP,
/* SHP[1] */ Ins_SHP,
/* SHC[0] */ Ins_SHC,
/* SHC[1] */ Ins_SHC,
/* SHZ[0] */ Ins_SHZ,
/* SHZ[1] */ Ins_SHZ,
/* SHPIX */ Ins_SHPIX,
/* IP */ Ins_IP,
/* MSIRP[0] */ Ins_MSIRP,
/* MSIRP[1] */ Ins_MSIRP,
/* AlignRP */ Ins_ALIGNRP,
/* RTDG */ Ins_RTDG,
/* MIAP[0] */ Ins_MIAP,
/* MIAP[1] */ Ins_MIAP,
/* NPushB */ Ins_NPUSHB,
/* NPushW */ Ins_NPUSHW,
/* WS */ Ins_WS,
/* RS */ Ins_RS,
/* WCvtP */ Ins_WCVTP,
/* RCvt */ Ins_RCVT,
/* GC[0] */ Ins_GC,
/* GC[1] */ Ins_GC,
/* SCFS */ Ins_SCFS,
/* MD[0] */ Ins_MD,
/* MD[1] */ Ins_MD,
/* MPPEM */ Ins_MPPEM,
/* MPS */ Ins_MPS,
/* FlipON */ Ins_FLIPON,
/* FlipOFF */ Ins_FLIPOFF,
/* DEBUG */ Ins_DEBUG,
/* LT */ Ins_LT,
/* LTEQ */ Ins_LTEQ,
/* GT */ Ins_GT,
/* GTEQ */ Ins_GTEQ,
/* EQ */ Ins_EQ,
/* NEQ */ Ins_NEQ,
/* ODD */ Ins_ODD,
/* EVEN */ Ins_EVEN,
/* IF */ Ins_IF,
/* EIF */ Ins_EIF,
/* AND */ Ins_AND,
/* OR */ Ins_OR,
/* NOT */ Ins_NOT,
/* DeltaP1 */ Ins_DELTAP,
/* SDB */ Ins_SDB,
/* SDS */ Ins_SDS,
/* ADD */ Ins_ADD,
/* SUB */ Ins_SUB,
/* DIV */ Ins_DIV,
/* MUL */ Ins_MUL,
/* ABS */ Ins_ABS,
/* NEG */ Ins_NEG,
/* FLOOR */ Ins_FLOOR,
/* CEILING */ Ins_CEILING,
/* ROUND[0] */ Ins_ROUND,
/* ROUND[1] */ Ins_ROUND,
/* ROUND[2] */ Ins_ROUND,
/* ROUND[3] */ Ins_ROUND,
/* NROUND[0] */ Ins_NROUND,
/* NROUND[1] */ Ins_NROUND,
/* NROUND[2] */ Ins_NROUND,
/* NROUND[3] */ Ins_NROUND,
/* WCvtF */ Ins_WCVTF,
/* DeltaP2 */ Ins_DELTAP,
/* DeltaP3 */ Ins_DELTAP,
/* DeltaCn[0] */ Ins_DELTAC,
/* DeltaCn[1] */ Ins_DELTAC,
/* DeltaCn[2] */ Ins_DELTAC,
/* SROUND */ Ins_SROUND,
/* S45Round */ Ins_S45ROUND,
/* JROT */ Ins_JROT,
/* JROF */ Ins_JROF,
/* ROFF */ Ins_ROFF,
/* INS_0x7B */ Ins_UNKNOWN,
/* RUTG */ Ins_RUTG,
/* RDTG */ Ins_RDTG,
/* SANGW */ Ins_SANGW,
/* AA */ Ins_AA,
/* FlipPT */ Ins_FLIPPT,
/* FlipRgON */ Ins_FLIPRGON,
/* FlipRgOFF */ Ins_FLIPRGOFF,
/* INS_0x83 */ Ins_UNKNOWN,
/* INS_0x84 */ Ins_UNKNOWN,
/* ScanCTRL */ Ins_SCANCTRL,
/* SDPVTL[0] */ Ins_SDPVTL,
/* SDPVTL[1] */ Ins_SDPVTL,
/* GetINFO */ Ins_GETINFO,
/* IDEF */ Ins_IDEF,
/* ROLL */ Ins_ROLL,
/* MAX */ Ins_MAX,
/* MIN */ Ins_MIN,
/* ScanTYPE */ Ins_SCANTYPE,
/* InstCTRL */ Ins_INSTCTRL,
/* INS_0x8F */ Ins_UNKNOWN,
/* INS_0x90 */ Ins_UNKNOWN,
/* INS_0x91 */ Ins_UNKNOWN,
/* INS_0x92 */ Ins_UNKNOWN,
/* INS_0x93 */ Ins_UNKNOWN,
/* INS_0x94 */ Ins_UNKNOWN,
/* INS_0x95 */ Ins_UNKNOWN,
/* INS_0x96 */ Ins_UNKNOWN,
/* INS_0x97 */ Ins_UNKNOWN,
/* INS_0x98 */ Ins_UNKNOWN,
/* INS_0x99 */ Ins_UNKNOWN,
/* INS_0x9A */ Ins_UNKNOWN,
/* INS_0x9B */ Ins_UNKNOWN,
/* INS_0x9C */ Ins_UNKNOWN,
/* INS_0x9D */ Ins_UNKNOWN,
/* INS_0x9E */ Ins_UNKNOWN,
/* INS_0x9F */ Ins_UNKNOWN,
/* INS_0xA0 */ Ins_UNKNOWN,
/* INS_0xA1 */ Ins_UNKNOWN,
/* INS_0xA2 */ Ins_UNKNOWN,
/* INS_0xA3 */ Ins_UNKNOWN,
/* INS_0xA4 */ Ins_UNKNOWN,
/* INS_0xA5 */ Ins_UNKNOWN,
/* INS_0xA6 */ Ins_UNKNOWN,
/* INS_0xA7 */ Ins_UNKNOWN,
/* INS_0xA8 */ Ins_UNKNOWN,
/* INS_0xA9 */ Ins_UNKNOWN,
/* INS_0xAA */ Ins_UNKNOWN,
/* INS_0xAB */ Ins_UNKNOWN,
/* INS_0xAC */ Ins_UNKNOWN,
/* INS_0xAD */ Ins_UNKNOWN,
/* INS_0xAE */ Ins_UNKNOWN,
/* INS_0xAF */ Ins_UNKNOWN,
/* PushB[0] */ Ins_PUSHB,
/* PushB[1] */ Ins_PUSHB,
/* PushB[2] */ Ins_PUSHB,
/* PushB[3] */ Ins_PUSHB,
/* PushB[4] */ Ins_PUSHB,
/* PushB[5] */ Ins_PUSHB,
/* PushB[6] */ Ins_PUSHB,
/* PushB[7] */ Ins_PUSHB,
/* PushW[0] */ Ins_PUSHW,
/* PushW[1] */ Ins_PUSHW,
/* PushW[2] */ Ins_PUSHW,
/* PushW[3] */ Ins_PUSHW,
/* PushW[4] */ Ins_PUSHW,
/* PushW[5] */ Ins_PUSHW,
/* PushW[6] */ Ins_PUSHW,
/* PushW[7] */ Ins_PUSHW,
/* MDRP[00] */ Ins_MDRP,
/* MDRP[01] */ Ins_MDRP,
/* MDRP[02] */ Ins_MDRP,
/* MDRP[03] */ Ins_MDRP,
/* MDRP[04] */ Ins_MDRP,
/* MDRP[05] */ Ins_MDRP,
/* MDRP[06] */ Ins_MDRP,
/* MDRP[07] */ Ins_MDRP,
/* MDRP[08] */ Ins_MDRP,
/* MDRP[09] */ Ins_MDRP,
/* MDRP[10] */ Ins_MDRP,
/* MDRP[11] */ Ins_MDRP,
/* MDRP[12] */ Ins_MDRP,
/* MDRP[13] */ Ins_MDRP,
/* MDRP[14] */ Ins_MDRP,
/* MDRP[15] */ Ins_MDRP,
/* MDRP[16] */ Ins_MDRP,
/* MDRP[17] */ Ins_MDRP,
/* MDRP[18] */ Ins_MDRP,
/* MDRP[19] */ Ins_MDRP,
/* MDRP[20] */ Ins_MDRP,
/* MDRP[21] */ Ins_MDRP,
/* MDRP[22] */ Ins_MDRP,
/* MDRP[23] */ Ins_MDRP,
/* MDRP[24] */ Ins_MDRP,
/* MDRP[25] */ Ins_MDRP,
/* MDRP[26] */ Ins_MDRP,
/* MDRP[27] */ Ins_MDRP,
/* MDRP[28] */ Ins_MDRP,
/* MDRP[29] */ Ins_MDRP,
/* MDRP[30] */ Ins_MDRP,
/* MDRP[31] */ Ins_MDRP,
/* MIRP[00] */ Ins_MIRP,
/* MIRP[01] */ Ins_MIRP,
/* MIRP[02] */ Ins_MIRP,
/* MIRP[03] */ Ins_MIRP,
/* MIRP[04] */ Ins_MIRP,
/* MIRP[05] */ Ins_MIRP,
/* MIRP[06] */ Ins_MIRP,
/* MIRP[07] */ Ins_MIRP,
/* MIRP[08] */ Ins_MIRP,
/* MIRP[09] */ Ins_MIRP,
/* MIRP[10] */ Ins_MIRP,
/* MIRP[11] */ Ins_MIRP,
/* MIRP[12] */ Ins_MIRP,
/* MIRP[13] */ Ins_MIRP,
/* MIRP[14] */ Ins_MIRP,
/* MIRP[15] */ Ins_MIRP,
/* MIRP[16] */ Ins_MIRP,
/* MIRP[17] */ Ins_MIRP,
/* MIRP[18] */ Ins_MIRP,
/* MIRP[19] */ Ins_MIRP,
/* MIRP[20] */ Ins_MIRP,
/* MIRP[21] */ Ins_MIRP,
/* MIRP[22] */ Ins_MIRP,
/* MIRP[23] */ Ins_MIRP,
/* MIRP[24] */ Ins_MIRP,
/* MIRP[25] */ Ins_MIRP,
/* MIRP[26] */ Ins_MIRP,
/* MIRP[27] */ Ins_MIRP,
/* MIRP[28] */ Ins_MIRP,
/* MIRP[29] */ Ins_MIRP,
/* MIRP[30] */ Ins_MIRP,
/* MIRP[31] */ Ins_MIRP
};
#endif /* !TT_CONFIG_OPTION_INTERPRETER_SWITCH */
/*************************************************************************/
/* */
/* RUN */
/* */
/* This function executes a run of opcodes. It will exit in the */
/* following cases: */
/* */
/* - Errors (in which case it returns FALSE). */
/* */
/* - Reaching the end of the main code range (returns TRUE). */
/* Reaching the end of a code range within a function call is an */
/* error. */
/* */
/* - After executing one single opcode, if the flag `Instruction_Trap' */
/* is set to TRUE (returns TRUE). */
/* */
/* On exit with TRUE, test IP < CodeSize to know whether it comes from */
/* an instruction trap or a normal termination. */
/* */
/* */
/* Note: The documented DEBUG opcode pops a value from the stack. This */
/* behaviour is unsupported; here a DEBUG opcode is always an */
/* error. */
/* */
/* */
/* THIS IS THE INTERPRETER'S MAIN LOOP. */
/* */
/* Instructions appear in the specification's order. */
/* */
/*************************************************************************/
/* documentation is in ttinterp.h */
FT_EXPORT_DEF( FT_Error )
TT_RunIns( TT_ExecContext exc )
{
FT_Long ins_counter = 0; /* executed instructions counter */
FT_UShort i;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_Byte opcode_pattern[1][2] = {
/* #8 TypeMan Talk Align */
{
0x06, /* SPVTL */
0x7D, /* RDTG */
},
};
FT_UShort opcode_patterns = 1;
FT_UShort opcode_pointer[1] = { 0 };
FT_UShort opcode_size[1] = { 1 };
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#ifdef TT_CONFIG_OPTION_STATIC_RASTER
cur = *exc;
#endif
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
CUR.iup_called = FALSE;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* set CVT functions */
CUR.tt_metrics.ratio = 0;
if ( CUR.metrics.x_ppem != CUR.metrics.y_ppem )
{
/* non-square pixels, use the stretched routines */
CUR.func_read_cvt = Read_CVT_Stretched;
CUR.func_write_cvt = Write_CVT_Stretched;
CUR.func_move_cvt = Move_CVT_Stretched;
}
else
{
/* square pixels, use normal routines */
CUR.func_read_cvt = Read_CVT;
CUR.func_write_cvt = Write_CVT;
CUR.func_move_cvt = Move_CVT;
}
COMPUTE_Funcs();
COMPUTE_Round( (FT_Byte)exc->GS.round_state );
do
{
CUR.opcode = CUR.code[CUR.IP];
FT_TRACE7(( " " ));
FT_TRACE7(( opcode_name[CUR.opcode] ));
FT_TRACE7(( "\n" ));
if ( ( CUR.length = opcode_length[CUR.opcode] ) < 0 )
{
if ( CUR.IP + 1 >= CUR.codeSize )
goto LErrorCodeOverflow_;
CUR.length = 2 - CUR.length * CUR.code[CUR.IP + 1];
}
if ( CUR.IP + CUR.length > CUR.codeSize )
goto LErrorCodeOverflow_;
/* First, let's check for empty stack and overflow */
CUR.args = CUR.top - ( Pop_Push_Count[CUR.opcode] >> 4 );
/* `args' is the top of the stack once arguments have been popped. */
/* One can also interpret it as the index of the last argument. */
if ( CUR.args < 0 )
{
if ( CUR.pedantic_hinting )
{
CUR.error = FT_THROW( Too_Few_Arguments );
goto LErrorLabel_;
}
/* push zeroes onto the stack */
for ( i = 0; i < Pop_Push_Count[CUR.opcode] >> 4; i++ )
CUR.stack[i] = 0;
CUR.args = 0;
}
CUR.new_top = CUR.args + ( Pop_Push_Count[CUR.opcode] & 15 );
/* `new_top' is the new top of the stack, after the instruction's */
/* execution. `top' will be set to `new_top' after the `switch' */
/* statement. */
if ( CUR.new_top > CUR.stackSize )
{
CUR.error = FT_THROW( Stack_Overflow );
goto LErrorLabel_;
}
CUR.step_ins = TRUE;
CUR.error = FT_Err_Ok;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( SUBPIXEL_HINTING )
{
for ( i = 0; i < opcode_patterns; i++ )
{
if ( opcode_pointer[i] < opcode_size[i] &&
CUR.opcode == opcode_pattern[i][opcode_pointer[i]] )
{
opcode_pointer[i] += 1;
if ( opcode_pointer[i] == opcode_size[i] )
{
FT_TRACE7(( "sph: opcode ptrn: %d, %s %s\n",
i,
CUR.face->root.family_name,
CUR.face->root.style_name ));
switch ( i )
{
case 0:
break;
}
opcode_pointer[i] = 0;
}
}
else
opcode_pointer[i] = 0;
}
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#ifdef TT_CONFIG_OPTION_INTERPRETER_SWITCH
{
FT_Long* args = CUR.stack + CUR.args;
FT_Byte opcode = CUR.opcode;
#undef ARRAY_BOUND_ERROR
#define ARRAY_BOUND_ERROR goto Set_Invalid_Ref
switch ( opcode )
{
case 0x00: /* SVTCA y */
case 0x01: /* SVTCA x */
case 0x02: /* SPvTCA y */
case 0x03: /* SPvTCA x */
case 0x04: /* SFvTCA y */
case 0x05: /* SFvTCA x */
{
FT_Short AA, BB;
AA = (FT_Short)( ( opcode & 1 ) << 14 );
BB = (FT_Short)( AA ^ 0x4000 );
if ( opcode < 4 )
{
CUR.GS.projVector.x = AA;
CUR.GS.projVector.y = BB;
CUR.GS.dualVector.x = AA;
CUR.GS.dualVector.y = BB;
}
else
{
GUESS_VECTOR( projVector );
}
if ( ( opcode & 2 ) == 0 )
{
CUR.GS.freeVector.x = AA;
CUR.GS.freeVector.y = BB;
}
else
{
GUESS_VECTOR( freeVector );
}
COMPUTE_Funcs();
}
break;
case 0x06: /* SPvTL // */
case 0x07: /* SPvTL + */
DO_SPVTL
break;
case 0x08: /* SFvTL // */
case 0x09: /* SFvTL + */
DO_SFVTL
break;
case 0x0A: /* SPvFS */
DO_SPVFS
break;
case 0x0B: /* SFvFS */
DO_SFVFS
break;
case 0x0C: /* GPV */
DO_GPV
break;
case 0x0D: /* GFV */
DO_GFV
break;
case 0x0E: /* SFvTPv */
DO_SFVTPV
break;
case 0x0F: /* ISECT */
Ins_ISECT( EXEC_ARG_ args );
break;
case 0x10: /* SRP0 */
DO_SRP0
break;
case 0x11: /* SRP1 */
DO_SRP1
break;
case 0x12: /* SRP2 */
DO_SRP2
break;
case 0x13: /* SZP0 */
Ins_SZP0( EXEC_ARG_ args );
break;
case 0x14: /* SZP1 */
Ins_SZP1( EXEC_ARG_ args );
break;
case 0x15: /* SZP2 */
Ins_SZP2( EXEC_ARG_ args );
break;
case 0x16: /* SZPS */
Ins_SZPS( EXEC_ARG_ args );
break;
case 0x17: /* SLOOP */
DO_SLOOP
break;
case 0x18: /* RTG */
DO_RTG
break;
case 0x19: /* RTHG */
DO_RTHG
break;
case 0x1A: /* SMD */
DO_SMD
break;
case 0x1B: /* ELSE */
Ins_ELSE( EXEC_ARG_ args );
break;
case 0x1C: /* JMPR */
DO_JMPR
break;
case 0x1D: /* SCVTCI */
DO_SCVTCI
break;
case 0x1E: /* SSWCI */
DO_SSWCI
break;
case 0x1F: /* SSW */
DO_SSW
break;
case 0x20: /* DUP */
DO_DUP
break;
case 0x21: /* POP */
/* nothing :-) */
break;
case 0x22: /* CLEAR */
DO_CLEAR
break;
case 0x23: /* SWAP */
DO_SWAP
break;
case 0x24: /* DEPTH */
DO_DEPTH
break;
case 0x25: /* CINDEX */
DO_CINDEX
break;
case 0x26: /* MINDEX */
Ins_MINDEX( EXEC_ARG_ args );
break;
case 0x27: /* ALIGNPTS */
Ins_ALIGNPTS( EXEC_ARG_ args );
break;
case 0x28: /* ???? */
Ins_UNKNOWN( EXEC_ARG_ args );
break;
case 0x29: /* UTP */
Ins_UTP( EXEC_ARG_ args );
break;
case 0x2A: /* LOOPCALL */
Ins_LOOPCALL( EXEC_ARG_ args );
break;
case 0x2B: /* CALL */
Ins_CALL( EXEC_ARG_ args );
break;
case 0x2C: /* FDEF */
Ins_FDEF( EXEC_ARG_ args );
break;
case 0x2D: /* ENDF */
Ins_ENDF( EXEC_ARG_ args );
break;
case 0x2E: /* MDAP */
case 0x2F: /* MDAP */
Ins_MDAP( EXEC_ARG_ args );
break;
case 0x30: /* IUP */
case 0x31: /* IUP */
Ins_IUP( EXEC_ARG_ args );
break;
case 0x32: /* SHP */
case 0x33: /* SHP */
Ins_SHP( EXEC_ARG_ args );
break;
case 0x34: /* SHC */
case 0x35: /* SHC */
Ins_SHC( EXEC_ARG_ args );
break;
case 0x36: /* SHZ */
case 0x37: /* SHZ */
Ins_SHZ( EXEC_ARG_ args );
break;
case 0x38: /* SHPIX */
Ins_SHPIX( EXEC_ARG_ args );
break;
case 0x39: /* IP */
Ins_IP( EXEC_ARG_ args );
break;
case 0x3A: /* MSIRP */
case 0x3B: /* MSIRP */
Ins_MSIRP( EXEC_ARG_ args );
break;
case 0x3C: /* AlignRP */
Ins_ALIGNRP( EXEC_ARG_ args );
break;
case 0x3D: /* RTDG */
DO_RTDG
break;
case 0x3E: /* MIAP */
case 0x3F: /* MIAP */
Ins_MIAP( EXEC_ARG_ args );
break;
case 0x40: /* NPUSHB */
Ins_NPUSHB( EXEC_ARG_ args );
break;
case 0x41: /* NPUSHW */
Ins_NPUSHW( EXEC_ARG_ args );
break;
case 0x42: /* WS */
DO_WS
break;
Set_Invalid_Ref:
CUR.error = FT_THROW( Invalid_Reference );
break;
case 0x43: /* RS */
DO_RS
break;
case 0x44: /* WCVTP */
DO_WCVTP
break;
case 0x45: /* RCVT */
DO_RCVT
break;
case 0x46: /* GC */
case 0x47: /* GC */
Ins_GC( EXEC_ARG_ args );
break;
case 0x48: /* SCFS */
Ins_SCFS( EXEC_ARG_ args );
break;
case 0x49: /* MD */
case 0x4A: /* MD */
Ins_MD( EXEC_ARG_ args );
break;
case 0x4B: /* MPPEM */
DO_MPPEM
break;
case 0x4C: /* MPS */
DO_MPS
break;
case 0x4D: /* FLIPON */
DO_FLIPON
break;
case 0x4E: /* FLIPOFF */
DO_FLIPOFF
break;
case 0x4F: /* DEBUG */
DO_DEBUG
break;
case 0x50: /* LT */
DO_LT
break;
case 0x51: /* LTEQ */
DO_LTEQ
break;
case 0x52: /* GT */
DO_GT
break;
case 0x53: /* GTEQ */
DO_GTEQ
break;
case 0x54: /* EQ */
DO_EQ
break;
case 0x55: /* NEQ */
DO_NEQ
break;
case 0x56: /* ODD */
DO_ODD
break;
case 0x57: /* EVEN */
DO_EVEN
break;
case 0x58: /* IF */
Ins_IF( EXEC_ARG_ args );
break;
case 0x59: /* EIF */
/* do nothing */
break;
case 0x5A: /* AND */
DO_AND
break;
case 0x5B: /* OR */
DO_OR
break;
case 0x5C: /* NOT */
DO_NOT
break;
case 0x5D: /* DELTAP1 */
Ins_DELTAP( EXEC_ARG_ args );
break;
case 0x5E: /* SDB */
DO_SDB
break;
case 0x5F: /* SDS */
DO_SDS
break;
case 0x60: /* ADD */
DO_ADD
break;
case 0x61: /* SUB */
DO_SUB
break;
case 0x62: /* DIV */
DO_DIV
break;
case 0x63: /* MUL */
DO_MUL
break;
case 0x64: /* ABS */
DO_ABS
break;
case 0x65: /* NEG */
DO_NEG
break;
case 0x66: /* FLOOR */
DO_FLOOR
break;
case 0x67: /* CEILING */
DO_CEILING
break;
case 0x68: /* ROUND */
case 0x69: /* ROUND */
case 0x6A: /* ROUND */
case 0x6B: /* ROUND */
DO_ROUND
break;
case 0x6C: /* NROUND */
case 0x6D: /* NROUND */
case 0x6E: /* NRRUND */
case 0x6F: /* NROUND */
DO_NROUND
break;
case 0x70: /* WCVTF */
DO_WCVTF
break;
case 0x71: /* DELTAP2 */
case 0x72: /* DELTAP3 */
Ins_DELTAP( EXEC_ARG_ args );
break;
case 0x73: /* DELTAC0 */
case 0x74: /* DELTAC1 */
case 0x75: /* DELTAC2 */
Ins_DELTAC( EXEC_ARG_ args );
break;
case 0x76: /* SROUND */
DO_SROUND
break;
case 0x77: /* S45Round */
DO_S45ROUND
break;
case 0x78: /* JROT */
DO_JROT
break;
case 0x79: /* JROF */
DO_JROF
break;
case 0x7A: /* ROFF */
DO_ROFF
break;
case 0x7B: /* ???? */
Ins_UNKNOWN( EXEC_ARG_ args );
break;
case 0x7C: /* RUTG */
DO_RUTG
break;
case 0x7D: /* RDTG */
DO_RDTG
break;
case 0x7E: /* SANGW */
case 0x7F: /* AA */
/* nothing - obsolete */
break;
case 0x80: /* FLIPPT */
Ins_FLIPPT( EXEC_ARG_ args );
break;
case 0x81: /* FLIPRGON */
Ins_FLIPRGON( EXEC_ARG_ args );
break;
case 0x82: /* FLIPRGOFF */
Ins_FLIPRGOFF( EXEC_ARG_ args );
break;
case 0x83: /* UNKNOWN */
case 0x84: /* UNKNOWN */
Ins_UNKNOWN( EXEC_ARG_ args );
break;
case 0x85: /* SCANCTRL */
Ins_SCANCTRL( EXEC_ARG_ args );
break;
case 0x86: /* SDPVTL */
case 0x87: /* SDPVTL */
Ins_SDPVTL( EXEC_ARG_ args );
break;
case 0x88: /* GETINFO */
Ins_GETINFO( EXEC_ARG_ args );
break;
case 0x89: /* IDEF */
Ins_IDEF( EXEC_ARG_ args );
break;
case 0x8A: /* ROLL */
Ins_ROLL( EXEC_ARG_ args );
break;
case 0x8B: /* MAX */
DO_MAX
break;
case 0x8C: /* MIN */
DO_MIN
break;
case 0x8D: /* SCANTYPE */
Ins_SCANTYPE( EXEC_ARG_ args );
break;
case 0x8E: /* INSTCTRL */
Ins_INSTCTRL( EXEC_ARG_ args );
break;
case 0x8F:
Ins_UNKNOWN( EXEC_ARG_ args );
break;
default:
if ( opcode >= 0xE0 )
Ins_MIRP( EXEC_ARG_ args );
else if ( opcode >= 0xC0 )
Ins_MDRP( EXEC_ARG_ args );
else if ( opcode >= 0xB8 )
Ins_PUSHW( EXEC_ARG_ args );
else if ( opcode >= 0xB0 )
Ins_PUSHB( EXEC_ARG_ args );
else
Ins_UNKNOWN( EXEC_ARG_ args );
}
}
#else
Instruct_Dispatch[CUR.opcode]( EXEC_ARG_ &CUR.stack[CUR.args] );
#endif /* TT_CONFIG_OPTION_INTERPRETER_SWITCH */
if ( CUR.error )
{
switch ( CUR.error )
{
/* looking for redefined instructions */
case FT_ERR( Invalid_Opcode ):
{
TT_DefRecord* def = CUR.IDefs;
TT_DefRecord* limit = def + CUR.numIDefs;
for ( ; def < limit; def++ )
{
if ( def->active && CUR.opcode == (FT_Byte)def->opc )
{
TT_CallRec* callrec;
if ( CUR.callTop >= CUR.callSize )
{
CUR.error = FT_THROW( Invalid_Reference );
goto LErrorLabel_;
}
callrec = &CUR.callStack[CUR.callTop];
callrec->Caller_Range = CUR.curRange;
callrec->Caller_IP = CUR.IP + 1;
callrec->Cur_Count = 1;
callrec->Cur_Restart = def->start;
callrec->Cur_End = def->end;
if ( INS_Goto_CodeRange( def->range, def->start ) == FAILURE )
goto LErrorLabel_;
goto LSuiteLabel_;
}
}
}
CUR.error = FT_THROW( Invalid_Opcode );
goto LErrorLabel_;
#if 0
break; /* Unreachable code warning suppression. */
/* Leave to remind in case a later change the editor */
/* to consider break; */
#endif
default:
goto LErrorLabel_;
#if 0
break;
#endif
}
}
CUR.top = CUR.new_top;
if ( CUR.step_ins )
CUR.IP += CUR.length;
/* increment instruction counter and check if we didn't */
/* run this program for too long (e.g. infinite loops). */
if ( ++ins_counter > MAX_RUNNABLE_OPCODES )
return FT_THROW( Execution_Too_Long );
LSuiteLabel_:
if ( CUR.IP >= CUR.codeSize )
{
if ( CUR.callTop > 0 )
{
CUR.error = FT_THROW( Code_Overflow );
goto LErrorLabel_;
}
else
goto LNo_Error_;
}
} while ( !CUR.instruction_trap );
LNo_Error_:
#ifdef TT_CONFIG_OPTION_STATIC_RASTER
*exc = cur;
#endif
return FT_Err_Ok;
LErrorCodeOverflow_:
CUR.error = FT_THROW( Code_Overflow );
LErrorLabel_:
#ifdef TT_CONFIG_OPTION_STATIC_RASTER
*exc = cur;
#endif
/* If any errors have occurred, function tables may be broken. */
/* Force a re-execution of `prep' and `fpgm' tables if no */
/* bytecode debugger is run. */
if ( CUR.error && !CUR.instruction_trap )
{
FT_TRACE1(( " The interpreter returned error 0x%x\n", CUR.error ));
exc->size->cvt_ready = FALSE;
}
return CUR.error;
}
#endif /* TT_USE_BYTECODE_INTERPRETER */
/* END */