ref: 51f245a615954cf41f5683b9dbae1e03e5d7c430
dir: /src/truetype/ttinterp.c/
/***************************************************************************/
/* */
/* ttinterp.c */
/* */
/* TrueType bytecode interpreter (body). */
/* */
/* Copyright 1996-2001 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. */
/* */
/***************************************************************************/
#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_CALC_H
#include FT_TRIGONOMETRY_H
#include FT_SYSTEM_H
#include "ttinterp.h"
#include "tterrors.h"
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
#define TT_MULFIX FT_MulFix
#define TT_MULDIV FT_MulDiv
#define TT_INT64 FT_Int64
/*************************************************************************/
/* */
/* 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
#undef NO_APPLE_PATENT
#define APPLE_THRESHOLD 0x4000000L
/*************************************************************************/
/* */
/* 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 */
/* limitet to a maximal 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 */
#else /* static implementation */
#define CUR cur
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 `exec' is unused in a function, to avoid */
/* stupid warnings from pedantic compilers. */
/* */
#define FT_UNUSED_EXEC FT_UNUSED( CUR )
/*************************************************************************/
/* */
/* 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 )
/*************************************************************************/
/* */
/* The following macros hide the use of EXEC_ARG and EXEC_ARG_ to */
/* increase readabilty 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_project( x, y ) \
CUR.func_project( EXEC_ARG_ x, y )
#define CUR_Func_move( z, p, d ) \
CUR.func_move( EXEC_ARG_ z, p, d )
#define CUR_Func_dualproj( x, y ) \
CUR.func_dualproj( EXEC_ARG_ x, y )
#define CUR_Func_freeProj( x, y ) \
CUR.func_freeProj( EXEC_ARG_ x, y )
#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 )
/*************************************************************************/
/* */
/* Instruction dispatch function, as used by the interpreter. */
/* */
typedef void (*TInstruction_Function)( INS_ARG );
/*************************************************************************/
/* */
/* A simple bounds-checking macro. */
/* */
#define BOUNDS( x, n ) ( (FT_UInt)(x) >= (FT_UInt)(n) )
#undef SUCCESS
#define SUCCESS 0
#undef FAILURE
#define FAILURE 1
/*************************************************************************/
/* */
/* 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 TT_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 TT_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 TT_Err_Ok;
}
/*************************************************************************/
/* */
/* EXECUTION CONTEXT ROUTINES */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* TT_Destroy_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_Destroy_Context( TT_ExecContext exec,
FT_Memory memory )
{
/* free composite load stack */
FREE( exec->loadStack );
exec->loadSize = 0;
/* points zone */
exec->maxPoints = 0;
exec->maxContours = 0;
/* free stack */
FREE( exec->stack );
exec->stackSize = 0;
/* free call stack */
FREE( exec->callStack );
exec->callSize = 0;
exec->callTop = 0;
/* free glyph code range */
FREE( exec->glyphIns );
exec->glyphSize = 0;
exec->size = NULL;
exec->face = NULL;
FREE( exec );
return TT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* Init_Context */
/* */
/* <Description> */
/* Initializes a context object. */
/* */
/* <Input> */
/* memory :: A handle to the parent memory object. */
/* */
/* face :: A handle to the source TrueType face 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,
TT_Face face,
FT_Memory memory )
{
FT_Error error;
FT_TRACE1(( "Init_Context: new object at 0x%08p, parent = 0x%08p\n",
exec, face ));
exec->memory = memory;
exec->callSize = 32;
if ( ALLOC_ARRAY( exec->callStack, exec->callSize, TT_CallRec ) )
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->loadSize = 0;
exec->glyphSize = 0;
exec->stack = NULL;
exec->loadStack = NULL;
exec->glyphIns = NULL;
exec->face = face;
exec->size = NULL;
return TT_Err_Ok;
Fail_Memory:
FT_ERROR(( "Init_Context: not enough memory for 0x%08lx\n",
(FT_Long)exec ));
TT_Destroy_Context( exec, memory );
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. */
/* */
static FT_Error
Update_Max( FT_Memory memory,
FT_ULong* size,
FT_Long multiplier,
void** buff,
FT_ULong new_max )
{
FT_Error error;
if ( *size < new_max )
{
FREE( *buff );
if ( ALLOC( *buff, new_max * multiplier ) )
return error;
*size = new_max;
}
return TT_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->root.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;
}
error = Update_Max( exec->memory,
&exec->loadSize,
sizeof ( TT_SubGlyphRec ),
(void**)&exec->loadStack,
exec->face->max_components + 1 );
if ( error )
return error;
/* 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->instruction_trap = FALSE;
return TT_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;
/* XXXX: 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 TT_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> */
/* TrueTyoe 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 ) )
!= TT_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;
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 TT_Err_Ok;
#endif
}
const TT_GraphicsState tt_default_graphics_state =
{
0, 0, 0,
{ 0x4000, 0 },
{ 0x4000, 0 },
{ 0x4000, 0 },
1, 64, 1,
TRUE, 68, 0, 0, 9, 3,
0, FALSE, 2, 1, 1, 1
};
/* documentation is in ttinterp.h */
FT_EXPORT_DEF( TT_ExecContext )
TT_New_Context( TT_Face face )
{
TT_Driver driver;
TT_ExecContext exec;
FT_Memory memory;
if ( !face )
return 0;
driver = (TT_Driver)face->root.driver;
memory = driver->root.root.memory;
exec = driver->context;
if ( !driver->context )
{
FT_Error error;
/* allocate object */
if ( ALLOC( exec, sizeof ( *exec ) ) )
goto Exit;
/* initialize it */
error = Init_Context( exec, face, memory );
if ( error )
goto Fail;
/* store it into the driver */
driver->context = exec;
}
Exit:
return driver->context;
Fail:
FREE( exec );
return 0;
}
/*************************************************************************/
/* */
/* <Function> */
/* TT_Done_Context */
/* */
/* <Description> */
/* Discards an execution context. */
/* */
/* <Input> */
/* 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_Done_Context( TT_ExecContext exec )
{
/* Nothing at all for now */
FT_UNUSED( exec );
return TT_Err_Ok;
}
/* return length of given vector */
#ifdef FT_CONFIG_OPTION_OLD_CALCS
static FT_F26Dot6
Norm( FT_F26Dot6 X,
FT_F26Dot6 Y )
{
TT_INT64 T1, T2;
MUL_64( X, X, T1 );
MUL_64( Y, Y, T2 );
ADD_64( T1, T2, T1 );
return (FT_F26Dot6)SQRT_64( T1 );
}
#else /* !FT_CONFIG_OPTION_OLD_CALCS */
static FT_F26Dot6
Norm( FT_F26Dot6 X,
FT_F26Dot6 Y )
{
FT_Vector v;
v.x = X;
v.y = Y;
return FT_Vector_Length( &v );
}
#endif /* FT_CONFIG_OPTION_OLD_CALCS */
/*************************************************************************/
/* */
/* 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. */
/* */
/* Note that for opcodes with a varying number of parameters, either 0 */
/* or 1 arg is verified before execution, depending on the nature of the */
/* instruction: */
/* */
/* - if the number of arguments is given by the bytecode stream or the */
/* loop variable, 0 is chosen. */
/* */
/* - if the first argument is a count n that is followed by arguments */
/* a1 .. an, then 1 is chosen. */
/* */
/*************************************************************************/
#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 ),
/* SDVPTL[0] */ PACK( 2, 0 ),
/* SDVPTL[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 )
};
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,-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, 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
};
static
const FT_Vector Null_Vector = {0,0};
#undef PACK
#undef NULL_Vector
#define NULL_Vector (FT_Vector*)&Null_Vector
/*************************************************************************/
/* */
/* <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 )
return CUR.tt_metrics.ratio;
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_Long x, y;
x = TT_MULDIV( CUR.GS.projVector.x, CUR.tt_metrics.x_ratio, 0x4000 );
y = TT_MULDIV( CUR.GS.projVector.y, CUR.tt_metrics.y_ratio, 0x4000 );
CUR.tt_metrics.ratio = Norm( x, y );
}
return CUR.tt_metrics.ratio;
}
static FT_Long
Current_Ppem( EXEC_OP )
{
return TT_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 index )
{
return CUR.cvt[index];
}
FT_CALLBACK_DEF( FT_F26Dot6 )
Read_CVT_Stretched( EXEC_OP_ FT_ULong index )
{
return TT_MULFIX( CUR.cvt[index], CURRENT_Ratio() );
}
FT_CALLBACK_DEF( void )
Write_CVT( EXEC_OP_ FT_ULong index,
FT_F26Dot6 value )
{
CUR.cvt[index] = value;
}
FT_CALLBACK_DEF( void )
Write_CVT_Stretched( EXEC_OP_ FT_ULong index,
FT_F26Dot6 value )
{
CUR.cvt[index] = FT_DivFix( value, CURRENT_Ratio() );
}
FT_CALLBACK_DEF( void )
Move_CVT( EXEC_OP_ FT_ULong index,
FT_F26Dot6 value )
{
CUR.cvt[index] += value;
}
FT_CALLBACK_DEF( void )
Move_CVT_Stretched( EXEC_OP_ FT_ULong index,
FT_F26Dot6 value )
{
CUR.cvt[index] += 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 = TT_Err_Bad_Argument;
return FAILURE;
}
range = &CUR.codeRangeTable[aRange - 1];
if ( range->base == NULL ) /* invalid coderange */
{
CUR.error = TT_Err_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 = TT_Err_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;
v = CUR.GS.freeVector.x;
if ( v != 0 )
{
#ifdef NO_APPLE_PATENT
if ( ABS( CUR.F_dot_P ) > APPLE_THRESHOLD )
zone->cur[point].x += distance;
#else
zone->cur[point].x += TT_MULDIV( distance,
v * 0x10000L,
CUR.F_dot_P );
#endif
zone->tags[point] |= FT_Curve_Tag_Touch_X;
}
v = CUR.GS.freeVector.y;
if ( v != 0 )
{
#ifdef NO_APPLE_PATENT
if ( ABS( CUR.F_dot_P ) > APPLE_THRESHOLD )
zone->cur[point].y += distance;
#else
zone->cur[point].y += TT_MULDIV( distance,
v * 0x10000L,
CUR.F_dot_P );
#endif
zone->tags[point] |= FT_Curve_Tag_Touch_Y;
}
}
/*************************************************************************/
/* */
/* 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;
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;
}
/*************************************************************************/
/* */
/* <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 ( 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 ( val > 0 )
val &= ~63;
else
val = 0;
}
else
{
val = -( ( compensation - distance + 32 ) & -64 );
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 = ( ( distance + compensation ) & -64 ) + 32;
if ( val < 0 )
val = 0;
}
else
{
val = -( ( (compensation - distance) & -64 ) + 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 ( 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 ( val > 0 )
val &= ~63;
else
val = 0;
}
else
{
val = -( ( compensation - distance + 63 ) & -64 );
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 ( val > 0 )
val &= ~31;
else
val = 0;
}
else
{
val = -( ( compensation - distance + 16 ) & -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 ( 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 ( 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 :: Grid period */
/* selector :: 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 = GridPeriod * 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_Vector* v1,
FT_Vector* v2 )
{
return TT_MULDIV( v1->x - v2->x, CUR.GS.projVector.x, 0x4000 ) +
TT_MULDIV( v1->y - v2->y, CUR.GS.projVector.y, 0x4000 );
}
/*************************************************************************/
/* */
/* <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_Vector* v1,
FT_Vector* v2 )
{
return TT_MULDIV( v1->x - v2->x, CUR.GS.dualVector.x, 0x4000 ) +
TT_MULDIV( v1->y - v2->y, CUR.GS.dualVector.y, 0x4000 );
}
/*************************************************************************/
/* */
/* <Function> */
/* Free_Project */
/* */
/* <Description> */
/* Computes the projection of the vector given by (v2-v1) along the */
/* current freedom vector. */
/* */
/* <Input> */
/* v1 :: First input vector. */
/* v2 :: Second input vector. */
/* */
/* <Return> */
/* The distance in F26dot6 format. */
/* */
static FT_F26Dot6
Free_Project( EXEC_OP_ FT_Vector* v1,
FT_Vector* v2 )
{
return TT_MULDIV( v1->x - v2->x, CUR.GS.freeVector.x, 0x4000 ) +
TT_MULDIV( v1->y - v2->y, CUR.GS.freeVector.y, 0x4000 );
}
/*************************************************************************/
/* */
/* <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_Vector* v1,
FT_Vector* v2 )
{
FT_UNUSED_EXEC;
return ( v1->x - v2->x );
}
/*************************************************************************/
/* */
/* <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_Vector* v1,
FT_Vector* v2 )
{
FT_UNUSED_EXEC;
return ( v1->y - v2->y );
}
/*************************************************************************/
/* */
/* <Function> */
/* Compute_Funcs */
/* */
/* <Description> */
/* Computes the projection and movement function pointers according */
/* to the current graphics state. */
/* */
static void
Compute_Funcs( EXEC_OP )
{
if ( CUR.GS.freeVector.x == 0x4000 )
{
CUR.func_freeProj = (TT_Project_Func)Project_x;
CUR.F_dot_P = CUR.GS.projVector.x * 0x10000L;
}
else
{
if ( CUR.GS.freeVector.y == 0x4000 )
{
CUR.func_freeProj = (TT_Project_Func)Project_y;
CUR.F_dot_P = CUR.GS.projVector.y * 0x10000L;
}
else
{
CUR.func_freeProj = (TT_Project_Func)Free_Project;
CUR.F_dot_P = (FT_Long)CUR.GS.projVector.x * CUR.GS.freeVector.x * 4 +
(FT_Long)CUR.GS.projVector.y * CUR.GS.freeVector.y * 4;
}
}
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;
if ( CUR.F_dot_P == 0x40000000L )
{
if ( CUR.GS.freeVector.x == 0x4000 )
CUR.func_move = (TT_Move_Func)Direct_Move_X;
else
{
if ( CUR.GS.freeVector.y == 0x4000 )
CUR.func_move = (TT_Move_Func)Direct_Move_Y;
}
}
/* at small sizes, F_dot_P can become too small, resulting */
/* in overflows and `spikes' in a number of glyphs like `w'. */
if ( ABS( CUR.F_dot_P ) < 0x4000000L )
CUR.F_dot_P = 0x40000000L;
/* 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. */
/* */
#ifdef FT_CONFIG_OPTION_OLD_CALCS
static FT_Bool
Normalize( EXEC_OP_ FT_F26Dot6 Vx,
FT_F26Dot6 Vy,
FT_UnitVector* R )
{
FT_F26Dot6 W;
FT_Bool S1, S2;
FT_UNUSED_EXEC;
if ( ABS( Vx ) < 0x10000L && ABS( Vy ) < 0x10000L )
{
Vx *= 0x100;
Vy *= 0x100;
W = Norm( Vx, Vy );
if ( W == 0 )
{
/* XXX: UNDOCUMENTED! It seems that it is possible to try */
/* to normalize the vector (0,0). Return immediately. */
return SUCCESS;
}
R->x = (FT_F2Dot14)FT_MulDiv( Vx, 0x4000L, W );
R->y = (FT_F2Dot14)FT_MulDiv( Vy, 0x4000L, W );
return SUCCESS;
}
W = Norm( Vx, Vy );
Vx = FT_MulDiv( Vx, 0x4000L, W );
Vy = FT_MulDiv( Vy, 0x4000L, W );
W = Vx * Vx + Vy * Vy;
/* Now, we want that Sqrt( W ) = 0x4000 */
/* Or 0x1000000 <= W < 0x1004000 */
if ( Vx < 0 )
{
Vx = -Vx;
S1 = TRUE;
}
else
S1 = FALSE;
if ( Vy < 0 )
{
Vy = -Vy;
S2 = TRUE;
}
else
S2 = FALSE;
while ( W < 0x1000000L )
{
/* We need to increase W by a minimal amount */
if ( Vx < Vy )
Vx++;
else
Vy++;
W = Vx * Vx + Vy * Vy;
}
while ( W >= 0x1004000L )
{
/* We need to decrease W by a minimal amount */
if ( Vx < Vy )
Vx--;
else
Vy--;
W = Vx * Vx + Vy * Vy;
}
/* Note that in various cases, we can only */
/* compute a Sqrt(W) of 0x3FFF, eg. Vx = Vy */
if ( S1 )
Vx = -Vx;
if ( S2 )
Vy = -Vy;
R->x = (FT_F2Dot14)Vx; /* Type conversion */
R->y = (FT_F2Dot14)Vy; /* Type conversion */
return SUCCESS;
}
#else
static FT_Bool
Normalize( EXEC_OP_ FT_F26Dot6 Vx,
FT_F26Dot6 Vy,
FT_UnitVector* R )
{
FT_Vector v;
FT_Angle angle;
FT_UNUSED_EXEC;
angle = FT_Atan2( Vx, Vy );
FT_Vector_Unit( &v, angle );
R->x = (short)(v.x >> 2);
R->y = (short)(v.y >> 2);
return SUCCESS;
}
#endif /* FT_CONFIG_OPTION_OLD_CALCS */
/*************************************************************************/
/* */
/* 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 = TT_Err_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 ( ( 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; \
\
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; \
\
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; \
COMPUTE_Funcs(); \
}
#define DO_SFVTL \
if ( INS_SxVTL( (FT_UShort)args[1], \
(FT_UShort)args[0], \
CUR.opcode, \
&CUR.GS.freeVector ) == SUCCESS ) \
COMPUTE_Funcs();
#define DO_SFVTPV \
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; \
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 ); \
COMPUTE_Funcs(); \
}
#define DO_GPV \
args[0] = CUR.GS.projVector.x; \
args[1] = CUR.GS.projVector.y;
#define DO_GFV \
args[0] = CUR.GS.freeVector.x; \
args[1] = CUR.GS.freeVector.y;
#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 = TT_Err_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];
/* XXX: UNDOCUMENTED! or bug in the Windows engine? */
/* */
/* It seems that the value that is read here is */
/* expressed in 16.16 format rather than in font */
/* units. */
/* */
#define DO_SSW \
CUR.GS.single_width_value = (FT_F26Dot6)( args[0] >> 10 );
#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 ) \
CUR.error = TT_Err_Invalid_Reference; \
else \
args[0] = CUR.stack[CUR.args - L]; \
}
#define DO_JROT \
if ( args[1] != 0 ) \
{ \
CUR.IP += args[0]; \
CUR.step_ins = FALSE; \
}
#define DO_JMPR \
CUR.IP += args[0]; \
CUR.step_ins = FALSE;
#define DO_JROF \
if ( args[1] == 0 ) \
{ \
CUR.IP += args[0]; \
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 = TT_Err_Divide_By_Zero; \
else \
args[0] = TT_MULDIV( args[0], 64L, args[1] );
#define DO_MUL \
args[0] = TT_MULDIV( args[0], args[1], 64L );
#define DO_ABS \
args[0] = ABS( args[0] );
#define DO_NEG \
args[0] = -args[0];
#define DO_FLOOR \
args[0] &= -64;
#define DO_CEILING \
args[0] = ( args[0] + 63 ) & -64;
#define DO_RS \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDS( I, CUR.storeSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
{ \
ARRAY_BOUND_ERROR; \
} \
else \
args[0] = 0; \
} \
else \
args[0] = CUR.storage[I]; \
}
#define DO_WS \
{ \
FT_ULong I = (FT_ULong)args[0]; \
\
\
if ( BOUNDS( 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 ( BOUNDS( 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 ( BOUNDS( 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 ( BOUNDS( I, CUR.cvtSize ) ) \
{ \
if ( CUR.pedantic_hinting ) \
{ \
ARRAY_BOUND_ERROR; \
} \
} \
else \
CUR.cvt[I] = TT_MULFIX( args[1], CUR.tt_metrics.scale ); \
}
#define DO_DEBUG \
CUR.error = TT_Err_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 = TT_Err_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 )
{
CUR.error = TT_Err_Invalid_Reference;
return;
}
K = CUR.stack[CUR.args - L];
MEM_Move( &CUR.stack[CUR.args - L ],
&CUR.stack[CUR.args - L + 1],
( L - 1 ) * sizeof ( FT_Long ) );
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 = CUR.code[CUR.IP + 1] + 2;
}
if ( CUR.IP + CUR.length <= CUR.codeSize )
return SUCCESS;
}
Fail_Overflow:
CUR.error = TT_Err_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;
/* 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 = TT_Err_Too_Many_Function_Defs;
return;
}
CUR.numFDefs++;
}
rec->range = CUR.curRange;
rec->opc = n;
rec->start = CUR.IP + 1;
rec->active = TRUE;
if ( n > CUR.maxFunc )
CUR.maxFunc = n;
/* 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 = TT_Err_Nested_DEFS;
return;
case 0x2D: /* ENDF */
return;
}
}
}
/*************************************************************************/
/* */
/* ENDF[]: END Function definition */
/* Opcode range: 0x2D */
/* Stack: --> */
/* */
static void
Ins_ENDF( INS_ARG )
{
TT_CallRec* pRec;
FT_UNUSED_ARG;
if ( CUR.callTop <= 0 ) /* We encountered an ENDF without a call */
{
CUR.error = TT_Err_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 intruction 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 ( BOUNDS( 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;
/* check the call stack */
if ( CUR.callTop >= CUR.callSize )
{
CUR.error = TT_Err_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;
CUR.callTop++;
INS_Goto_CodeRange( def->range,
def->start );
CUR.step_ins = FALSE;
return;
Fail:
CUR.error = TT_Err_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 ( BOUNDS( 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;
/* check stack */
if ( CUR.callTop >= CUR.callSize )
{
CUR.error = TT_Err_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;
CUR.callTop++;
INS_Goto_CodeRange( def->range, def->start );
CUR.step_ins = FALSE;
}
return;
Fail:
CUR.error = TT_Err_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 = TT_Err_Too_Many_Instruction_Defs;
return;
}
CUR.numIDefs++;
}
def->opc = args[0];
def->start = CUR.IP+1;
def->range = CUR.curRange;
def->active = TRUE;
if ( (FT_ULong)args[0] > CUR.maxIns )
CUR.maxIns = 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 = TT_Err_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 = TT_Err_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 = TT_Err_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 = TT_Err_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 = TT_Err_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 */
/* */
/* BULLSHIT: 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 ( BOUNDS( L, CUR.zp2.n_points ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = TT_Err_Invalid_Reference;
return;
}
else
R = 0;
}
else
{
if ( CUR.opcode & 1 )
R = CUR_Func_dualproj( CUR.zp2.org + L, NULL_Vector );
else
R = CUR_Func_project( CUR.zp2.cur + L, NULL_Vector );
}
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 = TT_Err_Invalid_Reference;
return;
}
K = CUR_Func_project( CUR.zp2.cur + L, NULL_Vector );
CUR_Func_move( &CUR.zp2, L, args[1] - K );
/* not part of the specs, but here for safety */
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 */
/* */
/* BULLSHIT: Measure taken in the original glyph must be along the dual */
/* projection vector. */
/* */
/* Second BULLSHIT: Flag attributes are inverted! */
/* 0 => measure distance in original outline */
/* 1 => measure distance in grid-fitted outline */
/* */
/* Third one: `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 = TT_Err_Invalid_Reference;
return;
}
D = 0;
}
else
{
if ( CUR.opcode & 1 )
D = CUR_Func_project( CUR.zp0.cur + L, CUR.zp1.cur + K );
else
D = CUR_Func_dualproj( CUR.zp0.org + L, CUR.zp1.org + K );
}
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 */
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 = TT_Err_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 ( ( CUR.opcode & 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 ( ( CUR.opcode & 1 ) != 0 )
{
C = B; /* counter clockwise rotation */
B = A;
A = -C;
}
NORMalize( A, B, &CUR.GS.projVector );
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 = TT_Err_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 = TT_Err_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 = TT_Err_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 = TT_Err_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 = TT_Err_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;
}
A *= 64;
#if 0
if ( (args[0] & 0x100) != 0 && CUR.metrics.pointSize <= A )
CUR.GS.scan_control = TRUE;
#endif
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 0
if ( (args[0] & 0x800) != 0 && CUR.metrics.pointSize > A )
CUR.GS.scan_control = FALSE;
#endif
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 )
{
/* for compatibility with future enhancements, */
/* we must ignore new modes */
if ( args[0] >= 0 && args[0] <= 5 )
{
if ( args[0] == 3 )
args[0] = 2;
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 )
{
CUR.error = TT_Err_Too_Few_Arguments;
return;
}
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 = TT_Err_Invalid_Reference;
return;
}
}
else
CUR.pts.tags[point] ^= FT_Curve_Tag_On;
CUR.GS.loop--;
}
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 = TT_Err_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 = TT_Err_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_GlyphZone 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 = TT_Err_Invalid_Reference;
return FAILURE;
}
*zone = zp;
*refp = p;
d = CUR_Func_project( zp.cur + p, zp.org + p );
#ifdef NO_APPLE_PATENT
*x = TT_MULDIV( d, CUR.GS.freeVector.x, 0x4000 );
*y = TT_MULDIV( d, CUR.GS.freeVector.y, 0x4000 );
#else
*x = TT_MULDIV( d,
(FT_Long)CUR.GS.freeVector.x * 0x10000L,
CUR.F_dot_P );
*y = TT_MULDIV( d,
(FT_Long)CUR.GS.freeVector.y * 0x10000L,
CUR.F_dot_P );
#endif /* NO_APPLE_PATENT */
return SUCCESS;
}
static void
Move_Zp2_Point( EXEC_OP_ FT_UShort point,
FT_F26Dot6 dx,
FT_F26Dot6 dy,
FT_Bool touch )
{
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_GlyphZone zp;
FT_UShort refp;
FT_F26Dot6 dx,
dy;
FT_UShort point;
FT_UNUSED_ARG;
if ( CUR.top < CUR.GS.loop )
{
CUR.error = TT_Err_Invalid_Reference;
return;
}
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 = TT_Err_Invalid_Reference;
return;
}
}
else
/* XXX: UNDOCUMENTED! SHP touches the points */
MOVE_Zp2_Point( point, dx, dy, TRUE );
CUR.GS.loop--;
}
CUR.GS.loop = 1;
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* SHC[a]: SHift Contour */
/* Opcode range: 0x34-35 */
/* Stack: uint32 --> */
/* */
static void
Ins_SHC( INS_ARG )
{
TT_GlyphZone zp;
FT_UShort refp;
FT_F26Dot6 dx,
dy;
FT_Short contour;
FT_UShort first_point, last_point, i;
contour = (FT_UShort)args[0];
if ( BOUNDS( contour, CUR.pts.n_contours ) )
{
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_Invalid_Reference;
return;
}
if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) )
return;
if ( contour == 0 )
first_point = 0;
else
first_point = (FT_UShort)(CUR.pts.contours[contour - 1] + 1);
last_point = CUR.pts.contours[contour];
/* XXX: this is probably wrong... at least it prevents memory */
/* corruption when zp2 is the twilight zone */
if ( last_point > CUR.zp2.n_points )
{
if ( CUR.zp2.n_points > 0 )
last_point = (FT_UShort)(CUR.zp2.n_points - 1);
else
last_point = 0;
}
/* XXX: UNDOCUMENTED! SHC doesn't touch the points */
for ( i = first_point; i <= last_point; i++ )
{
if ( zp.cur != CUR.zp2.cur || refp != i )
MOVE_Zp2_Point( i, dx, dy, FALSE );
}
}
/*************************************************************************/
/* */
/* SHZ[a]: SHift Zone */
/* Opcode range: 0x36-37 */
/* Stack: uint32 --> */
/* */
static void
Ins_SHZ( INS_ARG )
{
TT_GlyphZone zp;
FT_UShort refp;
FT_F26Dot6 dx,
dy;
FT_UShort last_point, i;
if ( BOUNDS( args[0], 2 ) )
{
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_Invalid_Reference;
return;
}
if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) )
return;
if ( CUR.zp2.n_points > 0 )
last_point = (FT_UShort)(CUR.zp2.n_points - 1);
else
last_point = 0;
/* XXX: UNDOCUMENTED! SHZ doesn't touch the points */
for ( i = 0; i <= last_point; 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;
if ( CUR.top < CUR.GS.loop + 1 )
{
CUR.error = TT_Err_Invalid_Reference;
return;
}
dx = TT_MULDIV( args[0],
(FT_Long)CUR.GS.freeVector.x,
0x4000 );
dy = TT_MULDIV( args[0],
(FT_Long)CUR.GS.freeVector.y,
0x4000 );
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 = TT_Err_Invalid_Reference;
return;
}
}
else
MOVE_Zp2_Point( point, dx, dy, TRUE );
CUR.GS.loop--;
}
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;
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 = TT_Err_Invalid_Reference;
return;
}
/* XXX: UNDOCUMENTED! behaviour */
if ( CUR.GS.gep0 == 0 ) /* if in twilight zone */
{
CUR.zp1.org[point] = CUR.zp0.org[CUR.GS.rp0];
CUR.zp1.cur[point] = CUR.zp1.org[point];
}
distance = CUR_Func_project( CUR.zp1.cur + point,
CUR.zp0.cur + CUR.GS.rp0 );
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,
distance;
point = (FT_UShort)args[0];
if ( BOUNDS( point, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_Invalid_Reference;
return;
}
/* XXX: Is there some undocumented feature while in the */
/* twilight zone? ? */
if ( ( CUR.opcode & 1 ) != 0 )
{
cur_dist = CUR_Func_project( CUR.zp0.cur + point, NULL_Vector );
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,
org_dist;
cvtEntry = (FT_ULong)args[1];
point = (FT_UShort)args[0];
if ( BOUNDS( point, CUR.zp0.n_points ) ||
BOUNDS( cvtEntry, CUR.cvtSize ) )
{
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_Invalid_Reference;
return;
}
/* UNDOCUMENTED! */
/* */
/* The behaviour of an MIAP instruction is quite */
/* different when used in the twilight zone. */
/* */
/* First, no control value cutin 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 `illegal' 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. */
distance = CUR_Func_read_cvt( cvtEntry );
if ( CUR.GS.gep0 == 0 ) /* If in twilight zone */
{
CUR.zp0.org[point].x = TT_MULDIV( CUR.GS.freeVector.x,
distance, 0x4000 );
CUR.zp0.org[point].y = TT_MULDIV( CUR.GS.freeVector.y,
distance, 0x4000 );
CUR.zp0.cur[point] = CUR.zp0.org[point];
}
org_dist = CUR_Func_project( CUR.zp0.cur + point, NULL_Vector );
if ( ( CUR.opcode & 1 ) != 0 ) /* rounding and control cutin flag */
{
if ( ABS( distance - org_dist ) > CUR.GS.control_value_cutin )
distance = org_dist;
distance = CUR_Func_round( distance, CUR.tt_metrics.compensations[0] );
}
CUR_Func_move( &CUR.zp0, point, distance - org_dist );
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;
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 = TT_Err_Invalid_Reference;
return;
}
/* XXX: Is there some undocumented feature while in the */
/* twilight zone? */
org_dist = CUR_Func_dualproj( CUR.zp1.org + point,
CUR.zp0.org + CUR.GS.rp0 );
/* single width cutin test */
if ( ABS( org_dist ) < 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 )
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 < CUR.GS.minimum_distance )
distance = CUR.GS.minimum_distance;
}
else
{
if ( distance > -CUR.GS.minimum_distance )
distance = -CUR.GS.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 );
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;
point = (FT_UShort)args[0];
cvtEntry = (FT_ULong)( args[1] + 1 );
/* XXX: UNDOCUMENTED! cvt[-1] = 0 always */
if ( BOUNDS( point, CUR.zp1.n_points ) ||
BOUNDS( cvtEntry, CUR.cvtSize + 1 ) ||
BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_Invalid_Reference;
return;
}
if ( !cvtEntry )
cvt_dist = 0;
else
cvt_dist = CUR_Func_read_cvt( cvtEntry - 1 );
/* single width test */
if ( ABS( cvt_dist ) < CUR.GS.single_width_cutin )
{
if ( cvt_dist >= 0 )
cvt_dist = CUR.GS.single_width_value;
else
cvt_dist = -CUR.GS.single_width_value;
}
/* XXX: UNDOCUMENTED! -- twilight zone */
if ( CUR.GS.gep1 == 0 )
{
CUR.zp1.org[point].x = CUR.zp0.org[CUR.GS.rp0].x +
TT_MULDIV( cvt_dist,
CUR.GS.freeVector.x,
0x4000 );
CUR.zp1.org[point].y = CUR.zp0.org[CUR.GS.rp0].y +
TT_MULDIV( cvt_dist,
CUR.GS.freeVector.y,
0x4000 );
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;
}
/* control value cutin 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 )
if ( ABS( cvt_dist - org_dist ) >= CUR.GS.control_value_cutin )
cvt_dist = org_dist;
distance = CUR_Func_round(
cvt_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
}
else
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 < CUR.GS.minimum_distance )
distance = CUR.GS.minimum_distance;
}
else
{
if ( distance > -CUR.GS.minimum_distance )
distance = -CUR.GS.minimum_distance;
}
}
CUR_Func_move( &CUR.zp1, point, distance - cur_dist );
CUR.GS.rp1 = CUR.GS.rp0;
if ( ( CUR.opcode & 16 ) != 0 )
CUR.GS.rp0 = point;
/* XXX: UNDOCUMENTED! */
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;
if ( CUR.top < CUR.GS.loop ||
BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_Invalid_Reference;
return;
}
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 = TT_Err_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--;
}
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;
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 = TT_Err_Invalid_Reference;
return;
}
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 = TT_MULDIV( dax, -dby, 0x40 ) +
TT_MULDIV( day, dbx, 0x40 );
if ( ABS( discriminant ) >= 0x40 )
{
val = TT_MULDIV( dx, -dby, 0x40 ) + TT_MULDIV( dy, dbx, 0x40 );
R.x = TT_MULDIV( val, dax, discriminant );
R.y = TT_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( args[0], CUR.zp1.n_points ) ||
BOUNDS( args[1], CUR.zp0.n_points ) )
{
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_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... --> */
/* */
static void
Ins_IP( INS_ARG )
{
FT_F26Dot6 org_a, org_b, org_x,
cur_a, cur_b, cur_x,
distance;
FT_UShort point;
FT_UNUSED_ARG;
if ( CUR.top < CUR.GS.loop )
{
CUR.error = TT_Err_Invalid_Reference;
return;
}
/* 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 ) )
{
org_a = cur_a = 0;
org_b = cur_b = 0;
}
else
{
org_a = CUR_Func_dualproj( CUR.zp0.org + CUR.GS.rp1, NULL_Vector );
org_b = CUR_Func_dualproj( CUR.zp1.org + CUR.GS.rp2, NULL_Vector );
cur_a = CUR_Func_project( CUR.zp0.cur + CUR.GS.rp1, NULL_Vector );
cur_b = CUR_Func_project( CUR.zp1.cur + CUR.GS.rp2, NULL_Vector );
}
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 = TT_Err_Invalid_Reference;
return;
}
}
else
{
org_x = CUR_Func_dualproj( CUR.zp2.org + point, NULL_Vector );
cur_x = CUR_Func_project ( CUR.zp2.cur + point, NULL_Vector );
if ( ( org_a <= org_b && org_x <= org_a ) ||
( org_a > org_b && org_x >= org_a ) )
distance = ( cur_a - org_a ) + ( org_x - cur_x );
else if ( ( org_a <= org_b && org_x >= org_b ) ||
( org_a > org_b && org_x < org_b ) )
distance = ( cur_b - org_b ) + ( org_x - cur_x );
else
/* note: it seems that rounding this value isn't a good */
/* idea (cf. width of capital `S' in Times) */
distance = TT_MULDIV( cur_b - cur_a,
org_x - org_a,
org_b - org_a ) + ( cur_a - cur_x );
CUR_Func_move( &CUR.zp2, point, distance );
}
CUR.GS.loop--;
}
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 = TT_Err_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: */
struct LOC_Ins_IUP
{
FT_Vector* orgs; /* original and current coordinate */
FT_Vector* curs; /* arrays */
};
static void
Shift( FT_UInt p1,
FT_UInt p2,
FT_UInt p,
struct LOC_Ins_IUP* LINK )
{
FT_UInt i;
FT_F26Dot6 x;
x = LINK->curs[p].x - LINK->orgs[p].x;
for ( i = p1; i < p; i++ )
LINK->curs[i].x += x;
for ( i = p + 1; i <= p2; i++ )
LINK->curs[i].x += x;
}
static void
Interp( FT_UInt p1,
FT_UInt p2,
FT_UInt ref1,
FT_UInt ref2,
struct LOC_Ins_IUP* LINK )
{
FT_UInt i;
FT_F26Dot6 x, x1, x2, d1, d2;
if ( p1 > p2 )
return;
x1 = LINK->orgs[ref1].x;
d1 = LINK->curs[ref1].x - LINK->orgs[ref1].x;
x2 = LINK->orgs[ref2].x;
d2 = LINK->curs[ref2].x - LINK->orgs[ref2].x;
if ( x1 == x2 )
{
for ( i = p1; i <= p2; i++ )
{
x = LINK->orgs[i].x;
if ( x <= x1 )
x += d1;
else
x += d2;
LINK->curs[i].x = x;
}
return;
}
if ( x1 < x2 )
{
for ( i = p1; i <= p2; i++ )
{
x = LINK->orgs[i].x;
if ( x <= x1 )
x += d1;
else
{
if ( x >= x2 )
x += d2;
else
x = LINK->curs[ref1].x +
TT_MULDIV( x - x1,
LINK->curs[ref2].x - LINK->curs[ref1].x,
x2 - x1 );
}
LINK->curs[i].x = x;
}
return;
}
/* x2 < x1 */
for ( i = p1; i <= p2; i++ )
{
x = LINK->orgs[i].x;
if ( x <= x2 )
x += d2;
else
{
if ( x >= x1 )
x += d1;
else
x = LINK->curs[ref1].x +
TT_MULDIV( x - x1,
LINK->curs[ref2].x - LINK->curs[ref1].x,
x2 - x1 );
}
LINK->curs[i].x = x;
}
}
/*************************************************************************/
/* */
/* IUP[a]: Interpolate Untouched Points */
/* Opcode range: 0x30-0x31 */
/* Stack: --> */
/* */
static void
Ins_IUP( INS_ARG )
{
struct LOC_Ins_IUP 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;
if ( CUR.opcode & 1 )
{
mask = FT_Curve_Tag_Touch_X;
V.orgs = CUR.pts.org;
V.curs = CUR.pts.cur;
}
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 );
}
contour = 0;
point = 0;
do
{
end_point = CUR.pts.contours[contour];
first_point = point;
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 )
{
if ( point > 0 )
Interp( cur_touched + 1,
point - 1,
cur_touched,
point,
&V );
cur_touched = point;
}
point++;
}
if ( cur_touched == first_touched )
Shift( first_point, end_point, cur_touched, &V );
else
{
Interp( (FT_UShort)( cur_touched + 1 ),
end_point,
cur_touched,
first_touched,
&V );
if ( first_touched > 0 )
Interp( first_point,
first_touched - 1,
cur_touched,
first_touched,
&V );
}
}
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;
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 )
{
CUR.error = TT_Err_Too_Few_Arguments;
return;
}
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 );
CUR_Func_move( &CUR.zp0, A, B );
}
}
else
if ( CUR.pedantic_hinting )
CUR.error = TT_Err_Invalid_Reference;
}
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;
nump = (FT_ULong)args[0];
for ( k = 1; k <= nump; k++ )
{
if ( CUR.args < 2 )
{
CUR.error = TT_Err_Too_Few_Arguments;
return;
}
CUR.args -= 2;
A = (FT_ULong)CUR.stack[CUR.args + 1];
B = CUR.stack[CUR.args];
if ( BOUNDS( A, CUR.cvtSize ) )
{
if ( CUR.pedantic_hinting )
{
CUR.error = TT_Err_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 );
}
}
}
CUR.new_top = CUR.args;
}
/*************************************************************************/
/* */
/* MISC. INSTRUCTIONS */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* GETINFO[]: GET INFOrmation */
/* Opcode range: 0x88 */
/* Stack: uint32 --> uint32 */
/* */
/* XXX: According to Apple specs, bits 1 & 2 of the argument ought to be */
/* consulted before rotated/stretched info is returned. */
static void
Ins_GETINFO( INS_ARG )
{
FT_Long K;
K = 0;
/* We return then Windows 3.1 version number */
/* for the font scaler */
if ( ( args[0] & 1 ) != 0 )
K = 3;
/* Has the glyph been rotated ? */
if ( CUR.tt_metrics.rotated )
K |= 0x80;
/* Has the glyph been stretched ? */
if ( CUR.tt_metrics.stretched )
K |= 0x100;
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 = TT_Err_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;
INS_Goto_CodeRange( def->range, def->start );
CUR.step_ins = FALSE;
return;
}
}
CUR.error = TT_Err_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 whith TRUE, test IP < CodeSize to know wether 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 */
#ifdef TT_CONFIG_OPTION_STATIC_RASTER
cur = *exc;
#endif
/* 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];
if ( ( CUR.length = opcode_length[CUR.opcode] ) < 0 )
{
if ( CUR.IP + 1 > CUR.codeSize )
goto LErrorCodeOverflow_;
CUR.length = CUR.code[CUR.IP + 1] + 2;
}
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 )
{
CUR.error = TT_Err_Too_Few_Arguments;
goto LErrorLabel_;
}
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 = TT_Err_Stack_Overflow;
goto LErrorLabel_;
}
CUR.step_ins = TRUE;
CUR.error = TT_Err_Ok;
#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;
}
if ( ( opcode & 2 ) == 0 )
{
CUR.GS.freeVector.x = AA;
CUR.GS.freeVector.y = BB;
}
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 = TT_Err_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 != TT_Err_Ok )
{
switch ( CUR.error )
{
case TT_Err_Invalid_Opcode: /* looking for redefined instructions */
{
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 = TT_Err_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;
if ( INS_Goto_CodeRange( def->range, def->start ) == FAILURE )
goto LErrorLabel_;
goto LSuiteLabel_;
}
}
}
CUR.error = TT_Err_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 TT_Err_Execution_Too_Long;
LSuiteLabel_:
if ( CUR.IP >= CUR.codeSize )
{
if ( CUR.callTop > 0 )
{
CUR.error = TT_Err_Code_Overflow;
goto LErrorLabel_;
}
else
goto LNo_Error_;
}
} while ( !CUR.instruction_trap );
LNo_Error_:
#ifdef TT_CONFIG_OPTION_STATIC_RASTER
*exc = cur;
#endif
return TT_Err_Ok;
LErrorCodeOverflow_:
CUR.error = TT_Err_Code_Overflow;
LErrorLabel_:
#ifdef TT_CONFIG_OPTION_STATIC_RASTER
*exc = cur;
#endif
return CUR.error;
}
#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
/* END */