ref: e3c11d7f004b906bebf610cc8bdb5320494fd157
dir: /src/cff/t2objs.c/
/***************************************************************************/
/* */
/* t2objs.c */
/* */
/* OpenType objects manager (body). */
/* */
/* Copyright 1996-2000 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 <freetype/internal/ftdebug.h>
#include <freetype/internal/ftcalc.h>
#include <freetype/internal/ftstream.h>
#include <freetype/ttnameid.h>
#include <freetype/tttags.h>
#include <freetype/internal/sfnt.h>
#include <freetype/internal/psnames.h>
#include <t2objs.h>
#include <t2load.h>
#include <freetype/internal/t2errors.h>
/*************************************************************************/
/* */
/* 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_t2objs
/*************************************************************************/
/* */
/* FACE FUNCTIONS */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* T2_Init_Face */
/* */
/* <Description> */
/* Initializes a given OpenType face object. */
/* */
/* <Input> */
/* stream :: The source font stream. */
/* */
/* face_index :: The index of the font face in the resource. */
/* */
/* num_params :: Number of additional generic parameters. Ignored. */
/* */
/* params :: Additional generic parameters. Ignored. */
/* */
/* <InOut> */
/* face :: The newly built face object. */
/* */
/* <Return> */
/* TrueType error code. 0 means success. */
/* */
LOCAL_DEF
FT_Error T2_Init_Face( FT_Stream stream,
T2_Face face,
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
TT_Error error;
FT_Driver sfnt_driver;
SFNT_Interface* sfnt;
sfnt_driver = FT_Get_Driver( face->root.driver->library, "sfnt" );
if ( !sfnt_driver )
goto Bad_Format;
sfnt = (SFNT_Interface*)(sfnt_driver->interface.format_interface);
if ( !sfnt )
goto Bad_Format;
/* create input stream from resource */
if ( FILE_Seek( 0 ) )
goto Exit;
/* check that we have a valid OpenType file */
error = sfnt->init_face( stream, face, face_index, num_params, params );
if ( error )
goto Exit;
if ( face->format_tag != 0x4f54544fL ) /* OpenType/CFF font */
{
FT_TRACE2(( "[not a valid OpenType/CFF font]\n" ));
goto Bad_Format;
}
/* If we are performing a simple font format check, exit immediately */
if ( face_index < 0 )
return T2_Err_Ok;
/* Load font directory */
error = sfnt->load_face( stream, face, face_index, num_params, params );
if ( error )
goto Exit;
/* now, load the CFF part of the file.. */
error = face->goto_table( face, TTAG_CFF, stream, 0 );
if ( error )
goto Exit;
{
CFF_Font* cff;
FT_Memory memory = face->root.memory;
FT_Face root;
if ( ALLOC( cff, sizeof ( *cff ) ) )
goto Exit;
face->other = cff;
error = T2_Load_CFF_Font( stream, face_index, cff );
if ( error )
goto Exit;
/* Complement the root flags with some interesting information. */
/* note that for OpenType/CFF, there is no need to do this, but */
/* this will be necessary for pure CFF fonts through. */
root = &face->root;
}
Exit:
return error;
Bad_Format:
error = FT_Err_Unknown_File_Format;
goto Exit;
}
/*************************************************************************/
/* */
/* <Function> */
/* T2_Done_Face */
/* */
/* <Description> */
/* Finalizes a given face object. */
/* */
/* <Input> */
/* face :: A pointer to the face object to destroy. */
/* */
LOCAL_DEF
void T2_Done_Face( T2_Face face )
{
FT_Memory memory = face->root.memory;
#if 0
FT_Stream stream = face->root.stream;
#endif
SFNT_Interface* sfnt = face->sfnt;
if ( sfnt )
sfnt->done_face( face );
{
CFF_Font* cff = (CFF_Font*)face->other;
if ( cff )
{
T2_Done_CFF_Font( cff );
FREE( face->other );
}
}
}
/*************************************************************************/
/* */
/* SIZE FUNCTIONS */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* T2_Init_Size */
/* */
/* <Description> */
/* Initializes a new OpenType size object. */
/* */
/* <InOut> */
/* size :: A handle to the size object. */
/* */
/* <Return> */
/* TrueType error code. 0 means success. */
/* */
LOCAL_DEF
FT_Error T2_Init_Size( T2_Size size )
{
UNUSED( size );
return 0;
}
/*************************************************************************/
/* */
/* <Function> */
/* T2_Done_Size */
/* */
/* <Description> */
/* The OpenType size object finalizer. */
/* */
/* <Input> */
/* size :: A handle to the target size object. */
/* */
LOCAL_FUNC
void T2_Done_Size( T2_Size size )
{
UNUSED( size );
}
/*************************************************************************/
/* */
/* <Function> */
/* T2_Reset_Size */
/* */
/* <Description> */
/* Resets a OpenType size when resolutions and character dimensions */
/* have been changed. */
/* */
/* <Input> */
/* size :: A handle to the target size object. */
/* */
/* <Output> */
/* TrueType error code. 0 means success. */
/* */
LOCAL_DEF
TT_Error T2_Reset_Size( T2_Size size )
{
T2_Face face = (T2_Face)size->face;
FT_Size_Metrics* metrics = &size->metrics;
if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
return T2_Err_Invalid_PPem;
/* Compute root ascender, descender, test height, and max_advance */
metrics->ascender = ( FT_MulFix( face->root.ascender,
metrics->y_scale ) + 32 ) & -64;
metrics->descender = ( FT_MulFix( face->root.descender,
metrics->y_scale ) + 32 ) & -64;
metrics->height = ( FT_MulFix( face->root.height,
metrics->y_scale ) + 32 ) & -64;
metrics->max_advance = ( FT_MulFix( face->root.max_advance_width,
metrics->x_scale ) + 32 ) & -64;
return T2_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* T2_Init_GlyphSlot */
/* */
/* <Description> */
/* The OpenType glyph slot initializer. */
/* */
/* <Input> */
/* slot :: The glyph record to build. */
/* */
/* <Output> */
/* TrueType error code. 0 means success. */
/* */
LOCAL_FUNC
TT_Error T2_Init_GlyphSlot( T2_GlyphSlot slot )
{
FT_Library library = slot->root.face->driver->library;
slot->max_points = 0;
slot->max_contours = 0;
slot->root.bitmap.buffer = 0;
return FT_Outline_New( library, 0, 0, &slot->root.outline );
}
/*************************************************************************/
/* */
/* <Function> */
/* T2_Done_GlyphSlot */
/* */
/* <Description> */
/* The OpenType glyph slot finalizer. */
/* */
/* <Input> */
/* slot :: A handle to the glyph slot object. */
/* */
LOCAL_FUNC
void T2_Done_GlyphSlot( T2_GlyphSlot slot )
{
FT_Library library = slot->root.face->driver->library;
FT_Memory memory = library->memory;
if ( slot->root.flags & ft_glyph_own_bitmap )
FREE( slot->root.bitmap.buffer );
FT_Outline_Done( library, &slot->root.outline );
return;
}
/*************************************************************************/
/* */
/* <Function> */
/* T2_Init_Driver */
/* */
/* <Description> */
/* Initializes a given OpenType driver object. */
/* */
/* <Input> */
/* driver :: A handle to the target driver object. */
/* */
/* <Return> */
/* TrueType error code. 0 means success. */
/* */
LOCAL_FUNC
TT_Error T2_Init_Driver( T2_Driver driver )
{
FT_Memory memory = driver->root.memory;
FT_Error error;
error = FT_New_GlyphZone( memory, 0, 0, &driver->zone );
if ( error )
return error;
/* init extension registry if needed */
#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
return TT_Init_Extensions( driver );
#else
return T2_Err_Ok;
#endif
}
/*************************************************************************/
/* */
/* <Function> */
/* T2_Done_Driver */
/* */
/* <Description> */
/* Finalizes a given OpenType driver. */
/* */
/* <Input> */
/* driver :: A handle to the target OpenType driver. */
/* */
LOCAL_FUNC
void T2_Done_Driver( T2_Driver driver )
{
/* destroy extensions registry if needed */
#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
TT_Done_Extensions( driver );
#endif
/* remove the loading glyph zone */
FT_Done_GlyphZone( &driver->zone );
}
/* END */