+++ /dev/null
-/***************************************************************************/
-/* */
-/* ttobjs.c */
-/* */
-/* Objects manager (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_INTERNAL_STREAM_H
-#include FT_TRUETYPE_IDS_H
-#include FT_TRUETYPE_TAGS_H
-#include FT_INTERNAL_SFNT_H
-#include FT_INTERNAL_POSTSCRIPT_NAMES_H
-
-#include "ttgload.h"
-#include "ttpload.h"
-
-#include "tterrors.h"
-
-#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
-#include "ttinterp.h"
-#endif
-
-
- /*************************************************************************/
- /* */
- /* 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_ttobjs
-
-
-#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
-
- /*************************************************************************/
- /* */
- /* GLYPH ZONE FUNCTIONS */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Done_GlyphZone */
- /* */
- /* <Description> */
- /* Deallocates a glyph zone. */
- /* */
- /* <Input> */
- /* zone :: A pointer to the target glyph zone. */
- /* */
- FT_LOCAL_DEF void
- TT_Done_GlyphZone( TT_GlyphZone* zone )
- {
- FT_Memory memory = zone->memory;
-
-
- FREE( zone->contours );
- FREE( zone->tags );
- FREE( zone->cur );
- FREE( zone->org );
-
- zone->max_points = zone->n_points = 0;
- zone->max_contours = zone->n_contours = 0;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_New_GlyphZone */
- /* */
- /* <Description> */
- /* Allocates a new glyph zone. */
- /* */
- /* <Input> */
- /* memory :: A handle to the current memory object. */
- /* */
- /* maxPoints :: The capacity of glyph zone in points. */
- /* */
- /* maxContours :: The capacity of glyph zone in contours. */
- /* */
- /* <Output> */
- /* zone :: A pointer to the target glyph zone record. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF FT_Error
- TT_New_GlyphZone( FT_Memory memory,
- FT_UShort maxPoints,
- FT_Short maxContours,
- TT_GlyphZone* zone )
- {
- FT_Error error;
-
-
- if ( maxPoints > 0 )
- maxPoints += 2;
-
- MEM_Set( zone, 0, sizeof ( *zone ) );
- zone->memory = memory;
-
- if ( ALLOC_ARRAY( zone->org, maxPoints * 2, FT_F26Dot6 ) ||
- ALLOC_ARRAY( zone->cur, maxPoints * 2, FT_F26Dot6 ) ||
- ALLOC_ARRAY( zone->tags, maxPoints, FT_Byte ) ||
- ALLOC_ARRAY( zone->contours, maxContours, FT_UShort ) )
- {
- TT_Done_GlyphZone( zone );
- }
-
- return error;
- }
-#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Init_Face */
- /* */
- /* <Description> */
- /* Initializes a given TrueType 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> */
- /* FreeType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF FT_Error
- TT_Init_Face( FT_Stream stream,
- TT_Face face,
- FT_Int face_index,
- FT_Int num_params,
- FT_Parameter* params )
- {
- FT_Error error;
- FT_Library library;
- SFNT_Interface* sfnt;
-
-
- library = face->root.driver->root.library;
- sfnt = (SFNT_Interface*)FT_Get_Module_Interface( library, "sfnt" );
- if ( !sfnt )
- goto Bad_Format;
-
- /* create input stream from resource */
- if ( FILE_Seek( 0 ) )
- goto Exit;
-
- /* check that we have a valid TrueType file */
- error = sfnt->init_face( stream, face, face_index, num_params, params );
- if ( error )
- goto Exit;
-
- /* We must also be able to accept Mac/GX fonts, as well as OT ones */
- if ( face->format_tag != 0x00010000L && /* MS fonts */
- face->format_tag != TTAG_true ) /* Mac fonts */
- {
- FT_TRACE2(( "[not a valid TTF font]\n" ));
- goto Bad_Format;
- }
-
- /* If we are performing a simple font format check, exit immediately */
- if ( face_index < 0 )
- return TT_Err_Ok;
-
- /* Load font directory */
- error = sfnt->load_face( stream, face, face_index, num_params, params );
- if ( error )
- goto Exit;
-
- if ( face->root.face_flags & FT_FACE_FLAG_SCALABLE )
- error = TT_Load_Locations( face, stream ) ||
- TT_Load_CVT ( face, stream ) ||
- TT_Load_Programs ( face, stream );
-
- /* initialize standard glyph loading routines */
- TT_Init_Glyph_Loading( face );
-
- Exit:
- return error;
-
- Bad_Format:
- error = TT_Err_Unknown_File_Format;
- goto Exit;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Done_Face */
- /* */
- /* <Description> */
- /* Finalizes a given face object. */
- /* */
- /* <Input> */
- /* face :: A pointer to the face object to destroy. */
- /* */
- FT_LOCAL_DEF void
- TT_Done_Face( TT_Face face )
- {
- FT_Memory memory = face->root.memory;
- FT_Stream stream = face->root.stream;
-
- SFNT_Interface* sfnt = (SFNT_Interface*)face->sfnt;
-
-
- /* for `extended TrueType formats' (i.e. compressed versions) */
- if ( face->extra.finalizer )
- face->extra.finalizer( face->extra.data );
-
- if ( sfnt )
- sfnt->done_face( face );
-
- /* freeing the locations table */
- FREE( face->glyph_locations );
- face->num_locations = 0;
-
- /* freeing the CVT */
- FREE( face->cvt );
- face->cvt_size = 0;
-
- /* freeing the programs */
- RELEASE_Frame( face->font_program );
- RELEASE_Frame( face->cvt_program );
- face->font_program_size = 0;
- face->cvt_program_size = 0;
- }
-
-
- /*************************************************************************/
- /* */
- /* SIZE FUNCTIONS */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Init_Size */
- /* */
- /* <Description> */
- /* Initializes a new TrueType size object. */
- /* */
- /* <InOut> */
- /* size :: A handle to the size object. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF FT_Error
- TT_Init_Size( TT_Size size )
- {
- FT_Error error = TT_Err_Ok;
-
-
-#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
-
- TT_Face face = (TT_Face)size->root.face;
- FT_Memory memory = face->root.memory;
- FT_Int i;
-
- TT_ExecContext exec;
- FT_UShort n_twilight;
- TT_MaxProfile* maxp = &face->max_profile;
-
-
- size->ttmetrics.valid = FALSE;
-
- size->max_function_defs = maxp->maxFunctionDefs;
- size->max_instruction_defs = maxp->maxInstructionDefs;
-
- size->num_function_defs = 0;
- size->num_instruction_defs = 0;
-
- size->max_func = 0;
- size->max_ins = 0;
-
- size->cvt_size = face->cvt_size;
- size->storage_size = maxp->maxStorage;
-
- /* Set default metrics */
- {
- FT_Size_Metrics* metrics = &size->root.metrics;
- TT_Size_Metrics* metrics2 = &size->ttmetrics;
-
-
- metrics->x_ppem = 0;
- metrics->y_ppem = 0;
-
- metrics2->rotated = FALSE;
- metrics2->stretched = FALSE;
-
- /* set default compensation (all 0) */
- for ( i = 0; i < 4; i++ )
- metrics2->compensations[i] = 0;
- }
-
- /* allocate function defs, instruction defs, cvt, and storage area */
- if ( ALLOC_ARRAY( size->function_defs,
- size->max_function_defs,
- TT_DefRecord ) ||
-
- ALLOC_ARRAY( size->instruction_defs,
- size->max_instruction_defs,
- TT_DefRecord ) ||
-
- ALLOC_ARRAY( size->cvt,
- size->cvt_size, FT_Long ) ||
-
- ALLOC_ARRAY( size->storage,
- size->storage_size, FT_Long ) )
-
- goto Fail_Memory;
-
- /* reserve twilight zone */
- n_twilight = maxp->maxTwilightPoints;
- error = TT_New_GlyphZone( memory, n_twilight, 0, &size->twilight );
- if ( error )
- goto Fail_Memory;
-
- size->twilight.n_points = n_twilight;
-
- /* set `face->interpreter' according to the debug hook present */
- {
- FT_Library library = face->root.driver->root.library;
-
-
- face->interpreter = (TT_Interpreter)
- library->debug_hooks[FT_DEBUG_HOOK_TRUETYPE];
- if ( !face->interpreter )
- face->interpreter = (TT_Interpreter)TT_RunIns;
- }
-
- /* Fine, now execute the font program! */
- exec = size->context;
- /* size objects used during debugging have their own context */
- if ( !size->debug )
- exec = TT_New_Context( face );
-
- if ( !exec )
- {
- error = TT_Err_Could_Not_Find_Context;
- goto Fail_Memory;
- }
-
- size->GS = tt_default_graphics_state;
- TT_Load_Context( exec, face, size );
-
- exec->callTop = 0;
- exec->top = 0;
-
- exec->period = 64;
- exec->phase = 0;
- exec->threshold = 0;
-
- {
- FT_Size_Metrics* metrics = &exec->metrics;
- TT_Size_Metrics* tt_metrics = &exec->tt_metrics;
-
-
- metrics->x_ppem = 0;
- metrics->y_ppem = 0;
- metrics->x_scale = 0;
- metrics->y_scale = 0;
-
- tt_metrics->ppem = 0;
- tt_metrics->scale = 0;
- tt_metrics->ratio = 0x10000L;
- }
-
- exec->instruction_trap = FALSE;
-
- exec->cvtSize = size->cvt_size;
- exec->cvt = size->cvt;
-
- exec->F_dot_P = 0x10000L;
-
- /* allow font program execution */
- TT_Set_CodeRange( exec,
- tt_coderange_font,
- face->font_program,
- face->font_program_size );
-
- /* disable CVT and glyph programs coderange */
- TT_Clear_CodeRange( exec, tt_coderange_cvt );
- TT_Clear_CodeRange( exec, tt_coderange_glyph );
-
- if ( face->font_program_size > 0 )
- {
- error = TT_Goto_CodeRange( exec, tt_coderange_font, 0 );
- if ( !error )
- error = face->interpreter( exec );
-
- if ( error )
- goto Fail_Exec;
- }
- else
- error = TT_Err_Ok;
-
- TT_Save_Context( exec, size );
-
- if ( !size->debug )
- TT_Done_Context( exec );
-
-#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
-
- size->ttmetrics.valid = FALSE;
- return error;
-
-#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
-
- Fail_Exec:
- if ( !size->debug )
- TT_Done_Context( exec );
-
- Fail_Memory:
-
- TT_Done_Size( size );
- return error;
-
-#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
-
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Done_Size */
- /* */
- /* <Description> */
- /* The TrueType size object finalizer. */
- /* */
- /* <Input> */
- /* size :: A handle to the target size object. */
- /* */
- FT_LOCAL_DEF void
- TT_Done_Size( TT_Size size )
- {
-
-#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
-
- FT_Memory memory = size->root.face->memory;
-
-
- if ( size->debug )
- {
- /* the debug context must be deleted by the debugger itself */
- size->context = NULL;
- size->debug = FALSE;
- }
-
- FREE( size->cvt );
- size->cvt_size = 0;
-
- /* free storage area */
- FREE( size->storage );
- size->storage_size = 0;
-
- /* twilight zone */
- TT_Done_GlyphZone( &size->twilight );
-
- FREE( size->function_defs );
- FREE( size->instruction_defs );
-
- size->num_function_defs = 0;
- size->max_function_defs = 0;
- size->num_instruction_defs = 0;
- size->max_instruction_defs = 0;
-
- size->max_func = 0;
- size->max_ins = 0;
-
-#endif
-
- size->ttmetrics.valid = FALSE;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Reset_Outline_Size */
- /* */
- /* <Description> */
- /* Resets a TrueType outline size when resolutions and character */
- /* dimensions have been changed. */
- /* */
- /* <Input> */
- /* size :: A handle to the target size object. */
- /* */
- static FT_Error
- Reset_Outline_Size( TT_Size size )
- {
- TT_Face face;
- FT_Error error = TT_Err_Ok;
-
- FT_Size_Metrics* metrics;
-
-
- if ( size->ttmetrics.valid )
- return TT_Err_Ok;
-
- face = (TT_Face)size->root.face;
-
- metrics = &size->root.metrics;
-
- if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
- return TT_Err_Invalid_PPem;
-
- /* compute new transformation */
- if ( metrics->x_ppem >= metrics->y_ppem )
- {
- size->ttmetrics.scale = metrics->x_scale;
- size->ttmetrics.ppem = metrics->x_ppem;
- size->ttmetrics.x_ratio = 0x10000L;
- size->ttmetrics.y_ratio = FT_MulDiv( metrics->y_ppem,
- 0x10000L,
- metrics->x_ppem );
- }
- else
- {
- size->ttmetrics.scale = metrics->y_scale;
- size->ttmetrics.ppem = metrics->y_ppem;
- size->ttmetrics.x_ratio = FT_MulDiv( metrics->x_ppem,
- 0x10000L,
- metrics->y_ppem );
- size->ttmetrics.y_ratio = 0x10000L;
- }
-
- /* 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;
-
-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
- /* set to `invalid' by default */
- size->strike_index = 0xFFFF;
-#endif
-
-#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
-
- {
- TT_ExecContext exec;
- FT_UInt i, j;
-
-
- /* Scale the cvt values to the new ppem. */
- /* We use by default the y ppem to scale the CVT. */
- for ( i = 0; i < size->cvt_size; i++ )
- size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
-
- /* All twilight points are originally zero */
- for ( j = 0; j < (FT_UInt)size->twilight.n_points; j++ )
- {
- size->twilight.org[j].x = 0;
- size->twilight.org[j].y = 0;
- size->twilight.cur[j].x = 0;
- size->twilight.cur[j].y = 0;
- }
-
- /* clear storage area */
- for ( i = 0; i < (FT_UInt)size->storage_size; i++ )
- size->storage[i] = 0;
-
- size->GS = tt_default_graphics_state;
-
- /* get execution context and run prep program */
- if ( size->debug )
- exec = size->context;
- else
- exec = TT_New_Context( face );
- /* debugging instances have their own context */
-
- if ( !exec )
- return TT_Err_Could_Not_Find_Context;
-
- TT_Load_Context( exec, face, size );
-
- TT_Set_CodeRange( exec,
- tt_coderange_cvt,
- face->cvt_program,
- face->cvt_program_size );
-
- TT_Clear_CodeRange( exec, tt_coderange_glyph );
-
- exec->instruction_trap = FALSE;
-
- exec->top = 0;
- exec->callTop = 0;
-
- if ( face->cvt_program_size > 0 )
- {
- error = TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 );
- if ( error )
- goto End;
-
- if ( !size->debug )
- error = face->interpreter( exec );
- }
- else
- error = TT_Err_Ok;
-
- size->GS = exec->GS;
- /* save default graphics state */
-
- End:
- TT_Save_Context( exec, size );
-
- if ( !size->debug )
- TT_Done_Context( exec );
- /* debugging instances keep their context */
- }
-
-#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
-
- if ( !error )
- size->ttmetrics.valid = TRUE;
-
- return error;
- }
-
-
-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Reset_SBit_Size */
- /* */
- /* <Description> */
- /* Resets a TrueType sbit size when resolutions and character */
- /* dimensions have been changed. */
- /* */
- /* <Input> */
- /* size :: A handle to the target size object. */
- /* */
- static FT_Error
- Reset_SBit_Size( TT_Size size )
- {
- TT_Face face;
- FT_Error error = TT_Err_Ok;
-
- FT_ULong strike_index;
- FT_Size_Metrics* metrics;
- FT_Size_Metrics* sbit_metrics;
- SFNT_Interface* sfnt;
-
-
- metrics = &size->root.metrics;
-
- if ( size->strike_index != 0xFFFF )
- return TT_Err_Ok;
-
- face = (TT_Face)size->root.face;
- sfnt = (SFNT_Interface*)face->sfnt;
-
- sbit_metrics = &size->strike_metrics;
-
- error = sfnt->set_sbit_strike(face,
- metrics->x_ppem, metrics->y_ppem,
- &strike_index);
-
- if ( !error )
- {
- TT_SBit_Strike* strike = face->sbit_strikes + strike_index;
-
-
- sbit_metrics->x_ppem = metrics->x_ppem;
- sbit_metrics->y_ppem = metrics->y_ppem;
-#if 0
- /*
- * sbit_metrics->?_scale
- * are not used now.
- */
- sbit_metrics->x_scale = 1 << 16;
- sbit_metrics->y_scale = 1 << 16;
-#endif
-
- sbit_metrics->ascender = strike->hori.ascender << 6;
- sbit_metrics->descender = strike->hori.descender << 6;
-
- /* XXX: Is this correct? */
- sbit_metrics->height = sbit_metrics->ascender -
- sbit_metrics->descender;
-
- /* XXX: Is this correct? */
- sbit_metrics->max_advance = ( strike->hori.min_origin_SB +
- strike->hori.max_width +
- strike->hori.min_advance_SB ) << 6;
-
- size->strike_index = strike_index;
- }
- else
- {
- size->strike_index = 0xFFFF;
-
- sbit_metrics->x_ppem = 0;
- sbit_metrics->y_ppem = 0;
- sbit_metrics->ascender = 0;
- sbit_metrics->descender = 0;
- sbit_metrics->height = 0;
- sbit_metrics->max_advance = 0;
- }
-
- return error;
- }
-
-#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Reset_Size */
- /* */
- /* <Description> */
- /* Resets a TrueType size when resolutions and character dimensions */
- /* have been changed. */
- /* */
- /* <Input> */
- /* size :: A handle to the target size object. */
- /* */
- FT_LOCAL_DEF FT_Error
- TT_Reset_Size( TT_Size size )
- {
- FT_Face face;
- FT_Error error = TT_Err_Ok;
-
-
- face = size->root.face;
-
- if ( face->face_flags & FT_FACE_FLAG_SCALABLE )
- {
- if ( !size->ttmetrics.valid )
- error = Reset_Outline_Size( size );
-
- if ( error )
- return error;
- }
-
-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
-
- if ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )
- {
- if ( size->strike_index == 0xFFFF )
- error = Reset_SBit_Size( size );
-
- if ( !error && !( face->face_flags & FT_FACE_FLAG_SCALABLE ) )
- size->root.metrics = size->strike_metrics;
- }
-
-#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
-
- if ( face->face_flags & FT_FACE_FLAG_SCALABLE )
- return TT_Err_Ok;
- else
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Init_Driver */
- /* */
- /* <Description> */
- /* Initializes a given TrueType driver object. */
- /* */
- /* <Input> */
- /* driver :: A handle to the target driver object. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF FT_Error
- TT_Init_Driver( TT_Driver driver )
- {
- FT_Error error;
-
-
- /* set `extra' in glyph loader */
- error = FT_GlyphLoader_Create_Extra( FT_DRIVER( driver )->glyph_loader );
-
- /* init extension registry if needed */
-
-#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
- if ( !error )
- return TT_Init_Extensions( driver );
-#endif
-
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Done_Driver */
- /* */
- /* <Description> */
- /* Finalizes a given TrueType driver. */
- /* */
- /* <Input> */
- /* driver :: A handle to the target TrueType driver. */
- /* */
- FT_LOCAL_DEF void
- TT_Done_Driver( TT_Driver driver )
- {
- /* destroy extensions registry if needed */
-
-#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
-
- TT_Done_Extensions( driver );
-
-#endif
-
-#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
-
- /* destroy the execution context */
- if ( driver->context )
- {
- TT_Destroy_Context( driver->context, driver->root.root.memory );
- driver->context = NULL;
- }
-#else
- FT_UNUSED( driver );
-#endif
-
- }
-
-
-/* END */
projects / rrdtool.git / blobdiff