| /***************************************************************************/ |
| /* */ |
| /* ftobjs.c */ |
| /* */ |
| /* The FreeType private base classes (body). */ |
| /* */ |
| /* Copyright 1996-2015 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_LIST_H |
| #include FT_OUTLINE_H |
| #include FT_INTERNAL_VALIDATE_H |
| #include FT_INTERNAL_OBJECTS_H |
| #include FT_INTERNAL_DEBUG_H |
| #include FT_INTERNAL_RFORK_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_INTERNAL_SFNT_H /* for SFNT_Load_Table_Func */ |
| #include FT_TRUETYPE_TABLES_H |
| #include FT_TRUETYPE_TAGS_H |
| #include FT_TRUETYPE_IDS_H |
| |
| #include FT_SERVICE_PROPERTIES_H |
| #include FT_SERVICE_SFNT_H |
| #include FT_SERVICE_POSTSCRIPT_NAME_H |
| #include FT_SERVICE_GLYPH_DICT_H |
| #include FT_SERVICE_TT_CMAP_H |
| #include FT_SERVICE_KERNING_H |
| #include FT_SERVICE_TRUETYPE_ENGINE_H |
| |
| #ifdef FT_CONFIG_OPTION_MAC_FONTS |
| #include "ftbase.h" |
| #endif |
| |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| |
| #include FT_BITMAP_H |
| |
| #if defined( _MSC_VER ) /* Visual C++ (and Intel C++) */ |
| /* We disable the warning `conversion from XXX to YYY, */ |
| /* possible loss of data' in order to compile cleanly with */ |
| /* the maximum level of warnings: `md5.c' is non-FreeType */ |
| /* code, and it gets used during development builds only. */ |
| #pragma warning( push ) |
| #pragma warning( disable : 4244 ) |
| #endif /* _MSC_VER */ |
| |
| /* it's easiest to include `md5.c' directly */ |
| #include "md5.c" |
| |
| #if defined( _MSC_VER ) |
| #pragma warning( pop ) |
| #endif |
| |
| #endif /* FT_DEBUG_LEVEL_TRACE */ |
| |
| |
| #define GRID_FIT_METRICS |
| |
| |
| FT_BASE_DEF( FT_Pointer ) |
| ft_service_list_lookup( FT_ServiceDesc service_descriptors, |
| const char* service_id ) |
| { |
| FT_Pointer result = NULL; |
| FT_ServiceDesc desc = service_descriptors; |
| |
| |
| if ( desc && service_id ) |
| { |
| for ( ; desc->serv_id != NULL; desc++ ) |
| { |
| if ( ft_strcmp( desc->serv_id, service_id ) == 0 ) |
| { |
| result = (FT_Pointer)desc->serv_data; |
| break; |
| } |
| } |
| } |
| |
| return result; |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| ft_validator_init( FT_Validator valid, |
| const FT_Byte* base, |
| const FT_Byte* limit, |
| FT_ValidationLevel level ) |
| { |
| valid->base = base; |
| valid->limit = limit; |
| valid->level = level; |
| valid->error = FT_Err_Ok; |
| } |
| |
| |
| FT_BASE_DEF( FT_Int ) |
| ft_validator_run( FT_Validator valid ) |
| { |
| /* This function doesn't work! None should call it. */ |
| FT_UNUSED( valid ); |
| |
| return -1; |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| ft_validator_error( FT_Validator valid, |
| FT_Error error ) |
| { |
| /* since the cast below also disables the compiler's */ |
| /* type check, we introduce a dummy variable, which */ |
| /* will be optimized away */ |
| volatile ft_jmp_buf* jump_buffer = &valid->jump_buffer; |
| |
| |
| valid->error = error; |
| |
| /* throw away volatileness; use `jump_buffer' or the */ |
| /* compiler may warn about an unused local variable */ |
| ft_longjmp( *(ft_jmp_buf*) jump_buffer, 1 ); |
| } |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /**** ****/ |
| /**** ****/ |
| /**** S T R E A M ****/ |
| /**** ****/ |
| /**** ****/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| |
| /* create a new input stream from an FT_Open_Args structure */ |
| /* */ |
| FT_BASE_DEF( FT_Error ) |
| FT_Stream_New( FT_Library library, |
| const FT_Open_Args* args, |
| FT_Stream *astream ) |
| { |
| FT_Error error; |
| FT_Memory memory; |
| FT_Stream stream = NULL; |
| |
| |
| *astream = NULL; |
| |
| if ( !library ) |
| return FT_THROW( Invalid_Library_Handle ); |
| |
| if ( !args ) |
| return FT_THROW( Invalid_Argument ); |
| |
| memory = library->memory; |
| |
| if ( FT_NEW( stream ) ) |
| goto Exit; |
| |
| stream->memory = memory; |
| |
| if ( args->flags & FT_OPEN_MEMORY ) |
| { |
| /* create a memory-based stream */ |
| FT_Stream_OpenMemory( stream, |
| (const FT_Byte*)args->memory_base, |
| (FT_ULong)args->memory_size ); |
| } |
| |
| #ifndef FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT |
| |
| else if ( args->flags & FT_OPEN_PATHNAME ) |
| { |
| /* create a normal system stream */ |
| error = FT_Stream_Open( stream, args->pathname ); |
| stream->pathname.pointer = args->pathname; |
| } |
| else if ( ( args->flags & FT_OPEN_STREAM ) && args->stream ) |
| { |
| /* use an existing, user-provided stream */ |
| |
| /* in this case, we do not need to allocate a new stream object */ |
| /* since the caller is responsible for closing it himself */ |
| FT_FREE( stream ); |
| stream = args->stream; |
| } |
| |
| #endif |
| |
| else |
| error = FT_THROW( Invalid_Argument ); |
| |
| if ( error ) |
| FT_FREE( stream ); |
| else |
| stream->memory = memory; /* just to be certain */ |
| |
| *astream = stream; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| FT_Stream_Free( FT_Stream stream, |
| FT_Int external ) |
| { |
| if ( stream ) |
| { |
| FT_Memory memory = stream->memory; |
| |
| |
| FT_Stream_Close( stream ); |
| |
| if ( !external ) |
| FT_FREE( stream ); |
| } |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* 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_objs |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /**** ****/ |
| /**** ****/ |
| /**** FACE, SIZE & GLYPH SLOT OBJECTS ****/ |
| /**** ****/ |
| /**** ****/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| |
| static FT_Error |
| ft_glyphslot_init( FT_GlyphSlot slot ) |
| { |
| FT_Driver driver = slot->face->driver; |
| FT_Driver_Class clazz = driver->clazz; |
| FT_Memory memory = driver->root.memory; |
| FT_Error error = FT_Err_Ok; |
| FT_Slot_Internal internal = NULL; |
| |
| |
| slot->library = driver->root.library; |
| |
| if ( FT_NEW( internal ) ) |
| goto Exit; |
| |
| slot->internal = internal; |
| |
| if ( FT_DRIVER_USES_OUTLINES( driver ) ) |
| error = FT_GlyphLoader_New( memory, &internal->loader ); |
| |
| if ( !error && clazz->init_slot ) |
| error = clazz->init_slot( slot ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| ft_glyphslot_free_bitmap( FT_GlyphSlot slot ) |
| { |
| if ( slot->internal && ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) ) |
| { |
| FT_Memory memory = FT_FACE_MEMORY( slot->face ); |
| |
| |
| FT_FREE( slot->bitmap.buffer ); |
| slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; |
| } |
| else |
| { |
| /* assume that the bitmap buffer was stolen or not */ |
| /* allocated from the heap */ |
| slot->bitmap.buffer = NULL; |
| } |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| ft_glyphslot_set_bitmap( FT_GlyphSlot slot, |
| FT_Byte* buffer ) |
| { |
| ft_glyphslot_free_bitmap( slot ); |
| |
| slot->bitmap.buffer = buffer; |
| |
| FT_ASSERT( (slot->internal->flags & FT_GLYPH_OWN_BITMAP) == 0 ); |
| } |
| |
| |
| FT_BASE_DEF( FT_Error ) |
| ft_glyphslot_alloc_bitmap( FT_GlyphSlot slot, |
| FT_ULong size ) |
| { |
| FT_Memory memory = FT_FACE_MEMORY( slot->face ); |
| FT_Error error; |
| |
| |
| if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) |
| FT_FREE( slot->bitmap.buffer ); |
| else |
| slot->internal->flags |= FT_GLYPH_OWN_BITMAP; |
| |
| (void)FT_ALLOC( slot->bitmap.buffer, size ); |
| return error; |
| } |
| |
| |
| static void |
| ft_glyphslot_clear( FT_GlyphSlot slot ) |
| { |
| /* free bitmap if needed */ |
| ft_glyphslot_free_bitmap( slot ); |
| |
| /* clear all public fields in the glyph slot */ |
| FT_ZERO( &slot->metrics ); |
| FT_ZERO( &slot->outline ); |
| |
| slot->bitmap.width = 0; |
| slot->bitmap.rows = 0; |
| slot->bitmap.pitch = 0; |
| slot->bitmap.pixel_mode = 0; |
| /* `slot->bitmap.buffer' has been handled by ft_glyphslot_free_bitmap */ |
| |
| slot->bitmap_left = 0; |
| slot->bitmap_top = 0; |
| slot->num_subglyphs = 0; |
| slot->subglyphs = NULL; |
| slot->control_data = NULL; |
| slot->control_len = 0; |
| slot->other = NULL; |
| slot->format = FT_GLYPH_FORMAT_NONE; |
| |
| slot->linearHoriAdvance = 0; |
| slot->linearVertAdvance = 0; |
| slot->lsb_delta = 0; |
| slot->rsb_delta = 0; |
| } |
| |
| |
| static void |
| ft_glyphslot_done( FT_GlyphSlot slot ) |
| { |
| FT_Driver driver = slot->face->driver; |
| FT_Driver_Class clazz = driver->clazz; |
| FT_Memory memory = driver->root.memory; |
| |
| |
| if ( clazz->done_slot ) |
| clazz->done_slot( slot ); |
| |
| /* free bitmap buffer if needed */ |
| ft_glyphslot_free_bitmap( slot ); |
| |
| /* slot->internal might be NULL in out-of-memory situations */ |
| if ( slot->internal ) |
| { |
| /* free glyph loader */ |
| if ( FT_DRIVER_USES_OUTLINES( driver ) ) |
| { |
| FT_GlyphLoader_Done( slot->internal->loader ); |
| slot->internal->loader = NULL; |
| } |
| |
| FT_FREE( slot->internal ); |
| } |
| } |
| |
| |
| /* documentation is in ftobjs.h */ |
| |
| FT_BASE_DEF( FT_Error ) |
| FT_New_GlyphSlot( FT_Face face, |
| FT_GlyphSlot *aslot ) |
| { |
| FT_Error error; |
| FT_Driver driver; |
| FT_Driver_Class clazz; |
| FT_Memory memory; |
| FT_GlyphSlot slot = NULL; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( !face->driver ) |
| return FT_THROW( Invalid_Argument ); |
| |
| driver = face->driver; |
| clazz = driver->clazz; |
| memory = driver->root.memory; |
| |
| FT_TRACE4(( "FT_New_GlyphSlot: Creating new slot object\n" )); |
| if ( !FT_ALLOC( slot, clazz->slot_object_size ) ) |
| { |
| slot->face = face; |
| |
| error = ft_glyphslot_init( slot ); |
| if ( error ) |
| { |
| ft_glyphslot_done( slot ); |
| FT_FREE( slot ); |
| goto Exit; |
| } |
| |
| slot->next = face->glyph; |
| face->glyph = slot; |
| |
| if ( aslot ) |
| *aslot = slot; |
| } |
| else if ( aslot ) |
| *aslot = NULL; |
| |
| |
| Exit: |
| FT_TRACE4(( "FT_New_GlyphSlot: Return %d\n", error )); |
| return error; |
| } |
| |
| |
| /* documentation is in ftobjs.h */ |
| |
| FT_BASE_DEF( void ) |
| FT_Done_GlyphSlot( FT_GlyphSlot slot ) |
| { |
| if ( slot ) |
| { |
| FT_Driver driver = slot->face->driver; |
| FT_Memory memory = driver->root.memory; |
| FT_GlyphSlot prev; |
| FT_GlyphSlot cur; |
| |
| |
| /* Remove slot from its parent face's list */ |
| prev = NULL; |
| cur = slot->face->glyph; |
| |
| while ( cur ) |
| { |
| if ( cur == slot ) |
| { |
| if ( !prev ) |
| slot->face->glyph = cur->next; |
| else |
| prev->next = cur->next; |
| |
| /* finalize client-specific data */ |
| if ( slot->generic.finalizer ) |
| slot->generic.finalizer( slot ); |
| |
| ft_glyphslot_done( slot ); |
| FT_FREE( slot ); |
| break; |
| } |
| prev = cur; |
| cur = cur->next; |
| } |
| } |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( void ) |
| FT_Set_Transform( FT_Face face, |
| FT_Matrix* matrix, |
| FT_Vector* delta ) |
| { |
| FT_Face_Internal internal; |
| |
| |
| if ( !face ) |
| return; |
| |
| internal = face->internal; |
| |
| internal->transform_flags = 0; |
| |
| if ( !matrix ) |
| { |
| internal->transform_matrix.xx = 0x10000L; |
| internal->transform_matrix.xy = 0; |
| internal->transform_matrix.yx = 0; |
| internal->transform_matrix.yy = 0x10000L; |
| |
| matrix = &internal->transform_matrix; |
| } |
| else |
| internal->transform_matrix = *matrix; |
| |
| /* set transform_flags bit flag 0 if `matrix' isn't the identity */ |
| if ( ( matrix->xy | matrix->yx ) || |
| matrix->xx != 0x10000L || |
| matrix->yy != 0x10000L ) |
| internal->transform_flags |= 1; |
| |
| if ( !delta ) |
| { |
| internal->transform_delta.x = 0; |
| internal->transform_delta.y = 0; |
| |
| delta = &internal->transform_delta; |
| } |
| else |
| internal->transform_delta = *delta; |
| |
| /* set transform_flags bit flag 1 if `delta' isn't the null vector */ |
| if ( delta->x | delta->y ) |
| internal->transform_flags |= 2; |
| } |
| |
| |
| static FT_Renderer |
| ft_lookup_glyph_renderer( FT_GlyphSlot slot ); |
| |
| |
| #ifdef GRID_FIT_METRICS |
| static void |
| ft_glyphslot_grid_fit_metrics( FT_GlyphSlot slot, |
| FT_Bool vertical ) |
| { |
| FT_Glyph_Metrics* metrics = &slot->metrics; |
| FT_Pos right, bottom; |
| |
| |
| if ( vertical ) |
| { |
| metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX ); |
| metrics->horiBearingY = FT_PIX_CEIL ( metrics->horiBearingY ); |
| |
| right = FT_PIX_CEIL( metrics->vertBearingX + metrics->width ); |
| bottom = FT_PIX_CEIL( metrics->vertBearingY + metrics->height ); |
| |
| metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); |
| metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); |
| |
| metrics->width = right - metrics->vertBearingX; |
| metrics->height = bottom - metrics->vertBearingY; |
| } |
| else |
| { |
| metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); |
| metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); |
| |
| right = FT_PIX_CEIL ( metrics->horiBearingX + metrics->width ); |
| bottom = FT_PIX_FLOOR( metrics->horiBearingY - metrics->height ); |
| |
| metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX ); |
| metrics->horiBearingY = FT_PIX_CEIL ( metrics->horiBearingY ); |
| |
| metrics->width = right - metrics->horiBearingX; |
| metrics->height = metrics->horiBearingY - bottom; |
| } |
| |
| metrics->horiAdvance = FT_PIX_ROUND( metrics->horiAdvance ); |
| metrics->vertAdvance = FT_PIX_ROUND( metrics->vertAdvance ); |
| } |
| #endif /* GRID_FIT_METRICS */ |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Load_Glyph( FT_Face face, |
| FT_UInt glyph_index, |
| FT_Int32 load_flags ) |
| { |
| FT_Error error; |
| FT_Driver driver; |
| FT_GlyphSlot slot; |
| FT_Library library; |
| FT_Bool autohint = FALSE; |
| FT_Module hinter; |
| TT_Face ttface = (TT_Face)face; |
| |
| |
| if ( !face || !face->size || !face->glyph ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| /* The validity test for `glyph_index' is performed by the */ |
| /* font drivers. */ |
| |
| slot = face->glyph; |
| ft_glyphslot_clear( slot ); |
| |
| driver = face->driver; |
| library = driver->root.library; |
| hinter = library->auto_hinter; |
| |
| /* resolve load flags dependencies */ |
| |
| if ( load_flags & FT_LOAD_NO_RECURSE ) |
| load_flags |= FT_LOAD_NO_SCALE | |
| FT_LOAD_IGNORE_TRANSFORM; |
| |
| if ( load_flags & FT_LOAD_NO_SCALE ) |
| { |
| load_flags |= FT_LOAD_NO_HINTING | |
| FT_LOAD_NO_BITMAP; |
| |
| load_flags &= ~FT_LOAD_RENDER; |
| } |
| |
| /* |
| * Determine whether we need to auto-hint or not. |
| * The general rules are: |
| * |
| * - Do only auto-hinting if we have a hinter module, a scalable font |
| * format dealing with outlines, and no transforms except simple |
| * slants and/or rotations by integer multiples of 90 degrees. |
| * |
| * - Then, auto-hint if FT_LOAD_FORCE_AUTOHINT is set or if we don't |
| * have a native font hinter. |
| * |
| * - Otherwise, auto-hint for LIGHT hinting mode or if there isn't |
| * any hinting bytecode in the TrueType/OpenType font. |
| * |
| * - Exception: The font is `tricky' and requires the native hinter to |
| * load properly. |
| */ |
| |
| if ( hinter && |
| !( load_flags & FT_LOAD_NO_HINTING ) && |
| !( load_flags & FT_LOAD_NO_AUTOHINT ) && |
| FT_DRIVER_IS_SCALABLE( driver ) && |
| FT_DRIVER_USES_OUTLINES( driver ) && |
| !FT_IS_TRICKY( face ) && |
| ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) || |
| ( face->internal->transform_matrix.yx == 0 && |
| face->internal->transform_matrix.xx != 0 ) || |
| ( face->internal->transform_matrix.xx == 0 && |
| face->internal->transform_matrix.yx != 0 ) ) ) |
| { |
| if ( ( load_flags & FT_LOAD_FORCE_AUTOHINT ) || |
| !FT_DRIVER_HAS_HINTER( driver ) ) |
| autohint = TRUE; |
| else |
| { |
| FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); |
| |
| |
| /* the check for `num_locations' assures that we actually */ |
| /* test for instructions in a TTF and not in a CFF-based OTF */ |
| /* */ |
| /* since `maxSizeOfInstructions' might be unreliable, we */ |
| /* check the size of the `fpgm' and `prep' tables, too -- */ |
| /* the assumption is that there don't exist real TTFs where */ |
| /* both `fpgm' and `prep' tables are missing */ |
| if ( mode == FT_RENDER_MODE_LIGHT || |
| face->internal->ignore_unpatented_hinter || |
| ( FT_IS_SFNT( face ) && |
| ttface->num_locations && |
| ttface->max_profile.maxSizeOfInstructions == 0 && |
| ttface->font_program_size == 0 && |
| ttface->cvt_program_size == 0 ) ) |
| autohint = TRUE; |
| } |
| } |
| |
| if ( autohint ) |
| { |
| FT_AutoHinter_Interface hinting; |
| |
| |
| /* try to load embedded bitmaps first if available */ |
| /* */ |
| /* XXX: This is really a temporary hack that should disappear */ |
| /* promptly with FreeType 2.1! */ |
| /* */ |
| if ( FT_HAS_FIXED_SIZES( face ) && |
| ( load_flags & FT_LOAD_NO_BITMAP ) == 0 ) |
| { |
| error = driver->clazz->load_glyph( slot, face->size, |
| glyph_index, |
| load_flags | FT_LOAD_SBITS_ONLY ); |
| |
| if ( !error && slot->format == FT_GLYPH_FORMAT_BITMAP ) |
| goto Load_Ok; |
| } |
| |
| { |
| FT_Face_Internal internal = face->internal; |
| FT_Int transform_flags = internal->transform_flags; |
| |
| |
| /* since the auto-hinter calls FT_Load_Glyph by itself, */ |
| /* make sure that glyphs aren't transformed */ |
| internal->transform_flags = 0; |
| |
| /* load auto-hinted outline */ |
| hinting = (FT_AutoHinter_Interface)hinter->clazz->module_interface; |
| |
| error = hinting->load_glyph( (FT_AutoHinter)hinter, |
| slot, face->size, |
| glyph_index, load_flags ); |
| |
| internal->transform_flags = transform_flags; |
| } |
| } |
| else |
| { |
| error = driver->clazz->load_glyph( slot, |
| face->size, |
| glyph_index, |
| load_flags ); |
| if ( error ) |
| goto Exit; |
| |
| if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) |
| { |
| /* check that the loaded outline is correct */ |
| error = FT_Outline_Check( &slot->outline ); |
| if ( error ) |
| goto Exit; |
| |
| #ifdef GRID_FIT_METRICS |
| if ( !( load_flags & FT_LOAD_NO_HINTING ) ) |
| ft_glyphslot_grid_fit_metrics( slot, |
| FT_BOOL( load_flags & FT_LOAD_VERTICAL_LAYOUT ) ); |
| #endif |
| } |
| } |
| |
| Load_Ok: |
| /* compute the advance */ |
| if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) |
| { |
| slot->advance.x = 0; |
| slot->advance.y = slot->metrics.vertAdvance; |
| } |
| else |
| { |
| slot->advance.x = slot->metrics.horiAdvance; |
| slot->advance.y = 0; |
| } |
| |
| /* compute the linear advance in 16.16 pixels */ |
| if ( ( load_flags & FT_LOAD_LINEAR_DESIGN ) == 0 && |
| ( FT_IS_SCALABLE( face ) ) ) |
| { |
| FT_Size_Metrics* metrics = &face->size->metrics; |
| |
| |
| /* it's tricky! */ |
| slot->linearHoriAdvance = FT_MulDiv( slot->linearHoriAdvance, |
| metrics->x_scale, 64 ); |
| |
| slot->linearVertAdvance = FT_MulDiv( slot->linearVertAdvance, |
| metrics->y_scale, 64 ); |
| } |
| |
| if ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) == 0 ) |
| { |
| FT_Face_Internal internal = face->internal; |
| |
| |
| /* now, transform the glyph image if needed */ |
| if ( internal->transform_flags ) |
| { |
| /* get renderer */ |
| FT_Renderer renderer = ft_lookup_glyph_renderer( slot ); |
| |
| |
| if ( renderer ) |
| error = renderer->clazz->transform_glyph( |
| renderer, slot, |
| &internal->transform_matrix, |
| &internal->transform_delta ); |
| else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) |
| { |
| /* apply `standard' transformation if no renderer is available */ |
| if ( internal->transform_flags & 1 ) |
| FT_Outline_Transform( &slot->outline, |
| &internal->transform_matrix ); |
| |
| if ( internal->transform_flags & 2 ) |
| FT_Outline_Translate( &slot->outline, |
| internal->transform_delta.x, |
| internal->transform_delta.y ); |
| } |
| |
| /* transform advance */ |
| FT_Vector_Transform( &slot->advance, &internal->transform_matrix ); |
| } |
| } |
| |
| FT_TRACE5(( " x advance: %d\n" , slot->advance.x )); |
| FT_TRACE5(( " y advance: %d\n" , slot->advance.y )); |
| |
| FT_TRACE5(( " linear x advance: %d\n" , slot->linearHoriAdvance )); |
| FT_TRACE5(( " linear y advance: %d\n" , slot->linearVertAdvance )); |
| |
| /* do we need to render the image now? */ |
| if ( !error && |
| slot->format != FT_GLYPH_FORMAT_BITMAP && |
| slot->format != FT_GLYPH_FORMAT_COMPOSITE && |
| load_flags & FT_LOAD_RENDER ) |
| { |
| FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); |
| |
| |
| if ( mode == FT_RENDER_MODE_NORMAL && |
| (load_flags & FT_LOAD_MONOCHROME ) ) |
| mode = FT_RENDER_MODE_MONO; |
| |
| error = FT_Render_Glyph( slot, mode ); |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Load_Char( FT_Face face, |
| FT_ULong char_code, |
| FT_Int32 load_flags ) |
| { |
| FT_UInt glyph_index; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| glyph_index = (FT_UInt)char_code; |
| if ( face->charmap ) |
| glyph_index = FT_Get_Char_Index( face, char_code ); |
| |
| return FT_Load_Glyph( face, glyph_index, load_flags ); |
| } |
| |
| |
| /* destructor for sizes list */ |
| static void |
| destroy_size( FT_Memory memory, |
| FT_Size size, |
| FT_Driver driver ) |
| { |
| /* finalize client-specific data */ |
| if ( size->generic.finalizer ) |
| size->generic.finalizer( size ); |
| |
| /* finalize format-specific stuff */ |
| if ( driver->clazz->done_size ) |
| driver->clazz->done_size( size ); |
| |
| FT_FREE( size->internal ); |
| FT_FREE( size ); |
| } |
| |
| |
| static void |
| ft_cmap_done_internal( FT_CMap cmap ); |
| |
| |
| static void |
| destroy_charmaps( FT_Face face, |
| FT_Memory memory ) |
| { |
| FT_Int n; |
| |
| |
| if ( !face ) |
| return; |
| |
| for ( n = 0; n < face->num_charmaps; n++ ) |
| { |
| FT_CMap cmap = FT_CMAP( face->charmaps[n] ); |
| |
| |
| ft_cmap_done_internal( cmap ); |
| |
| face->charmaps[n] = NULL; |
| } |
| |
| FT_FREE( face->charmaps ); |
| face->num_charmaps = 0; |
| } |
| |
| |
| /* destructor for faces list */ |
| static void |
| destroy_face( FT_Memory memory, |
| FT_Face face, |
| FT_Driver driver ) |
| { |
| FT_Driver_Class clazz = driver->clazz; |
| |
| |
| /* discard auto-hinting data */ |
| if ( face->autohint.finalizer ) |
| face->autohint.finalizer( face->autohint.data ); |
| |
| /* Discard glyph slots for this face. */ |
| /* Beware! FT_Done_GlyphSlot() changes the field `face->glyph' */ |
| while ( face->glyph ) |
| FT_Done_GlyphSlot( face->glyph ); |
| |
| /* discard all sizes for this face */ |
| FT_List_Finalize( &face->sizes_list, |
| (FT_List_Destructor)destroy_size, |
| memory, |
| driver ); |
| face->size = NULL; |
| |
| /* now discard client data */ |
| if ( face->generic.finalizer ) |
| face->generic.finalizer( face ); |
| |
| /* discard charmaps */ |
| destroy_charmaps( face, memory ); |
| |
| /* finalize format-specific stuff */ |
| if ( clazz->done_face ) |
| clazz->done_face( face ); |
| |
| /* close the stream for this face if needed */ |
| FT_Stream_Free( |
| face->stream, |
| ( face->face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0 ); |
| |
| face->stream = NULL; |
| |
| /* get rid of it */ |
| if ( face->internal ) |
| { |
| FT_FREE( face->internal ); |
| } |
| FT_FREE( face ); |
| } |
| |
| |
| static void |
| Destroy_Driver( FT_Driver driver ) |
| { |
| FT_List_Finalize( &driver->faces_list, |
| (FT_List_Destructor)destroy_face, |
| driver->root.memory, |
| driver ); |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* find_unicode_charmap */ |
| /* */ |
| /* <Description> */ |
| /* This function finds a Unicode charmap, if there is one. */ |
| /* And if there is more than one, it tries to favour the more */ |
| /* extensive one, i.e., one that supports UCS-4 against those which */ |
| /* are limited to the BMP (said UCS-2 encoding.) */ |
| /* */ |
| /* This function is called from open_face() (just below), and also */ |
| /* from FT_Select_Charmap( ..., FT_ENCODING_UNICODE ). */ |
| /* */ |
| static FT_Error |
| find_unicode_charmap( FT_Face face ) |
| { |
| FT_CharMap* first; |
| FT_CharMap* cur; |
| |
| |
| /* caller should have already checked that `face' is valid */ |
| FT_ASSERT( face ); |
| |
| first = face->charmaps; |
| |
| if ( !first ) |
| return FT_THROW( Invalid_CharMap_Handle ); |
| |
| /* |
| * The original TrueType specification(s) only specified charmap |
| * formats that are capable of mapping 8 or 16 bit character codes to |
| * glyph indices. |
| * |
| * However, recent updates to the Apple and OpenType specifications |
| * introduced new formats that are capable of mapping 32-bit character |
| * codes as well. And these are already used on some fonts, mainly to |
| * map non-BMP Asian ideographs as defined in Unicode. |
| * |
| * For compatibility purposes, these fonts generally come with |
| * *several* Unicode charmaps: |
| * |
| * - One of them in the "old" 16-bit format, that cannot access |
| * all glyphs in the font. |
| * |
| * - Another one in the "new" 32-bit format, that can access all |
| * the glyphs. |
| * |
| * This function has been written to always favor a 32-bit charmap |
| * when found. Otherwise, a 16-bit one is returned when found. |
| */ |
| |
| /* Since the `interesting' table, with IDs (3,10), is normally the */ |
| /* last one, we loop backwards. This loses with type1 fonts with */ |
| /* non-BMP characters (<.0001%), this wins with .ttf with non-BMP */ |
| /* chars (.01% ?), and this is the same about 99.99% of the time! */ |
| |
| cur = first + face->num_charmaps; /* points after the last one */ |
| |
| for ( ; --cur >= first; ) |
| { |
| if ( cur[0]->encoding == FT_ENCODING_UNICODE ) |
| { |
| /* XXX If some new encodings to represent UCS-4 are added, */ |
| /* they should be added here. */ |
| if ( ( cur[0]->platform_id == TT_PLATFORM_MICROSOFT && |
| cur[0]->encoding_id == TT_MS_ID_UCS_4 ) || |
| ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE && |
| cur[0]->encoding_id == TT_APPLE_ID_UNICODE_32 ) ) |
| { |
| face->charmap = cur[0]; |
| return FT_Err_Ok; |
| } |
| } |
| } |
| |
| /* We do not have any UCS-4 charmap. */ |
| /* Do the loop again and search for UCS-2 charmaps. */ |
| cur = first + face->num_charmaps; |
| |
| for ( ; --cur >= first; ) |
| { |
| if ( cur[0]->encoding == FT_ENCODING_UNICODE ) |
| { |
| face->charmap = cur[0]; |
| return FT_Err_Ok; |
| } |
| } |
| |
| return FT_THROW( Invalid_CharMap_Handle ); |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* find_variant_selector_charmap */ |
| /* */ |
| /* <Description> */ |
| /* This function finds the variant selector charmap, if there is one. */ |
| /* There can only be one (platform=0, specific=5, format=14). */ |
| /* */ |
| static FT_CharMap |
| find_variant_selector_charmap( FT_Face face ) |
| { |
| FT_CharMap* first; |
| FT_CharMap* end; |
| FT_CharMap* cur; |
| |
| |
| /* caller should have already checked that `face' is valid */ |
| FT_ASSERT( face ); |
| |
| first = face->charmaps; |
| |
| if ( !first ) |
| return NULL; |
| |
| end = first + face->num_charmaps; /* points after the last one */ |
| |
| for ( cur = first; cur < end; ++cur ) |
| { |
| if ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE && |
| cur[0]->encoding_id == TT_APPLE_ID_VARIANT_SELECTOR && |
| FT_Get_CMap_Format( cur[0] ) == 14 ) |
| return cur[0]; |
| } |
| |
| return NULL; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* open_face */ |
| /* */ |
| /* <Description> */ |
| /* This function does some work for FT_Open_Face(). */ |
| /* */ |
| static FT_Error |
| open_face( FT_Driver driver, |
| FT_Stream *astream, |
| FT_Bool external_stream, |
| FT_Long face_index, |
| FT_Int num_params, |
| FT_Parameter* params, |
| FT_Face *aface ) |
| { |
| FT_Memory memory; |
| FT_Driver_Class clazz; |
| FT_Face face = NULL; |
| FT_Face_Internal internal = NULL; |
| |
| FT_Error error, error2; |
| |
| |
| clazz = driver->clazz; |
| memory = driver->root.memory; |
| |
| /* allocate the face object and perform basic initialization */ |
| if ( FT_ALLOC( face, clazz->face_object_size ) ) |
| goto Fail; |
| |
| face->driver = driver; |
| face->memory = memory; |
| face->stream = *astream; |
| |
| /* set the FT_FACE_FLAG_EXTERNAL_STREAM bit for FT_Done_Face */ |
| if ( external_stream ) |
| face->face_flags |= FT_FACE_FLAG_EXTERNAL_STREAM; |
| |
| if ( FT_NEW( internal ) ) |
| goto Fail; |
| |
| face->internal = internal; |
| |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| { |
| int i; |
| |
| |
| face->internal->incremental_interface = NULL; |
| for ( i = 0; i < num_params && !face->internal->incremental_interface; |
| i++ ) |
| if ( params[i].tag == FT_PARAM_TAG_INCREMENTAL ) |
| face->internal->incremental_interface = |
| (FT_Incremental_Interface)params[i].data; |
| } |
| #endif |
| |
| if ( clazz->init_face ) |
| error = clazz->init_face( *astream, |
| face, |
| (FT_Int)face_index, |
| num_params, |
| params ); |
| *astream = face->stream; /* Stream may have been changed. */ |
| if ( error ) |
| goto Fail; |
| |
| /* select Unicode charmap by default */ |
| error2 = find_unicode_charmap( face ); |
| |
| /* if no Unicode charmap can be found, FT_Err_Invalid_CharMap_Handle */ |
| /* is returned. */ |
| |
| /* no error should happen, but we want to play safe */ |
| if ( error2 && FT_ERR_NEQ( error2, Invalid_CharMap_Handle ) ) |
| { |
| error = error2; |
| goto Fail; |
| } |
| |
| *aface = face; |
| |
| Fail: |
| if ( error ) |
| { |
| destroy_charmaps( face, memory ); |
| if ( clazz->done_face ) |
| clazz->done_face( face ); |
| FT_FREE( internal ); |
| FT_FREE( face ); |
| *aface = NULL; |
| } |
| |
| return error; |
| } |
| |
| |
| /* there's a Mac-specific extended implementation of FT_New_Face() */ |
| /* in src/base/ftmac.c */ |
| |
| #ifndef FT_MACINTOSH |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_New_Face( FT_Library library, |
| const char* pathname, |
| FT_Long face_index, |
| FT_Face *aface ) |
| { |
| FT_Open_Args args; |
| |
| |
| /* test for valid `library' and `aface' delayed to `FT_Open_Face' */ |
| if ( !pathname ) |
| return FT_THROW( Invalid_Argument ); |
| |
| args.flags = FT_OPEN_PATHNAME; |
| args.pathname = (char*)pathname; |
| args.stream = NULL; |
| |
| return FT_Open_Face( library, &args, face_index, aface ); |
| } |
| |
| #endif |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_New_Memory_Face( FT_Library library, |
| const FT_Byte* file_base, |
| FT_Long file_size, |
| FT_Long face_index, |
| FT_Face *aface ) |
| { |
| FT_Open_Args args; |
| |
| |
| /* test for valid `library' and `face' delayed to `FT_Open_Face' */ |
| if ( !file_base ) |
| return FT_THROW( Invalid_Argument ); |
| |
| args.flags = FT_OPEN_MEMORY; |
| args.memory_base = file_base; |
| args.memory_size = file_size; |
| args.stream = NULL; |
| |
| return FT_Open_Face( library, &args, face_index, aface ); |
| } |
| |
| |
| #ifdef FT_CONFIG_OPTION_MAC_FONTS |
| |
| /* The behavior here is very similar to that in base/ftmac.c, but it */ |
| /* is designed to work on non-mac systems, so no mac specific calls. */ |
| /* */ |
| /* We look at the file and determine if it is a mac dfont file or a mac */ |
| /* resource file, or a macbinary file containing a mac resource file. */ |
| /* */ |
| /* Unlike ftmac I'm not going to look at a `FOND'. I don't really see */ |
| /* the point, especially since there may be multiple `FOND' resources. */ |
| /* Instead I'll just look for `sfnt' and `POST' resources, ordered as */ |
| /* they occur in the file. */ |
| /* */ |
| /* Note that multiple `POST' resources do not mean multiple postscript */ |
| /* fonts; they all get jammed together to make what is essentially a */ |
| /* pfb file. */ |
| /* */ |
| /* We aren't interested in `NFNT' or `FONT' bitmap resources. */ |
| /* */ |
| /* As soon as we get an `sfnt' load it into memory and pass it off to */ |
| /* FT_Open_Face. */ |
| /* */ |
| /* If we have a (set of) `POST' resources, massage them into a (memory) */ |
| /* pfb file and pass that to FT_Open_Face. (As with ftmac.c I'm not */ |
| /* going to try to save the kerning info. After all that lives in the */ |
| /* `FOND' which isn't in the file containing the `POST' resources so */ |
| /* we don't really have access to it. */ |
| |
| |
| /* Finalizer for a memory stream; gets called by FT_Done_Face(). */ |
| /* It frees the memory it uses. */ |
| /* From ftmac.c. */ |
| static void |
| memory_stream_close( FT_Stream stream ) |
| { |
| FT_Memory memory = stream->memory; |
| |
| |
| FT_FREE( stream->base ); |
| |
| stream->size = 0; |
| stream->base = NULL; |
| stream->close = NULL; |
| } |
| |
| |
| /* Create a new memory stream from a buffer and a size. */ |
| /* From ftmac.c. */ |
| static FT_Error |
| new_memory_stream( FT_Library library, |
| FT_Byte* base, |
| FT_ULong size, |
| FT_Stream_CloseFunc close, |
| FT_Stream *astream ) |
| { |
| FT_Error error; |
| FT_Memory memory; |
| FT_Stream stream = NULL; |
| |
| |
| if ( !library ) |
| return FT_THROW( Invalid_Library_Handle ); |
| |
| if ( !base ) |
| return FT_THROW( Invalid_Argument ); |
| |
| *astream = NULL; |
| memory = library->memory; |
| if ( FT_NEW( stream ) ) |
| goto Exit; |
| |
| FT_Stream_OpenMemory( stream, base, size ); |
| |
| stream->close = close; |
| |
| *astream = stream; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* Create a new FT_Face given a buffer and a driver name. */ |
| /* from ftmac.c */ |
| FT_LOCAL_DEF( FT_Error ) |
| open_face_from_buffer( FT_Library library, |
| FT_Byte* base, |
| FT_ULong size, |
| FT_Long face_index, |
| const char* driver_name, |
| FT_Face *aface ) |
| { |
| FT_Open_Args args; |
| FT_Error error; |
| FT_Stream stream = NULL; |
| FT_Memory memory = library->memory; |
| |
| |
| error = new_memory_stream( library, |
| base, |
| size, |
| memory_stream_close, |
| &stream ); |
| if ( error ) |
| { |
| FT_FREE( base ); |
| return error; |
| } |
| |
| args.flags = FT_OPEN_STREAM; |
| args.stream = stream; |
| if ( driver_name ) |
| { |
| args.flags = args.flags | FT_OPEN_DRIVER; |
| args.driver = FT_Get_Module( library, driver_name ); |
| } |
| |
| #ifdef FT_MACINTOSH |
| /* At this point, face_index has served its purpose; */ |
| /* whoever calls this function has already used it to */ |
| /* locate the correct font data. We should not propagate */ |
| /* this index to FT_Open_Face() (unless it is negative). */ |
| |
| if ( face_index > 0 ) |
| face_index = 0; |
| #endif |
| |
| error = FT_Open_Face( library, &args, face_index, aface ); |
| |
| if ( error == FT_Err_Ok ) |
| (*aface)->face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM; |
| else |
| #ifdef FT_MACINTOSH |
| FT_Stream_Free( stream, 0 ); |
| #else |
| { |
| FT_Stream_Close( stream ); |
| FT_FREE( stream ); |
| } |
| #endif |
| |
| return error; |
| } |
| |
| |
| /* Look up `TYP1' or `CID ' table from sfnt table directory. */ |
| /* `offset' and `length' must exclude the binary header in tables. */ |
| |
| /* Type 1 and CID-keyed font drivers should recognize sfnt-wrapped */ |
| /* format too. Here, since we can't expect that the TrueType font */ |
| /* driver is loaded unconditially, we must parse the font by */ |
| /* ourselves. We are only interested in the name of the table and */ |
| /* the offset. */ |
| |
| static FT_Error |
| ft_lookup_PS_in_sfnt_stream( FT_Stream stream, |
| FT_Long face_index, |
| FT_ULong* offset, |
| FT_ULong* length, |
| FT_Bool* is_sfnt_cid ) |
| { |
| FT_Error error; |
| FT_UShort numTables; |
| FT_Long pstable_index; |
| FT_ULong tag; |
| int i; |
| |
| |
| *offset = 0; |
| *length = 0; |
| *is_sfnt_cid = FALSE; |
| |
| /* TODO: support for sfnt-wrapped PS/CID in TTC format */ |
| |
| /* version check for 'typ1' (should be ignored?) */ |
| if ( FT_READ_ULONG( tag ) ) |
| return error; |
| if ( tag != TTAG_typ1 ) |
| return FT_THROW( Unknown_File_Format ); |
| |
| if ( FT_READ_USHORT( numTables ) ) |
| return error; |
| if ( FT_STREAM_SKIP( 2 * 3 ) ) /* skip binary search header */ |
| return error; |
| |
| pstable_index = -1; |
| *is_sfnt_cid = FALSE; |
| |
| for ( i = 0; i < numTables; i++ ) |
| { |
| if ( FT_READ_ULONG( tag ) || FT_STREAM_SKIP( 4 ) || |
| FT_READ_ULONG( *offset ) || FT_READ_ULONG( *length ) ) |
| return error; |
| |
| if ( tag == TTAG_CID ) |
| { |
| pstable_index++; |
| *offset += 22; |
| *length -= 22; |
| *is_sfnt_cid = TRUE; |
| if ( face_index < 0 ) |
| return FT_Err_Ok; |
| } |
| else if ( tag == TTAG_TYP1 ) |
| { |
| pstable_index++; |
| *offset += 24; |
| *length -= 24; |
| *is_sfnt_cid = FALSE; |
| if ( face_index < 0 ) |
| return FT_Err_Ok; |
| } |
| if ( face_index >= 0 && pstable_index == face_index ) |
| return FT_Err_Ok; |
| } |
| return FT_THROW( Table_Missing ); |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| open_face_PS_from_sfnt_stream( FT_Library library, |
| FT_Stream stream, |
| FT_Long face_index, |
| FT_Int num_params, |
| FT_Parameter *params, |
| FT_Face *aface ) |
| { |
| FT_Error error; |
| FT_Memory memory = library->memory; |
| FT_ULong offset, length; |
| FT_ULong pos; |
| FT_Bool is_sfnt_cid; |
| FT_Byte* sfnt_ps = NULL; |
| |
| FT_UNUSED( num_params ); |
| FT_UNUSED( params ); |
| |
| |
| pos = FT_STREAM_POS(); |
| |
| error = ft_lookup_PS_in_sfnt_stream( stream, |
| face_index, |
| &offset, |
| &length, |
| &is_sfnt_cid ); |
| if ( error ) |
| goto Exit; |
| |
| if ( FT_Stream_Seek( stream, pos + offset ) ) |
| goto Exit; |
| |
| if ( FT_ALLOC( sfnt_ps, (FT_Long)length ) ) |
| goto Exit; |
| |
| error = FT_Stream_Read( stream, (FT_Byte *)sfnt_ps, length ); |
| if ( error ) |
| goto Exit; |
| |
| error = open_face_from_buffer( library, |
| sfnt_ps, |
| length, |
| FT_MIN( face_index, 0 ), |
| is_sfnt_cid ? "cid" : "type1", |
| aface ); |
| Exit: |
| { |
| FT_Error error1; |
| |
| |
| if ( FT_ERR_EQ( error, Unknown_File_Format ) ) |
| { |
| error1 = FT_Stream_Seek( stream, pos ); |
| if ( error1 ) |
| return error1; |
| } |
| |
| return error; |
| } |
| } |
| |
| |
| #ifndef FT_MACINTOSH |
| |
| /* The resource header says we've got resource_cnt `POST' (type1) */ |
| /* resources in this file. They all need to be coalesced into */ |
| /* one lump which gets passed on to the type1 driver. */ |
| /* Here can be only one PostScript font in a file so face_index */ |
| /* must be 0 (or -1). */ |
| /* */ |
| static FT_Error |
| Mac_Read_POST_Resource( FT_Library library, |
| FT_Stream stream, |
| FT_Long *offsets, |
| FT_Long resource_cnt, |
| FT_Long face_index, |
| FT_Face *aface ) |
| { |
| FT_Error error = FT_ERR( Cannot_Open_Resource ); |
| FT_Memory memory = library->memory; |
| FT_Byte* pfb_data = NULL; |
| int i, type, flags; |
| FT_ULong len; |
| FT_ULong pfb_len, pfb_pos, pfb_lenpos; |
| FT_ULong rlen, temp; |
| |
| |
| if ( face_index == -1 ) |
| face_index = 0; |
| if ( face_index != 0 ) |
| return error; |
| |
| /* Find the length of all the POST resources, concatenated. Assume */ |
| /* worst case (each resource in its own section). */ |
| pfb_len = 0; |
| for ( i = 0; i < resource_cnt; ++i ) |
| { |
| error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] ); |
| if ( error ) |
| goto Exit; |
| if ( FT_READ_ULONG( temp ) ) |
| goto Exit; |
| |
| /* FT2 allocator takes signed long buffer length, |
| * too large value causing overflow should be checked |
| */ |
| FT_TRACE4(( " POST fragment #%d: length=0x%08x\n", |
| i, temp)); |
| if ( 0x7FFFFFFFUL < temp || pfb_len + temp + 6 < pfb_len ) |
| { |
| FT_TRACE2(( " too long fragment length makes" |
| " pfb_len confused: temp=0x%08x\n", temp )); |
| error = FT_THROW( Invalid_Offset ); |
| goto Exit; |
| } |
| |
| pfb_len += temp + 6; |
| } |
| |
| FT_TRACE2(( " total buffer size to concatenate %d" |
| " POST fragments: 0x%08x\n", |
| resource_cnt, pfb_len + 2)); |
| if ( pfb_len + 2 < 6 ) { |
| FT_TRACE2(( " too long fragment length makes" |
| " pfb_len confused: pfb_len=0x%08x\n", pfb_len )); |
| error = FT_THROW( Array_Too_Large ); |
| goto Exit; |
| } |
| if ( FT_ALLOC( pfb_data, (FT_Long)pfb_len + 2 ) ) |
| goto Exit; |
| |
| pfb_data[0] = 0x80; |
| pfb_data[1] = 1; /* Ascii section */ |
| pfb_data[2] = 0; /* 4-byte length, fill in later */ |
| pfb_data[3] = 0; |
| pfb_data[4] = 0; |
| pfb_data[5] = 0; |
| pfb_pos = 6; |
| pfb_lenpos = 2; |
| |
| len = 0; |
| type = 1; |
| for ( i = 0; i < resource_cnt; ++i ) |
| { |
| error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] ); |
| if ( error ) |
| goto Exit2; |
| if ( FT_READ_ULONG( rlen ) ) |
| goto Exit2; |
| |
| /* FT2 allocator takes signed long buffer length, |
| * too large fragment length causing overflow should be checked |
| */ |
| if ( 0x7FFFFFFFUL < rlen ) |
| { |
| error = FT_THROW( Invalid_Offset ); |
| goto Exit2; |
| } |
| |
| if ( FT_READ_USHORT( flags ) ) |
| goto Exit2; |
| FT_TRACE3(( "POST fragment[%d]: offsets=0x%08x, rlen=0x%08x, flags=0x%04x\n", |
| i, offsets[i], rlen, flags )); |
| |
| error = FT_ERR( Array_Too_Large ); |
| /* postpone the check of rlen longer than buffer until FT_Stream_Read() */ |
| if ( ( flags >> 8 ) == 0 ) /* Comment, should not be loaded */ |
| { |
| FT_TRACE3(( " Skip POST fragment #%d because it is a comment\n", i )); |
| continue; |
| } |
| |
| /* the flags are part of the resource, so rlen >= 2. */ |
| /* but some fonts declare rlen = 0 for empty fragment */ |
| if ( rlen > 2 ) |
| rlen -= 2; |
| else |
| rlen = 0; |
| |
| if ( ( flags >> 8 ) == type ) |
| len += rlen; |
| else |
| { |
| FT_TRACE3(( " Write POST fragment #%d header (4-byte) to buffer" |
| " 0x%p + 0x%08x\n", i, pfb_data, pfb_lenpos )); |
| if ( pfb_lenpos + 3 > pfb_len + 2 ) |
| goto Exit2; |
| pfb_data[pfb_lenpos ] = (FT_Byte)( len ); |
| pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 ); |
| pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 ); |
| pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 ); |
| |
| if ( ( flags >> 8 ) == 5 ) /* End of font mark */ |
| break; |
| |
| FT_TRACE3(( " Write POST fragment #%d header (6-byte) to buffer" |
| " 0x%p + 0x%08x\n", i, pfb_data, pfb_pos )); |
| if ( pfb_pos + 6 > pfb_len + 2 ) |
| goto Exit2; |
| pfb_data[pfb_pos++] = 0x80; |
| |
| type = flags >> 8; |
| len = rlen; |
| |
| pfb_data[pfb_pos++] = (FT_Byte)type; |
| pfb_lenpos = pfb_pos; |
| pfb_data[pfb_pos++] = 0; /* 4-byte length, fill in later */ |
| pfb_data[pfb_pos++] = 0; |
| pfb_data[pfb_pos++] = 0; |
| pfb_data[pfb_pos++] = 0; |
| } |
| |
| if ( pfb_pos > pfb_len || pfb_pos + rlen > pfb_len ) |
| goto Exit2; |
| |
| FT_TRACE3(( " Load POST fragment #%d (%d byte) to buffer" |
| " 0x%p + 0x%08x\n", i, rlen, pfb_data, pfb_pos )); |
| error = FT_Stream_Read( stream, (FT_Byte *)pfb_data + pfb_pos, rlen ); |
| if ( error ) |
| goto Exit2; |
| pfb_pos += rlen; |
| } |
| |
| error = FT_ERR( Array_Too_Large ); |
| if ( pfb_pos + 2 > pfb_len + 2 ) |
| goto Exit2; |
| pfb_data[pfb_pos++] = 0x80; |
| pfb_data[pfb_pos++] = 3; |
| |
| if ( pfb_lenpos + 3 > pfb_len + 2 ) |
| goto Exit2; |
| pfb_data[pfb_lenpos ] = (FT_Byte)( len ); |
| pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 ); |
| pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 ); |
| pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 ); |
| |
| return open_face_from_buffer( library, |
| pfb_data, |
| pfb_pos, |
| face_index, |
| "type1", |
| aface ); |
| |
| Exit2: |
| if ( error == FT_ERR( Array_Too_Large ) ) |
| FT_TRACE2(( " Abort due to too-short buffer to store" |
| " all POST fragments\n" )); |
| else if ( error == FT_ERR( Invalid_Offset ) ) |
| FT_TRACE2(( " Abort due to invalid offset in a POST fragment\n" )); |
| if ( error ) |
| error = FT_ERR( Cannot_Open_Resource ); |
| FT_FREE( pfb_data ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* The resource header says we've got resource_cnt `sfnt' */ |
| /* (TrueType/OpenType) resources in this file. Look through */ |
| /* them for the one indicated by face_index, load it into mem, */ |
| /* pass it on the the truetype driver and return it. */ |
| /* */ |
| static FT_Error |
| Mac_Read_sfnt_Resource( FT_Library library, |
| FT_Stream stream, |
| FT_Long *offsets, |
| FT_Long resource_cnt, |
| FT_Long face_index, |
| FT_Face *aface ) |
| { |
| FT_Memory memory = library->memory; |
| FT_Byte* sfnt_data = NULL; |
| FT_Error error; |
| FT_ULong flag_offset; |
| FT_Long rlen; |
| int is_cff; |
| FT_Long face_index_in_resource = 0; |
| |
| |
| if ( face_index == -1 ) |
| face_index = 0; |
| if ( face_index >= resource_cnt ) |
| return FT_THROW( Cannot_Open_Resource ); |
| |
| flag_offset = (FT_ULong)offsets[face_index]; |
| error = FT_Stream_Seek( stream, flag_offset ); |
| if ( error ) |
| goto Exit; |
| |
| if ( FT_READ_LONG( rlen ) ) |
| goto Exit; |
| if ( rlen == -1 ) |
| return FT_THROW( Cannot_Open_Resource ); |
| |
| error = open_face_PS_from_sfnt_stream( library, |
| stream, |
| face_index, |
| 0, NULL, |
| aface ); |
| if ( !error ) |
| goto Exit; |
| |
| /* rewind sfnt stream before open_face_PS_from_sfnt_stream() */ |
| if ( FT_Stream_Seek( stream, flag_offset + 4 ) ) |
| goto Exit; |
| |
| if ( FT_ALLOC( sfnt_data, rlen ) ) |
| return error; |
| error = FT_Stream_Read( stream, (FT_Byte *)sfnt_data, (FT_ULong)rlen ); |
| if ( error ) |
| goto Exit; |
| |
| is_cff = rlen > 4 && !ft_memcmp( sfnt_data, "OTTO", 4 ); |
| error = open_face_from_buffer( library, |
| sfnt_data, |
| (FT_ULong)rlen, |
| face_index_in_resource, |
| is_cff ? "cff" : "truetype", |
| aface ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* Check for a valid resource fork header, or a valid dfont */ |
| /* header. In a resource fork the first 16 bytes are repeated */ |
| /* at the location specified by bytes 4-7. In a dfont bytes */ |
| /* 4-7 point to 16 bytes of zeroes instead. */ |
| /* */ |
| static FT_Error |
| IsMacResource( FT_Library library, |
| FT_Stream stream, |
| FT_Long resource_offset, |
| FT_Long face_index, |
| FT_Face *aface ) |
| { |
| FT_Memory memory = library->memory; |
| FT_Error error; |
| FT_Long map_offset, rdara_pos; |
| FT_Long *data_offsets; |
| FT_Long count; |
| |
| |
| error = FT_Raccess_Get_HeaderInfo( library, stream, resource_offset, |
| &map_offset, &rdara_pos ); |
| if ( error ) |
| return error; |
| |
| /* POST resources must be sorted to concatenate properly */ |
| error = FT_Raccess_Get_DataOffsets( library, stream, |
| map_offset, rdara_pos, |
| TTAG_POST, TRUE, |
| &data_offsets, &count ); |
| if ( !error ) |
| { |
| error = Mac_Read_POST_Resource( library, stream, data_offsets, count, |
| face_index, aface ); |
| FT_FREE( data_offsets ); |
| /* POST exists in an LWFN providing a single face */ |
| if ( !error ) |
| (*aface)->num_faces = 1; |
| return error; |
| } |
| |
| /* sfnt resources should not be sorted to preserve the face order by |
| QuickDraw API */ |
| error = FT_Raccess_Get_DataOffsets( library, stream, |
| map_offset, rdara_pos, |
| TTAG_sfnt, FALSE, |
| &data_offsets, &count ); |
| if ( !error ) |
| { |
| FT_Long face_index_internal = face_index % count; |
| |
| |
| error = Mac_Read_sfnt_Resource( library, stream, data_offsets, count, |
| face_index_internal, aface ); |
| FT_FREE( data_offsets ); |
| if ( !error ) |
| (*aface)->num_faces = count; |
| } |
| |
| return error; |
| } |
| |
| |
| /* Check for a valid macbinary header, and if we find one */ |
| /* check that the (flattened) resource fork in it is valid. */ |
| /* */ |
| static FT_Error |
| IsMacBinary( FT_Library library, |
| FT_Stream stream, |
| FT_Long face_index, |
| FT_Face *aface ) |
| { |
| unsigned char header[128]; |
| FT_Error error; |
| FT_Long dlen, offset; |
| |
| |
| if ( NULL == stream ) |
| return FT_THROW( Invalid_Stream_Operation ); |
| |
| error = FT_Stream_Seek( stream, 0 ); |
| if ( error ) |
| goto Exit; |
| |
| error = FT_Stream_Read( stream, (FT_Byte*)header, 128 ); |
| if ( error ) |
| goto Exit; |
| |
| if ( header[ 0] != 0 || |
| header[74] != 0 || |
| header[82] != 0 || |
| header[ 1] == 0 || |
| header[ 1] > 33 || |
| header[63] != 0 || |
| header[2 + header[1]] != 0 ) |
| return FT_THROW( Unknown_File_Format ); |
| |
| dlen = ( header[0x53] << 24 ) | |
| ( header[0x54] << 16 ) | |
| ( header[0x55] << 8 ) | |
| header[0x56]; |
| #if 0 |
| rlen = ( header[0x57] << 24 ) | |
| ( header[0x58] << 16 ) | |
| ( header[0x59] << 8 ) | |
| header[0x5A]; |
| #endif /* 0 */ |
| offset = 128 + ( ( dlen + 127 ) & ~127 ); |
| |
| return IsMacResource( library, stream, offset, face_index, aface ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| static FT_Error |
| load_face_in_embedded_rfork( FT_Library library, |
| FT_Stream stream, |
| FT_Long face_index, |
| FT_Face *aface, |
| const FT_Open_Args *args ) |
| { |
| |
| #undef FT_COMPONENT |
| #define FT_COMPONENT trace_raccess |
| |
| FT_Memory memory = library->memory; |
| FT_Error error = FT_ERR( Unknown_File_Format ); |
| FT_UInt i; |
| |
| char * file_names[FT_RACCESS_N_RULES]; |
| FT_Long offsets[FT_RACCESS_N_RULES]; |
| FT_Error errors[FT_RACCESS_N_RULES]; |
| FT_Bool is_darwin_vfs, vfs_rfork_has_no_font = FALSE; /* not tested */ |
| |
| FT_Open_Args args2; |
| FT_Stream stream2 = NULL; |
| |
| |
| FT_Raccess_Guess( library, stream, |
| args->pathname, file_names, offsets, errors ); |
| |
| for ( i = 0; i < FT_RACCESS_N_RULES; i++ ) |
| { |
| is_darwin_vfs = ft_raccess_rule_by_darwin_vfs( library, i ); |
| if ( is_darwin_vfs && vfs_rfork_has_no_font ) |
| { |
| FT_TRACE3(( "Skip rule %d: darwin vfs resource fork" |
| " is already checked and" |
| " no font is found\n", i )); |
| continue; |
| } |
| |
| if ( errors[i] ) |
| { |
| FT_TRACE3(( "Error[%d] has occurred in rule %d\n", errors[i], i )); |
| continue; |
| } |
| |
| args2.flags = FT_OPEN_PATHNAME; |
| args2.pathname = file_names[i] ? file_names[i] : args->pathname; |
| |
| FT_TRACE3(( "Try rule %d: %s (offset=%d) ...", |
| i, args2.pathname, offsets[i] )); |
| |
| error = FT_Stream_New( library, &args2, &stream2 ); |
| if ( is_darwin_vfs && FT_ERR_EQ( error, Cannot_Open_Stream ) ) |
| vfs_rfork_has_no_font = TRUE; |
| |
| if ( error ) |
| { |
| FT_TRACE3(( "failed\n" )); |
| continue; |
| } |
| |
| error = IsMacResource( library, stream2, offsets[i], |
| face_index, aface ); |
| FT_Stream_Free( stream2, 0 ); |
| |
| FT_TRACE3(( "%s\n", error ? "failed": "successful" )); |
| |
| if ( !error ) |
| break; |
| else if ( is_darwin_vfs ) |
| vfs_rfork_has_no_font = TRUE; |
| } |
| |
| for (i = 0; i < FT_RACCESS_N_RULES; i++) |
| { |
| if ( file_names[i] ) |
| FT_FREE( file_names[i] ); |
| } |
| |
| /* Caller (load_mac_face) requires FT_Err_Unknown_File_Format. */ |
| if ( error ) |
| error = FT_ERR( Unknown_File_Format ); |
| |
| return error; |
| |
| #undef FT_COMPONENT |
| #define FT_COMPONENT trace_objs |
| |
| } |
| |
| |
| /* Check for some macintosh formats without Carbon framework. */ |
| /* Is this a macbinary file? If so look at the resource fork. */ |
| /* Is this a mac dfont file? */ |
| /* Is this an old style resource fork? (in data) */ |
| /* Else call load_face_in_embedded_rfork to try extra rules */ |
| /* (defined in `ftrfork.c'). */ |
| /* */ |
| static FT_Error |
| load_mac_face( FT_Library library, |
| FT_Stream stream, |
| FT_Long face_index, |
| FT_Face *aface, |
| const FT_Open_Args *args ) |
| { |
| FT_Error error; |
| FT_UNUSED( args ); |
| |
| |
| error = IsMacBinary( library, stream, face_index, aface ); |
| if ( FT_ERR_EQ( error, Unknown_File_Format ) ) |
| { |
| |
| #undef FT_COMPONENT |
| #define FT_COMPONENT trace_raccess |
| |
| FT_TRACE3(( "Try as dfont: %s ...", args->pathname )); |
| |
| error = IsMacResource( library, stream, 0, face_index, aface ); |
| |
| FT_TRACE3(( "%s\n", error ? "failed" : "successful" )); |
| |
| #undef FT_COMPONENT |
| #define FT_COMPONENT trace_objs |
| |
| } |
| |
| if ( ( FT_ERR_EQ( error, Unknown_File_Format ) || |
| FT_ERR_EQ( error, Invalid_Stream_Operation ) ) && |
| ( args->flags & FT_OPEN_PATHNAME ) ) |
| error = load_face_in_embedded_rfork( library, stream, |
| face_index, aface, args ); |
| return error; |
| } |
| #endif |
| |
| #endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */ |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Open_Face( FT_Library library, |
| const FT_Open_Args* args, |
| FT_Long face_index, |
| FT_Face *aface ) |
| { |
| FT_Error error; |
| FT_Driver driver = NULL; |
| FT_Memory memory = NULL; |
| FT_Stream stream = NULL; |
| FT_Face face = NULL; |
| FT_ListNode node = NULL; |
| FT_Bool external_stream; |
| FT_Module* cur; |
| FT_Module* limit; |
| |
| |
| /* test for valid `library' delayed to `FT_Stream_New' */ |
| |
| if ( ( !aface && face_index >= 0 ) || !args ) |
| return FT_THROW( Invalid_Argument ); |
| |
| external_stream = FT_BOOL( ( args->flags & FT_OPEN_STREAM ) && |
| args->stream ); |
| |
| /* create input stream */ |
| error = FT_Stream_New( library, args, &stream ); |
| if ( error ) |
| goto Fail3; |
| |
| memory = library->memory; |
| |
| /* If the font driver is specified in the `args' structure, use */ |
| /* it. Otherwise, we scan the list of registered drivers. */ |
| if ( ( args->flags & FT_OPEN_DRIVER ) && args->driver ) |
| { |
| driver = FT_DRIVER( args->driver ); |
| |
| /* not all modules are drivers, so check... */ |
| if ( FT_MODULE_IS_DRIVER( driver ) ) |
| { |
| FT_Int num_params = 0; |
| FT_Parameter* params = NULL; |
| |
| |
| if ( args->flags & FT_OPEN_PARAMS ) |
| { |
| num_params = args->num_params; |
| params = args->params; |
| } |
| |
| error = open_face( driver, &stream, external_stream, face_index, |
| num_params, params, &face ); |
| if ( !error ) |
| goto Success; |
| } |
| else |
| error = FT_THROW( Invalid_Handle ); |
| |
| FT_Stream_Free( stream, external_stream ); |
| goto Fail; |
| } |
| else |
| { |
| error = FT_ERR( Missing_Module ); |
| |
| /* check each font driver for an appropriate format */ |
| cur = library->modules; |
| limit = cur + library->num_modules; |
| |
| for ( ; cur < limit; cur++ ) |
| { |
| /* not all modules are font drivers, so check... */ |
| if ( FT_MODULE_IS_DRIVER( cur[0] ) ) |
| { |
| FT_Int num_params = 0; |
| FT_Parameter* params = NULL; |
| |
| |
| driver = FT_DRIVER( cur[0] ); |
| |
| if ( args->flags & FT_OPEN_PARAMS ) |
| { |
| num_params = args->num_params; |
| params = args->params; |
| } |
| |
| error = open_face( driver, &stream, external_stream, face_index, |
| num_params, params, &face ); |
| if ( !error ) |
| goto Success; |
| |
| #ifdef FT_CONFIG_OPTION_MAC_FONTS |
| if ( ft_strcmp( cur[0]->clazz->module_name, "truetype" ) == 0 && |
| FT_ERR_EQ( error, Table_Missing ) ) |
| { |
| /* TrueType but essential tables are missing */ |
| if ( FT_Stream_Seek( stream, 0 ) ) |
| break; |
| |
| error = open_face_PS_from_sfnt_stream( library, |
| stream, |
| face_index, |
| num_params, |
| params, |
| aface ); |
| if ( !error ) |
| { |
| FT_Stream_Free( stream, external_stream ); |
| return error; |
| } |
| } |
| #endif |
| |
| if ( FT_ERR_NEQ( error, Unknown_File_Format ) ) |
| goto Fail3; |
| } |
| } |
| |
| Fail3: |
| /* If we are on the mac, and we get an */ |
| /* FT_Err_Invalid_Stream_Operation it may be because we have an */ |
| /* empty data fork, so we need to check the resource fork. */ |
| if ( FT_ERR_NEQ( error, Cannot_Open_Stream ) && |
| FT_ERR_NEQ( error, Unknown_File_Format ) && |
| FT_ERR_NEQ( error, Invalid_Stream_Operation ) ) |
| goto Fail2; |
| |
| #if !defined( FT_MACINTOSH ) && defined( FT_CONFIG_OPTION_MAC_FONTS ) |
| error = load_mac_face( library, stream, face_index, aface, args ); |
| if ( !error ) |
| { |
| /* We don't want to go to Success here. We've already done that. */ |
| /* On the other hand, if we succeeded we still need to close this */ |
| /* stream (we opened a different stream which extracted the */ |
| /* interesting information out of this stream here. That stream */ |
| /* will still be open and the face will point to it). */ |
| FT_Stream_Free( stream, external_stream ); |
| return error; |
| } |
| |
| if ( FT_ERR_NEQ( error, Unknown_File_Format ) ) |
| goto Fail2; |
| #endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */ |
| |
| /* no driver is able to handle this format */ |
| error = FT_THROW( Unknown_File_Format ); |
| |
| Fail2: |
| FT_Stream_Free( stream, external_stream ); |
| goto Fail; |
| } |
| |
| Success: |
| FT_TRACE4(( "FT_Open_Face: New face object, adding to list\n" )); |
| |
| /* add the face object to its driver's list */ |
| if ( FT_NEW( node ) ) |
| goto Fail; |
| |
| node->data = face; |
| /* don't assume driver is the same as face->driver, so use */ |
| /* face->driver instead. */ |
| FT_List_Add( &face->driver->faces_list, node ); |
| |
| /* now allocate a glyph slot object for the face */ |
| FT_TRACE4(( "FT_Open_Face: Creating glyph slot\n" )); |
| |
| if ( face_index >= 0 ) |
| { |
| error = FT_New_GlyphSlot( face, NULL ); |
| if ( error ) |
| goto Fail; |
| |
| /* finally, allocate a size object for the face */ |
| { |
| FT_Size size; |
| |
| |
| FT_TRACE4(( "FT_Open_Face: Creating size object\n" )); |
| |
| error = FT_New_Size( face, &size ); |
| if ( error ) |
| goto Fail; |
| |
| face->size = size; |
| } |
| } |
| |
| /* some checks */ |
| |
| if ( FT_IS_SCALABLE( face ) ) |
| { |
| if ( face->height < 0 ) |
| face->height = (FT_Short)-face->height; |
| |
| if ( !FT_HAS_VERTICAL( face ) ) |
| face->max_advance_height = (FT_Short)face->height; |
| } |
| |
| if ( FT_HAS_FIXED_SIZES( face ) ) |
| { |
| FT_Int i; |
| |
| |
| for ( i = 0; i < face->num_fixed_sizes; i++ ) |
| { |
| FT_Bitmap_Size* bsize = face->available_sizes + i; |
| |
| |
| if ( bsize->height < 0 ) |
| bsize->height = (FT_Short)-bsize->height; |
| if ( bsize->x_ppem < 0 ) |
| bsize->x_ppem = (FT_Short)-bsize->x_ppem; |
| if ( bsize->y_ppem < 0 ) |
| bsize->y_ppem = -bsize->y_ppem; |
| } |
| } |
| |
| /* initialize internal face data */ |
| { |
| FT_Face_Internal internal = face->internal; |
| |
| |
| internal->transform_matrix.xx = 0x10000L; |
| internal->transform_matrix.xy = 0; |
| internal->transform_matrix.yx = 0; |
| internal->transform_matrix.yy = 0x10000L; |
| |
| internal->transform_delta.x = 0; |
| internal->transform_delta.y = 0; |
| |
| internal->refcount = 1; |
| } |
| |
| if ( aface ) |
| *aface = face; |
| else |
| FT_Done_Face( face ); |
| |
| goto Exit; |
| |
| Fail: |
| if ( node ) |
| FT_Done_Face( face ); /* face must be in the driver's list */ |
| else if ( face ) |
| destroy_face( memory, face, driver ); |
| |
| Exit: |
| FT_TRACE4(( "FT_Open_Face: Return %d\n", error )); |
| |
| return error; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Attach_File( FT_Face face, |
| const char* filepathname ) |
| { |
| FT_Open_Args open; |
| |
| |
| /* test for valid `face' delayed to `FT_Attach_Stream' */ |
| |
| if ( !filepathname ) |
| return FT_THROW( Invalid_Argument ); |
| |
| open.stream = NULL; |
| open.flags = FT_OPEN_PATHNAME; |
| open.pathname = (char*)filepathname; |
| |
| return FT_Attach_Stream( face, &open ); |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Attach_Stream( FT_Face face, |
| FT_Open_Args* parameters ) |
| { |
| FT_Stream stream; |
| FT_Error error; |
| FT_Driver driver; |
| |
| FT_Driver_Class clazz; |
| |
| |
| /* test for valid `parameters' delayed to `FT_Stream_New' */ |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| driver = face->driver; |
| if ( !driver ) |
| return FT_THROW( Invalid_Driver_Handle ); |
| |
| error = FT_Stream_New( driver->root.library, parameters, &stream ); |
| if ( error ) |
| goto Exit; |
| |
| /* we implement FT_Attach_Stream in each driver through the */ |
| /* `attach_file' interface */ |
| |
| error = FT_ERR( Unimplemented_Feature ); |
| clazz = driver->clazz; |
| if ( clazz->attach_file ) |
| error = clazz->attach_file( face, stream ); |
| |
| /* close the attached stream */ |
| FT_Stream_Free( stream, |
| (FT_Bool)( parameters->stream && |
| ( parameters->flags & FT_OPEN_STREAM ) ) ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Reference_Face( FT_Face face ) |
| { |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| face->internal->refcount++; |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Done_Face( FT_Face face ) |
| { |
| FT_Error error; |
| FT_Driver driver; |
| FT_Memory memory; |
| FT_ListNode node; |
| |
| |
| error = FT_ERR( Invalid_Face_Handle ); |
| if ( face && face->driver ) |
| { |
| face->internal->refcount--; |
| if ( face->internal->refcount > 0 ) |
| error = FT_Err_Ok; |
| else |
| { |
| driver = face->driver; |
| memory = driver->root.memory; |
| |
| /* find face in driver's list */ |
| node = FT_List_Find( &driver->faces_list, face ); |
| if ( node ) |
| { |
| /* remove face object from the driver's list */ |
| FT_List_Remove( &driver->faces_list, node ); |
| FT_FREE( node ); |
| |
| /* now destroy the object proper */ |
| destroy_face( memory, face, driver ); |
| error = FT_Err_Ok; |
| } |
| } |
| } |
| |
| return error; |
| } |
| |
| |
| /* documentation is in ftobjs.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_New_Size( FT_Face face, |
| FT_Size *asize ) |
| { |
| FT_Error error; |
| FT_Memory memory; |
| FT_Driver driver; |
| FT_Driver_Class clazz; |
| |
| FT_Size size = NULL; |
| FT_ListNode node = NULL; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( !asize ) |
| return FT_THROW( Invalid_Argument ); |
| |
| if ( !face->driver ) |
| return FT_THROW( Invalid_Driver_Handle ); |
| |
| *asize = NULL; |
| |
| driver = face->driver; |
| clazz = driver->clazz; |
| memory = face->memory; |
| |
| /* Allocate new size object and perform basic initialisation */ |
| if ( FT_ALLOC( size, clazz->size_object_size ) || FT_NEW( node ) ) |
| goto Exit; |
| |
| size->face = face; |
| |
| /* for now, do not use any internal fields in size objects */ |
| size->internal = NULL; |
| |
| if ( clazz->init_size ) |
| error = clazz->init_size( size ); |
| |
| /* in case of success, add to the face's list */ |
| if ( !error ) |
| { |
| *asize = size; |
| node->data = size; |
| FT_List_Add( &face->sizes_list, node ); |
| } |
| |
| Exit: |
| if ( error ) |
| { |
| FT_FREE( node ); |
| FT_FREE( size ); |
| } |
| |
| return error; |
| } |
| |
| |
| /* documentation is in ftobjs.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Done_Size( FT_Size size ) |
| { |
| FT_Error error; |
| FT_Driver driver; |
| FT_Memory memory; |
| FT_Face face; |
| FT_ListNode node; |
| |
| |
| if ( !size ) |
| return FT_THROW( Invalid_Size_Handle ); |
| |
| face = size->face; |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| driver = face->driver; |
| if ( !driver ) |
| return FT_THROW( Invalid_Driver_Handle ); |
| |
| memory = driver->root.memory; |
| |
| error = FT_Err_Ok; |
| node = FT_List_Find( &face->sizes_list, size ); |
| if ( node ) |
| { |
| FT_List_Remove( &face->sizes_list, node ); |
| FT_FREE( node ); |
| |
| if ( face->size == size ) |
| { |
| face->size = NULL; |
| if ( face->sizes_list.head ) |
| face->size = (FT_Size)(face->sizes_list.head->data); |
| } |
| |
| destroy_size( memory, size, driver ); |
| } |
| else |
| error = FT_THROW( Invalid_Size_Handle ); |
| |
| return error; |
| } |
| |
| |
| /* documentation is in ftobjs.h */ |
| |
| FT_BASE_DEF( FT_Error ) |
| FT_Match_Size( FT_Face face, |
| FT_Size_Request req, |
| FT_Bool ignore_width, |
| FT_ULong* size_index ) |
| { |
| FT_Int i; |
| FT_Long w, h; |
| |
| |
| if ( !FT_HAS_FIXED_SIZES( face ) ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| /* FT_Bitmap_Size doesn't provide enough info... */ |
| if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL ) |
| return FT_THROW( Unimplemented_Feature ); |
| |
| w = FT_REQUEST_WIDTH ( req ); |
| h = FT_REQUEST_HEIGHT( req ); |
| |
| if ( req->width && !req->height ) |
| h = w; |
| else if ( !req->width && req->height ) |
| w = h; |
| |
| w = FT_PIX_ROUND( w ); |
| h = FT_PIX_ROUND( h ); |
| |
| for ( i = 0; i < face->num_fixed_sizes; i++ ) |
| { |
| FT_Bitmap_Size* bsize = face->available_sizes + i; |
| |
| |
| if ( h != FT_PIX_ROUND( bsize->y_ppem ) ) |
| continue; |
| |
| if ( w == FT_PIX_ROUND( bsize->x_ppem ) || ignore_width ) |
| { |
| FT_TRACE3(( "FT_Match_Size: bitmap strike %d matches\n", i )); |
| |
| if ( size_index ) |
| *size_index = (FT_ULong)i; |
| |
| return FT_Err_Ok; |
| } |
| } |
| |
| return FT_THROW( Invalid_Pixel_Size ); |
| } |
| |
| |
| /* documentation is in ftobjs.h */ |
| |
| FT_BASE_DEF( void ) |
| ft_synthesize_vertical_metrics( FT_Glyph_Metrics* metrics, |
| FT_Pos advance ) |
| { |
| FT_Pos height = metrics->height; |
| |
| |
| /* compensate for glyph with bbox above/below the baseline */ |
| if ( metrics->horiBearingY < 0 ) |
| { |
| if ( height < metrics->horiBearingY ) |
| height = metrics->horiBearingY; |
| } |
| else if ( metrics->horiBearingY > 0 ) |
| height -= metrics->horiBearingY; |
| |
| /* the factor 1.2 is a heuristical value */ |
| if ( !advance ) |
| advance = height * 12 / 10; |
| |
| metrics->vertBearingX = metrics->horiBearingX - metrics->horiAdvance / 2; |
| metrics->vertBearingY = ( advance - height ) / 2; |
| metrics->vertAdvance = advance; |
| } |
| |
| |
| static void |
| ft_recompute_scaled_metrics( FT_Face face, |
| FT_Size_Metrics* metrics ) |
| { |
| /* Compute root ascender, descender, test height, and max_advance */ |
| |
| #ifdef GRID_FIT_METRICS |
| metrics->ascender = FT_PIX_CEIL( FT_MulFix( face->ascender, |
| metrics->y_scale ) ); |
| |
| metrics->descender = FT_PIX_FLOOR( FT_MulFix( face->descender, |
| metrics->y_scale ) ); |
| |
| metrics->height = FT_PIX_ROUND( FT_MulFix( face->height, |
| metrics->y_scale ) ); |
| |
| metrics->max_advance = FT_PIX_ROUND( FT_MulFix( face->max_advance_width, |
| metrics->x_scale ) ); |
| #else /* !GRID_FIT_METRICS */ |
| metrics->ascender = FT_MulFix( face->ascender, |
| metrics->y_scale ); |
| |
| metrics->descender = FT_MulFix( face->descender, |
| metrics->y_scale ); |
| |
| metrics->height = FT_MulFix( face->height, |
| metrics->y_scale ); |
| |
| metrics->max_advance = FT_MulFix( face->max_advance_width, |
| metrics->x_scale ); |
| #endif /* !GRID_FIT_METRICS */ |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| FT_Select_Metrics( FT_Face face, |
| FT_ULong strike_index ) |
| { |
| FT_Size_Metrics* metrics; |
| FT_Bitmap_Size* bsize; |
| |
| |
| metrics = &face->size->metrics; |
| bsize = face->available_sizes + strike_index; |
| |
| metrics->x_ppem = (FT_UShort)( ( bsize->x_ppem + 32 ) >> 6 ); |
| metrics->y_ppem = (FT_UShort)( ( bsize->y_ppem + 32 ) >> 6 ); |
| |
| if ( FT_IS_SCALABLE( face ) ) |
| { |
| metrics->x_scale = FT_DivFix( bsize->x_ppem, |
| face->units_per_EM ); |
| metrics->y_scale = FT_DivFix( bsize->y_ppem, |
| face->units_per_EM ); |
| |
| ft_recompute_scaled_metrics( face, metrics ); |
| } |
| else |
| { |
| metrics->x_scale = 1L << 16; |
| metrics->y_scale = 1L << 16; |
| metrics->ascender = bsize->y_ppem; |
| metrics->descender = 0; |
| metrics->height = bsize->height << 6; |
| metrics->max_advance = bsize->x_ppem; |
| } |
| |
| FT_TRACE5(( "FT_Select_Metrics:\n" )); |
| FT_TRACE5(( " x scale: %d (%f)\n", |
| metrics->x_scale, metrics->x_scale / 65536.0 )); |
| FT_TRACE5(( " y scale: %d (%f)\n", |
| metrics->y_scale, metrics->y_scale / 65536.0 )); |
| FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); |
| FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); |
| FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); |
| FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); |
| FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); |
| FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| FT_Request_Metrics( FT_Face face, |
| FT_Size_Request req ) |
| { |
| FT_Size_Metrics* metrics; |
| |
| |
| metrics = &face->size->metrics; |
| |
| if ( FT_IS_SCALABLE( face ) ) |
| { |
| FT_Long w = 0, h = 0, scaled_w = 0, scaled_h = 0; |
| |
| |
| switch ( req->type ) |
| { |
| case FT_SIZE_REQUEST_TYPE_NOMINAL: |
| w = h = face->units_per_EM; |
| break; |
| |
| case FT_SIZE_REQUEST_TYPE_REAL_DIM: |
| w = h = face->ascender - face->descender; |
| break; |
| |
| case FT_SIZE_REQUEST_TYPE_BBOX: |
| w = face->bbox.xMax - face->bbox.xMin; |
| h = face->bbox.yMax - face->bbox.yMin; |
| break; |
| |
| case FT_SIZE_REQUEST_TYPE_CELL: |
| w = face->max_advance_width; |
| h = face->ascender - face->descender; |
| break; |
| |
| case FT_SIZE_REQUEST_TYPE_SCALES: |
| metrics->x_scale = (FT_Fixed)req->width; |
| metrics->y_scale = (FT_Fixed)req->height; |
| if ( !metrics->x_scale ) |
| metrics->x_scale = metrics->y_scale; |
| else if ( !metrics->y_scale ) |
| metrics->y_scale = metrics->x_scale; |
| goto Calculate_Ppem; |
| |
| case FT_SIZE_REQUEST_TYPE_MAX: |
| break; |
| } |
| |
| /* to be on the safe side */ |
| if ( w < 0 ) |
| w = -w; |
| |
| if ( h < 0 ) |
| h = -h; |
| |
| scaled_w = FT_REQUEST_WIDTH ( req ); |
| scaled_h = FT_REQUEST_HEIGHT( req ); |
| |
| /* determine scales */ |
| if ( req->width ) |
| { |
| metrics->x_scale = FT_DivFix( scaled_w, w ); |
| |
| if ( req->height ) |
| { |
| metrics->y_scale = FT_DivFix( scaled_h, h ); |
| |
| if ( req->type == FT_SIZE_REQUEST_TYPE_CELL ) |
| { |
| if ( metrics->y_scale > metrics->x_scale ) |
| metrics->y_scale = metrics->x_scale; |
| else |
| metrics->x_scale = metrics->y_scale; |
| } |
| } |
| else |
| { |
| metrics->y_scale = metrics->x_scale; |
| scaled_h = FT_MulDiv( scaled_w, h, w ); |
| } |
| } |
| else |
| { |
| metrics->x_scale = metrics->y_scale = FT_DivFix( scaled_h, h ); |
| scaled_w = FT_MulDiv( scaled_h, w, h ); |
| } |
| |
| Calculate_Ppem: |
| /* calculate the ppems */ |
| if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL ) |
| { |
| scaled_w = FT_MulFix( face->units_per_EM, metrics->x_scale ); |
| scaled_h = FT_MulFix( face->units_per_EM, metrics->y_scale ); |
| } |
| |
| metrics->x_ppem = (FT_UShort)( ( scaled_w + 32 ) >> 6 ); |
| metrics->y_ppem = (FT_UShort)( ( scaled_h + 32 ) >> 6 ); |
| |
| ft_recompute_scaled_metrics( face, metrics ); |
| } |
| else |
| { |
| FT_ZERO( metrics ); |
| metrics->x_scale = 1L << 16; |
| metrics->y_scale = 1L << 16; |
| } |
| |
| FT_TRACE5(( "FT_Request_Metrics:\n" )); |
| FT_TRACE5(( " x scale: %d (%f)\n", |
| metrics->x_scale, metrics->x_scale / 65536.0 )); |
| FT_TRACE5(( " y scale: %d (%f)\n", |
| metrics->y_scale, metrics->y_scale / 65536.0 )); |
| FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); |
| FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); |
| FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); |
| FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); |
| FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); |
| FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Select_Size( FT_Face face, |
| FT_Int strike_index ) |
| { |
| FT_Driver_Class clazz; |
| |
| |
| if ( !face || !FT_HAS_FIXED_SIZES( face ) ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( strike_index < 0 || strike_index >= face->num_fixed_sizes ) |
| return FT_THROW( Invalid_Argument ); |
| |
| clazz = face->driver->clazz; |
| |
| if ( clazz->select_size ) |
| { |
| FT_Error error; |
| |
| |
| error = clazz->select_size( face->size, (FT_ULong)strike_index ); |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| { |
| FT_Size_Metrics* metrics = &face->size->metrics; |
| |
| |
| FT_TRACE5(( "FT_Select_Size (font driver's `select_size'):\n" )); |
| FT_TRACE5(( " x scale: %d (%f)\n", |
| metrics->x_scale, metrics->x_scale / 65536.0 )); |
| FT_TRACE5(( " y scale: %d (%f)\n", |
| metrics->y_scale, metrics->y_scale / 65536.0 )); |
| FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); |
| FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); |
| FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); |
| FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); |
| FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); |
| FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); |
| } |
| #endif |
| |
| return error; |
| } |
| |
| FT_Select_Metrics( face, (FT_ULong)strike_index ); |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Request_Size( FT_Face face, |
| FT_Size_Request req ) |
| { |
| FT_Driver_Class clazz; |
| FT_ULong strike_index; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( !req || req->width < 0 || req->height < 0 || |
| req->type >= FT_SIZE_REQUEST_TYPE_MAX ) |
| return FT_THROW( Invalid_Argument ); |
| |
| clazz = face->driver->clazz; |
| |
| if ( clazz->request_size ) |
| { |
| FT_Error error; |
| |
| |
| error = clazz->request_size( face->size, req ); |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| { |
| FT_Size_Metrics* metrics = &face->size->metrics; |
| |
| |
| FT_TRACE5(( "FT_Request_Size (font driver's `request_size'):\n" )); |
| FT_TRACE5(( " x scale: %d (%f)\n", |
| metrics->x_scale, metrics->x_scale / 65536.0 )); |
| FT_TRACE5(( " y scale: %d (%f)\n", |
| metrics->y_scale, metrics->y_scale / 65536.0 )); |
| FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); |
| FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); |
| FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); |
| FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); |
| FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); |
| FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); |
| } |
| #endif |
| |
| return error; |
| } |
| |
| /* |
| * The reason that a driver doesn't have `request_size' defined is |
| * either that the scaling here suffices or that the supported formats |
| * are bitmap-only and size matching is not implemented. |
| * |
| * In the latter case, a simple size matching is done. |
| */ |
| if ( !FT_IS_SCALABLE( face ) && FT_HAS_FIXED_SIZES( face ) ) |
| { |
| FT_Error error; |
| |
| |
| error = FT_Match_Size( face, req, 0, &strike_index ); |
| if ( error ) |
| return error; |
| |
| return FT_Select_Size( face, (FT_Int)strike_index ); |
| } |
| |
| FT_Request_Metrics( face, req ); |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Set_Char_Size( FT_Face face, |
| FT_F26Dot6 char_width, |
| FT_F26Dot6 char_height, |
| FT_UInt horz_resolution, |
| FT_UInt vert_resolution ) |
| { |
| FT_Size_RequestRec req; |
| |
| |
| /* check of `face' delayed to `FT_Request_Size' */ |
| |
| if ( !char_width ) |
| char_width = char_height; |
| else if ( !char_height ) |
| char_height = char_width; |
| |
| if ( !horz_resolution ) |
| horz_resolution = vert_resolution; |
| else if ( !vert_resolution ) |
| vert_resolution = horz_resolution; |
| |
| if ( char_width < 1 * 64 ) |
| char_width = 1 * 64; |
| if ( char_height < 1 * 64 ) |
| char_height = 1 * 64; |
| |
| if ( !horz_resolution ) |
| horz_resolution = vert_resolution = 72; |
| |
| req.type = FT_SIZE_REQUEST_TYPE_NOMINAL; |
| req.width = char_width; |
| req.height = char_height; |
| req.horiResolution = horz_resolution; |
| req.vertResolution = vert_resolution; |
| |
| return FT_Request_Size( face, &req ); |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Set_Pixel_Sizes( FT_Face face, |
| FT_UInt pixel_width, |
| FT_UInt pixel_height ) |
| { |
| FT_Size_RequestRec req; |
| |
| |
| /* check of `face' delayed to `FT_Request_Size' */ |
| |
| if ( pixel_width == 0 ) |
| pixel_width = pixel_height; |
| else if ( pixel_height == 0 ) |
| pixel_height = pixel_width; |
| |
| if ( pixel_width < 1 ) |
| pixel_width = 1; |
| if ( pixel_height < 1 ) |
| pixel_height = 1; |
| |
| /* use `>=' to avoid potential compiler warning on 16bit platforms */ |
| if ( pixel_width >= 0xFFFFU ) |
| pixel_width = 0xFFFFU; |
| if ( pixel_height >= 0xFFFFU ) |
| pixel_height = 0xFFFFU; |
| |
| req.type = FT_SIZE_REQUEST_TYPE_NOMINAL; |
| req.width = (FT_Long)( pixel_width << 6 ); |
| req.height = (FT_Long)( pixel_height << 6 ); |
| req.horiResolution = 0; |
| req.vertResolution = 0; |
| |
| return FT_Request_Size( face, &req ); |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Get_Kerning( FT_Face face, |
| FT_UInt left_glyph, |
| FT_UInt right_glyph, |
| FT_UInt kern_mode, |
| FT_Vector *akerning ) |
| { |
| FT_Error error = FT_Err_Ok; |
| FT_Driver driver; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( !akerning ) |
| return FT_THROW( Invalid_Argument ); |
| |
| driver = face->driver; |
| |
| akerning->x = 0; |
| akerning->y = 0; |
| |
| if ( driver->clazz->get_kerning ) |
| { |
| error = driver->clazz->get_kerning( face, |
| left_glyph, |
| right_glyph, |
| akerning ); |
| if ( !error ) |
| { |
| if ( kern_mode != FT_KERNING_UNSCALED ) |
| { |
| akerning->x = FT_MulFix( akerning->x, face->size->metrics.x_scale ); |
| akerning->y = FT_MulFix( akerning->y, face->size->metrics.y_scale ); |
| |
| if ( kern_mode != FT_KERNING_UNFITTED ) |
| { |
| /* we scale down kerning values for small ppem values */ |
| /* to avoid that rounding makes them too big. */ |
| /* `25' has been determined heuristically. */ |
| if ( face->size->metrics.x_ppem < 25 ) |
| akerning->x = FT_MulDiv( akerning->x, |
| face->size->metrics.x_ppem, 25 ); |
| if ( face->size->metrics.y_ppem < 25 ) |
| akerning->y = FT_MulDiv( akerning->y, |
| face->size->metrics.y_ppem, 25 ); |
| |
| akerning->x = FT_PIX_ROUND( akerning->x ); |
| akerning->y = FT_PIX_ROUND( akerning->y ); |
| } |
| } |
| } |
| } |
| |
| return error; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Get_Track_Kerning( FT_Face face, |
| FT_Fixed point_size, |
| FT_Int degree, |
| FT_Fixed* akerning ) |
| { |
| FT_Service_Kerning service; |
| FT_Error error = FT_Err_Ok; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( !akerning ) |
| return FT_THROW( Invalid_Argument ); |
| |
| FT_FACE_FIND_SERVICE( face, service, KERNING ); |
| if ( !service ) |
| return FT_THROW( Unimplemented_Feature ); |
| |
| error = service->get_track( face, |
| point_size, |
| degree, |
| akerning ); |
| |
| return error; |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Select_Charmap( FT_Face face, |
| FT_Encoding encoding ) |
| { |
| FT_CharMap* cur; |
| FT_CharMap* limit; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( encoding == FT_ENCODING_NONE ) |
| return FT_THROW( Invalid_Argument ); |
| |
| /* FT_ENCODING_UNICODE is special. We try to find the `best' Unicode */ |
| /* charmap available, i.e., one with UCS-4 characters, if possible. */ |
| /* */ |
| /* This is done by find_unicode_charmap() above, to share code. */ |
| if ( encoding == FT_ENCODING_UNICODE ) |
| return find_unicode_charmap( face ); |
| |
| cur = face->charmaps; |
| if ( !cur ) |
| return FT_THROW( Invalid_CharMap_Handle ); |
| |
| limit = cur + face->num_charmaps; |
| |
| for ( ; cur < limit; cur++ ) |
| { |
| if ( cur[0]->encoding == encoding ) |
| { |
| face->charmap = cur[0]; |
| return 0; |
| } |
| } |
| |
| return FT_THROW( Invalid_Argument ); |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FT_Set_Charmap( FT_Face face, |
| FT_CharMap charmap ) |
| { |
| FT_CharMap* cur; |
| FT_CharMap* limit; |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| cur = face->charmaps; |
| if ( !cur || !charmap ) |
| return FT_THROW( Invalid_CharMap_Handle ); |
| |
| if ( FT_Get_CMap_Format( charmap ) == 14 ) |
| return FT_THROW( Invalid_Argument ); |
| |
| limit = cur + face->num_charmaps; |
| |
| for ( ; cur < limit; cur++ ) |
| { |
| if ( cur[0] == charmap ) |
| { |
| face->charmap = cur[0]; |
| return FT_Err_Ok; |
| } |
| } |
| |
| return FT_THROW( Invalid_Argument ); |
| } |
| |
| |
| /* documentation is in freetype.h */ |
| |
| FT_EXPORT_DEF( FT_Int ) |
| FT_Get_Charmap_Index( FT_CharMap charmap ) |
| { |
| FT_Int i; |
| |
| |
| if ( !charmap || !charmap->face ) |
| return -1; |
| |
| for ( i = 0; i < charmap->face->num_charmaps; i++ ) |
| if ( charmap->face->charmaps[i] == charmap ) |
| break; |
| |
| FT_ASSERT( i < charmap->face->num_charmaps ); |
| |
| return i; |
| } |
| |
| |
| static void |
| ft_cmap_done_internal( FT_CMap cmap ) |
| { |
| FT_CMap_Class clazz = cmap->clazz; |
| FT_Face face = cmap->charmap.face; |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| |
| |
| if ( clazz->done ) |
| clazz->done( cmap ); |
| |
| FT_FREE( cmap ); |
| } |
| |
| |
| FT_BASE_DEF( void ) |
| FT_CMap_Done( FT_CMap cmap ) |
| { |
| if ( cmap ) |
| { |
| FT_Face face = cmap->charmap.face; |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| FT_Error error; |
| FT_Int i, j; |
| |
| |
| for ( i = 0; i < |