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kc3-lang/freetype/src/base/ftobjs.c
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Author :
Antony Lee
Date : 2019-04-06 06:37:42
Hash : 3ad1c93a
Message : Make `glyph_name' parameter to `FT_Get_Name_Index' a `const'. * include/freetype/freetype.h (FT_Get_Name_Index), include/freetype/internal/ftobjs.h (FT_Face_GetGlyphNameIndexFunc), include/freetype/internal/services/svgldict.h (FT_GlyphDict_NameIndexFunc), src/base/ftobjs.c (FT_Get_Name_Index), src/cff/cffdrivr.c (cff_get_name_index), src/sfnt/sfdriver.c (sfnt_get_name_index), src/type1/t1driver.c (t1_get_name_index), src/type42/t42drivr.c (t42_get_name_index): Add `const' to second argument.
- src/base/ftobjs.c
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/**************************************************************************** * * ftobjs.c * * The FreeType private base classes (body). * * Copyright (C) 1996-2019 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_FONT_FORMATS_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_INTERNAL_POSTSCRIPT_AUX_H /* for PS_Driver */ #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 #include FT_DRIVER_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. However, since OpenSSL */ /* also provides the same functions, there might be conflicts if */ /* both FreeType and OpenSSL are built as static libraries. For */ /* this reason, we put the MD5 stuff into the `FT_' namespace. */ #define MD5_u32plus FT_MD5_u32plus #define MD5_CTX FT_MD5_CTX #define MD5_Init FT_MD5_Init #define MD5_Update FT_MD5_Update #define MD5_Final FT_MD5_Final #undef HAVE_OPENSSL #include "md5.c" #if defined( _MSC_VER ) #pragma warning( pop ) #endif static const char* const pixel_modes[] = { "none", "monochrome bitmap", "gray 8-bit bitmap", "gray 2-bit bitmap", "gray 4-bit bitmap", "LCD 8-bit bitmap", "vertical LCD 8-bit bitmap", "BGRA 32-bit color image bitmap" }; #endif /* FT_DEBUG_LEVEL_TRACE */ #define GRID_FIT_METRICS /* forward declaration */ static FT_Error ft_open_face_internal( FT_Library library, const FT_Open_Args* args, FT_Long face_index, FT_Face *aface, FT_Bool test_mac_fonts ); 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 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; } } /* overflow-resistant presetting of bitmap position and dimensions; */ /* also check whether the size is too large for rendering */ FT_BASE_DEF( FT_Bool ) ft_glyphslot_preset_bitmap( FT_GlyphSlot slot, FT_Render_Mode mode, const FT_Vector* origin ) { FT_Outline* outline = &slot->outline; FT_Bitmap* bitmap = &slot->bitmap; FT_Pixel_Mode pixel_mode; FT_BBox cbox, pbox; FT_Pos x_shift = 0; FT_Pos y_shift = 0; FT_Pos x_left, y_top; FT_Pos width, height, pitch; if ( slot->format != FT_GLYPH_FORMAT_OUTLINE ) return 1; if ( origin ) { x_shift = origin->x; y_shift = origin->y; } /* compute the control box, and grid-fit it, */ /* taking into account the origin shift */ FT_Outline_Get_CBox( outline, &cbox ); /* rough estimate of pixel box */ pbox.xMin = ( cbox.xMin >> 6 ) + ( x_shift >> 6 ); pbox.yMin = ( cbox.yMin >> 6 ) + ( y_shift >> 6 ); pbox.xMax = ( cbox.xMax >> 6 ) + ( x_shift >> 6 ); pbox.yMax = ( cbox.yMax >> 6 ) + ( y_shift >> 6 ); /* tiny remainder box */ cbox.xMin = ( cbox.xMin & 63 ) + ( x_shift & 63 ); cbox.yMin = ( cbox.yMin & 63 ) + ( y_shift & 63 ); cbox.xMax = ( cbox.xMax & 63 ) + ( x_shift & 63 ); cbox.yMax = ( cbox.yMax & 63 ) + ( y_shift & 63 ); switch ( mode ) { case FT_RENDER_MODE_MONO: pixel_mode = FT_PIXEL_MODE_MONO; #if 1 /* x */ /* undocumented but confirmed: bbox values get rounded; */ /* we do asymmetric rounding so that the center of a pixel */ /* gets always included */ pbox.xMin += ( cbox.xMin + 31 ) >> 6; pbox.xMax += ( cbox.xMax + 32 ) >> 6; /* if the bbox collapsed, we add a pixel based on the total */ /* rounding remainder to cover most of the original cbox */ if ( pbox.xMin == pbox.xMax ) { if ( ( ( cbox.xMin + 31 ) & 63 ) - 31 + ( ( cbox.xMax + 32 ) & 63 ) - 32 < 0 ) pbox.xMin -= 1; else pbox.xMax += 1; } /* y */ pbox.yMin += ( cbox.yMin + 31 ) >> 6; pbox.yMax += ( cbox.yMax + 32 ) >> 6; if ( pbox.yMin == pbox.yMax ) { if ( ( ( cbox.yMin + 31 ) & 63 ) - 31 + ( ( cbox.yMax + 32 ) & 63 ) - 32 < 0 ) pbox.yMin -= 1; else pbox.yMax += 1; } break; #else goto Adjust; #endif case FT_RENDER_MODE_LCD: pixel_mode = FT_PIXEL_MODE_LCD; ft_lcd_padding( &cbox, slot, mode ); goto Adjust; case FT_RENDER_MODE_LCD_V: pixel_mode = FT_PIXEL_MODE_LCD_V; ft_lcd_padding( &cbox, slot, mode ); goto Adjust; case FT_RENDER_MODE_NORMAL: case FT_RENDER_MODE_LIGHT: default: pixel_mode = FT_PIXEL_MODE_GRAY; Adjust: pbox.xMin += cbox.xMin >> 6; pbox.yMin += cbox.yMin >> 6; pbox.xMax += ( cbox.xMax + 63 ) >> 6; pbox.yMax += ( cbox.yMax + 63 ) >> 6; } x_left = pbox.xMin; y_top = pbox.yMax; width = pbox.xMax - pbox.xMin; height = pbox.yMax - pbox.yMin; switch ( pixel_mode ) { case FT_PIXEL_MODE_MONO: pitch = ( ( width + 15 ) >> 4 ) << 1; break; case FT_PIXEL_MODE_LCD: width *= 3; pitch = FT_PAD_CEIL( width, 4 ); break; case FT_PIXEL_MODE_LCD_V: height *= 3; /* fall through */ case FT_PIXEL_MODE_GRAY: default: pitch = width; } slot->bitmap_left = (FT_Int)x_left; slot->bitmap_top = (FT_Int)y_top; bitmap->pixel_mode = (unsigned char)pixel_mode; bitmap->num_grays = 256; bitmap->width = (unsigned int)width; bitmap->rows = (unsigned int)height; bitmap->pitch = pitch; if ( pbox.xMin < -0x8000 || pbox.xMax > 0x7FFF || pbox.yMin < -0x8000 || pbox.yMax > 0x7FFF ) { FT_TRACE3(( "ft_glyphslot_preset_bitmap: [%ld %ld %ld %ld]\n", pbox.xMin, pbox.yMin, pbox.xMax, pbox.yMax )); return 1; } return 0; } 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 0x%x\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_LONG( metrics->horiBearingY ); right = FT_PIX_CEIL_LONG( ADD_LONG( metrics->vertBearingX, metrics->width ) ); bottom = FT_PIX_CEIL_LONG( ADD_LONG( metrics->vertBearingY, metrics->height ) ); metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); metrics->width = SUB_LONG( right, metrics->vertBearingX ); metrics->height = SUB_LONG( bottom, metrics->vertBearingY ); } else { metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); right = FT_PIX_CEIL_LONG( ADD_LONG( metrics->horiBearingX, metrics->width ) ); bottom = FT_PIX_FLOOR( SUB_LONG( metrics->horiBearingY, metrics->height ) ); metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX ); metrics->horiBearingY = FT_PIX_CEIL_LONG( metrics->horiBearingY ); metrics->width = SUB_LONG( right, metrics->horiBearingX ); metrics->height = SUB_LONG( metrics->horiBearingY, bottom ); } metrics->horiAdvance = FT_PIX_ROUND_LONG( metrics->horiAdvance ); metrics->vertAdvance = FT_PIX_ROUND_LONG( 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; } if ( load_flags & FT_LOAD_BITMAP_METRICS_ONLY ) 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, * - not a tricky font, 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_IS_SCALABLE( face ) && !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 ); FT_Bool is_light_type1; /* only the new Adobe engine (for both CFF and Type 1) is `light'; */ /* we use `strstr' to catch both `Type 1' and `CID Type 1' */ is_light_type1 = ft_strstr( FT_Get_Font_Format( face ), "Type 1" ) != NULL && ((PS_Driver)driver)->hinting_engine == FT_HINTING_ADOBE; /* 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 && ( !FT_DRIVER_HINTS_LIGHTLY( driver ) && !is_light_type1 ) ) || ( 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 ); } } slot->glyph_index = glyph_index; slot->internal->load_flags = load_flags; /* do we need to render the image or preset the bitmap now? */ if ( !error && ( load_flags & FT_LOAD_NO_SCALE ) == 0 && slot->format != FT_GLYPH_FORMAT_BITMAP && slot->format != FT_GLYPH_FORMAT_COMPOSITE ) { 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; if ( load_flags & FT_LOAD_RENDER ) error = FT_Render_Glyph( slot, mode ); else ft_glyphslot_preset_bitmap( slot, mode, NULL ); } #ifdef FT_DEBUG_LEVEL_TRACE FT_TRACE5(( "FT_Load_Glyph: index %d, flags 0x%x\n", glyph_index, load_flags )); FT_TRACE5(( " x advance: %f\n", slot->advance.x / 64.0 )); FT_TRACE5(( " y advance: %f\n", slot->advance.y / 64.0 )); FT_TRACE5(( " linear x advance: %f\n", slot->linearHoriAdvance / 65536.0 )); FT_TRACE5(( " linear y advance: %f\n", slot->linearVertAdvance / 65536.0 )); FT_TRACE5(( " bitmap %dx%d, %s (mode %d)\n", slot->bitmap.width, slot->bitmap.rows, pixel_modes[slot->bitmap.pixel_mode], slot->bitmap.pixel_mode )); #endif 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 face->internal->random_seed = -1; 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_internal( library, &args, face_index, aface, 1 ); } #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_internal( library, &args, face_index, aface, 1 ); } #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, the 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 &= 0x7FFF0000L; /* retain GX data */ #endif error = ft_open_face_internal( library, &args, face_index, aface, 0 ); if ( !error ) (*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 unconditionally, 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 ); /* ignore GX stuff */ if ( face_index > 0 ) face_index &= 0xFFFFL; pos = FT_STREAM_POS(); error = ft_lookup_PS_in_sfnt_stream( stream, face_index, &offset, &length, &is_sfnt_cid ); if ( error ) goto Exit; if ( offset > stream->size ) { FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table offset\n" )); error = FT_THROW( Invalid_Table ); goto Exit; } else if ( length > stream->size - offset ) { FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table length\n" )); error = FT_THROW( Invalid_Table ); goto Exit; } error = FT_Stream_Seek( stream, pos + offset ); if ( error ) goto Exit; if ( FT_ALLOC( sfnt_ps, (FT_Long)length ) ) goto Exit; error = FT_Stream_Read( stream, (FT_Byte *)sfnt_ps, length ); if ( error ) { FT_FREE( sfnt_ps ); 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 ) ) /* actually LONG */ 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" " total pfb_len=0x%08x\n", i, temp, pfb_len + temp + 6 )); if ( FT_MAC_RFORK_MAX_LEN < temp || FT_MAC_RFORK_MAX_LEN - temp < pfb_len + 6 ) { FT_TRACE2(( " MacOS resource length cannot exceed" " 0x%08x\n", FT_MAC_RFORK_MAX_LEN )); 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" " %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" " %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" " %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 ( FT_ERR_EQ( error, Array_Too_Large ) ) FT_TRACE2(( " Abort due to too-short buffer to store" " all POST fragments\n" )); else if ( FT_ERR_EQ( error, 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 to 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 < 0 ) face_index = -face_index - 1; 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 ); if ( (FT_ULong)rlen > FT_MAC_RFORK_MAX_LEN ) return FT_THROW( Invalid_Offset ); 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() */ error = FT_Stream_Seek( stream, flag_offset + 4 ); if ( error ) goto Exit; if ( FT_ALLOC( sfnt_data, rlen ) ) return error; error = FT_Stream_Read( stream, (FT_Byte *)sfnt_data, (FT_ULong)rlen ); if ( error ) { FT_FREE( sfnt_data ); 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, rdata_pos; FT_Long *data_offsets; FT_Long count; error = FT_Raccess_Get_HeaderInfo( library, stream, resource_offset, &map_offset, &rdata_pos ); if ( error ) return error; /* POST resources must be sorted to concatenate properly */ error = FT_Raccess_Get_DataOffsets( library, stream, map_offset, rdata_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, rdata_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 ( !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 || header[0x53] > 0x7F ) 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 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 0x%x 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 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 raccess #ifdef FT_DEBUG_LEVEL_TRACE FT_TRACE3(( "Try as dfont: " )); if ( !( args->flags & FT_OPEN_MEMORY ) ) FT_TRACE3(( "%s ...", args->pathname )); #endif error = IsMacResource( library, stream, 0, face_index, aface ); FT_TRACE3(( "%s\n", error ? "failed" : "successful" )); #undef FT_COMPONENT #define FT_COMPONENT 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 ) { return ft_open_face_internal( library, args, face_index, aface, 1 ); } static FT_Error ft_open_face_internal( FT_Library library, const FT_Open_Args* args, FT_Long face_index, FT_Face *aface, FT_Bool test_mac_fonts ) { 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; #ifndef FT_CONFIG_OPTION_MAC_FONTS FT_UNUSED( test_mac_fonts ); #endif #ifdef FT_DEBUG_LEVEL_TRACE FT_TRACE3(( "FT_Open_Face: " )); if ( face_index < 0 ) FT_TRACE3(( "Requesting number of faces and named instances\n")); else { FT_TRACE3(( "Requesting face %ld", face_index & 0xFFFFL )); if ( face_index & 0x7FFF0000L ) FT_TRACE3(( ", named instance %ld", face_index >> 16 )); FT_TRACE3(( "\n" )); } #endif /* 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 ( test_mac_fonts && ft_strcmp( cur[0]->clazz->module_name, "truetype" ) == 0 && FT_ERR_EQ( error, Table_Missing ) ) { /* TrueType but essential tables are missing */ error = FT_Stream_Seek( stream, 0 ); if ( error ) 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 ) if ( test_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 = -bsize->height; if ( bsize->x_ppem < 0 ) bsize->x_ppem = -bsize->x_ppem; if ( bsize->y_ppem < 0 ) bsize->y_ppem = -bsize->y_ppem; /* check whether negation actually has worked */ if ( bsize->height < 0 || bsize->x_ppem < 0 || bsize->y_ppem < 0 ) { FT_TRACE0(( "FT_Open_Face:" " Invalid bitmap dimensions for strike %d," " now disabled\n", i )); bsize->width = 0; bsize->height = 0; bsize->size = 0; bsize->x_ppem = 0; bsize->y_ppem = 0; } } } /* 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; internal->no_stem_darkening = -1; #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING /* Per-face filtering can only be set up by FT_Face_Properties */ internal->lcd_filter_func = NULL; #endif } 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: #ifdef FT_DEBUG_LEVEL_TRACE if ( !error && face_index < 0 ) { FT_TRACE3(( "FT_Open_Face: The font has %ld face%s\n" " and %ld named instance%s for face %ld\n", face->num_faces, face->num_faces == 1 ? "" : "s", face->style_flags >> 16, ( face->style_flags >> 16 ) == 1 ? "" : "s", -face_index - 1 )); } #endif FT_TRACE4(( "FT_Open_Face: Return 0x%x\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; FT_Size_Internal internal = 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; if ( FT_NEW( internal ) ) goto Exit; size->internal = internal; 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 ); if ( !w || !h ) return FT_THROW( Invalid_Pixel_Size ); 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; } } FT_TRACE3(( "FT_Match_Size: no matching bitmap strike\n" )); 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_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; } } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Select_Size( FT_Face face, FT_Int strike_index ) { FT_Error error = FT_Err_Ok; 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 ) { error = clazz->select_size( face->size, (FT_ULong)strike_index ); FT_TRACE5(( "FT_Select_Size (%s driver):\n", face->driver->root.clazz->module_name )); } else { FT_Select_Metrics( face, (FT_ULong)strike_index ); FT_TRACE5(( "FT_Select_Size:\n" )); } #ifdef FT_DEBUG_LEVEL_TRACE { FT_Size_Metrics* metrics = &face->size->metrics; 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; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Request_Size( FT_Face face, FT_Size_Request req ) { FT_Error error = FT_Err_Ok; 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 ); /* signal the auto-hinter to recompute its size metrics */ /* (if requested) */ face->size->internal->autohint_metrics.x_scale = 0; clazz = face->driver->clazz; if ( clazz->request_size ) { error = clazz->request_size( face->size, req ); FT_TRACE5(( "FT_Request_Size (%s driver):\n", face->driver->root.clazz->module_name )); } else if ( !FT_IS_SCALABLE( face ) && FT_HAS_FIXED_SIZES( face ) ) { /* * 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. */ error = FT_Match_Size( face, req, 0, &strike_index ); if ( error ) return error; return FT_Select_Size( face, (FT_Int)strike_index ); } else { FT_Request_Metrics( face, req ); FT_TRACE5(( "FT_Request_Size:\n" )); } #ifdef FT_DEBUG_LEVEL_TRACE { FT_Size_Metrics* metrics = &face->size->metrics; 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; } /* 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 ) { FT_Pos orig_x = akerning->x; FT_Pos orig_y = akerning->y; /* 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( orig_x, face->size->metrics.x_ppem, 25 ); if ( face->size->metrics.y_ppem < 25 ) akerning->y = FT_MulDiv( orig_y, face->size->metrics.y_ppem, 25 ); akerning->x = FT_PIX_ROUND( akerning->x ); akerning->y = FT_PIX_ROUND( akerning->y ); #ifdef FT_DEBUG_LEVEL_TRACE { FT_Pos orig_x_rounded = FT_PIX_ROUND( orig_x ); FT_Pos orig_y_rounded = FT_PIX_ROUND( orig_y ); if ( akerning->x != orig_x_rounded || akerning->y != orig_y_rounded ) FT_TRACE5(( "FT_Get_Kerning: horizontal kerning" " (%d, %d) scaled down to (%d, %d) pixels\n", orig_x_rounded / 64, orig_y_rounded / 64, akerning->x / 64, akerning->y / 64 )); } #endif } } } } 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 ); /* FT_ENCODING_NONE is a valid encoding for BDF, PCF, and Windows FNT */ if ( encoding == FT_ENCODING_NONE && !face->num_charmaps ) 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 FT_Err_Ok; } } 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 ); limit = cur + face->num_charmaps; for ( ; cur < limit; cur++ ) { if ( cur[0] == charmap && FT_Get_CMap_Format ( charmap ) != 14 ) { 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 < face->num_charmaps; i++ ) { if ( (FT_CMap)face->charmaps[i] == cmap ) { FT_CharMap last_charmap = face->charmaps[face->num_charmaps - 1]; if ( FT_RENEW_ARRAY( face->charmaps, face->num_charmaps, face->num_charmaps - 1 ) ) return; /* remove it from our list of charmaps */ for ( j = i + 1; j < face->num_charmaps; j++ ) { if ( j == face->num_charmaps - 1 ) face->charmaps[j - 1] = last_charmap; else face->charmaps[j - 1] = face->charmaps[j]; } face->num_charmaps--; if ( (FT_CMap)face->charmap == cmap ) face->charmap = NULL; ft_cmap_done_internal( cmap ); break; } } } } FT_BASE_DEF( FT_Error ) FT_CMap_New( FT_CMap_Class clazz, FT_Pointer init_data, FT_CharMap charmap, FT_CMap *acmap ) { FT_Error error = FT_Err_Ok; FT_Face face; FT_Memory memory; FT_CMap cmap = NULL; if ( !clazz || !charmap || !charmap->face ) return FT_THROW( Invalid_Argument ); face = charmap->face; memory = FT_FACE_MEMORY( face ); if ( !FT_ALLOC( cmap, clazz->size ) ) { cmap->charmap = *charmap; cmap->clazz = clazz; if ( clazz->init ) { error = clazz->init( cmap, init_data ); if ( error ) goto Fail; } /* add it to our list of charmaps */ if ( FT_RENEW_ARRAY( face->charmaps, face->num_charmaps, face->num_charmaps + 1 ) ) goto Fail; face->charmaps[face->num_charmaps++] = (FT_CharMap)cmap; } Exit: if ( acmap ) *acmap = cmap; return error; Fail: ft_cmap_done_internal( cmap ); cmap = NULL; goto Exit; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_UInt ) FT_Get_Char_Index( FT_Face face, FT_ULong charcode ) { FT_UInt result = 0; if ( face && face->charmap ) { FT_CMap cmap = FT_CMAP( face->charmap ); if ( charcode > 0xFFFFFFFFUL ) { FT_TRACE1(( "FT_Get_Char_Index: too large charcode" )); FT_TRACE1(( " 0x%x is truncated\n", charcode )); } result = cmap->clazz->char_index( cmap, (FT_UInt32)charcode ); if ( result >= (FT_UInt)face->num_glyphs ) result = 0; } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_ULong ) FT_Get_First_Char( FT_Face face, FT_UInt *agindex ) { FT_ULong result = 0; FT_UInt gindex = 0; /* only do something if we have a charmap, and we have glyphs at all */ if ( face && face->charmap && face->num_glyphs ) { gindex = FT_Get_Char_Index( face, 0 ); if ( gindex == 0 ) result = FT_Get_Next_Char( face, 0, &gindex ); } if ( agindex ) *agindex = gindex; return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_ULong ) FT_Get_Next_Char( FT_Face face, FT_ULong charcode, FT_UInt *agindex ) { FT_ULong result = 0; FT_UInt gindex = 0; if ( face && face->charmap && face->num_glyphs ) { FT_UInt32 code = (FT_UInt32)charcode; FT_CMap cmap = FT_CMAP( face->charmap ); do { gindex = cmap->clazz->char_next( cmap, &code ); } while ( gindex >= (FT_UInt)face->num_glyphs ); result = ( gindex == 0 ) ? 0 : code; } if ( agindex ) *agindex = gindex; return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Face_Properties( FT_Face face, FT_UInt num_properties, FT_Parameter* properties ) { FT_Error error = FT_Err_Ok; if ( num_properties > 0 && !properties ) { error = FT_THROW( Invalid_Argument ); goto Exit; } for ( ; num_properties > 0; num_properties-- ) { if ( properties->tag == FT_PARAM_TAG_STEM_DARKENING ) { if ( properties->data ) { if ( *( (FT_Bool*)properties->data ) == TRUE ) face->internal->no_stem_darkening = FALSE; else face->internal->no_stem_darkening = TRUE; } else { /* use module default */ face->internal->no_stem_darkening = -1; } } else if ( properties->tag == FT_PARAM_TAG_LCD_FILTER_WEIGHTS ) { #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING if ( properties->data ) { ft_memcpy( face->internal->lcd_weights, properties->data, FT_LCD_FILTER_FIVE_TAPS ); face->internal->lcd_filter_func = ft_lcd_filter_fir; } #else error = FT_THROW( Unimplemented_Feature ); goto Exit; #endif } else if ( properties->tag == FT_PARAM_TAG_RANDOM_SEED ) { if ( properties->data ) { face->internal->random_seed = *( (FT_Int32*)properties->data ); if ( face->internal->random_seed < 0 ) face->internal->random_seed = 0; } else { /* use module default */ face->internal->random_seed = -1; } } else { error = FT_THROW( Invalid_Argument ); goto Exit; } if ( error ) break; properties++; } Exit: return error; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_UInt ) FT_Face_GetCharVariantIndex( FT_Face face, FT_ULong charcode, FT_ULong variantSelector ) { FT_UInt result = 0; if ( face && face->charmap && face->charmap->encoding == FT_ENCODING_UNICODE ) { FT_CharMap charmap = find_variant_selector_charmap( face ); FT_CMap ucmap = FT_CMAP( face->charmap ); if ( charmap ) { FT_CMap vcmap = FT_CMAP( charmap ); if ( charcode > 0xFFFFFFFFUL ) { FT_TRACE1(( "FT_Face_GetCharVariantIndex:" " too large charcode" )); FT_TRACE1(( " 0x%x is truncated\n", charcode )); } if ( variantSelector > 0xFFFFFFFFUL ) { FT_TRACE1(( "FT_Face_GetCharVariantIndex:" " too large variantSelector" )); FT_TRACE1(( " 0x%x is truncated\n", variantSelector )); } result = vcmap->clazz->char_var_index( vcmap, ucmap, (FT_UInt32)charcode, (FT_UInt32)variantSelector ); } } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Int ) FT_Face_GetCharVariantIsDefault( FT_Face face, FT_ULong charcode, FT_ULong variantSelector ) { FT_Int result = -1; if ( face ) { FT_CharMap charmap = find_variant_selector_charmap( face ); if ( charmap ) { FT_CMap vcmap = FT_CMAP( charmap ); if ( charcode > 0xFFFFFFFFUL ) { FT_TRACE1(( "FT_Face_GetCharVariantIsDefault:" " too large charcode" )); FT_TRACE1(( " 0x%x is truncated\n", charcode )); } if ( variantSelector > 0xFFFFFFFFUL ) { FT_TRACE1(( "FT_Face_GetCharVariantIsDefault:" " too large variantSelector" )); FT_TRACE1(( " 0x%x is truncated\n", variantSelector )); } result = vcmap->clazz->char_var_default( vcmap, (FT_UInt32)charcode, (FT_UInt32)variantSelector ); } } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_UInt32* ) FT_Face_GetVariantSelectors( FT_Face face ) { FT_UInt32 *result = NULL; if ( face ) { FT_CharMap charmap = find_variant_selector_charmap( face ); if ( charmap ) { FT_CMap vcmap = FT_CMAP( charmap ); FT_Memory memory = FT_FACE_MEMORY( face ); result = vcmap->clazz->variant_list( vcmap, memory ); } } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_UInt32* ) FT_Face_GetVariantsOfChar( FT_Face face, FT_ULong charcode ) { FT_UInt32 *result = NULL; if ( face ) { FT_CharMap charmap = find_variant_selector_charmap( face ); if ( charmap ) { FT_CMap vcmap = FT_CMAP( charmap ); FT_Memory memory = FT_FACE_MEMORY( face ); if ( charcode > 0xFFFFFFFFUL ) { FT_TRACE1(( "FT_Face_GetVariantsOfChar: too large charcode" )); FT_TRACE1(( " 0x%x is truncated\n", charcode )); } result = vcmap->clazz->charvariant_list( vcmap, memory, (FT_UInt32)charcode ); } } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_UInt32* ) FT_Face_GetCharsOfVariant( FT_Face face, FT_ULong variantSelector ) { FT_UInt32 *result = NULL; if ( face ) { FT_CharMap charmap = find_variant_selector_charmap( face ); if ( charmap ) { FT_CMap vcmap = FT_CMAP( charmap ); FT_Memory memory = FT_FACE_MEMORY( face ); if ( variantSelector > 0xFFFFFFFFUL ) { FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" )); FT_TRACE1(( " 0x%x is truncated\n", variantSelector )); } result = vcmap->clazz->variantchar_list( vcmap, memory, (FT_UInt32)variantSelector ); } } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_UInt ) FT_Get_Name_Index( FT_Face face, const FT_String* glyph_name ) { FT_UInt result = 0; if ( face && FT_HAS_GLYPH_NAMES( face ) && glyph_name ) { FT_Service_GlyphDict service; FT_FACE_LOOKUP_SERVICE( face, service, GLYPH_DICT ); if ( service && service->name_index ) result = service->name_index( face, glyph_name ); } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Get_Glyph_Name( FT_Face face, FT_UInt glyph_index, FT_Pointer buffer, FT_UInt buffer_max ) { FT_Error error; FT_Service_GlyphDict service; if ( !face ) return FT_THROW( Invalid_Face_Handle ); if ( !buffer || buffer_max == 0 ) return FT_THROW( Invalid_Argument ); /* clean up buffer */ ((FT_Byte*)buffer)[0] = '\0'; if ( (FT_Long)glyph_index >= face->num_glyphs ) return FT_THROW( Invalid_Glyph_Index ); if ( !FT_HAS_GLYPH_NAMES( face ) ) return FT_THROW( Invalid_Argument ); FT_FACE_LOOKUP_SERVICE( face, service, GLYPH_DICT ); if ( service && service->get_name ) error = service->get_name( face, glyph_index, buffer, buffer_max ); else error = FT_THROW( Invalid_Argument ); return error; } /* documentation is in freetype.h */ FT_EXPORT_DEF( const char* ) FT_Get_Postscript_Name( FT_Face face ) { const char* result = NULL; if ( !face ) goto Exit; if ( !result ) { FT_Service_PsFontName service; FT_FACE_LOOKUP_SERVICE( face, service, POSTSCRIPT_FONT_NAME ); if ( service && service->get_ps_font_name ) result = service->get_ps_font_name( face ); } Exit: return result; } /* documentation is in tttables.h */ FT_EXPORT_DEF( void* ) FT_Get_Sfnt_Table( FT_Face face, FT_Sfnt_Tag tag ) { void* table = NULL; FT_Service_SFNT_Table service; if ( face && FT_IS_SFNT( face ) ) { FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); if ( service ) table = service->get_table( face, tag ); } return table; } /* documentation is in tttables.h */ FT_EXPORT_DEF( FT_Error ) FT_Load_Sfnt_Table( FT_Face face, FT_ULong tag, FT_Long offset, FT_Byte* buffer, FT_ULong* length ) { FT_Service_SFNT_Table service; if ( !face || !FT_IS_SFNT( face ) ) return FT_THROW( Invalid_Face_Handle ); FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); if ( !service ) return FT_THROW( Unimplemented_Feature ); return service->load_table( face, tag, offset, buffer, length ); } /* documentation is in tttables.h */ FT_EXPORT_DEF( FT_Error ) FT_Sfnt_Table_Info( FT_Face face, FT_UInt table_index, FT_ULong *tag, FT_ULong *length ) { FT_Service_SFNT_Table service; FT_ULong offset; /* test for valid `length' delayed to `service->table_info' */ if ( !face || !FT_IS_SFNT( face ) ) return FT_THROW( Invalid_Face_Handle ); FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); if ( !service ) return FT_THROW( Unimplemented_Feature ); return service->table_info( face, table_index, tag, &offset, length ); } /* documentation is in tttables.h */ FT_EXPORT_DEF( FT_ULong ) FT_Get_CMap_Language_ID( FT_CharMap charmap ) { FT_Service_TTCMaps service; FT_Face face; TT_CMapInfo cmap_info; if ( !charmap || !charmap->face ) return 0; face = charmap->face; FT_FACE_FIND_SERVICE( face, service, TT_CMAP ); if ( !service ) return 0; if ( service->get_cmap_info( charmap, &cmap_info )) return 0; return cmap_info.language; } /* documentation is in tttables.h */ FT_EXPORT_DEF( FT_Long ) FT_Get_CMap_Format( FT_CharMap charmap ) { FT_Service_TTCMaps service; FT_Face face; TT_CMapInfo cmap_info; if ( !charmap || !charmap->face ) return -1; face = charmap->face; FT_FACE_FIND_SERVICE( face, service, TT_CMAP ); if ( !service ) return -1; if ( service->get_cmap_info( charmap, &cmap_info )) return -1; return cmap_info.format; } /* documentation is in ftsizes.h */ FT_EXPORT_DEF( FT_Error ) FT_Activate_Size( FT_Size size ) { FT_Face face; if ( !size ) return FT_THROW( Invalid_Size_Handle ); face = size->face; if ( !face || !face->driver ) return FT_THROW( Invalid_Face_Handle ); /* we don't need anything more complex than that; all size objects */ /* are already listed by the face */ face->size = size; return FT_Err_Ok; } /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** R E N D E R E R S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* lookup a renderer by glyph format in the library's list */ FT_BASE_DEF( FT_Renderer ) FT_Lookup_Renderer( FT_Library library, FT_Glyph_Format format, FT_ListNode* node ) { FT_ListNode cur; FT_Renderer result = NULL; if ( !library ) goto Exit; cur = library->renderers.head; if ( node ) { if ( *node ) cur = (*node)->next; *node = NULL; } while ( cur ) { FT_Renderer renderer = FT_RENDERER( cur->data ); if ( renderer->glyph_format == format ) { if ( node ) *node = cur; result = renderer; break; } cur = cur->next; } Exit: return result; } static FT_Renderer ft_lookup_glyph_renderer( FT_GlyphSlot slot ) { FT_Face face = slot->face; FT_Library library = FT_FACE_LIBRARY( face ); FT_Renderer result = library->cur_renderer; if ( !result || result->glyph_format != slot->format ) result = FT_Lookup_Renderer( library, slot->format, 0 ); return result; } static void ft_set_current_renderer( FT_Library library ) { FT_Renderer renderer; renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE, 0 ); library->cur_renderer = renderer; } static FT_Error ft_add_renderer( FT_Module module ) { FT_Library library = module->library; FT_Memory memory = library->memory; FT_Error error; FT_ListNode node = NULL; if ( FT_NEW( node ) ) goto Exit; { FT_Renderer render = FT_RENDERER( module ); FT_Renderer_Class* clazz = (FT_Renderer_Class*)module->clazz; render->clazz = clazz; render->glyph_format = clazz->glyph_format; /* allocate raster object if needed */ if ( clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE && clazz->raster_class->raster_new ) { error = clazz->raster_class->raster_new( memory, &render->raster ); if ( error ) goto Fail; render->raster_render = clazz->raster_class->raster_render; render->render = clazz->render_glyph; } /* add to list */ node->data = module; FT_List_Add( &library->renderers, node ); ft_set_current_renderer( library ); } Fail: if ( error ) FT_FREE( node ); Exit: return error; } static void ft_remove_renderer( FT_Module module ) { FT_Library library; FT_Memory memory; FT_ListNode node; library = module->library; if ( !library ) return; memory = library->memory; node = FT_List_Find( &library->renderers, module ); if ( node ) { FT_Renderer render = FT_RENDERER( module ); /* release raster object, if any */ if ( render->clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE && render->raster ) render->clazz->raster_class->raster_done( render->raster ); /* remove from list */ FT_List_Remove( &library->renderers, node ); FT_FREE( node ); ft_set_current_renderer( library ); } } /* documentation is in ftrender.h */ FT_EXPORT_DEF( FT_Renderer ) FT_Get_Renderer( FT_Library library, FT_Glyph_Format format ) { /* test for valid `library' delayed to `FT_Lookup_Renderer' */ return FT_Lookup_Renderer( library, format, 0 ); } /* documentation is in ftrender.h */ FT_EXPORT_DEF( FT_Error ) FT_Set_Renderer( FT_Library library, FT_Renderer renderer, FT_UInt num_params, FT_Parameter* parameters ) { FT_ListNode node; FT_Error error = FT_Err_Ok; FT_Renderer_SetModeFunc set_mode; if ( !library ) { error = FT_THROW( Invalid_Library_Handle ); goto Exit; } if ( !renderer ) { error = FT_THROW( Invalid_Argument ); goto Exit; } if ( num_params > 0 && !parameters ) { error = FT_THROW( Invalid_Argument ); goto Exit; } node = FT_List_Find( &library->renderers, renderer ); if ( !node ) { error = FT_THROW( Invalid_Argument ); goto Exit; } FT_List_Up( &library->renderers, node ); if ( renderer->glyph_format == FT_GLYPH_FORMAT_OUTLINE ) library->cur_renderer = renderer; set_mode = renderer->clazz->set_mode; for ( ; num_params > 0; num_params-- ) { error = set_mode( renderer, parameters->tag, parameters->data ); if ( error ) break; parameters++; } Exit: return error; } FT_BASE_DEF( FT_Error ) FT_Render_Glyph_Internal( FT_Library library, FT_GlyphSlot slot, FT_Render_Mode render_mode ) { FT_Error error = FT_Err_Ok; FT_Face face = slot->face; FT_Renderer renderer; switch ( slot->format ) { case FT_GLYPH_FORMAT_BITMAP: /* already a bitmap, don't do anything */ break; default: if ( slot->internal->load_flags & FT_LOAD_COLOR ) { FT_LayerIterator iterator; FT_UInt base_glyph = slot->glyph_index; FT_Bool have_layers; FT_UInt glyph_index; FT_UInt color_index; /* check whether we have colored glyph layers */ iterator.p = NULL; have_layers = FT_Get_Color_Glyph_Layer( face, base_glyph, &glyph_index, &color_index, &iterator ); if ( have_layers ) { error = FT_New_GlyphSlot( face, NULL ); if ( !error ) { TT_Face ttface = (TT_Face)face; SFNT_Service sfnt = (SFNT_Service)ttface->sfnt; do { FT_Int32 load_flags = slot->internal->load_flags; /* disable the `FT_LOAD_COLOR' flag to avoid recursion */ /* right here in this function */ load_flags &= ~FT_LOAD_COLOR; /* render into the new `face->glyph' glyph slot */ load_flags |= FT_LOAD_RENDER; error = FT_Load_Glyph( face, glyph_index, load_flags ); if ( error ) break; /* blend new `face->glyph' into old `slot'; */ /* at the first call, `slot' is still empty */ error = sfnt->colr_blend( ttface, color_index, slot, face->glyph ); if ( error ) break; } while ( FT_Get_Color_Glyph_Layer( face, base_glyph, &glyph_index, &color_index, &iterator ) ); if ( !error ) slot->format = FT_GLYPH_FORMAT_BITMAP; /* this call also restores `slot' as the glyph slot */ FT_Done_GlyphSlot( face->glyph ); } if ( !error ) return error; /* Failed to do the colored layer. Draw outline instead. */ slot->format = FT_GLYPH_FORMAT_OUTLINE; } } { FT_ListNode node = NULL; /* small shortcut for the very common case */ if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) { renderer = library->cur_renderer; node = library->renderers.head; } else renderer = FT_Lookup_Renderer( library, slot->format, &node ); error = FT_ERR( Unimplemented_Feature ); while ( renderer ) { error = renderer->render( renderer, slot, render_mode, NULL ); if ( !error || FT_ERR_NEQ( error, Cannot_Render_Glyph ) ) break; /* FT_Err_Cannot_Render_Glyph is returned if the render mode */ /* is unsupported by the current renderer for this glyph image */ /* format. */ /* now, look for another renderer that supports the same */ /* format. */ renderer = FT_Lookup_Renderer( library, slot->format, &node ); } } } #ifdef FT_DEBUG_LEVEL_TRACE #undef FT_COMPONENT #define FT_COMPONENT checksum /* * Computing the MD5 checksum is expensive, unnecessarily distorting a * possible profiling of FreeType if compiled with tracing support. For * this reason, we execute the following code only if explicitly * requested. */ /* we use FT_TRACE3 in this block */ if ( !error && ft_trace_levels[trace_checksum] >= 3 && slot->bitmap.buffer ) { FT_Bitmap bitmap; FT_Error err; FT_Bitmap_Init( &bitmap ); /* we convert to a single bitmap format for computing the checksum */ /* this also converts the bitmap flow to `down' (i.e., pitch > 0) */ err = FT_Bitmap_Convert( library, &slot->bitmap, &bitmap, 1 ); if ( !err ) { MD5_CTX ctx; unsigned char md5[16]; unsigned long coverage = 0; int i, j; int rows = (int)bitmap.rows; int pitch = bitmap.pitch; FT_TRACE3(( "FT_Render_Glyph: bitmap %dx%d, %s (mode %d)\n", pitch, rows, pixel_modes[slot->bitmap.pixel_mode], slot->bitmap.pixel_mode )); for ( i = 0; i < rows; i++ ) for ( j = 0; j < pitch; j++ ) coverage += bitmap.buffer[i * pitch + j]; FT_TRACE3(( " Total coverage: %lu\n", coverage )); MD5_Init( &ctx ); if ( bitmap.buffer ) MD5_Update( &ctx, bitmap.buffer, (unsigned long)rows * (unsigned long)pitch ); MD5_Final( md5, &ctx ); FT_TRACE3(( " MD5 checksum: " )); for ( i = 0; i < 16; i++ ) FT_TRACE3(( "%02X", md5[i] )); FT_TRACE3(( "\n" )); } FT_Bitmap_Done( library, &bitmap ); } /* * Dump bitmap in Netpbm format (PBM or PGM). */ /* we use FT_TRACE7 in this block */ if ( !error && ft_trace_levels[trace_checksum] >= 7 ) { if ( slot->bitmap.rows < 128U && slot->bitmap.width < 128U && slot->bitmap.buffer ) { int rows = (int)slot->bitmap.rows; int width = (int)slot->bitmap.width; int pitch = slot->bitmap.pitch; int i, j, m; unsigned char* topleft = slot->bitmap.buffer; if ( pitch < 0 ) topleft -= pitch * ( rows - 1 ); FT_TRACE7(( "Netpbm image: start\n" )); switch ( slot->bitmap.pixel_mode ) { case FT_PIXEL_MODE_MONO: FT_TRACE7(( "P1 %d %d\n", width, rows )); for ( i = 0; i < rows; i++ ) { for ( j = 0; j < width; ) for ( m = 128; m > 0 && j < width; m >>= 1, j++ ) FT_TRACE7(( " %d", ( topleft[i * pitch + j / 8] & m ) != 0 )); FT_TRACE7(( "\n" )); } break; default: FT_TRACE7(( "P2 %d %d 255\n", width, rows )); for ( i = 0; i < rows; i++ ) { for ( j = 0; j < width; j += 1 ) FT_TRACE7(( " %3u", topleft[i * pitch + j] )); FT_TRACE7(( "\n" )); } } FT_TRACE7(( "Netpbm image: end\n" )); } else FT_TRACE7(( "Netpbm image: too large, omitted\n" )); } #undef FT_COMPONENT #define FT_COMPONENT objs #endif /* FT_DEBUG_LEVEL_TRACE */ return error; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Render_Glyph( FT_GlyphSlot slot, FT_Render_Mode render_mode ) { FT_Library library; if ( !slot || !slot->face ) return FT_THROW( Invalid_Argument ); library = FT_FACE_LIBRARY( slot->face ); return FT_Render_Glyph_Internal( library, slot, render_mode ); } /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** M O D U L E S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /************************************************************************** * * @Function: * Destroy_Module * * @Description: * Destroys a given module object. For drivers, this also destroys * all child faces. * * @InOut: * module :: * A handle to the target driver object. * * @Note: * The driver _must_ be LOCKED! */ static void Destroy_Module( FT_Module module ) { FT_Memory memory = module->memory; FT_Module_Class* clazz = module->clazz; FT_Library library = module->library; if ( library && library->auto_hinter == module ) library->auto_hinter = NULL; /* if the module is a renderer */ if ( FT_MODULE_IS_RENDERER( module ) ) ft_remove_renderer( module ); /* if the module is a font driver, add some steps */ if ( FT_MODULE_IS_DRIVER( module ) ) Destroy_Driver( FT_DRIVER( module ) ); /* finalize the module object */ if ( clazz->module_done ) clazz->module_done( module ); /* discard it */ FT_FREE( module ); } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Error ) FT_Add_Module( FT_Library library, const FT_Module_Class* clazz ) { FT_Error error; FT_Memory memory; FT_Module module = NULL; FT_UInt nn; #define FREETYPE_VER_FIXED ( ( (FT_Long)FREETYPE_MAJOR << 16 ) | \ FREETYPE_MINOR ) if ( !library ) return FT_THROW( Invalid_Library_Handle ); if ( !clazz ) return FT_THROW( Invalid_Argument ); /* check FreeType version */ if ( clazz->module_requires > FREETYPE_VER_FIXED ) return FT_THROW( Invalid_Version ); /* look for a module with the same name in the library's table */ for ( nn = 0; nn < library->num_modules; nn++ ) { module = library->modules[nn]; if ( ft_strcmp( module->clazz->module_name, clazz->module_name ) == 0 ) { /* this installed module has the same name, compare their versions */ if ( clazz->module_version <= module->clazz->module_version ) return FT_THROW( Lower_Module_Version ); /* remove the module from our list, then exit the loop to replace */ /* it by our new version.. */ FT_Remove_Module( library, module ); break; } } memory = library->memory; error = FT_Err_Ok; if ( library->num_modules >= FT_MAX_MODULES ) { error = FT_THROW( Too_Many_Drivers ); goto Exit; } /* allocate module object */ if ( FT_ALLOC( module, clazz->module_size ) ) goto Exit; /* base initialization */ module->library = library; module->memory = memory; module->clazz = (FT_Module_Class*)clazz; /* check whether the module is a renderer - this must be performed */ /* before the normal module initialization */ if ( FT_MODULE_IS_RENDERER( module ) ) { /* add to the renderers list */ error = ft_add_renderer( module ); if ( error ) goto Fail; } /* is the module a auto-hinter? */ if ( FT_MODULE_IS_HINTER( module ) ) library->auto_hinter = module; /* if the module is a font driver */ if ( FT_MODULE_IS_DRIVER( module ) ) { FT_Driver driver = FT_DRIVER( module ); driver->clazz = (FT_Driver_Class)module->clazz; } if ( clazz->module_init ) { error = clazz->module_init( module ); if ( error ) goto Fail; } /* add module to the library's table */ library->modules[library->num_modules++] = module; Exit: return error; Fail: if ( FT_MODULE_IS_RENDERER( module ) ) { FT_Renderer renderer = FT_RENDERER( module ); if ( renderer->clazz && renderer->clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE && renderer->raster ) renderer->clazz->raster_class->raster_done( renderer->raster ); } FT_FREE( module ); goto Exit; } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Module ) FT_Get_Module( FT_Library library, const char* module_name ) { FT_Module result = NULL; FT_Module* cur; FT_Module* limit; if ( !library || !module_name ) return result; cur = library->modules; limit = cur + library->num_modules; for ( ; cur < limit; cur++ ) if ( ft_strcmp( cur[0]->clazz->module_name, module_name ) == 0 ) { result = cur[0]; break; } return result; } /* documentation is in ftobjs.h */ FT_BASE_DEF( const void* ) FT_Get_Module_Interface( FT_Library library, const char* mod_name ) { FT_Module module; /* test for valid `library' delayed to FT_Get_Module() */ module = FT_Get_Module( library, mod_name ); return module ? module->clazz->module_interface : 0; } FT_BASE_DEF( FT_Pointer ) ft_module_get_service( FT_Module module, const char* service_id, FT_Bool global ) { FT_Pointer result = NULL; if ( module ) { FT_ASSERT( module->clazz && module->clazz->get_interface ); /* first, look for the service in the module */ if ( module->clazz->get_interface ) result = module->clazz->get_interface( module, service_id ); if ( global && !result ) { /* we didn't find it, look in all other modules then */ FT_Library library = module->library; FT_Module* cur = library->modules; FT_Module* limit = cur + library->num_modules; for ( ; cur < limit; cur++ ) { if ( cur[0] != module ) { FT_ASSERT( cur[0]->clazz ); if ( cur[0]->clazz->get_interface ) { result = cur[0]->clazz->get_interface( cur[0], service_id ); if ( result ) break; } } } } } return result; } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Error ) FT_Remove_Module( FT_Library library, FT_Module module ) { /* try to find the module from the table, then remove it from there */ if ( !library ) return FT_THROW( Invalid_Library_Handle ); if ( module ) { FT_Module* cur = library->modules; FT_Module* limit = cur + library->num_modules; for ( ; cur < limit; cur++ ) { if ( cur[0] == module ) { /* remove it from the table */ library->num_modules--; limit--; while ( cur < limit ) { cur[0] = cur[1]; cur++; } limit[0] = NULL; /* destroy the module */ Destroy_Module( module ); return FT_Err_Ok; } } } return FT_THROW( Invalid_Driver_Handle ); } static FT_Error ft_property_do( FT_Library library, const FT_String* module_name, const FT_String* property_name, void* value, FT_Bool set, FT_Bool value_is_string ) { FT_Module* cur; FT_Module* limit; FT_Module_Interface interface; FT_Service_Properties service; #ifdef FT_DEBUG_LEVEL_ERROR const FT_String* set_name = "FT_Property_Set"; const FT_String* get_name = "FT_Property_Get"; const FT_String* func_name = set ? set_name : get_name; #endif FT_Bool missing_func; if ( !library ) return FT_THROW( Invalid_Library_Handle ); if ( !module_name || !property_name || !value ) return FT_THROW( Invalid_Argument ); cur = library->modules; limit = cur + library->num_modules; /* search module */ for ( ; cur < limit; cur++ ) if ( !ft_strcmp( cur[0]->clazz->module_name, module_name ) ) break; if ( cur == limit ) { FT_ERROR(( "%s: can't find module `%s'\n", func_name, module_name )); return FT_THROW( Missing_Module ); } /* check whether we have a service interface */ if ( !cur[0]->clazz->get_interface ) { FT_ERROR(( "%s: module `%s' doesn't support properties\n", func_name, module_name )); return FT_THROW( Unimplemented_Feature ); } /* search property service */ interface = cur[0]->clazz->get_interface( cur[0], FT_SERVICE_ID_PROPERTIES ); if ( !interface ) { FT_ERROR(( "%s: module `%s' doesn't support properties\n", func_name, module_name )); return FT_THROW( Unimplemented_Feature ); } service = (FT_Service_Properties)interface; if ( set ) missing_func = FT_BOOL( !service->set_property ); else missing_func = FT_BOOL( !service->get_property ); if ( missing_func ) { FT_ERROR(( "%s: property service of module `%s' is broken\n", func_name, module_name )); return FT_THROW( Unimplemented_Feature ); } return set ? service->set_property( cur[0], property_name, value, value_is_string ) : service->get_property( cur[0], property_name, value ); } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Error ) FT_Property_Set( FT_Library library, const FT_String* module_name, const FT_String* property_name, const void* value ) { return ft_property_do( library, module_name, property_name, (void*)value, TRUE, FALSE ); } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Error ) FT_Property_Get( FT_Library library, const FT_String* module_name, const FT_String* property_name, void* value ) { return ft_property_do( library, module_name, property_name, value, FALSE, FALSE ); } #ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES /* this variant is used for handling the FREETYPE_PROPERTIES */ /* environment variable */ FT_BASE_DEF( FT_Error ) ft_property_string_set( FT_Library library, const FT_String* module_name, const FT_String* property_name, FT_String* value ) { return ft_property_do( library, module_name, property_name, (void*)value, TRUE, TRUE ); } #endif /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** L I B R A R Y ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Error ) FT_Reference_Library( FT_Library library ) { if ( !library ) return FT_THROW( Invalid_Library_Handle ); library->refcount++; return FT_Err_Ok; } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Error ) FT_New_Library( FT_Memory memory, FT_Library *alibrary ) { FT_Library library = NULL; FT_Error error; if ( !memory || !alibrary ) return FT_THROW( Invalid_Argument ); #ifdef FT_DEBUG_LEVEL_ERROR /* init debugging support */ ft_debug_init(); #endif /* first of all, allocate the library object */ if ( FT_NEW( library ) ) return error; library->memory = memory; library->version_major = FREETYPE_MAJOR; library->version_minor = FREETYPE_MINOR; library->version_patch = FREETYPE_PATCH; library->refcount = 1; /* That's ok now */ *alibrary = library; return FT_Err_Ok; } /* documentation is in freetype.h */ FT_EXPORT_DEF( void ) FT_Library_Version( FT_Library library, FT_Int *amajor, FT_Int *aminor, FT_Int *apatch ) { FT_Int major = 0; FT_Int minor = 0; FT_Int patch = 0; if ( library ) { major = library->version_major; minor = library->version_minor; patch = library->version_patch; } if ( amajor ) *amajor = major; if ( aminor ) *aminor = minor; if ( apatch ) *apatch = patch; } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_Error ) FT_Done_Library( FT_Library library ) { FT_Memory memory; if ( !library ) return FT_THROW( Invalid_Library_Handle ); library->refcount--; if ( library->refcount > 0 ) goto Exit; memory = library->memory; /* * Close all faces in the library. If we don't do this, we can have * some subtle memory leaks. * * Example: * * - the cff font driver uses the pshinter module in cff_size_done * - if the pshinter module is destroyed before the cff font driver, * opened FT_Face objects managed by the driver are not properly * destroyed, resulting in a memory leak * * Some faces are dependent on other faces, like Type42 faces that * depend on TrueType faces synthesized internally. * * The order of drivers should be specified in driver_name[]. */ { FT_UInt m, n; const char* driver_name[] = { "type42", NULL }; for ( m = 0; m < sizeof ( driver_name ) / sizeof ( driver_name[0] ); m++ ) { for ( n = 0; n < library->num_modules; n++ ) { FT_Module module = library->modules[n]; const char* module_name = module->clazz->module_name; FT_List faces; if ( driver_name[m] && ft_strcmp( module_name, driver_name[m] ) != 0 ) continue; if ( ( module->clazz->module_flags & FT_MODULE_FONT_DRIVER ) == 0 ) continue; FT_TRACE7(( "FT_Done_Library: close faces for %s\n", module_name )); faces = &FT_DRIVER( module )->faces_list; while ( faces->head ) { FT_Done_Face( FT_FACE( faces->head->data ) ); if ( faces->head ) FT_TRACE0(( "FT_Done_Library: failed to free some faces\n" )); } } } } /* Close all other modules in the library */ #if 1 /* XXX Modules are removed in the reversed order so that */ /* type42 module is removed before truetype module. This */ /* avoids double free in some occasions. It is a hack. */ while ( library->num_modules > 0 ) FT_Remove_Module( library, library->modules[library->num_modules - 1] ); #else { FT_UInt n; for ( n = 0; n < library->num_modules; n++ ) { FT_Module module = library->modules[n]; if ( module ) { Destroy_Module( module ); library->modules[n] = NULL; } } } #endif FT_FREE( library ); Exit: return FT_Err_Ok; } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( void ) FT_Set_Debug_Hook( FT_Library library, FT_UInt hook_index, FT_DebugHook_Func debug_hook ) { if ( library && debug_hook && hook_index < ( sizeof ( library->debug_hooks ) / sizeof ( void* ) ) ) library->debug_hooks[hook_index] = debug_hook; } /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( FT_TrueTypeEngineType ) FT_Get_TrueType_Engine_Type( FT_Library library ) { FT_TrueTypeEngineType result = FT_TRUETYPE_ENGINE_TYPE_NONE; if ( library ) { FT_Module module = FT_Get_Module( library, "truetype" ); if ( module ) { FT_Service_TrueTypeEngine service; service = (FT_Service_TrueTypeEngine) ft_module_get_service( module, FT_SERVICE_ID_TRUETYPE_ENGINE, 0 ); if ( service ) result = service->engine_type; } } return result; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Get_SubGlyph_Info( FT_GlyphSlot glyph, FT_UInt sub_index, FT_Int *p_index, FT_UInt *p_flags, FT_Int *p_arg1, FT_Int *p_arg2, FT_Matrix *p_transform ) { FT_Error error = FT_ERR( Invalid_Argument ); if ( glyph && glyph->subglyphs && glyph->format == FT_GLYPH_FORMAT_COMPOSITE && sub_index < glyph->num_subglyphs ) { FT_SubGlyph subg = glyph->subglyphs + sub_index; *p_index = subg->index; *p_flags = subg->flags; *p_arg1 = subg->arg1; *p_arg2 = subg->arg2; *p_transform = subg->transform; error = FT_Err_Ok; } return error; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Bool ) FT_Get_Color_Glyph_Layer( FT_Face face, FT_UInt base_glyph, FT_UInt *aglyph_index, FT_UInt *acolor_index, FT_LayerIterator* iterator ) { TT_Face ttface; SFNT_Service sfnt; if ( !face || !aglyph_index || !acolor_index || !iterator || base_glyph >= (FT_UInt)face->num_glyphs ) return 0; if ( !FT_IS_SFNT( face ) ) return 0; ttface = (TT_Face)face; sfnt = (SFNT_Service)ttface->sfnt; if ( sfnt->get_colr_layer ) return sfnt->get_colr_layer( ttface, base_glyph, aglyph_index, acolor_index, iterator ); else return 0; } /* END */