/***************************************************************************/ /* */ /* ftobjs.c */ /* */ /* The FreeType private base classes (body). */ /* */ /* Copyright 1996-2018 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_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_GLYPH_DICT_H #include FT_SERVICE_TT_CMAP_H #include FT_DRIVER_H #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( 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_STREAM ) && args->stream ) { /* use an existing, user-provided stream */ /* in this case, we do not need to allocate a new stream object */ /* since the caller is responsible for closing it himself */ FT_FREE( stream ); stream = args->stream; } #endif else error = FT_THROW( Invalid_Argument ); if ( error ) FT_FREE( stream ); else stream->memory = memory; /* just to be certain */ *astream = stream; Exit: return error; } FT_BASE_DEF( void ) FT_Stream_Free( FT_Stream stream, FT_Int external ) { if ( stream ) { FT_Memory memory = stream->memory; FT_Stream_Close( stream ); if ( !external ) FT_FREE( stream ); } } /*************************************************************************/ /* */ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ /* messages during execution. */ /* */ #undef FT_COMPONENT #define FT_COMPONENT trace_objs /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** FACE, SIZE & GLYPH SLOT OBJECTS ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ static FT_Error ft_glyphslot_init( FT_GlyphSlot slot ) { FT_Driver driver = slot->face->driver; FT_Driver_Class clazz = driver->clazz; FT_Memory memory = driver->root.memory; FT_Error error = FT_Err_Ok; FT_Slot_Internal internal = NULL; slot->library = driver->root.library; if ( FT_NEW( internal ) ) goto Exit; slot->internal = internal; if ( FT_DRIVER_USES_OUTLINES( driver ) ) error = FT_GlyphLoader_New( memory, &internal->loader ); if ( !error && clazz->init_slot ) error = clazz->init_slot( slot ); Exit: return error; } FT_BASE_DEF( void ) ft_glyphslot_free_bitmap( FT_GlyphSlot slot ) { if ( slot->internal && ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) ) { FT_Memory memory = FT_FACE_MEMORY( slot->face ); FT_FREE( slot->bitmap.buffer ); slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; } else { /* assume that the bitmap buffer was stolen or not */ /* allocated from the heap */ slot->bitmap.buffer = NULL; } } FT_BASE_DEF( void ) ft_glyphslot_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; FT_Pos x_shift = 0; FT_Pos y_shift = 0; FT_Pos x_left, y_top; FT_Pos width, height, pitch; if ( slot->internal && ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) ) return; 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 ); cbox.xMin += x_shift; cbox.yMin += y_shift; cbox.xMax += x_shift; cbox.yMax += y_shift; switch ( mode ) { case FT_RENDER_MODE_MONO: pixel_mode = FT_PIXEL_MODE_MONO; #if 1 /* undocumented but confirmed: bbox values get rounded */ /* unless the rounded box can collapse for a narrow glyph */ if ( cbox.xMax - cbox.xMin < 64 ) { cbox.xMin = FT_PIX_FLOOR( cbox.xMin ); cbox.xMax = FT_PIX_CEIL_LONG( cbox.xMax ); } else { cbox.xMin = FT_PIX_ROUND_LONG( cbox.xMin ); cbox.xMax = FT_PIX_ROUND_LONG( cbox.xMax ); } if ( cbox.yMax - cbox.yMin < 64 ) { cbox.yMin = FT_PIX_FLOOR( cbox.yMin ); cbox.yMax = FT_PIX_CEIL_LONG( cbox.yMax ); } else { cbox.yMin = FT_PIX_ROUND_LONG( cbox.yMin ); cbox.yMax = FT_PIX_ROUND_LONG( cbox.yMax ); } #else cbox.xMin = FT_PIX_FLOOR( cbox.xMin ); cbox.yMin = FT_PIX_FLOOR( cbox.yMin ); cbox.xMax = FT_PIX_CEIL_LONG( cbox.xMax ); cbox.yMax = FT_PIX_CEIL_LONG( cbox.yMax ); #endif break; case FT_RENDER_MODE_NORMAL: case FT_RENDER_MODE_LIGHT: default: pixel_mode = FT_PIXEL_MODE_GRAY; cbox.xMin = FT_PIX_FLOOR( cbox.xMin ); cbox.yMin = FT_PIX_FLOOR( cbox.yMin ); cbox.xMax = FT_PIX_CEIL_LONG( cbox.xMax ); cbox.yMax = FT_PIX_CEIL_LONG( cbox.yMax ); } x_shift = SUB_LONG( x_shift, cbox.xMin ); y_shift = SUB_LONG( y_shift, cbox.yMin ); x_left = cbox.xMin >> 6; y_top = cbox.yMax >> 6; width = ( (FT_ULong)cbox.xMax - (FT_ULong)cbox.xMin ) >> 6; height = ( (FT_ULong)cbox.yMax - (FT_ULong)cbox.yMin ) >> 6; switch ( pixel_mode ) { case FT_PIXEL_MODE_MONO: pitch = ( ( width + 15 ) >> 4 ) << 1; break; 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; } 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; } #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 format dealing with outlines, * - 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_DRIVER_IS_SCALABLE( driver ) && FT_DRIVER_USES_OUTLINES( driver ) && !FT_IS_TRICKY( face ) && ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) || ( face->internal->transform_matrix.yx == 0 && face->internal->transform_matrix.xx != 0 ) || ( face->internal->transform_matrix.xx == 0 && face->internal->transform_matrix.yx != 0 ) ) ) { if ( ( load_flags & FT_LOAD_FORCE_AUTOHINT ) || !FT_DRIVER_HAS_HINTER( driver ) ) autohint = TRUE; else { FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); 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 ) { 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 ); } } /* 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 ( load_flags & FT_LOAD_RENDER ) error = FT_Render_Glyph( slot, mode ); else ft_glyphslot_preset_bitmap( slot, mode, NULL ); } FT_TRACE5(( "FT_Load_Glyph: index %d, flags %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, mode %d\n", slot->bitmap.width, slot->bitmap.rows, slot->bitmap.pixel_mode )); Exit: return error; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Load_Char( FT_Face face, FT_ULong char_code, FT_Int32 load_flags ) { FT_UInt glyph_index; if ( !face ) return FT_THROW( Invalid_Face_Handle ); glyph_index = (FT_UInt)char_code; if ( face->charmap ) glyph_index = FT_Get_Char_Index( face, char_code ); return FT_Load_Glyph( face, glyph_index, load_flags ); } /* destructor for sizes list */ static void destroy_size( FT_Memory memory, FT_Size size, FT_Driver driver ) { /* finalize client-specific data */ if ( size->generic.finalizer ) size->generic.finalizer( size ); /* finalize format-specific stuff */ if ( driver->clazz->done_size ) driver->clazz->done_size( size ); FT_FREE( size->internal ); FT_FREE( size ); } static void ft_cmap_done_internal( FT_CMap cmap ); static void destroy_charmaps( FT_Face face, FT_Memory memory ) { FT_Int n; if ( !face ) return; for ( n = 0; n < face->num_charmaps; n++ ) { FT_CMap cmap = FT_CMAP( face->charmaps[n] ); ft_cmap_done_internal( cmap ); face->charmaps[n] = NULL; } FT_FREE( face->charmaps ); face->num_charmaps = 0; } /* destructor for faces list */ static void destroy_face( FT_Memory memory, FT_Face face, FT_Driver driver ) { FT_Driver_Class clazz = driver->clazz; /* discard auto-hinting data */ if ( face->autohint.finalizer ) face->autohint.finalizer( face->autohint.data ); /* Discard glyph slots for this face. */ /* Beware! FT_Done_GlyphSlot() changes the field `face->glyph' */ while ( face->glyph ) FT_Done_GlyphSlot( face->glyph ); /* discard all sizes for this face */ FT_List_Finalize( &face->sizes_list, (FT_List_Destructor)destroy_size, memory, driver ); face->size = NULL; /* now discard client data */ if ( face->generic.finalizer ) face->generic.finalizer( face ); /* discard charmaps */ destroy_charmaps( face, memory ); /* finalize format-specific stuff */ if ( clazz->done_face ) clazz->done_face( face ); /* close the stream for this face if needed */ FT_Stream_Free( face->stream, ( face->face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0 ); face->stream = NULL; /* get rid of it */ if ( face->internal ) { FT_FREE( face->internal ); } FT_FREE( face ); } static void Destroy_Driver( FT_Driver driver ) { FT_List_Finalize( &driver->faces_list, (FT_List_Destructor)destroy_face, driver->root.memory, driver ); } /*************************************************************************/ /* */ /* */ /* find_unicode_charmap */ /* */ /* */ /* 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 ); } /*************************************************************************/ /* */ /* */ /* open_face */ /* */ /* */ /* 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; 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; } #ifdef FT_MACINTOSH /* 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 ); } /* 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 */ error = ft_open_face_internal( library, &args, face_index, aface, 0 ); if ( !error ) (*aface)->face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM; else FT_Stream_Free( stream, 0 ); 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; } } #endif /* FT_MACINTOSH */ /* documentation is in freetype.h */ #ifndef FT_MACINTOSH FT_EXPORT_DEF( FT_Error ) FT_New_Face( FT_Library library, const FT_Open_Args* args, FT_Long face_index, FT_Face *aface ) { return FT_Open_Face( library, args, face_index, aface ); } #endif 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; FT_UNUSED( test_mac_fonts ); /* 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; 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; /* 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; } 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_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_Select_Charmap( FT_Face face, FT_Encoding encoding ) { FT_CharMap* cur; FT_CharMap* limit; if ( !face ) return FT_THROW( Invalid_Face_Handle ); if ( encoding == FT_ENCODING_NONE ) return FT_THROW( Invalid_Argument ); /* FT_ENCODING_UNICODE is special. We try to find the `best' Unicode */ /* charmap available, i.e., one with UCS-4 characters, if possible. */ /* */ /* This is done by find_unicode_charmap() above, to share code. */ if ( encoding == FT_ENCODING_UNICODE ) return find_unicode_charmap( face ); cur = face->charmaps; if ( !cur ) return FT_THROW( Invalid_CharMap_Handle ); limit = cur + face->num_charmaps; for ( ; cur < limit; cur++ ) { if ( cur[0]->encoding == encoding ) { face->charmap = cur[0]; return 0; } } return FT_THROW( Invalid_Argument ); } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Set_Charmap( FT_Face face, FT_CharMap charmap ) { FT_CharMap* cur; FT_CharMap* limit; if ( !face ) return FT_THROW( Invalid_Face_Handle ); cur = face->charmaps; if ( !cur || !charmap ) return FT_THROW( Invalid_CharMap_Handle ); if ( FT_Get_CMap_Format( charmap ) == 14 ) return FT_THROW( Invalid_Argument ); limit = cur + face->num_charmaps; for ( ; cur < limit; cur++ ) { if ( cur[0] == charmap ) { face->charmap = cur[0]; return FT_Err_Ok; } } return FT_THROW( Invalid_Argument ); } 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_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 { error = FT_THROW( Invalid_Argument ); goto Exit; } if ( error ) break; properties++; } Exit: return error; } /* 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 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 ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ static void ft_add_renderer( FT_Module module ) { FT_Library library = module->library; FT_Renderer render = FT_RENDERER( module ); FT_Renderer_Class* clazz = (FT_Renderer_Class*)module->clazz; render->clazz = clazz; render->raster_render = clazz->raster_class->raster_render; render->render = clazz->render_glyph; library->cur_renderer = render; } 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_Renderer renderer; /* if it is already a bitmap, no need to do anything */ switch ( slot->format ) { case FT_GLYPH_FORMAT_BITMAP: /* already a bitmap, don't do anything */ break; case FT_GLYPH_FORMAT_OUTLINE: /* small shortcut for the very common case */ renderer = library->cur_renderer; /* NOTE: Multiple renderer support removed */ error = renderer->render( renderer, slot, render_mode, NULL ); break; default: error = FT_ERR( Unimplemented_Feature ); } 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 ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* */ /* Destroy_Module */ /* */ /* */ /* Destroys a given module object. For drivers, this also destroys */ /* all child faces. */ /* */ /* */ /* module :: A handle to the target driver object. */ /* */ /* */ /* 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 ( library && FT_MODULE_IS_RENDERER( module ) ) library->cur_renderer = NULL; /* 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; 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 */ ft_add_renderer( module ); } /* 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: 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 ); } /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** L I B R A R Y ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* 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 ); /* first of all, allocate the library object */ if ( FT_NEW( library ) ) return error; library->memory = memory; library->refcount = 1; /* That's ok now */ *alibrary = library; return FT_Err_Ok; } /* 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; } /* END */