kc3-lang/freetype/src/oldapi/ttapi.c
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Hash : efce08d6
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Date : 2000-05-11T18:23:52
major re-organisation of the FreeType 2 directory hierarchy
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src/oldapi/ttapi.c
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/******************************************************************* * * ttapi.c * * High-level interface implementation * * Copyright 1996-1998 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. * * Notes: * * This file is used to implement most of the functions that are * defined in the file "freetype.h". However, two functions are * implemented elsewhere : * ******************************************************************/ #include <freetype/freetype.h> #include <freetype/internal/ftdebug.h> #include <freetype/internal/ftstream.h> #include <freetype/internal/ftcalc.h> #include <freetype/internal/ftlist.h> #include <freetype/internal/ftraster.h> #include <../truetype/ttdriver.h> #include <../truetype/ttobjs.h> #include <../truetype/ttcmap.h> #define _TRUETYPE_ #include <truetype.h> /* backwards compatible interface */ /* required by the tracing mode */ #undef FT_COMPONENT #define FT_COMPONENT trace_ttapi #define RENDER_POOL_SIZE 64000 static const FT_DriverInterface* tt_interface = &tt_driver_interface; static const TT_DriverInterface* tt_extension = &tt_format_interface; /***********************************************************************/ /* */ /* <Function> TT_Init_FreeType */ /* */ /* <Description> */ /* Creates a new TrueType driver/engine object. */ /* */ /* <Output> */ /* engine :: handle to the new engine object */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* This function is provided for stand-alone compiles of the */ /* TrueType driver. */ /* */ EXPORT_FUNC TT_Error TT_Init_FreeType( TT_Engine* engine ) { FT_Library library; FT_System system; TT_Error error; *engine = 0; error = FT_New_System( &system ); if (error) return error; error = FT_New_Library( system, &library ); if (!error) /* Now create a new TrueType driver object */ error = FT_Add_Driver( library, (FT_DriverInterface*)&tt_driver_interface ); if (error) FT_Done_Library(library); else *engine = (TT_Engine)library; return error; } /***********************************************************************/ /* */ /* <Function> TT_Done_FreeType */ /* */ /* <Description> */ /* Destroys a given TrueType engine object created with */ /* TT_Init_FreeType. All associated objects, (i.e. faces, outlines */ /* and charmaps) will be destroyed.. */ /* */ /* <Input> */ /* engine :: handle to the engine object */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* This function is provided for stand-alone compiles of the */ /* TrueType driver. The FreeType library uses the TT_Done_Engine */ /* API. */ /* */ EXPORT_FUNC TT_Error TT_Done_FreeType( TT_Engine engine ) { FT_Library library = (FT_Library)engine; FT_Done_FreeType( library ); return FT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> TT_Set_Raster_Gray_Palette */ /* */ /* <Description> */ /* Sets the raster's gray 5-levels palette. Entry 0 correspond to */ /* the background, Entry 4 to the foreground. Intermediate entries */ /* correspond to gray levels.. */ /* */ /* <Input> */ /* engine :: handle to the engine object */ /* palette :: an array of 5 bytes used to render 8-bit pixmaps */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* This function is provided for stand-alone compiles of the */ /* TrueType driver. The FreeType library accesses directly the */ /* raster object to set the palette. */ /* */ /* This function ONLY supports 5 levels of grays. */ /* */ EXPORT_FUNC TT_Error TT_Set_Raster_Gray_Palette( TT_Engine engine, const TT_Byte* palette ) { FT_Library library; if (!engine) return TT_Err_Invalid_Engine; library = (FT_Library)engine; return FT_Set_Raster_Palette( library, 5, (unsigned char*)palette ); } /***********************************************************************/ /* */ /* <Function> TT_Open_Face */ /* */ /* <Description> */ /* Creates a new face object from a given resource. The file can */ /* be either a TrueType file (ttf) or a TrueType collection (ttc). */ /* In the latter case, only the first face is opened. The number */ /* of faces in a collection can be obtained in the face's */ /* properties field "num_Faces". Other faces can be opened with */ /* TT_Open_Collection (see below). */ /* */ /* <Input> */ /* engine :: the parent engine object where to create the face */ /* object. */ /* */ /* pathname :: pathname for the font file. */ /* */ /* <Output> */ /* face :: a handle to the fresh face object. */ /* */ /* <Return> */ /* TrueType error code. 0 means success.. */ /* */ /* <MT-Note> */ /* Yes. */ /* */ /* <Note> */ /* This API is provided fro backwards compatibility. Please use */ /* the functions TT_New_Face/TT_Done_Face now to create and */ /* discard face objects.. */ /* */ static TT_Error open_face( FT_Library library, const TT_Text* pathname, TT_Int face_index, TT_Face *aface ) { TT_Error error; FT_Resource resource; *aface = 0; error = FT_New_Resource( library, pathname, &resource ); if (error) return error; #if 0 error = FT_Add_Resource( library, resource ); if (error) goto Fail_Install; #endif error = FT_New_Face( resource, face_index, (FT_Face*)aface ); /* Destroy glyph slot to comply with the 1.x API */ if (!error) FT_Done_GlyphSlot( (*aface)->root.slot ); if (error) FT_Done_Resource(resource); return error; } EXPORT_DEF TT_Error TT_Open_Face( TT_Engine engine, const TT_Text* pathname, TT_Face* aface ) { if (!engine) return TT_Err_Invalid_Driver_Handle; return open_face( (FT_Library)engine, pathname, 0, aface ); } /***********************************************************************/ /* */ /* <Function> TT_Open_Collection */ /* */ /* <Description> */ /* Loads a given face within a collection. */ /* */ /* <Input> */ /* engine :: TrueType engine object where to load the face */ /* pathname :: the collection's pathname */ /* fontIndex :: index of face within the collection. first is 0 */ /* */ /* <Output> */ /* face :: handle to the new face object. Always set to NULL */ /* in case of error */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* Yes. */ /* */ /* <Note> */ /* This API is provided for backwards compatibility. Please use */ /* the functions TT_New_Collection/TT_Done_Face now to create and */ /* discard face/collection objects. */ /* */ EXPORT_DEF TT_Error TT_Open_Collection( TT_Engine engine, const TT_Text* pathname, TT_ULong fontIndex, TT_Face* aface ) { if (!engine) return TT_Err_Invalid_Driver_Handle; return open_face( (FT_Library)engine, pathname, fontIndex, aface ); } /***********************************************************************/ /* */ /* <Function> TT_Close_Face */ /* */ /* <Description> */ /* Destroys a given face object opened through either TT_Open_Face */ /* of TT_Open_Collection. */ /* */ /* <Input> */ /* face :: handle to the target face object */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* This API is provided for backwards compatibility. Please use */ /* the functions TT_New_Face/TT_Done_Face now to create and */ /* discard face/collection objects. */ /* */ EXPORT_DEF TT_Error TT_Close_Face( TT_Face face ) { FT_Resource resource; if (!face) return TT_Err_Invalid_Face_Handle; resource = face->root.resource; FT_Done_Face( (FT_Face)face ); /* uninstall corresponding resource */ FT_Done_Resource( resource ); return TT_Err_Ok; } /***********************************************************************/ /***********************************************************************/ /***********************************************************************/ /***********************************************************************/ /*********** ***********/ /*********** End of backwards compatible APIs.. ***********/ /*********** ***********/ /***********************************************************************/ /***********************************************************************/ /***********************************************************************/ /***********************************************************************/ /***********************************************************************/ /* */ /* <Function> TT_Get_Face_Properties */ /* */ /* <Description> */ /* Return a given face's properties to the caller. */ /* */ /* <Input> */ /* face :: handle to the source face object */ /* */ /* <Output> */ /* properties :: target properties structure */ /* */ /* <Return> */ /* TrueType error code. 0 means success. */ /* */ /* <MT-Note> */ /* Yes. */ /* */ EXPORT_FUNC TT_Error TT_Get_Face_Properties( TT_Face face, TT_Face_Properties* props ) { props->num_Glyphs = (TT_UShort)face->root.num_glyphs; props->max_Points = (TT_UShort)face->root.max_points; props->max_Contours = (TT_UShort)face->root.max_contours; props->num_CharMaps = (TT_UShort)face->root.num_charmaps; props->num_Faces = face->root.num_faces; props->num_Names = face->num_names; props->header = &face->header; props->horizontal = &face->horizontal; /* The driver supports old Mac fonts where there are no OS/2 */ /* tables present in the file. However, this is not true of */ /* FreeType 1.1. For the sake of backwards compatibility, we */ /* always return the address of the face's os2 table, even if */ /* it is empty (in which case, the 'props.os2' field is set */ /* to NULL.. */ /* */ /* Note however, that the 'os2->version' field is set to */ /* 0xFFFF to indicate a missing table though... */ /* */ props->os2 = &face->os2; props->postscript = &face->postscript; props->hdmx = &face->hdmx; props->vertical = ( face->vertical_info ? &face->vertical : 0 ); return TT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> TT_Set_Face_Pointer. */ /* */ /* <Description> */ /* Each face object contains a typeless pointer, which use is left */ /* to client applications (or the high-level library). This API is */ /* used to set this generic pointer. It is ignored by the driver. */ /* */ /* <Input> */ /* face :: target face object */ /* data :: generic pointer's value */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* The generic pointer is used by the HLib when using the driver */ /* within the FreeType library. */ /* */ EXPORT_FUNC TT_Error TT_Set_Face_Pointer( TT_Face face, void* data ) { if ( !face ) return TT_Err_Invalid_Face_Handle; else face->root.generic.data = data; return TT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> TT_Get_Face_Pointer */ /* */ /* <Description> */ /* Each face object contains a typeless pointer, which use is left */ /* to client applications (or the high-level library). This API is */ /* used to retrieve this generic pointer, which is ignored by the */ /* driver. */ /* */ /* <Input> */ /* face :: handle to source face object */ /* */ /* <Return> */ /* generic pointer value. NULL if the face handle is invalid.. */ /* */ /* <MT-Note> */ /* No. */ /* */ EXPORT_FUNC void* TT_Get_Face_Pointer( TT_Face face ) { return ( face ? face->root.generic.data : NULL ); } /***********************************************************************/ /* */ /* <Function> TT_Get_Face_Metrics */ /* */ /* <Description> */ /* Get the metrics of a given array of glyphs. Returns any number */ /* of metrics arrays. */ /* */ /* <Input> */ /* face :: handle to the source face object */ /* firstGlyph :: index of first glyph in the array */ /* lastGlyph :: index of last glyph in the array */ /* */ /* <Output> */ /* leftBearings :: target array of shorts for the glyph left side */ /* bearings. Set this field to NULL if you're not */ /* interested in these metrics. */ /* */ /* widths :: target array of unsigned shorts for the glyph advance */ /* widths. Set this field to NULL if you're not */ /* interested in these metrics. */ /* */ /* topBearings :: target array of shorts for the glyph top side */ /* bearings. Set this field to NULL if you're not */ /* interested in these metrics. */ /* */ /* heights :: target array of unsigned shorts for the glyph advance */ /* heights. Set this field to NULL if you're not */ /* interested in these metrics. */ /* */ /* <Return> */ /* TrueType error code. 0 means success. */ /* */ /* <MT-Note> */ /* No. */ /* */ /********************************************************/ /* Return horizontal or vertical metrics in font units */ /* for a given glyph. The metrics are the left side */ /* bearing (resp. top side bearing) and advance width */ /* (resp. advance height). */ /* */ /* This function will much probably move to another */ /* component in the short future, but I haven't decided */ /* which yet... */ static void get_metrics( TT_HoriHeader* header, TT_Int index, TT_Short* bearing, TT_UShort* advance ) { TT_LongMetrics* longs_m; TT_UShort k = header->number_Of_HMetrics; if ( index < k ) { longs_m = (TT_LongMetrics*)header->long_metrics + index; *bearing = longs_m->bearing; *advance = longs_m->advance; } else { *bearing = ((TT_ShortMetrics*)header->short_metrics)[index - k]; *advance = ((TT_LongMetrics*)header->long_metrics)[k - 1].advance; } } EXPORT_FUNC TT_Error TT_Get_Face_Metrics( TT_Face face, TT_UShort firstGlyph, TT_UShort lastGlyph, TT_Short* leftBearings, TT_UShort* widths, TT_Short* topBearings, TT_UShort* heights ) { TT_UShort num; if ( !face ) return TT_Err_Invalid_Face_Handle; /* Check the glyph range */ if ( lastGlyph >= face->root.num_glyphs || firstGlyph > lastGlyph ) return TT_Err_Invalid_Argument; num = lastGlyph - firstGlyph; /* number of elements-1 in each array */ /* store the left side bearings and advance widths first */ { TT_UShort n; TT_Short left_bearing; TT_UShort advance_width; for ( n = 0; n <= num; n++ ) { get_metrics( &face->horizontal, firstGlyph + n, &left_bearing, &advance_width ); if ( leftBearings ) leftBearings[n] = left_bearing; if ( widths ) widths[n] = advance_width; } } /* check for vertical data if topBearings or heights is non-NULL */ if ( !topBearings && !heights ) return TT_Err_Ok; if ( !face->vertical_info ) return TT_Err_No_Vertical_Data; /* store the top side bearings */ { TT_UShort n; TT_Short top_bearing; TT_UShort advance_height; for ( n = 0; n <= num; n++ ) { get_metrics( (TT_HoriHeader*)&face->vertical, firstGlyph + n, &top_bearing, &advance_height ); if ( topBearings ) topBearings[n] = top_bearing; if ( heights ) heights[n] = advance_height; } } return TT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> TT_New_Instance */ /* */ /* <Description> */ /* Creates a new instance object from a given face */ /* */ /* <Input> */ /* face :: handle to source/parent face object */ /* */ /* <Output> */ /* instance :: handle to fresh object. Set to NULL in case of */ /* error. */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* Yes. */ /* */ /* <Note> */ /* Any new instance uses a default resolution of 96x96 dpi, and */ /* a default point size of 10 pts. You can change these anytime */ /* with TT_Set_Instance_Resolutions/CharSize/CharSizes/PixelSizes */ /* (see below). */ /* */ EXPORT_FUNC TT_Error TT_New_Instance( TT_Face face, TT_Instance* instance ) { return FT_New_Size( (FT_Face)face, (FT_Size*)instance ); } /***********************************************************************/ /* */ /* <Function> TT_Set_Instance_Resolutions */ /* */ /* <Description> */ /* Sets an instance resolutions in dot-per-inches. Default values */ /* for "new" instances are 96x96 dpi, but these can be changed any */ /* time by calling this API. */ /* */ /* <Input> */ /* instance :: handle to target instance object */ /* xResolution :: horizontal device resolution in dpi. */ /* yResolution :: vertical device resolution in dpi. */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* You should set the charsize or pixel size immediately after */ /* call in multi-htreaded programs. This will force the instance */ /* data to be resetted. Otherwise, you may encounter corruption */ /* when loading two glyphs from the same instance concurrently! */ /* */ /* Happily, 99.99% will do just that :-) */ /* */ /* */ /* */ EXPORT_FUNC TT_Error TT_Set_Instance_Resolutions( TT_Instance ins, TT_UShort xResolution, TT_UShort yResolution ) { return FT_Set_Resolutions( (FT_Size)ins, xResolution, yResolution ); } /***********************************************************************/ /* */ /* <Function> TT_Set_Instance_CharSizes */ /* */ /* <Description> */ /* Same as TT_Set_Instance_CharSize, but used to specify distinct */ /* horizontal and vertical coordinates. */ /* */ /* <Input> */ /* instance :: handle to target instance object */ /* charWidth :: horizontal character size (26.6 points) */ /* charHeight :: vertical character size (26.6 points) */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* There is no check for overflow; with other words, the product */ /* of glyph dimensions times the device resolution must have */ /* reasonable values. */ /* */ EXPORT_FUNC TT_Error TT_Set_Instance_CharSizes( TT_Instance ins, TT_F26Dot6 charWidth, TT_F26Dot6 charHeight ) { return FT_Set_Char_Sizes( (FT_Size)ins, charWidth, charHeight ); } /***********************************************************************/ /* */ /* <Function> TT_Set_Instance_CharSize */ /* */ /* <Description> */ /* Sets an instance's character size. The size is in fractional */ /* (26.6) point units. This function sets the horizontal and */ /* vertical sizes to be equal. Use TT_Set_Instance_CharSizes */ /* for distinct X and Y char sizes. */ /* */ /* The default charsize of a new instance object is 10 pts. */ /* */ /* <Input> */ /* instance :: handle to target instance object */ /* charSize :: character size expressed in 26.6 fixed float */ /* points. 1 point = 1/72 dpi. */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ EXPORT_FUNC TT_Error TT_Set_Instance_CharSize( TT_Instance instance, TT_F26Dot6 charSize ) { return TT_Set_Instance_CharSizes( instance, charSize, charSize ); } /***********************************************************************/ /* */ /* <Function> TT_Set_Instance_PixelSizes */ /* */ /* <Description> */ /* This function is used to set an instance's pixel sizes directly */ /* It ignores the instance's resolutions fields, and you'll have to */ /* specify the corresponding pointsize in 26.6 fixed float point */ /* units. The latter is a requirement of the TrueType bytecode */ /* interpreter but can be ignored (or more safely, set to the */ /* maximum pixel size multiplied by 64). */ /* */ /* <Input> */ /* instance :: handle to target instance object */ /* pixelWidth :: horizontal pixel width (integer value) */ /* pixelHeight :: vertical pixel height (integer value) */ /* pointSize :: corresponding point size (26.6 points) */ /* */ /* <Return> */ /* TrueType error code. 0 means success. */ /* */ /* <MT-Note> */ /* No. */ /* */ EXPORT_FUNC TT_Error TT_Set_Instance_PixelSizes( TT_Instance ins, TT_UShort pixelWidth, TT_UShort pixelHeight, TT_F26Dot6 pointSize ) { /* The point size is now ignored by the driver */ (void)pointSize; return FT_Set_Pixel_Sizes( (FT_Size)ins, pixelWidth, pixelHeight ); } /***********************************************************************/ /* */ /* <Function> TT_Get_Instance_Metrics */ /* */ /* <Description> */ /* Returns an instance's metrics into caller space. */ /* */ /* <Input> */ /* instance :: handle to source instance object */ /* */ /* <Output> */ /* metrics :: target instance metrics structure */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* The TT_Instance_Metrics structure differs slightly from the */ /* FT_Instance_Metrics one, which is why we re-implement this */ /* function, rather than call a driver method for this.. */ /* */ EXPORT_FUNC TT_Error TT_Get_Instance_Metrics( TT_Instance ins, TT_Instance_Metrics* metrics ) { TT_Size size = (TT_Size)ins; if (!ins) return TT_Err_Invalid_Instance_Handle; metrics->x_scale = size->root.metrics.x_scale; metrics->y_scale = size->root.metrics.y_scale; metrics->x_resolution = size->root.metrics.x_resolution; metrics->y_resolution = size->root.metrics.y_resolution; metrics->x_ppem = size->root.metrics.x_ppem; metrics->y_ppem = size->root.metrics.y_ppem; metrics->pointSize = size->root.metrics.pointSize; return TT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> TT_Set_Instance_Pointer */ /* */ /* <Description> */ /* Each instance object contains a typeless pointer, which use is */ /* left to client applications (or the high-level library). This */ /* API is used to set this generic pointer. It is ignored by the */ /* driver. */ /* */ /* <Input> */ /* instance :: handle to the target instance object */ /* data :: value of the generic pointer */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ EXPORT_FUNC TT_Error TT_Set_Instance_Pointer( TT_Instance ins, void* data ) { if ( !ins ) return TT_Err_Invalid_Instance_Handle; else ((FT_Size)ins)->generic.data = data; return TT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> TT_Get_Instance_Pointer */ /* */ /* <Description> */ /* Each instance object contains a typeless pointer, which use is */ /* left to client applications (or the high-level library). This */ /* API is used to retrieve this generic pointer. It is ignored by */ /* the driver. */ /* */ /* <Input> */ /* instance :: handle to source instance object */ /* */ /* <Return> */ /* value of generic pointer. NULL if invalid instance */ /* */ /* <MT-Note> */ /* No. */ EXPORT_FUNC void* TT_Get_Instance_Pointer( TT_Instance instance ) { if ( !instance ) return NULL; else return ((FT_Size)instance)->generic.data; } /***********************************************************************/ /* */ /* <Function> TT_Done_Instance */ /* */ /* <Description> */ /* Destroys a given instance object. All instances are destroyed */ /* automatically when their parent face object is discarded. */ /* However, this API can be used to save memory. */ /* */ /* <Input> */ /* instance :: handle to target instance object */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ EXPORT_FUNC TT_Error TT_Done_Instance( TT_Instance ins ) { FT_Done_Size( (FT_Size)ins ); return TT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> TT_Set_Instance_Transform_Flags */ /* */ /* <Description> */ /* Nothing. This function has been deprecated... */ /* */ /* <Input> */ /* instance :: handle to target instance object */ /* rotated :: 'rotation' flag.. */ /* stretched :: 'stretch' flag.. */ /* */ /* <Return> */ /* Always 0. */ /* */ /* <Note> */ /* This function has been deprecated !! Do not use it, it doesn't */ /* do anything now.. */ /* */ EXPORT_FUNC TT_Error TT_Set_Instance_Transform_Flags( TT_Instance instance, TT_Bool rotated, TT_Bool stretched ) { (void)instance; /* the parameters are unused, the (void) prevents */ (void)rotated; /* warnings from pedantic compilers.. */ (void)stretched; return TT_Err_Ok; } /***********************************************************************/ /* */ /* <Function> */ /* */ /* <Description> */ /* */ /* */ /* <Input> */ /* */ /* */ /* <Output> */ /* */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* */ /* <MT-Note> */ /* */ /* */ /* */ /* <Note> */ /* */ /* */ /* */ /******************************************************************* * * Function : TT_New_Glyph * * Description : Creates a new glyph object related to a given * face. * * Input : face the face handle * glyph address of target glyph handle * * Output : Error code. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_New_Glyph( TT_Face face, TT_Glyph* aglyph ) { return FT_New_GlyphSlot( (FT_Face)face, (FT_GlyphSlot*)aglyph ); } /******************************************************************* * * Function : TT_Done_Glyph * * Description : Destroys a given glyph object. * * Input : glyph the glyph handle * * Output : Error code. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Done_Glyph( TT_Glyph glyph ) { FT_Done_GlyphSlot( (FT_GlyphSlot)glyph ); return TT_Err_Ok; } /******************************************************************* * * Function : TT_Load_Glyph * * Description : Loads a glyph. * * Input : instance the instance handle * glyph the glyph handle * glyphIndex the glyph index * loadFlags flags controlling how to load the glyph * (none, scaled, hinted, both) * * Output : Error code. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Load_Glyph( TT_Instance instance, TT_Glyph glyph, TT_UShort glyphIndex, TT_UShort loadFlags ) { TT_Int result, flags; flags = 0; /* Convert load flags */ if ( (loadFlags & TTLOAD_SCALE_GLYPH) == 0 ) flags = FT_LOAD_NO_SCALE; else if ( (loadFlags & TTLOAD_HINT_GLYPH) == 0 ) flags = FT_LOAD_NO_HINTING; else flags = FT_LOAD_DEFAULT; flags |= FT_LOAD_NO_BITMAP | /* prevent bitmap loading for */ FT_LOAD_LINEAR; /* compatibility purposes.. */ return FT_Load_Glyph( (FT_GlyphSlot)glyph, (FT_Size)instance, glyphIndex, flags, &result ); } /******************************************************************* * * Function : TT_Get_Glyph_Outline * * Description : Returns the glyph's outline data. * * Input : glyph the glyph handle * outline address where the glyph outline will be returned * * Output : Error code. * * MT-Safe : YES! Reads only semi-permanent data. * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Glyph_Outline( TT_Glyph glyph, TT_Outline* outline ) { FT_GlyphSlot slot = (FT_GlyphSlot)glyph; if (!glyph) return TT_Err_Invalid_Glyph_Handle; /* the structures TT_Outline and FT_Outline are equivalent */ *((FT_Outline*)outline) = slot->outline; return TT_Err_Ok; } /******************************************************************* * * Function : TT_Get_Glyph_Metrics * * Description : Extracts the glyph's horizontal metrics information. * * Input : glyph glyph object handle * metrics address where metrics will be returned * * Output : Error code. * * MT-Safe : NO! Glyph containers can't be shared. * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Glyph_Metrics( TT_Glyph glyph, TT_Glyph_Metrics* metrics ) { FT_GlyphSlot slot = (FT_GlyphSlot)glyph; if (!glyph) return TT_Err_Invalid_Glyph_Handle; /* TT_Glyph_Metrics and FT_Glyph_Metrics are slightly different */ metrics->bbox.xMin = slot->metrics.horiBearingX; metrics->bbox.xMax = slot->metrics.horiBearingX + slot->metrics.width; metrics->bbox.yMax = slot->metrics.horiBearingY; metrics->bbox.yMin = slot->metrics.horiBearingY - slot->metrics.height; metrics->bearingX = slot->metrics.horiBearingX; metrics->bearingY = slot->metrics.horiBearingY; metrics->advance = slot->metrics.horiAdvance; return TT_Err_Ok; } /******************************************************************* * * Function : TT_Get_Big_Glyph_Metrics * * Description : Extracts the glyph's big metrics information. * * Input : glyph glyph object handle * metrics address where big metrics will be returned * * Output : Error code. * * MT-Safe : NO! Glyph containers can't be shared. * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Glyph_Big_Metrics( TT_Glyph glyph, TT_Big_Glyph_Metrics* metrics ) { FT_GlyphSlot slot = (FT_GlyphSlot)glyph; FT_Glyph_Metrics* met; FT_Glyph_Metrics* met2; if (!glyph) return TT_Err_Invalid_Glyph_Handle; met = &slot->metrics; met2 = &slot->metrics2; metrics->bbox.xMin = met->horiBearingX; metrics->bbox.xMax = met->horiBearingX + met->width; metrics->bbox.yMin = met->horiBearingY - met->height; metrics->bbox.yMax = met->horiBearingY; metrics->horiBearingX = met->horiBearingX; metrics->horiBearingY = met->horiBearingY; metrics->horiAdvance = met->horiAdvance; metrics->vertBearingX = met->vertBearingX; metrics->vertBearingY = met->vertBearingY; metrics->vertAdvance = met->vertAdvance; metrics->linearHoriAdvance = met2->horiAdvance; metrics->linearHoriBearingX = met2->horiBearingX; metrics->linearVertAdvance = met2->vertAdvance; metrics->linearVertBearingY = met2->vertBearingY; return TT_Err_Ok; } /******************************************************************* * * Function : TT_Get_Glyph_Bitmap * * Description : Produces a bitmap from a glyph outline. * * Input : glyph the glyph container's handle * map target pixmap description block * xOffset x offset in fractional pixels (26.6 format) * yOffset y offset in fractional pixels (26.6 format) * * Output : Error code. * * Note : Only use integer pixel offsets if you want to preserve * the fine hints applied to the outline. This means that * xOffset and yOffset must be multiples of 64! * * MT-Safe : NO! Glyph containers can't be shared. * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Glyph_Bitmap( TT_Glyph glyph, TT_Raster_Map* map, TT_F26Dot6 xOffset, TT_F26Dot6 yOffset ) { FT_Library library; TT_Error error; FT_GlyphSlot slot = (FT_GlyphSlot)glyph; FT_Outline outline; FT_Raster_Map bitmap; if ( !glyph ) return TT_Err_Invalid_Glyph_Handle; library = slot->face->resource->library; outline = slot->outline; /* XXX : For now, use only dropout mode 2 */ /* outline.dropout_mode = _glyph->scan_type; */ outline.dropout_mode = 2; bitmap.width = map->width; bitmap.rows = map->rows; bitmap.cols = map->cols; bitmap.flow = map->flow; bitmap.pix_bits = 1; bitmap.buffer = map->bitmap; FT_Translate_Outline( &outline, xOffset, yOffset ); error = FT_Get_Outline_Bitmap( library, &outline, &bitmap ); FT_Translate_Outline( &outline, -xOffset, -yOffset ); return error; } /******************************************************************* * * Function : TT_Get_Glyph_Pixmap * * Description : Produces a grayscaled pixmap from a glyph * outline. * * Input : glyph the glyph container's handle * map target pixmap description block * xOffset x offset in fractional pixels (26.6 format) * yOffset y offset in fractional pixels (26.6 format) * * Output : Error code. * * Note : Only use integer pixel offsets to preserve the fine * hinting of the glyph and the 'correct' anti-aliasing * (where vertical and horizontal stems aren't grayed). * This means that xOffset and yOffset must be multiples * of 64! * * You can experiment with offsets of +32 to get 'blurred' * versions of the glyphs (a nice effect at large sizes that * some graphic designers may appreciate :) * * MT-Safe : NO! Glyph containers can't be shared. * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Glyph_Pixmap( TT_Glyph glyph, TT_Raster_Map* map, TT_F26Dot6 xOffset, TT_F26Dot6 yOffset ) { FT_Library library; TT_Error error; FT_GlyphSlot slot = (FT_GlyphSlot)glyph; FT_Outline outline; FT_Raster_Map bitmap; if ( !glyph ) return TT_Err_Invalid_Glyph_Handle; library = slot->face->resource->library; outline = slot->outline; /* XXX : For now, use only dropout mode 2 */ /* outline.dropout_mode = _glyph->scan_type; */ outline.dropout_mode = 2; bitmap.width = map->width; bitmap.rows = map->rows; bitmap.cols = map->cols; bitmap.flow = map->flow; bitmap.pix_bits = 8; bitmap.buffer = map->bitmap; FT_Translate_Outline( &outline, xOffset, yOffset ); error = FT_Get_Outline_Bitmap( library, &outline, &bitmap ); FT_Translate_Outline( &outline, -xOffset, -yOffset ); return error; } /***********************************************************************/ /* */ /* <Function> TT_Get_Outline_Bitmap */ /* */ /* <Description> */ /* Renders an outline within a bitmap. The outline's image is */ /* simply or-ed to the target bitmap. */ /* */ /* <Input> */ /* engine :: handle to the TrueType driver object */ /* outline :: pointer to the source outline descriptor */ /* raster :: pointer to the target bitmap descriptor */ /* */ /* <Return> */ /* TrueType error code. 0 means success. */ /* */ /* <MT-Note> */ /* Yes. */ /* */ EXPORT_FUNC TT_Error TT_Get_Outline_Bitmap( TT_Engine engine, TT_Outline* outline, TT_Raster_Map* map ) { FT_Library library = (FT_Library)engine; FT_Raster_Map bitmap; if ( !engine ) return TT_Err_Invalid_Engine; if ( !outline || !map ) return TT_Err_Invalid_Argument; bitmap.width = map->width; bitmap.rows = map->rows; bitmap.cols = map->cols; bitmap.flow = map->flow; bitmap.pix_bits = 1; bitmap.buffer = map->bitmap; return FT_Get_Outline_Bitmap( library, (FT_Outline*)outline, &bitmap ); } /***********************************************************************/ /* */ /* <Function> TT_Get_Outline_Pixmap */ /* */ /* <Description> */ /* Renders an outline within a pixmap. The outline's image is */ /* simply or-ed to the target pixmap. */ /* */ /* <Input> */ /* engine :: handle to the TrueType driver object */ /* outline :: pointer to the source outline descriptor */ /* raster :: pointer to the target pixmap descriptor */ /* */ /* <Return> */ /* TrueType error code. 0 means success. */ /* */ /* <MT-Note> */ /* Yes. */ /* */ EXPORT_FUNC TT_Error TT_Get_Outline_Pixmap( TT_Engine engine, TT_Outline* outline, TT_Raster_Map* map ) { FT_Library library = (FT_Library)engine; FT_Raster_Map bitmap; if ( !engine ) return TT_Err_Invalid_Engine; if ( !outline || !map ) return TT_Err_Invalid_Argument; bitmap.width = map->width; bitmap.rows = map->rows; bitmap.cols = map->cols; bitmap.flow = map->flow; bitmap.pix_bits = 8; bitmap.buffer = map->bitmap; return FT_Get_Outline_Bitmap( library, (FT_Outline*)outline, &bitmap ); } /***********************************************************************/ /* */ /* <Function> TT_New_Outline */ /* */ /* <Description> */ /* Creates a new outline of a given size. */ /* */ /* <Input> */ /* numPoints :: maximum number of points within the outline */ /* */ /* numContours :: maximum number of contours within the outline */ /* */ /* <Output> */ /* outline :: target outline descriptor. */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* Yes. */ /* */ /* <Note> */ /* This function uses 'malloc' to allocate the outline's array, */ /* _unlike_ all other functions in the TrueType API. This means */ /* that the outline won't be destroyed when the TrueType engine */ /* is finalized.. */ /* */ /* It is provided for backwards compatibility ONLY. Use the new */ /* FT_New_Outline function defined in "ftoutln.h" instead if you're */ /* working with the FreeType 2.0 API. */ /* */ #include <stdlib.h> /* for malloc and free */ static TT_Outline null_api_outline = { 0, 0, NULL, NULL, NULL, 0, 0, 0, 0 }; EXPORT_FUNC TT_Error TT_New_Outline( TT_UShort numPoints, TT_Short numContours, TT_Outline* outline ) { if ( !outline ) return TT_Err_Invalid_Argument; *outline = null_api_outline; if ( numPoints > 0 && numContours > 0 ) { outline->points = (TT_Vector*)malloc( numPoints * sizeof(TT_Vector) ); outline->flags = (TT_Byte*) malloc( numPoints * sizeof(TT_Char) ); outline->contours = (TT_UShort*)malloc( numPoints * sizeof(TT_UShort) ); if ( !outline->points || !outline->flags || !outline->contours ) goto Fail; outline->n_points = numPoints; outline->n_contours = numContours; outline->owner = TRUE; } return TT_Err_Ok; Fail: outline->owner = TRUE; TT_Done_Outline( outline ); return TT_Err_Out_Of_Memory; } /***********************************************************************/ /* */ /* <Function> TT_Done_Outline */ /* */ /* <Description> */ /* Destroys an outline created with FT_New_Outline */ /* */ /* <Input> */ /* outline :: */ /* pointer to the outline destructor to discard. This function */ /* doesn't destroy the TT_Outline sturcture, only the data it */ /* contains/own. */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ /* <MT-Note> */ /* No. */ /* */ /* <Note> */ /* This function uses 'free' to discard the outline's arrays. */ /* You should only discard outline allocated with TT_New_Outline. */ /* */ /* It is provided for backwards compatibility ONLY. Use the new */ /* FT_Done_Outline function defined in "ftoutln.h" instead if you're*/ /* working with the FreeType 2.0 API. */ /* */ EXPORT_FUNC TT_Error TT_Done_Outline( TT_Outline* outline ) { if ( outline ) { if ( outline->owner ) { free( outline->points ); free( outline->flags ); free( outline->contours ); } *outline = null_api_outline; return TT_Err_Ok; } else return TT_Err_Invalid_Argument; } /***********************************************************************/ /* */ /* <Function> TT_Copy_Outline */ /* */ /* <Description> */ /* Copy an outline into another one. Both objects must have */ /* the same sizes ( num. points & num. contours ) when this */ /* function is called.. */ /* */ /* <Input> */ /* source :: handle to source outline */ /* target :: handle to target outline */ /* */ /* <Return> */ /* TrueType error code. 0 means success */ /* */ EXPORT_FUNC TT_Error TT_Copy_Outline( TT_Outline* source, TT_Outline* target ) { return FT_Copy_Outline( (FT_Outline*)source, (FT_Outline*)target ); } /******************************************************************* * * Function : TT_Transform_Outline * * Description : Applies a simple transformation to an outline. * * Input : outline the glyph's outline. Can be extracted * from a glyph container through * TT_Get_Glyph_Outline(). * * matrix simple matrix with 16.16 fixed floats * * Output : Error code (always TT_Err_Ok). * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC void TT_Transform_Outline( TT_Outline* outline, TT_Matrix* matrix ) { FT_Transform_Outline( (FT_Outline*)outline, (FT_Matrix*)matrix ); } /******************************************************************* * * Function : TT_Transform_Vector * * Description : Apply a simple transform to a vector * * Input : x, y the vector. * * matrix simple matrix with 16.16 fixed floats * * Output : None. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC void TT_Transform_Vector( TT_F26Dot6* x, TT_F26Dot6* y, TT_Matrix* matrix ) { FT_Transform_Vector( x, y, (FT_Matrix*) matrix ); } /******************************************************************* * * Function : TT_Translate_Outline * * Description : Applies a simple translation. * * Input : outline no comment :) * xOffset * yOffset * * Output : Error code. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC void TT_Translate_Outline( TT_Outline* outline, TT_F26Dot6 xOffset, TT_F26Dot6 yOffset ) { FT_Translate_Outline( (FT_Outline*)outline, xOffset, yOffset ); } /******************************************************************* * * Function : TT_Get_Outline_BBox * * Description : Returns an outline's bounding box. * * Input : outline no comment :) * bbox address where the bounding box is returned * * Output : Error code. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Outline_BBox( TT_Outline* outline, TT_BBox* bbox ) { return FT_Get_Outline_CBox( (FT_Outline*)outline, (FT_BBox*)bbox ); } /***********************************************************************/ /* */ /* <Function> */ /* */ /* <Description> */ /* */ /* */ /* <Input> */ /* */ /* */ /* <Output> */ /* */ /* */ /* <Return> */ /* */ /* */ /* <MT-Note> */ /* */ /* */ /* */ /* <Note> */ /* */ /* */ /* */ /* Compute A*B/C with 64 bits intermediate precision. */ EXPORT_FUNC TT_Long TT_MulDiv( TT_Long A, TT_Long B, TT_Long C ) { return FT_MulDiv( A, B, C ); } /***********************************************************************/ /* */ /* <Function> */ /* */ /* <Description> */ /* */ /* */ /* <Input> */ /* */ /* */ /* <Output> */ /* */ /* */ /* <Return> */ /* */ /* */ /* <MT-Note> */ /* */ /* */ /* */ /* <Note> */ /* */ /* */ /* */ /* Compute A*B/0x10000 with 64 bits intermediate precision. */ /* Useful to multiply by a 16.16 fixed float value. */ EXPORT_FUNC TT_Long TT_MulFix( TT_Long A, TT_Long B ) { return FT_MulFix( A, B ); } /* ----------------- character mappings support ------------- */ /******************************************************************* * * Function : TT_Get_CharMap_Count * * Description : Returns the number of charmaps in a given face. * * Input : face face object handle * * Output : Number of tables. -1 in case of error (bad handle). * * Note : DON'T USE THIS FUNCTION! IT HAS BEEN DEPRECATED! * * It is retained for backwards compatibility only and will * fail on 16bit systems. * * MT-Safe : YES ! * ******************************************************************/ EXPORT_FUNC int TT_Get_CharMap_Count( TT_Face face ) { FT_Face _face = (FT_Face)face; return ( _face ? _face->num_charmaps : -1 ); } /******************************************************************* * * Function : TT_Get_CharMap_ID * * Description : Returns the ID of a given charmap. * * Input : face face object handle * charmapIndex index of charmap in directory * platformID address of returned platform ID * encodingID address of returned encoding ID * * Output : error code * * MT-Safe : YES ! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_CharMap_ID( TT_Face face, TT_UShort charmapIndex, TT_UShort* platformID, TT_UShort* encodingID ) { TT_CharMap cmap; if ( !face ) return TT_Err_Invalid_Face_Handle; if ( charmapIndex >= face->num_charmaps ) return TT_Err_Bad_Argument; cmap = (TT_CharMap)face->charmaps + charmapIndex; *platformID = cmap->root.platform_id; *encodingID = cmap->root.encoding_id; return TT_Err_Ok; } /******************************************************************* * * Function : TT_Get_CharMap * * Description : Looks up a charmap. * * Input : face face object handle * charmapIndex index of charmap in directory * charMap address of returned charmap handle * * Output : Error code. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_CharMap( TT_Face face, TT_UShort charmapIndex, TT_CharMap* charMap ) { if ( !face ) return TT_Err_Invalid_Face_Handle; if ( charmapIndex >= face->num_charmaps ) return TT_Err_Bad_Argument; *charMap = (TT_CharMap)face->charmaps + charmapIndex; return TT_Err_Ok; } /******************************************************************* * * Function : TT_Char_Index * * Description : Returns the glyph index corresponding to * a given character code defined for the 'charmap'. * * Input : charMap charmap handle * charcode character code * * Output : glyph index. * * Notes : Character code 0 is the unknown glyph, which should never * be displayed. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_UShort TT_Char_Index( TT_CharMap charMap, TT_UShort charCode ) { return tt_interface->get_char_index( (FT_CharMap)charMap, charCode ); } /******************************************************************* * * Function : TT_Get_Name_Count * * Description : Returns the number of strings found in the * name table. * * Input : face face handle * * Output : number of strings. * * Notes : Returns -1 on error (invalid handle). * * DON'T USE THIS FUNCTION! IT HAS BEEN DEPRECATED! * * It is retained for backwards compatibility only and will * fail on 16bit systems. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC int TT_Get_Name_Count( TT_Face face ) { if ( !face ) return -1; return face->num_names; } /******************************************************************* * * Function : TT_Get_Name_ID * * Description : Returns the IDs of the string number 'nameIndex' * in the name table of a given face. * * Input : face face handle * nameIndex index of string. First is 0 * platformID addresses of returned IDs * encodingID * languageID * nameID * * Output : Error code. * * Notes : Some files have a corrupt or unusual name table, with some * entries having a platformID > 3. These can usually * be ignored by a client application. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Name_ID( TT_Face face, TT_UShort nameIndex, TT_UShort* platformID, TT_UShort* encodingID, TT_UShort* languageID, TT_UShort* nameID ) { TT_NameRec* name; if (!face) return TT_Err_Invalid_Face_Handle; if ( nameIndex >= face->num_names ) return TT_Err_Bad_Argument; name = face->name_table.names + nameIndex; *platformID = name->platformID; *encodingID = name->encodingID; *languageID = name->languageID; *nameID = name->nameID; return TT_Err_Ok; } /******************************************************************* * * Function : TT_Get_Name_String * * Description : Returns the address and length of a given * string found in the name table. * * Input : face face handle * nameIndex string index * stringPtr address of returned pointer to string * length address of returned string length * * Output : Error code. * * Notes : If the string's platformID is invalid, * stringPtr is NULL, and length is 0. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Name_String( TT_Face face, TT_UShort nameIndex, TT_String** stringPtr, TT_UShort* length ) { TT_NameRec* name; if (!face) return TT_Err_Invalid_Face_Handle; if ( nameIndex >= face->num_names ) return TT_Err_Bad_Argument; name = face->name_table.names + nameIndex; *stringPtr = (TT_String*)name->string; *length = name->stringLength; return TT_Err_Ok; } /******************************************************************* * * Function : TT_Get_Font_Data * * Description : Loads any font table in client memory. Used by * the TT_Get_Font_Data(). * * Input : face Face object to look for. * * tag Tag of table to load. Use the value 0 if you * want to access the whole font file, else set * this parameter to a valid TrueType table tag * that you can forge with the MAKE_TT_TAG * macro. * * offset Starting offset in the table (or the file * if tag == 0). * * buffer Address of target buffer * * length Address of decision variable: * * if length == NULL: * Load the whole table. Returns an * an error if 'offset' != 0. * * if *length == 0 : * Exit immediately, returning the * length of the given table, or of * the font file, depending on the * value of 'tag'. * * if *length != 0 : * Load the next 'length' bytes of * table or font, starting at offset * 'offset' (in table or font too). * * Output : Error code. * * MT-Safe : YES! * ******************************************************************/ EXPORT_FUNC TT_Error TT_Get_Font_Data( TT_Face face, TT_ULong tag, TT_Long offset, void* buffer, TT_Long* length ) { return tt_extension->get_font_data( face, tag, offset, buffer, length ); } /*******************************************************************/ /* */ /* */ /* */ /* Postscript Names extension */ /* */ /* */ /* */ /*******************************************************************/ /* Initialise the Postscript Names extension */ EXPORT_FUNC TT_Error TT_Init_Post_Extension( TT_Engine engine ) { (void)engine; return TT_Err_Ok; } /* Load the Postscript Names table - notice that the 'post' parameter */ /* will be ignored in 2.0. */ EXPORT_DEF TT_Error TT_Load_PS_Names( TT_Face face, void* post ) { (void)post; (void)face; /* the names are now loaded on demand in 2.0 */ return TT_Err_Ok; } /* The following is directly implemented in the TrueType driver */ #if 0 /* Gets the postscript name of a single glyph */ EXPORT_DEF TT_Error TT_Get_PS_Name( TT_Face face, TT_UShort index, TT_String** PSname ); #endif /*******************************************************************/ /* */ /* */ /* */ /* Embedded Bitmap (sbits) extension */ /* */ /* */ /* */ /*******************************************************************/ /*************************************************************/ /* */ /* <Function> */ /* TT_Init_SBit_Extension */ /* */ /* <Description> */ /* Initialise the embedded bitmaps extension for the */ /* FreeType engine. */ /* */ /* <Input> */ /* engine :: handle to current FreeType library instance */ /* */ /* <Return> */ /* Error code. 0 means success. */ /* */ EXPORT_FUNC TT_Error TT_Init_SBit_Extension( TT_Engine engine ) { (void)engine; return TT_Err_Ok; } /*************************************************************/ /* */ /* <Function> */ /* TT_Get_Face_Bitmaps */ /* */ /* <Description> */ /* Loads the "EBLC" table from a font file, if any. */ /* */ /* <Input> */ /* face :: handle to the source TrueType font/face */ /* */ /* <Output> */ /* eblc_table :: a descriptor for the EBLC table */ /* */ /* <Return> */ /* Error code. 0 means success. */ /* */ /* <Note> */ /* This function returns TT_Err_Table_Missing when the */ /* font contains no embedded bitmaps. All fields in */ /* "eblc_table" will then be set to 0. */ /* */ EXPORT_FUNC TT_Error TT_Get_Face_Bitmaps( TT_Face face, TT_EBLC *eblc_table ) { if (!face) return FT_Err_Invalid_Face_Handle; eblc_table->num_strikes = face->num_sbit_strikes; eblc_table->strikes = face->sbit_strikes; if ( face->num_sbit_strikes > 0 ) { eblc_table->version = 0x00002000; return TT_Err_Ok; } eblc_table->version = 0; return TT_Err_Table_Missing; } /*************************************************************/ /* */ /* <Function> */ /* TT_New_SBit_Image */ /* */ /* <Description> */ /* Allocates a new embedded bitmap container */ /* */ /* <Output> */ /* image :: sbit image */ /* */ /* <Return> */ /* Error code. 0 means success. */ /* */ EXPORT_DEF TT_Error TT_New_SBit_Image( TT_SBit_Image* *image ) { *image = (TT_SBit_Image*)malloc( sizeof(**image) ); if ( !*image ) return TT_Err_Out_Of_Memory; MEM_Set( *image, sizeof(**image), 0 ); return TT_Err_Ok; } /*************************************************************/ /* */ /* <Function> */ /* TT_Done_SBit_Image */ /* */ /* <Description> */ /* Releases an embedded bitmap container */ /* */ /* <Input> */ /* image :: sbit image */ /* */ EXPORT_DEF void TT_Done_SBit_Image( TT_SBit_Image* image ) { free( image->map.bitmap ); free( image ); } /*************************************************************/ /* */ /* <Function> */ /* TT_Load_Glyph_Bitmap */ /* */ /* <Description> */ /* Loads a given glyph embedded bitmap */ /* */ /* <Input> */ /* face :: handle to the source TrueType font/face */ /* instance :: current size/transform instance */ /* glyph_index :: index of source glyph */ /* bitmap :: target embedded bitmap descriptor */ /* */ /* <Return> */ /* Error code. 0 means success. */ /* */ /* <Note> */ /* This function returns an error if there is no */ /* embedded bitmap for the glyph at the given */ /* instance. */ /* */ EXPORT_FUNC TT_Error TT_Load_Glyph_Bitmap( TT_Face face, TT_Instance instance, TT_UShort glyph_index, TT_SBit_Image* bitmap ) { FT_GlyphSlot slot; TT_Error error; error = FT_New_GlyphSlot( (FT_Face)face, &slot ); if (error) goto Exit; error = FT_Load_Glyph( slot, (FT_Size)instance, glyph_index, FT_LOAD_NO_OUTLINE, 0 ); if (!error) { /* copy bitmap */ bitmap->map.width = slot->bitmap.width; bitmap->map.rows = slot->bitmap.rows; bitmap->map.cols = slot->bitmap.cols; bitmap->map.flow = slot->bitmap.flow; bitmap->bit_depth = slot->bitmap.pix_bits; bitmap->map.bitmap = slot->bitmap.buffer; /* copy metrics */ bitmap->metrics.bbox.xMin = slot->metrics.horiBearingX >> 6; bitmap->metrics.bbox.xMax = bitmap->metrics.bbox.xMin + (slot->metrics.width >> 6); bitmap->metrics.bbox.yMax = slot->metrics.horiBearingY >> 6; bitmap->metrics.bbox.yMin = bitmap->metrics.bbox.yMax - (slot->metrics.height >> 6); bitmap->metrics.horiBearingX = bitmap->metrics.bbox.xMin; bitmap->metrics.horiBearingY = bitmap->metrics.bbox.yMax; bitmap->metrics.horiAdvance = slot->metrics.horiAdvance >> 6; bitmap->metrics.vertBearingX = slot->metrics.vertBearingX >> 6; bitmap->metrics.vertBearingY = slot->metrics.vertBearingY >> 6; bitmap->metrics.vertAdvance = slot->metrics.vertAdvance >> 6; slot->bitmap.buffer = 0; } FT_Done_GlyphSlot( slot ); Exit: return error; } /* END */