| /**************************************************************************** |
| * |
| * sfnt.h |
| * |
| * High-level 'sfnt' driver interface (specification). |
| * |
| * Copyright (C) 1996-2022 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. |
| * |
| */ |
| |
| |
| #ifndef SFNT_H_ |
| #define SFNT_H_ |
| |
| |
| #include <freetype/internal/ftdrv.h> |
| #include <freetype/internal/tttypes.h> |
| #include <freetype/internal/wofftypes.h> |
| |
| |
| FT_BEGIN_HEADER |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Init_Face_Func |
| * |
| * @description: |
| * First part of the SFNT face object initialization. This finds the |
| * face in a SFNT file or collection, and load its format tag in |
| * face->format_tag. |
| * |
| * @input: |
| * stream :: |
| * The input stream. |
| * |
| * face :: |
| * A handle to the target face object. |
| * |
| * face_index :: |
| * The index of the TrueType font, if we are opening a collection, in |
| * bits 0-15. The numbered instance index~+~1 of a GX (sub)font, if |
| * applicable, in bits 16-30. |
| * |
| * num_params :: |
| * The number of additional parameters. |
| * |
| * params :: |
| * Optional additional parameters. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| * |
| * @note: |
| * The stream cursor must be at the font file's origin. |
| * |
| * This function recognizes fonts embedded in a 'TrueType collection'. |
| * |
| * Once the format tag has been validated by the font driver, it should |
| * then call the TT_Load_Face_Func() callback to read the rest of the |
| * SFNT tables in the object. |
| */ |
| typedef FT_Error |
| (*TT_Init_Face_Func)( FT_Stream stream, |
| TT_Face face, |
| FT_Int face_index, |
| FT_Int num_params, |
| FT_Parameter* params ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_Face_Func |
| * |
| * @description: |
| * Second part of the SFNT face object initialization. This loads the |
| * common SFNT tables (head, OS/2, maxp, metrics, etc.) in the face |
| * object. |
| * |
| * @input: |
| * stream :: |
| * The input stream. |
| * |
| * face :: |
| * A handle to the target face object. |
| * |
| * face_index :: |
| * The index of the TrueType font, if we are opening a collection, in |
| * bits 0-15. The numbered instance index~+~1 of a GX (sub)font, if |
| * applicable, in bits 16-30. |
| * |
| * num_params :: |
| * The number of additional parameters. |
| * |
| * params :: |
| * Optional additional parameters. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| * |
| * @note: |
| * This function must be called after TT_Init_Face_Func(). |
| */ |
| typedef FT_Error |
| (*TT_Load_Face_Func)( FT_Stream stream, |
| TT_Face face, |
| FT_Int face_index, |
| FT_Int num_params, |
| FT_Parameter* params ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Done_Face_Func |
| * |
| * @description: |
| * A callback used to delete the common SFNT data from a face. |
| * |
| * @input: |
| * face :: |
| * A handle to the target face object. |
| * |
| * @note: |
| * This function does NOT destroy the face object. |
| */ |
| typedef void |
| (*TT_Done_Face_Func)( TT_Face face ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_Any_Func |
| * |
| * @description: |
| * Load any font table into client memory. |
| * |
| * @input: |
| * face :: |
| * The face object to look for. |
| * |
| * tag :: |
| * The 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 :: |
| * The starting offset in the table (or the file if tag == 0). |
| * |
| * length :: |
| * The address of the decision variable: |
| * |
| * If `length == NULL`: Loads the whole table. Returns an error if |
| * 'offset' == 0! |
| * |
| * If `*length == 0`: Exits immediately; returning the length of the |
| * given table or of the font file, depending on the value of 'tag'. |
| * |
| * If `*length != 0`: Loads the next 'length' bytes of table or font, |
| * starting at offset 'offset' (in table or font too). |
| * |
| * @output: |
| * buffer :: |
| * The address of target buffer. |
| * |
| * @return: |
| * TrueType error code. 0 means success. |
| */ |
| typedef FT_Error |
| (*TT_Load_Any_Func)( TT_Face face, |
| FT_ULong tag, |
| FT_Long offset, |
| FT_Byte *buffer, |
| FT_ULong* length ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Find_SBit_Image_Func |
| * |
| * @description: |
| * Check whether an embedded bitmap (an 'sbit') exists for a given glyph, |
| * at a given strike. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * glyph_index :: |
| * The glyph index. |
| * |
| * strike_index :: |
| * The current strike index. |
| * |
| * @output: |
| * arange :: |
| * The SBit range containing the glyph index. |
| * |
| * astrike :: |
| * The SBit strike containing the glyph index. |
| * |
| * aglyph_offset :: |
| * The offset of the glyph data in 'EBDT' table. |
| * |
| * @return: |
| * FreeType error code. 0 means success. Returns |
| * SFNT_Err_Invalid_Argument if no sbit exists for the requested glyph. |
| */ |
| typedef FT_Error |
| (*TT_Find_SBit_Image_Func)( TT_Face face, |
| FT_UInt glyph_index, |
| FT_ULong strike_index, |
| TT_SBit_Range *arange, |
| TT_SBit_Strike *astrike, |
| FT_ULong *aglyph_offset ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_SBit_Metrics_Func |
| * |
| * @description: |
| * Get the big metrics for a given embedded bitmap. |
| * |
| * @input: |
| * stream :: |
| * The input stream. |
| * |
| * range :: |
| * The SBit range containing the glyph. |
| * |
| * @output: |
| * big_metrics :: |
| * A big SBit metrics structure for the glyph. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| * |
| * @note: |
| * The stream cursor must be positioned at the glyph's offset within the |
| * 'EBDT' table before the call. |
| * |
| * If the image format uses variable metrics, the stream cursor is |
| * positioned just after the metrics header in the 'EBDT' table on |
| * function exit. |
| */ |
| typedef FT_Error |
| (*TT_Load_SBit_Metrics_Func)( FT_Stream stream, |
| TT_SBit_Range range, |
| TT_SBit_Metrics metrics ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_SBit_Image_Func |
| * |
| * @description: |
| * Load a given glyph sbit image from the font resource. This also |
| * returns its metrics. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * strike_index :: |
| * The strike index. |
| * |
| * glyph_index :: |
| * The current glyph index. |
| * |
| * load_flags :: |
| * The current load flags. |
| * |
| * stream :: |
| * The input stream. |
| * |
| * @output: |
| * amap :: |
| * The target pixmap. |
| * |
| * ametrics :: |
| * A big sbit metrics structure for the glyph image. |
| * |
| * @return: |
| * FreeType error code. 0 means success. Returns an error if no glyph |
| * sbit exists for the index. |
| * |
| * @note: |
| * The `map.buffer` field is always freed before the glyph is loaded. |
| */ |
| typedef FT_Error |
| (*TT_Load_SBit_Image_Func)( TT_Face face, |
| FT_ULong strike_index, |
| FT_UInt glyph_index, |
| FT_UInt load_flags, |
| FT_Stream stream, |
| FT_Bitmap *amap, |
| TT_SBit_MetricsRec *ametrics ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_Svg_Doc_Func |
| * |
| * @description: |
| * Scan the SVG document list to find the document containing the glyph |
| * that has the ID 'glyph*XXX*', where *XXX* is the value of |
| * `glyph_index` as a decimal integer. |
| * |
| * @inout: |
| * glyph :: |
| * The glyph slot from which pointers to the SVG document list is to be |
| * grabbed. The results are stored back in the slot. |
| * |
| * @input: |
| * glyph_index :: |
| * The index of the glyph that is to be looked up. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| */ |
| typedef FT_Error |
| (*TT_Load_Svg_Doc_Func)( FT_GlyphSlot glyph, |
| FT_UInt glyph_index ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Set_SBit_Strike_Func |
| * |
| * @description: |
| * Select an sbit strike for a given size request. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * req :: |
| * The size request. |
| * |
| * @output: |
| * astrike_index :: |
| * The index of the sbit strike. |
| * |
| * @return: |
| * FreeType error code. 0 means success. Returns an error if no sbit |
| * strike exists for the selected ppem values. |
| */ |
| typedef FT_Error |
| (*TT_Set_SBit_Strike_Func)( TT_Face face, |
| FT_Size_Request req, |
| FT_ULong* astrike_index ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_Strike_Metrics_Func |
| * |
| * @description: |
| * Load the metrics of a given strike. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * strike_index :: |
| * The strike index. |
| * |
| * @output: |
| * metrics :: |
| * the metrics of the strike. |
| * |
| * @return: |
| * FreeType error code. 0 means success. Returns an error if no such |
| * sbit strike exists. |
| */ |
| typedef FT_Error |
| (*TT_Load_Strike_Metrics_Func)( TT_Face face, |
| FT_ULong strike_index, |
| FT_Size_Metrics* metrics ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_PS_Name_Func |
| * |
| * @description: |
| * Get the PostScript glyph name of a glyph. |
| * |
| * @input: |
| * idx :: |
| * The glyph index. |
| * |
| * PSname :: |
| * The address of a string pointer. Will be `NULL` in case of error, |
| * otherwise it is a pointer to the glyph name. |
| * |
| * You must not modify the returned string! |
| * |
| * @output: |
| * FreeType error code. 0 means success. |
| */ |
| typedef FT_Error |
| (*TT_Get_PS_Name_Func)( TT_Face face, |
| FT_UInt idx, |
| FT_String** PSname ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_Metrics_Func |
| * |
| * @description: |
| * Load a metrics table, which is a table with a horizontal and a |
| * vertical version. |
| * |
| * @input: |
| * face :: |
| * A handle to the target face object. |
| * |
| * stream :: |
| * The input stream. |
| * |
| * vertical :: |
| * A boolean flag. If set, load the vertical one. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| */ |
| typedef FT_Error |
| (*TT_Load_Metrics_Func)( TT_Face face, |
| FT_Stream stream, |
| FT_Bool vertical ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Metrics_Func |
| * |
| * @description: |
| * Load the horizontal or vertical header in a face object. |
| * |
| * @input: |
| * face :: |
| * A handle to the target face object. |
| * |
| * vertical :: |
| * A boolean flag. If set, load vertical metrics. |
| * |
| * gindex :: |
| * The glyph index. |
| * |
| * @output: |
| * abearing :: |
| * The horizontal (or vertical) bearing. Set to zero in case of error. |
| * |
| * aadvance :: |
| * The horizontal (or vertical) advance. Set to zero in case of error. |
| */ |
| typedef void |
| (*TT_Get_Metrics_Func)( TT_Face face, |
| FT_Bool vertical, |
| FT_UInt gindex, |
| FT_Short* abearing, |
| FT_UShort* aadvance ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Set_Palette_Func |
| * |
| * @description: |
| * Load the colors into `face->palette` for a given palette index. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * idx :: |
| * The palette index. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| */ |
| typedef FT_Error |
| (*TT_Set_Palette_Func)( TT_Face face, |
| FT_UInt idx ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Colr_Layer_Func |
| * |
| * @description: |
| * Iteratively get the color layer data of a given glyph index. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * base_glyph :: |
| * The glyph index the colored glyph layers are associated with. |
| * |
| * @inout: |
| * iterator :: |
| * An @FT_LayerIterator object. For the first call you should set |
| * `iterator->p` to `NULL`. For all following calls, simply use the |
| * same object again. |
| * |
| * @output: |
| * aglyph_index :: |
| * The glyph index of the current layer. |
| * |
| * acolor_index :: |
| * The color index into the font face's color palette of the current |
| * layer. The value 0xFFFF is special; it doesn't reference a palette |
| * entry but indicates that the text foreground color should be used |
| * instead (to be set up by the application outside of FreeType). |
| * |
| * @return: |
| * Value~1 if everything is OK. If there are no more layers (or if there |
| * are no layers at all), value~0 gets returned. In case of an error, |
| * value~0 is returned also. |
| */ |
| typedef FT_Bool |
| (*TT_Get_Colr_Layer_Func)( TT_Face face, |
| FT_UInt base_glyph, |
| FT_UInt *aglyph_index, |
| FT_UInt *acolor_index, |
| FT_LayerIterator* iterator ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Color_Glyph_Paint_Func |
| * |
| * @description: |
| * Find the root @FT_OpaquePaint object for a given glyph ID. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * base_glyph :: |
| * The glyph index the colored glyph layers are associated with. |
| * |
| * @output: |
| * paint :: |
| * The root @FT_OpaquePaint object. |
| * |
| * @return: |
| * Value~1 if everything is OK. If no color glyph is found, or the root |
| * paint could not be retrieved, value~0 gets returned. In case of an |
| * error, value~0 is returned also. |
| */ |
| typedef FT_Bool |
| ( *TT_Get_Color_Glyph_Paint_Func )( TT_Face face, |
| FT_UInt base_glyph, |
| FT_Color_Root_Transform root_transform, |
| FT_OpaquePaint *paint ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Color_Glyph_ClipBox_Func |
| * |
| * @description: |
| * Search for a 'COLR' v1 clip box for the specified `base_glyph` and |
| * fill the `clip_box` parameter with the 'COLR' v1 'ClipBox' information |
| * if one is found. |
| * |
| * @input: |
| * face :: |
| * A handle to the parent face object. |
| * |
| * base_glyph :: |
| * The glyph index for which to retrieve the clip box. |
| * |
| * @output: |
| * clip_box :: |
| * The clip box for the requested `base_glyph` if one is found. The |
| * clip box is computed taking scale and transformations configured on |
| * the @FT_Face into account. @FT_ClipBox contains @FT_Vector values |
| * in 26.6 format. |
| * |
| * @note: |
| * To retrieve the clip box in font units, reset scale to units-per-em |
| * and remove transforms configured using @FT_Set_Transform. |
| * |
| * @return: |
| * Value~1 if a ClipBox is found. If no clip box is found or an |
| * error occured, value~0 is returned. |
| */ |
| typedef FT_Bool |
| ( *TT_Get_Color_Glyph_ClipBox_Func )( TT_Face face, |
| FT_UInt base_glyph, |
| FT_ClipBox* clip_box ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Paint_Layers_Func |
| * |
| * @description: |
| * Access the layers of a `PaintColrLayers` table. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * @inout: |
| * iterator :: |
| * The @FT_LayerIterator from an @FT_PaintColrLayers object, for which |
| * the layers are to be retrieved. The internal state of the iterator |
| * is incremented after one call to this function for retrieving one |
| * layer. |
| * |
| * @output: |
| * paint :: |
| * The root @FT_OpaquePaint object referencing the actual paint table. |
| * |
| * @return: |
| * Value~1 if everything is OK. Value~0 gets returned when the paint |
| * object can not be retrieved or any other error occurs. |
| */ |
| typedef FT_Bool |
| ( *TT_Get_Paint_Layers_Func )( TT_Face face, |
| FT_LayerIterator* iterator, |
| FT_OpaquePaint *paint ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Colorline_Stops_Func |
| * |
| * @description: |
| * Get the gradient and solid fill information for a given glyph. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * @inout: |
| * iterator :: |
| * An @FT_ColorStopIterator object. For the first call you should set |
| * `iterator->p` to `NULL`. For all following calls, simply use the |
| * same object again. |
| * |
| * @output: |
| * color_stop :: |
| * Color index and alpha value for the retrieved color stop. |
| * |
| * @return: |
| * Value~1 if everything is OK. If there are no more color stops, |
| * value~0 gets returned. In case of an error, value~0 is returned |
| * also. |
| */ |
| typedef FT_Bool |
| ( *TT_Get_Colorline_Stops_Func )( TT_Face face, |
| FT_ColorStop *color_stop, |
| FT_ColorStopIterator* iterator ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Paint_Func |
| * |
| * @description: |
| * Get the paint details for a given @FT_OpaquePaint object. |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * opaque_paint :: |
| * The @FT_OpaquePaint object. |
| * |
| * @output: |
| * paint :: |
| * An @FT_COLR_Paint object holding the details on `opaque_paint`. |
| * |
| * @return: |
| * Value~1 if everything is OK. Value~0 if no details can be found for |
| * this paint or any other error occured. |
| */ |
| typedef FT_Bool |
| ( *TT_Get_Paint_Func )( TT_Face face, |
| FT_OpaquePaint opaque_paint, |
| FT_COLR_Paint *paint ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Blend_Colr_Func |
| * |
| * @description: |
| * Blend the bitmap in `new_glyph` into `base_glyph` using the color |
| * specified by `color_index`. If `color_index` is 0xFFFF, use |
| * `face->foreground_color` if `face->have_foreground_color` is set. |
| * Otherwise check `face->palette_data.palette_flags`: If present and |
| * @FT_PALETTE_FOR_DARK_BACKGROUND is set, use BGRA value 0xFFFFFFFF |
| * (white opaque). Otherwise use BGRA value 0x000000FF (black opaque). |
| * |
| * @input: |
| * face :: |
| * The target face object. |
| * |
| * color_index :: |
| * Color index from the COLR table. |
| * |
| * base_glyph :: |
| * Slot for bitmap to be merged into. The underlying bitmap may get |
| * reallocated. |
| * |
| * new_glyph :: |
| * Slot to be incooperated into `base_glyph`. |
| * |
| * @return: |
| * FreeType error code. 0 means success. Returns an error if |
| * color_index is invalid or reallocation fails. |
| */ |
| typedef FT_Error |
| (*TT_Blend_Colr_Func)( TT_Face face, |
| FT_UInt color_index, |
| FT_GlyphSlot base_glyph, |
| FT_GlyphSlot new_glyph ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Name_Func |
| * |
| * @description: |
| * From the 'name' table, return a given ENGLISH name record in ASCII. |
| * |
| * @input: |
| * face :: |
| * A handle to the source face object. |
| * |
| * nameid :: |
| * The name id of the name record to return. |
| * |
| * @inout: |
| * name :: |
| * The address of an allocated string pointer. `NULL` if no name is |
| * present. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| */ |
| typedef FT_Error |
| (*TT_Get_Name_Func)( TT_Face face, |
| FT_UShort nameid, |
| FT_String** name ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Get_Name_ID_Func |
| * |
| * @description: |
| * Search whether an ENGLISH version for a given name ID is in the 'name' |
| * table. |
| * |
| * @input: |
| * face :: |
| * A handle to the source face object. |
| * |
| * nameid :: |
| * The name id of the name record to return. |
| * |
| * @output: |
| * win :: |
| * If non-negative, an index into the 'name' table with the |
| * corresponding (3,1) or (3,0) Windows entry. |
| * |
| * apple :: |
| * If non-negative, an index into the 'name' table with the |
| * corresponding (1,0) Apple entry. |
| * |
| * @return: |
| * 1 if there is either a win or apple entry (or both), 0 otheriwse. |
| */ |
| typedef FT_Bool |
| (*TT_Get_Name_ID_Func)( TT_Face face, |
| FT_UShort nameid, |
| FT_Int *win, |
| FT_Int *apple ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Load_Table_Func |
| * |
| * @description: |
| * Load a given TrueType table. |
| * |
| * @input: |
| * face :: |
| * A handle to the target face object. |
| * |
| * stream :: |
| * The input stream. |
| * |
| * @return: |
| * FreeType error code. 0 means success. |
| * |
| * @note: |
| * The function uses `face->goto_table` to seek the stream to the start |
| * of the table, except while loading the font directory. |
| */ |
| typedef FT_Error |
| (*TT_Load_Table_Func)( TT_Face face, |
| FT_Stream stream ); |
| |
| |
| /************************************************************************** |
| * |
| * @functype: |
| * TT_Free_Table_Func |
| * |
| * @description: |
| * Free a given TrueType table. |
| * |
| * @input: |
| * face :: |
| * A handle to the target face object. |
| */ |
| typedef void |
| (*TT_Free_Table_Func)( TT_Face face ); |
| |
| |
| /* |
| * @functype: |
| * TT_Face_GetKerningFunc |
| * |
| * @description: |
| * Return the horizontal kerning value between two glyphs. |
| * |
| * @input: |
| * face :: |
| * A handle to the source face object. |
| * |
| * left_glyph :: |
| * The left glyph index. |
| * |
| * right_glyph :: |
| * The right glyph index. |
| * |
| * @return: |
| * The kerning value in font units. |
| */ |
| typedef FT_Int |
| (*TT_Face_GetKerningFunc)( TT_Face face, |
| FT_UInt left_glyph, |
| FT_UInt right_glyph ); |
| |
| |
| /************************************************************************** |
| * |
| * @struct: |
| * SFNT_Interface |
| * |
| * @description: |
| * This structure holds pointers to the functions used to load and free |
| * the basic tables that are required in a 'sfnt' font file. |
| * |
| * @fields: |
| * Check the various xxx_Func() descriptions for details. |
| */ |
| typedef struct SFNT_Interface_ |
| { |
| TT_Loader_GotoTableFunc goto_table; |
| |
| TT_Init_Face_Func init_face; |
| TT_Load_Face_Func load_face; |
| TT_Done_Face_Func done_face; |
| FT_Module_Requester get_interface; |
| |
| TT_Load_Any_Func load_any; |
| |
| /* these functions are called by `load_face' but they can also */ |
| /* be called from external modules, if there is a need to do so */ |
| TT_Load_Table_Func load_head; |
| TT_Load_Metrics_Func load_hhea; |
| TT_Load_Table_Func load_cmap; |
| TT_Load_Table_Func load_maxp; |
| TT_Load_Table_Func load_os2; |
| TT_Load_Table_Func load_post; |
| |
| TT_Load_Table_Func load_name; |
| TT_Free_Table_Func free_name; |
| |
| /* this field was called `load_kerning' up to version 2.1.10 */ |
| TT_Load_Table_Func load_kern; |
| |
| TT_Load_Table_Func load_gasp; |
| TT_Load_Table_Func load_pclt; |
| |
| /* see `ttload.h'; this field was called `load_bitmap_header' up to */ |
| /* version 2.1.10 */ |
| TT_Load_Table_Func load_bhed; |
| |
| TT_Load_SBit_Image_Func load_sbit_image; |
| |
| /* see `ttpost.h' */ |
| TT_Get_PS_Name_Func get_psname; |
| TT_Free_Table_Func free_psnames; |
| |
| /* starting here, the structure differs from version 2.1.7 */ |
| |
| /* this field was introduced in version 2.1.8, named `get_psname' */ |
| TT_Face_GetKerningFunc get_kerning; |
| |
| /* new elements introduced after version 2.1.10 */ |
| |
| /* load the font directory, i.e., the offset table and */ |
| /* the table directory */ |
| TT_Load_Table_Func load_font_dir; |
| TT_Load_Metrics_Func load_hmtx; |
| |
| TT_Load_Table_Func load_eblc; |
| TT_Free_Table_Func free_eblc; |
| |
| TT_Set_SBit_Strike_Func set_sbit_strike; |
| TT_Load_Strike_Metrics_Func load_strike_metrics; |
| |
| TT_Load_Table_Func load_cpal; |
| TT_Load_Table_Func load_colr; |
| TT_Free_Table_Func free_cpal; |
| TT_Free_Table_Func free_colr; |
| TT_Set_Palette_Func set_palette; |
| TT_Get_Colr_Layer_Func get_colr_layer; |
| TT_Get_Color_Glyph_Paint_Func get_colr_glyph_paint; |
| TT_Get_Color_Glyph_ClipBox_Func get_color_glyph_clipbox; |
| TT_Get_Paint_Layers_Func get_paint_layers; |
| TT_Get_Colorline_Stops_Func get_colorline_stops; |
| TT_Get_Paint_Func get_paint; |
| TT_Blend_Colr_Func colr_blend; |
| |
| TT_Get_Metrics_Func get_metrics; |
| |
| TT_Get_Name_Func get_name; |
| TT_Get_Name_ID_Func get_name_id; |
| |
| /* OpenType SVG Support */ |
| TT_Load_Table_Func load_svg; |
| TT_Free_Table_Func free_svg; |
| TT_Load_Svg_Doc_Func load_svg_doc; |
| |
| } SFNT_Interface; |
| |
| |
| /* transitional */ |
| typedef SFNT_Interface* SFNT_Service; |
| |
| |
| #define FT_DEFINE_SFNT_INTERFACE( \ |
| class_, \ |
| goto_table_, \ |
| init_face_, \ |
| load_face_, \ |
| done_face_, \ |
| get_interface_, \ |
| load_any_, \ |
| load_head_, \ |
| load_hhea_, \ |
| load_cmap_, \ |
| load_maxp_, \ |
| load_os2_, \ |
| load_post_, \ |
| load_name_, \ |
| free_name_, \ |
| load_kern_, \ |
| load_gasp_, \ |
| load_pclt_, \ |
| load_bhed_, \ |
| load_sbit_image_, \ |
| get_psname_, \ |
| free_psnames_, \ |
| get_kerning_, \ |
| load_font_dir_, \ |
| load_hmtx_, \ |
| load_eblc_, \ |
| free_eblc_, \ |
| set_sbit_strike_, \ |
| load_strike_metrics_, \ |
| load_cpal_, \ |
| load_colr_, \ |
| free_cpal_, \ |
| free_colr_, \ |
| set_palette_, \ |
| get_colr_layer_, \ |
| get_colr_glyph_paint_, \ |
| get_color_glyph_clipbox, \ |
| get_paint_layers_, \ |
| get_colorline_stops_, \ |
| get_paint_, \ |
| colr_blend_, \ |
| get_metrics_, \ |
| get_name_, \ |
| get_name_id_, \ |
| load_svg_, \ |
| free_svg_, \ |
| load_svg_doc_ ) \ |
| static const SFNT_Interface class_ = \ |
| { \ |
| goto_table_, \ |
| init_face_, \ |
| load_face_, \ |
| done_face_, \ |
| get_interface_, \ |
| load_any_, \ |
| load_head_, \ |
| load_hhea_, \ |
| load_cmap_, \ |
| load_maxp_, \ |
| load_os2_, \ |
| load_post_, \ |
| load_name_, \ |
| free_name_, \ |
| load_kern_, \ |
| load_gasp_, \ |
| load_pclt_, \ |
| load_bhed_, \ |
| load_sbit_image_, \ |
| get_psname_, \ |
| free_psnames_, \ |
| get_kerning_, \ |
| load_font_dir_, \ |
| load_hmtx_, \ |
| load_eblc_, \ |
| free_eblc_, \ |
| set_sbit_strike_, \ |
| load_strike_metrics_, \ |
| load_cpal_, \ |
| load_colr_, \ |
| free_cpal_, \ |
| free_colr_, \ |
| set_palette_, \ |
| get_colr_layer_, \ |
| get_colr_glyph_paint_, \ |
| get_color_glyph_clipbox, \ |
| get_paint_layers_, \ |
| get_colorline_stops_, \ |
| get_paint_, \ |
| colr_blend_, \ |
| get_metrics_, \ |
| get_name_, \ |
| get_name_id_, \ |
| load_svg_, \ |
| free_svg_, \ |
| load_svg_doc_ \ |
| }; |
| |
| |
| FT_END_HEADER |
| |
| #endif /* SFNT_H_ */ |
| |
| |
| /* END */ |
