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@ -17,6 +17,7 @@ |
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#include <t1driver.h> |
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#include <t1gload.h> |
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#include <t1afm.h> |
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#include <ftdebug.h> |
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#include <ftstream.h> |
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@ -25,6 +26,97 @@ |
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#undef FT_COMPONENT |
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#define FT_COMPONENT trace_t1driver |
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#ifndef T1_CONFIG_OPTION_NO_AFM |
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/*************************************************************************/ |
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/* */ |
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/* <Function> */ |
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/* Get_Interface */ |
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/* */ |
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/* <Description> */ |
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/* Each driver can provide one or more extensions to the base */ |
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/* FreeType API. These can be used to access format specific */ |
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/* features (e.g., all TrueType/OpenType resources share a common */ |
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/* file structure and common tables which can be accessed through the */ |
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/* `sfnt' interface), or more simply generic ones (e.g., the */ |
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/* `postscript names' interface which can be used to retrieve the */ |
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/* PostScript name of a given glyph index). */ |
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/* */ |
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/* <InOut> */ |
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/* driver :: A handle to a driver object. */ |
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/* */ |
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/* <Input> */ |
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/* interface :: A string designing the interface. Examples are */ |
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/* `sfnt', `post_names', `charmaps', etc. */ |
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/* */ |
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/* <Return> */ |
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/* A typeless pointer to the extension's interface (normally a table */ |
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/* of function pointers). Returns NULL if the requested extension */ |
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/* isn't available (i.e., wasn't compiled in the driver at build */ |
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/* time). */ |
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/* */ |
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static |
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void* Get_Interface)( FT_Driver driver, |
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const FT_String* interface ) |
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{ |
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if ( strcmp( (const char*)interface, "attach_file" ) == 0 ) |
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return T1_Read_AFM; |
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return 0; |
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} |
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/*************************************************************************/ |
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/* */ |
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/* <Function> */ |
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/* Get_Kerning */ |
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/* */ |
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/* <Description> */ |
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/* A driver method used to return the kerning vector between two */ |
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/* glyphs of the same face. */ |
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/* */ |
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/* <Input> */ |
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/* face :: A handle to the source face object. */ |
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/* */ |
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/* left_glyph :: The index of the left glyph in the kern pair. */ |
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/* */ |
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/* right_glyph :: The index of the right glyph in the kern pair. */ |
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/* */ |
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/* <Output> */ |
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/* kerning :: The kerning vector. This is in font units for */ |
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/* scalable formats, and in pixels for fixed-sizes */ |
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/* formats. */ |
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/* */ |
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/* <Return> */ |
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/* FreeType error code. 0 means success. */ |
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/* */ |
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/* <Note> */ |
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/* Only horizontal layouts (left-to-right & right-to-left) are */ |
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/* supported by this function. Other layouts, or more sophisticated */ |
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/* kernings are out of scope of this method (the basic driver */ |
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/* interface is meant to be simple). */ |
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/* */ |
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/* They can be implemented by format-specific interfaces. */ |
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/* */ |
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static |
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T1_Error Get_Kerning( T1_Face face, |
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T1_UInt left_glyph, |
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T1_UInt right_glyph, |
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T1_Vector* kerning ) |
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{ |
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T1_AFM* afm; |
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kerning->x = 0; |
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kerning->y = 0; |
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afm = (T1_AFM*)face->afm_data; |
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if (afm) |
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T1_Get_Kerning( afm, left_glyph, right_glyph, kerning ); |
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return T1_Err_Ok; |
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} |
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#endif |
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/******************************************************************/ |
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/* */ |
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/* <Function> Set_Char_Sizes */ |
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@ -394,11 +486,21 @@ |
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(FTDriver_initDriver) T1_Init_Driver, |
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(FTDriver_doneDriver) T1_Done_Driver, |
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#ifdef T1_CONFIG_OPTION_NO_AFM |
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(FTDriver_getInterface) 0, |
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#else |
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(FTDriver_getInterface) Get_Interface, |
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#endif |
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(FTDriver_initFace) Init_Face, |
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(FTDriver_doneFace) T1_Done_Face, |
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#ifdef T1_CONFIG_OPTION_NO_AFM |
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(FTDriver_getKerning) 0, |
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#else |
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(FTDriver_getKerning) Get_Kerning, |
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#endif |
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(FTDriver_initSize) T1_Init_Size, |
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(FTDriver_doneSize) T1_Done_Size, |
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David Turner
25 years ago