forked from minhngoc25a/freetype2
Added types and structures to support incremental typeface loading.
This commit is contained in:
Graham Asher
parent
feb854fd8a
commit
b68af36750
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@ -199,6 +199,30 @@ FT_BEGIN_HEADER
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} FT_Glyph_Metrics;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_Basic_Glyph_Metrics */
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/* */
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/* <Description> */
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/* A small glyph metrics structure used to return information */
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/* for incrementally defined fonts (see FT_Incremental_Interface). */
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/* */
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/* <Fields> */
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/* bearing_x :: Left side bearing in font units. */
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/* */
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/* bearing_y :: Top side bearing in font units. */
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/* */
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/* advance :: Advance in font units. */
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/* */
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typedef struct FT_Basic_Glyph_Metrics_
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{
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FT_Long bearing_x;
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FT_Long bearing_y;
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FT_Long advance;
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} FT_Basic_Glyph_Metrics;
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/*************************************************************************/
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/* */
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/* <Struct> */
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@ -478,6 +502,111 @@ FT_BEGIN_HEADER
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} FT_CharMapRec;
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_Get_Glyph_Data_Func */
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/* */
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/* <Description> */
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/* A type definition for a function to get glyph data from a */
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/* face that supplies glyph data incrementally, after the face */
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/* object has been created */
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/* */
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/* <Input> */
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/* object :: a pointer to the user's data, specified by the 'object' */
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/* field in FT_Incremental_Interface */
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/* */
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/* index :: the glyph index */
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/* */
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/* <Output> */
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/* data :: the position and length of the data */
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/* */
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/* <Return> */
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/* a standard error code */
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/* */
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typedef FT_Error (*FT_Get_Glyph_Data_Func)(void* object,FT_UInt index,FT_Data* data);
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/*************************************************************************/
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/* */
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/* <Type> */
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/* FT_Get_Glyph_Metrics_Func */
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/* */
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/* <Description> */
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/* A type definition for a function to get glyph metrics from a */
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/* face that supplies glyph metrics incrementally, after the face */
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/* object has been created */
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/* */
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/* <Input> */
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/* object :: a pointer to the user's data, specified by the 'object' */
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/* field in FT_Incremental_Interface */
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/* */
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/* index :: the glyph index */
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/* */
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/* vertical :: true for vertical layout, false for horizontal layout */
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/* */
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/* <Output> */
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/* metrics :: the glyph metrics in font units */
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/* */
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/* <Return> */
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/* a standard error code */
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/* */
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typedef FT_Error (*FT_Get_Glyph_Metrics_Func)(void* object,FT_UInt index,FT_Bool vertical,
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FT_Basic_Glyph_Metrics* metrics,FT_Bool* found);
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_Incremental_Interface_Funcs */
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/* */
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/* <Description> */
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/* A table of functions for accessing fonts that load data */
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/* incrementally. Used in FT_Incremental_Interface */
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/* */
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/* <Fields> */
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/* get_glyph_data :: The function to get glyph data. Must not be */
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/* null. */
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/* */
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/* get_glyph_metrics :: The function to get glyph metrics. May be */
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/* null if the font does not provide */
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/* overriding glyph metrics. */
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/* */
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typedef struct FT_Incremental_Interface_Funcs_
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{
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FT_Get_Glyph_Data_Func get_glyph_data;
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FT_Get_Glyph_Metrics_Func get_glyph_metrics;
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} FT_Incremental_Interface_Funcs;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_Incremental_Interface */
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/* */
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/* <Description> */
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/* This interface structure is provided to FT_Open_Face to allow */
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/* incremental faces to be opened. */
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/* */
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/* A incremental face supplies no glyph data when it is opened. */
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/* Instead the glyph data is supplied using a callback function. */
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/* Optionally, metrics that override the metrics in the typeface */
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/* data can also be supplied using another callback function. */
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/* */
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/* <Fields> */
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/* funcs :: The table of functions */
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/* */
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/* object :: The pointer passed to the functions. Usually it */
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/* points to the object from which glyph and metric */
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/* data is obtained. */
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/* */
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typedef struct FT_Incremental_Interface_
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{
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const FT_Incremental_Interface_Funcs* funcs;
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void* object;
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} FT_Incremental_Interface;
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/*************************************************************************/
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/*************************************************************************/
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@ -357,6 +357,26 @@ FT_BEGIN_HEADER
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} FT_Matrix;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FT_Data */
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/* */
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/* <Description> */
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/* Read-only binary data represented as a pointer and a length. */
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/* */
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/* <Fields> */
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/* pointer :: The data. */
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/* */
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/* length :: The length of the data in bytes. */
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/* */
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typedef struct FT_Data_
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{
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const FT_Byte* pointer;
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FT_Int length;
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} FT_Data;
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/*************************************************************************/
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/* */
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/* <FuncType> */
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