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| FT_OpenType_Validate | ||
| FT_OpenType_Free | FT_VALIDATE_OTXXX | 
This section contains the declaration of functions to validate some OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).
Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).
FT_EXPORT( FT_Error ) FT_OpenType_Validate( FT_Face face, FT_UInt validation_flags, FT_Bytes *BASE_table, FT_Bytes *GDEF_table, FT_Bytes *GPOS_table, FT_Bytes *GSUB_table, FT_Bytes *JSTF_table );
Validate various OpenType tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).
| face | A handle to the input face. | 
| validation_flags | A bit field that specifies the tables to be validated. See FT_VALIDATE_OTXXX for possible values. | 
| BASE_table | A pointer to the BASE table. | 
| GDEF_table | A pointer to the GDEF table. | 
| GPOS_table | A pointer to the GPOS table. | 
| GSUB_table | A pointer to the GSUB table. | 
| JSTF_table | A pointer to the JSTF table. | 
FreeType error code. 0 means success.
This function only works with OpenType fonts, returning an error otherwise.
After use, the application should deallocate the five tables with FT_OpenType_Free. A NULL value indicates that the table either doesn't exist in the font, or the application hasn't asked for validation.
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Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).
FT_EXPORT( void ) FT_OpenType_Free( FT_Face face, FT_Bytes table );
Free the buffer allocated by OpenType validator.
| face | A handle to the input face. | 
| table | The pointer to the buffer that is allocated by FT_OpenType_Validate. | 
This function must be used to free the buffer allocated by FT_OpenType_Validate only.
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Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).
#define FT_VALIDATE_BASE 0x0100 #define FT_VALIDATE_GDEF 0x0200 #define FT_VALIDATE_GPOS 0x0400 #define FT_VALIDATE_GSUB 0x0800 #define FT_VALIDATE_JSTF 0x1000 #define FT_VALIDATE_MATH 0x2000 #define FT_VALIDATE_OT ( FT_VALIDATE_BASE | \ FT_VALIDATE_GDEF | \ FT_VALIDATE_GPOS | \ FT_VALIDATE_GSUB | \ FT_VALIDATE_JSTF | \ FT_VALIDATE_MATH )
A list of bit-field constants used with FT_OpenType_Validate to indicate which OpenType tables should be validated.
| FT_VALIDATE_BASE | Validate BASE table. | 
| FT_VALIDATE_GDEF | Validate GDEF table. | 
| FT_VALIDATE_GPOS | Validate GPOS table. | 
| FT_VALIDATE_GSUB | Validate GSUB table. | 
| FT_VALIDATE_JSTF | Validate JSTF table. | 
| FT_VALIDATE_MATH | Validate MATH table. | 
| FT_VALIDATE_OT | Validate all OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH). | 
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