kc3-lang/freetype/src/type1/t1objs.h
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Hash : f0df85ba
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Date : 2000-06-22T00:17:42
- MAJOR INTERNAL REDESIGN: A lot of internal modifications have been performed lately on the source in order to provide the following enhancements: - more generic module support: The FT_Module type is now defined to represent a handle to a given module. The file <freetype/ftmodule.h> contains the FT_Module_Class definition, as well as the module-loading public API The FT_Driver type is still defined, and still represents a pointer to a font driver. Note that FT_Add_Driver is replaced by FT_Add_Module, FT_Get_Driver by FT_Get_Module, etc.. - support for generic glyph image types: The FT_Renderer type is a pointer to a module used to perform various operations on glyph image. Each renderer is capable of handling images in a single format (e.g. ft_glyph_format_outline). Its functions are used to: - transform an glyph image - render a glyph image into a bitmap - return the control box (dimensions) of a given glyph image The scan converters "ftraster.c" and "ftgrays.c" have been moved to the new directory "src/renderer", and are used to provide two default renderer modules. One corresponds to the "standard" scan-converter, the other to the "smooth" one. The current renderer can be set through the new function FT_Set_Renderer. The old raster-related function FT_Set_Raster, FT_Get_Raster and FT_Set_Raster_Mode have now disappeared, in favor of the new: FT_Get_Renderer FT_Set_Renderer see the file <freetype/ftrender.h> for more details.. These changes were necessary to properly support different scalable formats in the future, like bi-color glyphs, etc.. - glyph loader object: A new internal object, called a 'glyph loader' has been introduced in the base layer. It is used by all scalable format font drivers to load glyphs and composites. This object has been created to reduce the code size of each driver, as each one of them basically re-implemented its functionality. See <freetype/internal/ftobjs.h> and the FT_GlyphLoader type for more information.. - FT_GlyphSlot had new fields: In order to support extended features (see below), the FT_GlyphSlot structure has a few new fields: linearHoriAdvance: this field gives the linearly scaled (i.e. scaled but unhinted) advance width for the glyph, expressed as a 16.16 fixed pixel value. This is useful to perform WYSIWYG text. linearVertAdvance: this field gives the linearly scaled advance height for the glyph (relevant in vertical glyph layouts only). This is useful to perform WYSIWYG text. Note that the two above field replace the removed "metrics2" field in the glyph slot. advance: this field is a vector that gives the transformed advance for the glyph. By default, it corresponds to the advance width, unless FT_LOAD_VERTICAL_LAYOUT was specified when calling FT_Load_Glyph or FT_Load_Char bitmap_left: this field gives the distance in integer pixels from the current pen position to the left-most pixel of a glyph image WHEN IT IS A BITMAP. It is only valid when the "format" field is set to "ft_glyph_format_bitmap", for example, after calling the new function FT_Render_Glyph. bitmap_top: this field gives the distance in integer pixels from the current pen position (located on the baseline) to the top-most pixel of the glyph image WHEN IT IS A BITMAP. Positive values correspond to upwards Y. loader: this is a new private field for the glyph slot. Client applications should not touch it.. - support for transforms and direct rendering in FT_Load_Glyph: Most of the functionality found in <freetype/ftglyph.h> has been moved to the core library. Hence, the following: - a transform can be specified for a face through FT_Set_Transform. this transform is applied by FT_Load_Glyph to scalable glyph images (i.e. NOT TO BITMAPS) before the function returns, unless the bit flag FT_LOAD_IGNORE_TRANSFORM was set in the load flags.. - once a glyph image has been loaded, it can be directly converted to a bitmap by using the new FT_Render_Glyph function. Note that this function takes the glyph image from the glyph slot, and converts it to a bitmap whose properties are returned in "face.glyph.bitmap", "face.glyph.bitmap_left" and "face.glyph.bitmap_top". The original native image might be lost after the conversion. - when using the new bit flag FT_LOAD_RENDER, the FT_Load_Glyph and FT_Load_Char functions will call FT_Render_Glyph automatically when needed.
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src/type1/t1objs.h
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/******************************************************************* * * t1objs.h 1.0 * * Type1 objects definition. * * Copyright 1996-1999 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 T1OBJS_H #define T1OBJS_H #include <freetype/config/ftconfig.h> #include <freetype/internal/ftobjs.h> #include <freetype/internal/t1types.h> #include <freetype/internal/t1errors.h> #ifdef __cplusplus extern "C" { #endif /* The following structures must be defined by the hinter */ typedef struct T1_Size_Hints_ T1_Size_Hints; typedef struct T1_Glyph_Hints_ T1_Glyph_Hints; /***********************************************************************/ /* */ /* <Type> T1_Driver */ /* */ /* <Description> */ /* A handle to a Type 1 driver object. */ /* */ typedef struct T1_DriverRec_ *T1_Driver; /***********************************************************************/ /* */ /* <Type> T1_Size */ /* */ /* <Description> */ /* A handle to a Type 1 size object. */ /* */ typedef struct T1_SizeRec_* T1_Size; /***********************************************************************/ /* */ /* <Type> T1_GlyphSlot */ /* */ /* <Description> */ /* A handle to a Type 1 glyph slot object. */ /* */ typedef struct T1_GlyphSlotRec_* T1_GlyphSlot; /***********************************************************************/ /* */ /* <Type> T1_CharMap */ /* */ /* <Description> */ /* A handle to a Type 1 character mapping object. */ /* */ /* <Note> */ /* The Type 1 format doesn't use a charmap but an encoding table. */ /* The driver is responsible for making up charmap objects */ /* corresponding to these tables.. */ /* */ typedef struct T1_CharMapRec_* T1_CharMap; /**************************************************************************/ /* */ /* NOW BEGINS THE TYPE1 SPECIFIC STUFF .............................. */ /* */ /**************************************************************************/ /***************************************************/ /* */ /* T1_Size : */ /* */ /* Type 1 size record.. */ /* */ typedef struct T1_SizeRec_ { FT_SizeRec root; FT_Bool valid; T1_Size_Hints* hints; /* defined in the hinter. This allows */ /* us to experiment with different */ /* hinting schemes without having to */ /* change 't1objs' each time.. */ } T1_SizeRec; /***************************************************/ /* */ /* T1_GlyphSlot : */ /* */ /* TrueDoc glyph record.. */ /* */ typedef struct T1_GlyphSlotRec_ { FT_GlyphSlotRec root; FT_Bool hint; FT_Bool scaled; FT_Int max_points; FT_Int max_contours; FT_Fixed x_scale; FT_Fixed y_scale; T1_Glyph_Hints* hints; /* defined in the hinter */ } T1_GlyphSlotRec; /******************************************************************* * * <Function> T1_Init_Face * * <Description> * Initialise a given Type 1 face object * * <Input> * face_index :: index of font face in resource * resource :: source font resource * face :: face record to build * * <Return> * Error code. * ******************************************************************/ LOCAL_DEF FT_Error T1_Init_Face( FT_Stream stream, T1_Face face, FT_Int face_index, FT_Int num_params, FT_Parameter* params ); /******************************************************************* * * <Function> T1_Done_Face * * <Description> * Finalise a given face object * * <Input> * face :: handle to the face object to destroy * ******************************************************************/ LOCAL_DEF void T1_Done_Face( T1_Face face ); /******************************************************************* * * <Function> T1_Init_Size * * <Description> * Initialise a new Type 1 size object * * <Input> * size :: handle to size object * * <Return> * Type 1 error code. 0 means success. * ******************************************************************/ LOCAL_DEF FT_Error T1_Init_Size( T1_Size size ); /******************************************************************* * * <Function> T1_Done_Size * * <Description> * The Type 1 size object finaliser. * * <Input> * size :: handle to the target size object. * ******************************************************************/ LOCAL_DEF void T1_Done_Size( T1_Size size ); /******************************************************************* * * <Function> T1_Reset_Size * * <Description> * Reset a Type 1 size when resolutions and character dimensions * have been changed.. * * <Input> * size :: handle to the target size object. * ******************************************************************/ LOCAL_DEF FT_Error T1_Reset_Size( T1_Size size ); /******************************************************************* * * <Function> T1_Init_GlyphSlot * * <Description> The TrueType glyph slot initialiser * * <Input> glyph :: glyph record to build. * * <Output> Error code. * ******************************************************************/ LOCAL_DEF FT_Error T1_Init_GlyphSlot( T1_GlyphSlot slot ); /******************************************************************* * * <Function> T1_Done_GlyphSlot * * <Description> The Type 1 glyph slot finaliser * * <Input> glyph :: handle to glyph slot object * * <Output> Error code. * ******************************************************************/ LOCAL_DEF void T1_Done_GlyphSlot( T1_GlyphSlot slot ); #ifdef __cplusplus } #endif #endif /* T1OBJS_H */ /* END */