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freetype2/src/type1z/t1gload.h

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added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
/*******************************************************************
*
* t1gload.h 1.0
*
* Type1 Glyph Loader.
*
* Copyright 1996-1998 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.
*
*
* The Type 1 glyph loader uses three distinct objects to build
* scaled and hinted outlines from a charstrings program. These are :
*
* - a glyph builder, T1_Builder, used to store the built outline
*
* - a glyph hinter, T1_Hinter, used to record and apply the stem
* hints
*
* - a charstrings interpreter, T1_Decoder, used to parse the
* Type 1 charstrings stream, manage a stack and call the builder
* and/or hinter depending on the opcodes.
*
* Ideally, a Type 2 glyph loader would only need to have its own
* T2_Decoder object (assuming the hinter is able to manage all
* kinds of hints).
*
******************************************************************/
#ifndef T1GLOAD_H
#define T1GLOAD_H
#include <t1objs.h>
#ifdef __cplusplus
extern "C" {
#endif
/*************************************************************************/
/* */
/* <Structure> T1_Builder */
/* */
/* <Description> */
/* a structure used during glyph loading to store its outline. */
/* */
/* <Fields> */
/* system :: current system object */
/* face :: current face object */
/* glyph :: current glyph slot */
/* */
/* current :: current glyph outline */
/* base :: base glyph outline */
/* */
/* max_points :: maximum points in builder outline */
/* max_contours :: maximum contours in builder outline */
/* */
/* last :: last point position */
/* */
/* scale_x :: horizontal scale ( FUnits to sub-pixels ) */
/* scale_y :: vertical scale ( FUnits to sub-pixels ) */
/* pos_x :: horizontal translation (composite glyphs) */
/* pos_y :: vertical translation (composite glyph) */
/* */
/* left_bearing :: left side bearing point */
/* advance :: horizontal advance vector */
/* */
/* path_begun :: flag, indicates that a new path has begun */
/* load_points :: flag, if not set, no points are loaded */
/* */
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
/* error :: an error code that is only used to report */
/* memory allocation problems.. */
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
/* */
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
/* metrics_only :: a boolean indicating that we only want to */
/* compute the metrics of a given glyph, not load */
/* all of its points.. */
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
/* */
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
typedef struct T1_Builder_
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
{
FT_Memory memory;
T1_Face face;
T1_GlyphSlot glyph;
FT_Outline current; /* the current glyph outline */
FT_Outline base; /* the composite glyph outline */
T1_Int max_points; /* capacity of base outline in points */
T1_Int max_contours; /* capacity of base outline in contours */
T1_Vector last;
T1_Fixed scale_x;
T1_Fixed scale_y;
T1_Pos pos_x;
T1_Pos pos_y;
T1_Vector left_bearing;
T1_Vector advance;
T1_BBox bbox; /* bounding box */
T1_Bool path_begun;
T1_Bool load_points;
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
T1_Error error; /* only used for memory errors */
T1_Bool metrics_only;
} T1_Builder;
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
/* execution context charstring zone */
typedef struct T1_Decoder_Zone_
{
T1_Byte* base;
T1_Byte* limit;
T1_Byte* cursor;
} T1_Decoder_Zone;
typedef struct T1_Decoder_
{
T1_Builder builder;
T1_Int stack[ T1_MAX_CHARSTRINGS_OPERANDS ];
T1_Int* top;
T1_Decoder_Zone zones[ T1_MAX_SUBRS_CALLS+1 ];
T1_Decoder_Zone* zone;
T1_Int flex_state;
T1_Int num_flex_vectors;
T1_Vector flex_vectors[7];
} T1_Decoder;
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
LOCAL_DEF
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
void T1_Init_Builder( T1_Builder* builder,
T1_Face face,
T1_Size size,
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
T1_GlyphSlot glyph );
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
LOCAL_DEF
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
void T1_Done_Builder( T1_Builder* builder );
The Type 1 experimental driver was updated - small reduction of the code size of "t1encode.c" - removed the hinter (not useful with the upcoming auto-hinter..) - updated "t1load.c" to reduce warnings with Visual C++ - considerably changed the glyph loader (it is simpler) Beware, this code is still experimental, and is _not_ debugged. I don't even guarantee that it works for now - David
2000-02-02 13:20:53 +01:00
LOCAL_DEF
void T1_Init_Decoder( T1_Decoder* decoder );
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
/* Compute the maximum advance width of a font through quick parsing */
LOCAL_DEF
T1_Error T1_Compute_Max_Advance( T1_Face face,
T1_Int *max_advance );
/* This function is exported, because it is used by the T1Dump utility */
a few fixes to get rid of unwanted compile-time warnings
2000-03-06 10:51:19 +01:00
LOCAL_DEF
added a new experimental Type 1 driver. This version sports several improvements compared to "src/type1". Briefly : - the postscript-like interpreter is now gone. We now perform pattern-matching to load our font content. The resultant code is much faster, smaller, and easier to maintain. For a more detailed description, see the comments at the start of "src/type1z/t1objs.c" - the glyph loader will be greatly simplified really soon, and the clumsy hinter will be ditched in favor of a more general auto-hinting module (when we get one). The goal is to strip down the Type1 driver to about 15-20 Kb. This is still an experimental version. It is added to the repository for archiving. You should not try to use it for now (it won't work because some crucial parts are _knowingly_ ignored for now !). Note that the "old" type1 driver will probably move to the "demos/src" directory, in order to show how one can replace one given font driver at runtime (and to provide the functionality of the "t1dump" program).
2000-01-27 15:02:04 +01:00
T1_Error T1_Parse_CharStrings( T1_Decoder* decoder,
T1_Byte* charstring_base,
T1_Int charstring_len,
T1_Int num_subrs,
T1_Byte** subrs_base,
T1_Int* subrs_len );
LOCAL_DEF
T1_Error T1_Load_Glyph( T1_GlyphSlot glyph,
T1_Size size,
T1_Int glyph_index,
T1_Int load_flags );
#ifdef __cplusplus
}
#endif
#endif /* T1GLOAD_H */