| 0,0 → 1,127 |
|---|
| /******************************************************************* |
| * |
| * ttraster.h v 1.4 |
| * |
| * The FreeType glyph rasterizer. |
| * |
| * 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. |
| * |
| * NOTES: |
| * |
| * This version supports the following: |
| * |
| * - direct grayscaling |
| * - sub-banding |
| * - drop-out modes 4 and 5 |
| * - second pass for complete drop-out control (bitmap only) |
| * - variable precision |
| * |
| * |
| * Changes between 1.4 and 1.3: |
| * |
| * Mainly performance tunings: |
| * |
| * - Line_Down() and Bezier_Down() now use the functions Line_Up() |
| * and Bezier_Up() to do their work. |
| * - optimized Split_Bezier() |
| * - optimized linked lists used during sweeps |
| * |
| * Changes between 1.2 and 1.3: |
| * |
| * - made the engine optionaly re-entrant. Saves a lot |
| * of code for a moderate performance hit. |
| * |
| ******************************************************************/ |
| |
| #ifndef TTRASTER_H |
| #define TTRASTER_H |
| |
| #include "ttconfig.h" |
| #include "freetype.h" /* for TT_Outline */ |
| #include "ttengine.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* We provide two different builds of the scan-line converter */ |
| /* The static build uses global variables and isn't */ |
| /* re-entrant. */ |
| /* The indirect build is re-entrant but accesses all variables */ |
| /* indirectly. */ |
| /* */ |
| /* As a consequence, the indirect build is about 10% slower */ |
| /* than the static one on a _Pentium_ (this could get worse */ |
| /* on older processors), but the code size is reduced by */ |
| /* more than 30% ! */ |
| /* */ |
| /* The indirect build is now the default, defined in */ |
| /* ttconfig.h. Be careful if you experiment with this. */ |
| |
| /* Note also that, though its code can be re-entrant, the */ |
| /* component is always used in thread-safe mode. This is */ |
| /* simply due to the fact that we want to use a single */ |
| /* render pool (of 64 Kb), and not to waste memory. */ |
| |
| #ifdef TT_STATIC_RASTER |
| |
| #define RAS_ARGS /* void */ |
| #define RAS_ARG /* void */ |
| |
| #define RAS_VARS /* void */ |
| #define RAS_VAR /* void */ |
| |
| #else |
| |
| #define RAS_ARGS TRaster_Instance* raster, |
| #define RAS_ARG TRaster_Instance* raster |
| |
| #define RAS_VARS raster, |
| #define RAS_VAR raster |
| |
| #endif |
| |
| |
| struct TRaster_Instance_; |
| typedef struct TRaster_Instance_ TRaster_Instance; |
| |
| /* Render one glyph in the target bitmap, using drop-out control */ |
| /* mode 'scan'. */ |
| LOCAL_DEF |
| TT_Error Render_Glyph( RAS_ARGS TT_Outline* glyph, |
| TT_Raster_Map* target ); |
| |
| #ifdef TT_CONFIG_OPTION_GRAY_SCALING |
| /* Render one gray-level glyph in the target pixmap. */ |
| /* Palette points to an array of 5 colors used for the rendering. */ |
| /* Use NULL to reuse the last palette. Default is VGA graylevels. */ |
| LOCAL_DEF |
| TT_Error Render_Gray_Glyph( RAS_ARGS TT_Outline* glyph, |
| TT_Raster_Map* target, |
| Byte* palette ); |
| #endif |
| |
| /* Initialize rasterizer */ |
| LOCAL_DEF |
| TT_Error TTRaster_Init( PEngine_Instance engine ); |
| |
| /* Finalize it */ |
| LOCAL_DEF |
| TT_Error TTRaster_Done( PEngine_Instance engine ); |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* TTRASTER_H */ |
| |
| |
| /* END */ |