| 0,0 → 1,115 |
|---|
| /******************************************************************* |
| * |
| * ttengine.h 1.1 |
| * |
| * Engine instance structure 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. |
| * |
| * New in 1.1 : |
| * |
| * - added the 'raster_lock' mutex field to synchronize |
| * scan-line conversion in thread-safe and re-entrant builds. |
| * |
| ******************************************************************/ |
| |
| #ifndef TTENGINE_H |
| #define TTENGINE_H |
| |
| #include "tttypes.h" |
| #include "ttconfig.h" |
| #include "freetype.h" |
| #include "ttmutex.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /********************************************************************/ |
| /* */ |
| /* The freetype engine instance structure. */ |
| /* */ |
| /* This structure holds all the data that is necessary to run */ |
| /* one instance of the freetype engine. It is needed to get a */ |
| /* completely re-entrant version of the library. */ |
| /* */ |
| /* The goal is to move _all_ component-specific variables, either */ |
| /* static or global in the structure; the component initializers */ |
| /* and finalizers will all be called with the address of a valid */ |
| /* TEngine_Instance. */ |
| /* */ |
| /********************************************************************/ |
| |
| struct TEngine_Instance_ |
| { |
| TMutex lock; /* engine lock */ |
| |
| void* list_free_elements; |
| |
| void* objs_face_class; /* the face cache class */ |
| void* objs_instance_class; /* the instance cache class */ |
| void* objs_execution_class; /* the context cache class */ |
| void* objs_glyph_class; /* the glyph cache class */ |
| |
| void* objs_face_cache; /* these caches are used to track */ |
| void* objs_exec_cache; /* the current face and execution */ |
| /* context objects */ |
| |
| void* file_component; /* ttfile implementation dependent */ |
| |
| TMutex raster_lock; /* mutex for this engine's render pool */ |
| void* raster_component; /* ttraster implementation depedent */ |
| Byte raster_palette[5]; /* gray-levels palette for anti-aliasing */ |
| |
| void* extension_component; /* extensions dependent */ |
| |
| #if 0 |
| TT_Glyph_Loader_Callback glCallback; /* glyph loader callback, if any */ |
| #endif |
| }; |
| |
| /* NOTE : The raster's lock is only acquired by the Render_Glyph and */ |
| /* Render_Gray_Glyph functions, which always release it on exit */ |
| /* They do not lock the engine mutex. This means you shouldn't */ |
| /* be concerned about deadlocks between the two mutexes, as these */ |
| /* should never appear.. */ |
| |
| typedef struct TEngine_Instance_ TEngine_Instance; |
| typedef TEngine_Instance* PEngine_Instance; |
| |
| |
| #ifdef TT_CONFIG_OPTION_THREAD_SAFE /* for re-entrant builds */ |
| |
| #define ENGINE_ARG TEngine_Instance* _engine |
| #define ENGINE_ARGS TEngine_Instance* _engine, |
| |
| #define ENGINE_VAR _engine |
| #define ENGINE_VARS _engine, |
| |
| #define ENGINE _engine |
| |
| #else /* for thread-safe builds */ |
| |
| #define ENGINE_ARG /* void */ |
| #define ENGINE_ARGS |
| |
| #define ENGINE_VAR |
| #define ENGINE_VARS |
| |
| #endif /* TT_CONFIG_OPTION_THREAD_SAFE */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* TTENGINE_H */ |
| |
| |
| /* END */ |