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Diffstat (limited to 'Build/source/libs/libttf/ttengine.h')
| -rw-r--r-- | Build/source/libs/libttf/ttengine.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/Build/source/libs/libttf/ttengine.h b/Build/source/libs/libttf/ttengine.h new file mode 100644 index 00000000000..e946d06ce2b --- /dev/null +++ b/Build/source/libs/libttf/ttengine.h @@ -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 */ |