FreeType 1.31.1

2023-08-27 18:03:45 +02:00
commit 5edbb7a80a
454 changed files with 173977 additions and 0 deletions
--- a/lib/ttengine.h
+++ b/lib/ttengine.h
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+/*******************************************************************
+ *
+ *  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 */