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/ttraster.h
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+/*******************************************************************
+ *
+ *  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 */