src/mesa/swrast/s_depth.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #ifndef S_DEPTH_H
  27 #define S_DEPTH_H
  28
  29
  30 #include "main/glheader.h"
  31 #include "s_span.h"
  32
  33 struct gl_context;
  34 struct gl_renderbuffer;
  35
  36
  37 extern GLuint
  38 _swrast_depth_test_span( struct gl_context *ctx, SWspan *span);
  39
  40 extern void
  41 _swrast_depth_clamp_span( struct gl_context *ctx, SWspan *span );
  42
  43 extern GLboolean
  44 _swrast_depth_bounds_test( struct gl_context *ctx, SWspan *span );
  45
  46
  47 extern void
  48 _swrast_read_depth_span_float( struct gl_context *ctx, struct gl_renderbuffer *rb,
  49                                GLint n, GLint x, GLint y, GLfloat depth[] );
  50
  51 extern void
  52 _swrast_clear_depth_buffer(struct gl_context *ctx);
  53
  54 extern void
  55 _swrast_clear_depth_stencil_buffer(struct gl_context *ctx);
  56
  57
  58 #endif