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  1. /*
  2.  * Mesa 3-D graphics library
  3.  * Version:  6.5.1
  4.  *
  5.  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
  6.  *
  7.  * Permission is hereby granted, free of charge, to any person obtaining a
  8.  * copy of this software and associated documentation files (the "Software"),
  9.  * to deal in the Software without restriction, including without limitation
  10.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11.  * and/or sell copies of the Software, and to permit persons to whom the
  12.  * Software is furnished to do so, subject to the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice shall be included
  15.  * in all copies or substantial portions of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20.  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21.  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23.  */
  24.  
  25.  
  26. #ifndef S_DEPTH_H
  27. #define S_DEPTH_H
  28.  
  29.  
  30. #include "main/mtypes.h"
  31. #include "s_span.h"
  32.  
  33.  
  34. extern GLuint
  35. _swrast_depth_test_span( struct gl_context *ctx, SWspan *span);
  36.  
  37. extern void
  38. _swrast_depth_clamp_span( struct gl_context *ctx, SWspan *span );
  39.  
  40. extern GLboolean
  41. _swrast_depth_bounds_test( struct gl_context *ctx, SWspan *span );
  42.  
  43.  
  44. extern void
  45. _swrast_read_depth_span_float( struct gl_context *ctx, struct gl_renderbuffer *rb,
  46.                                GLint n, GLint x, GLint y, GLfloat depth[] );
  47.  
  48.  
  49. extern void
  50. _swrast_read_depth_span_uint( struct gl_context *ctx, struct gl_renderbuffer *rb,
  51.                               GLint n, GLint x, GLint y, GLuint depth[] );
  52.  
  53.  
  54. extern void
  55. _swrast_clear_depth_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb );
  56.  
  57.  
  58. #endif
  59.