src/mesa/main/depth.h

   1 /* $Id: depth.h,v 1.3 1999/11/11 01:22:26 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   6  *
   7  * Copyright (C) 1999  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 #ifndef DEPTH_H
  29 #define DEPTH_H
  30
  31
  32 #include "types.h"
  33
  34
  35 /*
  36  * Return the address of the Z-buffer value for window coordinate (x,y):
  37  */
  38 #define Z_ADDRESS( CTX, X, Y )  \
  39             ((CTX)->Buffer->Depth + (CTX)->Buffer->Width * (Y) + (X))
  40
  41
  42
  43
  44 extern GLuint
  45 gl_depth_test_span_generic( GLcontext* ctx, GLuint n, GLint x, GLint y,
  46                             const GLdepth z[], GLubyte mask[] );
  47
  48 extern GLuint
  49 gl_depth_test_span_less( GLcontext* ctx, GLuint n, GLint x, GLint y,
  50                          const GLdepth z[], GLubyte mask[] );
  51
  52 extern GLuint
  53 gl_depth_test_span_greater( GLcontext* ctx, GLuint n, GLint x, GLint y,
  54                             const GLdepth z[], GLubyte mask[] );
  55
  56
  57
  58 extern void
  59 gl_depth_test_pixels_generic( GLcontext* ctx,
  60                               GLuint n, const GLint x[], const GLint y[],
  61                               const GLdepth z[], GLubyte mask[] );
  62
  63 extern void
  64 gl_depth_test_pixels_less( GLcontext* ctx,
  65                            GLuint n, const GLint x[], const GLint y[],
  66                            const GLdepth z[], GLubyte mask[] );
  67
  68 extern void
  69 gl_depth_test_pixels_greater( GLcontext* ctx,
  70                               GLuint n, const GLint x[], const GLint y[],
  71                               const GLdepth z[], GLubyte mask[] );
  72
  73
  74 extern void gl_read_depth_span_float( GLcontext* ctx,
  75                                       GLuint n, GLint x, GLint y,
  76                                       GLfloat depth[] );
  77
  78
  79 extern void gl_read_depth_span_int( GLcontext* ctx, GLuint n, GLint x, GLint y,
  80                                     GLdepth depth[] );
  81
  82
  83 extern void gl_alloc_depth_buffer( GLcontext* ctx );
  84
  85
  86 extern void gl_clear_depth_buffer( GLcontext* ctx );
  87
  88
  89
  90 extern void
  91 _mesa_ClearDepth( GLclampd depth );
  92
  93 extern void
  94 _mesa_DepthFunc( GLenum func );
  95
  96
  97 extern void
  98 _mesa_DepthMask( GLboolean flag );
  99
 100
 101 #endif