src/mesa/main/depth.h

   1 /* $Id: depth.h,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.1
   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
  29
  30
  31 #ifndef DEPTH_H
  32 #define DEPTH_H
  33
  34
  35 #include "types.h"
  36
  37
  38 /*
  39  * Return the address of the Z-buffer value for window coordinate (x,y):
  40  */
  41 #define Z_ADDRESS( CTX, X, Y )  \
  42             ((CTX)->Buffer->Depth + (CTX)->Buffer->Width * (Y) + (X))
  43
  44
  45
  46
  47 extern GLuint
  48 gl_depth_test_span_generic( GLcontext* ctx, GLuint n, GLint x, GLint y,
  49                             const GLdepth z[], GLubyte mask[] );
  50
  51 extern GLuint
  52 gl_depth_test_span_less( GLcontext* ctx, GLuint n, GLint x, GLint y,
  53                          const GLdepth z[], GLubyte mask[] );
  54
  55 extern GLuint
  56 gl_depth_test_span_greater( GLcontext* ctx, GLuint n, GLint x, GLint y,
  57                             const GLdepth z[], GLubyte mask[] );
  58
  59
  60
  61 extern void
  62 gl_depth_test_pixels_generic( GLcontext* ctx,
  63                               GLuint n, const GLint x[], const GLint y[],
  64                               const GLdepth z[], GLubyte mask[] );
  65
  66 extern void
  67 gl_depth_test_pixels_less( GLcontext* ctx,
  68                            GLuint n, const GLint x[], const GLint y[],
  69                            const GLdepth z[], GLubyte mask[] );
  70
  71 extern void
  72 gl_depth_test_pixels_greater( GLcontext* ctx,
  73                               GLuint n, const GLint x[], const GLint y[],
  74                               const GLdepth z[], GLubyte mask[] );
  75
  76
  77 extern void gl_read_depth_span_float( GLcontext* ctx,
  78                                       GLuint n, GLint x, GLint y,
  79                                       GLfloat depth[] );
  80
  81
  82 extern void gl_read_depth_span_int( GLcontext* ctx, GLuint n, GLint x, GLint y,
  83                                     GLdepth depth[] );
  84
  85
  86 extern void gl_alloc_depth_buffer( GLcontext* ctx );
  87
  88
  89 extern void gl_clear_depth_buffer( GLcontext* ctx );
  90
  91
  92 extern void gl_ClearDepth( GLcontext* ctx, GLclampd depth );
  93
  94 extern void gl_DepthFunc( GLcontext* ctx, GLenum func );
  95
  96 extern void gl_DepthMask( GLcontext* ctx, GLboolean flag );
  97
  98 #endif