src/mesa/main/depth.h

   1
   2 /* $Id: depth.h,v 1.2 1999/10/08 09:27:10 keithw Exp $ */
   3
   4 /*
   5  * Mesa 3-D graphics library
   6  * Version:  3.1
   7  *
   8  * Copyright (C) 1999  Brian Paul   All Rights Reserved.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a
  11  * copy of this software and associated documentation files (the "Software"),
  12  * to deal in the Software without restriction, including without limitation
  13  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14  * and/or sell copies of the Software, and to permit persons to whom the
  15  * Software is furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included
  18  * in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  24  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  25  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28
  29
  30
  31
  32 #ifndef DEPTH_H
  33 #define DEPTH_H
  34
  35
  36 #include "types.h"
  37
  38
  39 /*
  40  * Return the address of the Z-buffer value for window coordinate (x,y):
  41  */
  42 #define Z_ADDRESS( CTX, X, Y )  \
  43             ((CTX)->Buffer->Depth + (CTX)->Buffer->Width * (Y) + (X))
  44
  45
  46
  47
  48 extern GLuint
  49 gl_depth_test_span_generic( GLcontext* ctx, GLuint n, GLint x, GLint y,
  50                             const GLdepth z[], GLubyte mask[] );
  51
  52 extern GLuint
  53 gl_depth_test_span_less( GLcontext* ctx, GLuint n, GLint x, GLint y,
  54                          const GLdepth z[], GLubyte mask[] );
  55
  56 extern GLuint
  57 gl_depth_test_span_greater( GLcontext* ctx, GLuint n, GLint x, GLint y,
  58                             const GLdepth z[], GLubyte mask[] );
  59
  60
  61
  62 extern void
  63 gl_depth_test_pixels_generic( GLcontext* ctx,
  64                               GLuint n, const GLint x[], const GLint y[],
  65                               const GLdepth z[], GLubyte mask[] );
  66
  67 extern void
  68 gl_depth_test_pixels_less( GLcontext* ctx,
  69                            GLuint n, const GLint x[], const GLint y[],
  70                            const GLdepth z[], GLubyte mask[] );
  71
  72 extern void
  73 gl_depth_test_pixels_greater( GLcontext* ctx,
  74                               GLuint n, const GLint x[], const GLint y[],
  75                               const GLdepth z[], GLubyte mask[] );
  76
  77
  78 extern void gl_read_depth_span_float( GLcontext* ctx,
  79                                       GLuint n, GLint x, GLint y,
  80                                       GLfloat depth[] );
  81
  82
  83 extern void gl_read_depth_span_int( GLcontext* ctx, GLuint n, GLint x, GLint y,
  84                                     GLdepth depth[] );
  85
  86
  87 extern void gl_alloc_depth_buffer( GLcontext* ctx );
  88
  89
  90 extern void gl_clear_depth_buffer( GLcontext* ctx );
  91
  92
  93 extern void gl_ClearDepth( GLcontext* ctx, GLclampd depth );
  94
  95 extern void gl_DepthFunc( GLcontext* ctx, GLenum func );
  96
  97 extern void gl_DepthMask( GLcontext* ctx, GLboolean flag );
  98
  99 #endif