src/mesa/main/depth.h

   1 /* $Id: depth.h,v 1.5 1999/12/10 19:09:22 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  * Immediate-mode API entrpoints
  37  */
  38
  39 extern void
  40 _mesa_ClearDepth( GLclampd depth );
  41
  42
  43 extern void
  44 _mesa_DepthFunc( GLenum func );
  45
  46
  47 extern void
  48 _mesa_DepthMask( GLboolean flag );
  49
  50
  51
  52
  53 /*
  54  * Return the address of the Z-buffer value for window coordinate (x,y):
  55  */
  56 #define Z_ADDRESS( CTX, X, Y )  \
  57             ((CTX)->DrawBuffer->Depth + (CTX)->DrawBuffer->Width * (Y) + (X))
  58
  59
  60
  61
  62 extern GLuint
  63 gl_depth_test_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
  64                             const GLdepth z[], GLubyte mask[] );
  65
  66 extern void
  67 gl_depth_test_pixels( GLcontext *ctx,
  68                       GLuint n, const GLint x[], const GLint y[],
  69                       const GLdepth z[], GLubyte mask[] );
  70
  71
  72 extern void
  73 gl_read_depth_span_float( GLcontext *ctx, GLuint n, GLint x, GLint y,
  74                           GLfloat depth[] );
  75
  76
  77 extern void
  78 gl_alloc_depth_buffer( GLcontext* ctx );
  79
  80
  81 extern void
  82 gl_clear_depth_buffer( GLcontext* ctx );
  83
  84
  85
  86 #endif