1 /* $Id: depth.h,v 1.2 1996/09/15 14:19:16 brianp Exp $ */ 2 3 /* 4 * Mesa 3-D graphics library 5 * Version: 2.0 6 * Copyright (C) 1995-1996 Brian Paul 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public 19 * License along with this library; if not, write to the Free 20 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23 24 /* 25 * $Log: depth.h,v $ 26 * Revision 1.2 1996/09/15 14:19:16 brianp 27 * now use GLframebuffer and GLvisual 28 * 29 * Revision 1.1 1996/09/13 01:38:16 brianp 30 * Initial revision 31 * 32 */ 33 34 35 #ifndef DEPTH_H 36 #define DEPTH_H 37 38 39 #include "types.h" 40 41 42 /* 43 * Return the address of the Z-buffer value for window coordinate (x,y): 44 */ 45 #define Z_ADDRESS( CTX, X, Y ) \ 46 ((CTX)->Buffer->Depth + (CTX)->Buffer->Width * (Y) + (X)) 47 48 49 50 51 extern GLuint 52 gl_depth_test_span_generic( GLcontext* ctx, GLuint n, GLint x, GLint y, 53 const GLdepth z[], GLubyte mask[] ); 54 55 extern GLuint 56 gl_depth_test_span_less( GLcontext* ctx, GLuint n, GLint x, GLint y, 57 const GLdepth z[], GLubyte mask[] ); 58 59 extern GLuint 60 gl_depth_test_span_greater( GLcontext* ctx, GLuint n, GLint x, GLint y, 61 const GLdepth z[], GLubyte mask[] ); 62 63 64 65 extern void 66 gl_depth_test_pixels_generic( GLcontext* ctx, 67 GLuint n, const GLint x[], const GLint y[], 68 const GLdepth z[], GLubyte mask[] ); 69 70 extern void 71 gl_depth_test_pixels_less( GLcontext* ctx, 72 GLuint n, const GLint x[], const GLint y[], 73 const GLdepth z[], GLubyte mask[] ); 74 75 extern void 76 gl_depth_test_pixels_greater( GLcontext* ctx, 77 GLuint n, const GLint x[], const GLint y[], 78 const GLdepth z[], GLubyte mask[] ); 79 80 81 extern void gl_read_depth_span_float( GLcontext* ctx, 82 GLuint n, GLint x, GLint y, 83 GLfloat depth[] ); 84 85 86 extern void gl_read_depth_span_int( GLcontext* ctx, GLuint n, GLint x, GLint y, 87 GLdepth depth[] ); 88 89 90 extern void gl_alloc_depth_buffer( GLcontext* ctx ); 91 92 93 extern void gl_clear_depth_buffer( GLcontext* ctx ); 94 95 96 extern void gl_ClearDepth( GLcontext* ctx, GLclampd depth ); 97 extern void gl_DepthFunc( GLcontext* ctx, GLenum func ); 98 extern void gl_DepthMask( GLcontext* ctx, GLboolean flag ); 99 extern void gl_DepthRange( GLcontext* ctx, GLclampd nearval, GLclampd farval ); 100 101 #endif 102