1 /* 2 * Mesa 3-D graphics library 3 * Version: 6.5.1 4 * 5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 26 #ifndef S_DEPTH_H 27 #define S_DEPTH_H 28 29 30 #include "main/glheader.h" 31 #include "s_span.h" 32 33 struct gl_context; 34 struct gl_renderbuffer; 35 36 37 extern GLuint 38 _swrast_depth_test_span( struct gl_context *ctx, SWspan *span); 39 40 extern void 41 _swrast_depth_clamp_span( struct gl_context *ctx, SWspan *span ); 42 43 extern GLboolean 44 _swrast_depth_bounds_test( struct gl_context *ctx, SWspan *span ); 45 46 47 extern void 48 _swrast_read_depth_span_float( struct gl_context *ctx, struct gl_renderbuffer *rb, 49 GLint n, GLint x, GLint y, GLfloat depth[] ); 50 51 extern void 52 _swrast_clear_depth_buffer(struct gl_context *ctx); 53 54 extern void 55 _swrast_clear_depth_stencil_buffer(struct gl_context *ctx); 56 57 58 #endif 59