1 /* 2 * Mesa 3-D graphics library 3 * 4 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included 14 * in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * 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