1 /* $Id: depth.h,v 1.3 1999/11/11 01:22:26 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999 Brian Paul All Rights Reserved.
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:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
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.
36 * Return the address of the Z-buffer value for window coordinate (x,y):
38 #define Z_ADDRESS( CTX, X, Y ) \
39 ((CTX)->Buffer->Depth + (CTX)->Buffer->Width * (Y) + (X))
45 gl_depth_test_span_generic( GLcontext
* ctx
, GLuint n
, GLint x
, GLint y
,
46 const GLdepth z
[], GLubyte mask
[] );
49 gl_depth_test_span_less( GLcontext
* ctx
, GLuint n
, GLint x
, GLint y
,
50 const GLdepth z
[], GLubyte mask
[] );
53 gl_depth_test_span_greater( GLcontext
* ctx
, GLuint n
, GLint x
, GLint y
,
54 const GLdepth z
[], GLubyte mask
[] );
59 gl_depth_test_pixels_generic( GLcontext
* ctx
,
60 GLuint n
, const GLint x
[], const GLint y
[],
61 const GLdepth z
[], GLubyte mask
[] );
64 gl_depth_test_pixels_less( GLcontext
* ctx
,
65 GLuint n
, const GLint x
[], const GLint y
[],
66 const GLdepth z
[], GLubyte mask
[] );
69 gl_depth_test_pixels_greater( GLcontext
* ctx
,
70 GLuint n
, const GLint x
[], const GLint y
[],
71 const GLdepth z
[], GLubyte mask
[] );
74 extern void gl_read_depth_span_float( GLcontext
* ctx
,
75 GLuint n
, GLint x
, GLint y
,
79 extern void gl_read_depth_span_int( GLcontext
* ctx
, GLuint n
, GLint x
, GLint y
,
83 extern void gl_alloc_depth_buffer( GLcontext
* ctx
);
86 extern void gl_clear_depth_buffer( GLcontext
* ctx
);
91 _mesa_ClearDepth( GLclampd depth
);
94 _mesa_DepthFunc( GLenum func
);
98 _mesa_DepthMask( GLboolean flag
);