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/* $Id: depth.h,v 1.4 1999/11/24 18:48:31 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef DEPTH_H
#define DEPTH_H
#include "types.h"
/*
* Return the address of the Z-buffer value for window coordinate (x,y):
*/
#define Z_ADDRESS( CTX, X, Y ) \
((CTX)->DrawBuffer->Depth + (CTX)->DrawBuffer->Width * (Y) + (X))
extern GLuint
gl_depth_test_span_generic( GLcontext* ctx, GLuint n, GLint x, GLint y,
const GLdepth z[], GLubyte mask[] );
extern GLuint
gl_depth_test_span_less( GLcontext* ctx, GLuint n, GLint x, GLint y,
const GLdepth z[], GLubyte mask[] );
extern GLuint
gl_depth_test_span_greater( GLcontext* ctx, GLuint n, GLint x, GLint y,
const GLdepth z[], GLubyte mask[] );
extern void
gl_depth_test_pixels_generic( GLcontext* ctx,
GLuint n, const GLint x[], const GLint y[],
const GLdepth z[], GLubyte mask[] );
extern void
gl_depth_test_pixels_less( GLcontext* ctx,
GLuint n, const GLint x[], const GLint y[],
const GLdepth z[], GLubyte mask[] );
extern void
gl_depth_test_pixels_greater( GLcontext* ctx,
GLuint n, const GLint x[], const GLint y[],
const GLdepth z[], GLubyte mask[] );
extern void gl_read_depth_span_float( GLcontext* ctx,
GLuint n, GLint x, GLint y,
GLfloat depth[] );
extern void gl_read_depth_span_int( GLcontext* ctx, GLuint n, GLint x, GLint y,
GLdepth depth[] );
extern void gl_alloc_depth_buffer( GLcontext* ctx );
extern void gl_clear_depth_buffer( GLcontext* ctx );
extern void
_mesa_ClearDepth( GLclampd depth );
extern void
_mesa_DepthFunc( GLenum func );
extern void
_mesa_DepthMask( GLboolean flag );
#endif
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