1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Mesa 3-D graphics library
* Version: 7.1
*
* Copyright (C) 1999-2007 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include "glheader.h"
#include "imports.h"
#include "context.h"
#include "depth.h"
#include "enums.h"
#include "macros.h"
#include "mtypes.h"
/**********************************************************************/
/***** API Functions *****/
/**********************************************************************/
void GLAPIENTRY
_mesa_ClearDepth( GLclampd depth )
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glClearDepth(%f)\n", depth);
ctx->Depth.Clear = CLAMP( depth, 0.0, 1.0 );
}
void GLAPIENTRY
_mesa_ClearDepthf( GLclampf depth )
{
_mesa_ClearDepth(depth);
}
void GLAPIENTRY
_mesa_DepthFunc( GLenum func )
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glDepthFunc %s\n", _mesa_lookup_enum_by_nr(func));
switch (func) {
case GL_LESS: /* (default) pass if incoming z < stored z */
case GL_GEQUAL:
case GL_LEQUAL:
case GL_GREATER:
case GL_NOTEQUAL:
case GL_EQUAL:
case GL_ALWAYS:
case GL_NEVER:
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glDepth.Func" );
return;
}
if (ctx->Depth.Func == func)
return;
FLUSH_VERTICES(ctx, _NEW_DEPTH);
ctx->Depth.Func = func;
if (ctx->Driver.DepthFunc)
ctx->Driver.DepthFunc( ctx, func );
}
void GLAPIENTRY
_mesa_DepthMask( GLboolean flag )
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glDepthMask %d\n", flag);
/*
* GL_TRUE indicates depth buffer writing is enabled (default)
* GL_FALSE indicates depth buffer writing is disabled
*/
if (ctx->Depth.Mask == flag)
return;
FLUSH_VERTICES(ctx, _NEW_DEPTH);
ctx->Depth.Mask = flag;
if (ctx->Driver.DepthMask)
ctx->Driver.DepthMask( ctx, flag );
}
/**
* Specified by the GL_EXT_depth_bounds_test extension.
*/
void GLAPIENTRY
_mesa_DepthBoundsEXT( GLclampd zmin, GLclampd zmax )
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glDepthBounds(%f, %f)\n", zmin, zmax);
if (zmin > zmax) {
_mesa_error(ctx, GL_INVALID_VALUE, "glDepthBoundsEXT(zmin > zmax)");
return;
}
zmin = CLAMP(zmin, 0.0, 1.0);
zmax = CLAMP(zmax, 0.0, 1.0);
if (ctx->Depth.BoundsMin == zmin && ctx->Depth.BoundsMax == zmax)
return;
FLUSH_VERTICES(ctx, _NEW_DEPTH);
ctx->Depth.BoundsMin = (GLfloat) zmin;
ctx->Depth.BoundsMax = (GLfloat) zmax;
}
/**********************************************************************/
/***** Initialization *****/
/**********************************************************************/
/**
* Initialize the depth buffer attribute group in the given context.
*/
void
_mesa_init_depth(struct gl_context *ctx)
{
ctx->Depth.Test = GL_FALSE;
ctx->Depth.Clear = 1.0;
ctx->Depth.Func = GL_LESS;
ctx->Depth.Mask = GL_TRUE;
}
|
