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
164
165
166
167
|
/*
* Copyright © 2012 Intel Corporation
*
* 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 (including the next
* paragraph) 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 "mtypes.h"
#include "context.h"
#include "glformats.h"
#include "macros.h"
#include "mfeatures.h"
#include "enums.h"
#include "fbobject.h"
#include "formatquery.h"
/* default implementation of QuerySamplesForFormat driverfunc, for
* non-multisample-capable drivers. */
size_t
_mesa_query_samples_for_format(struct gl_context *ctx, GLenum target,
GLenum internalFormat, int samples[16])
{
(void) target;
(void) internalFormat;
(void) ctx;
samples[0] = 1;
return 1;
}
void GLAPIENTRY
_mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname,
GLsizei bufSize, GLint *params)
{
GLint buffer[16];
GLsizei count = 0;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (!ctx->Extensions.ARB_internalformat_query) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetInternalformativ");
return;
}
assert(ctx->Driver.QuerySamplesForFormat != NULL);
/* The ARB_internalformat_query spec says:
*
* "If the <target> parameter to GetInternalformativ is not one of
* TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY or RENDERBUFFER
* then an INVALID_ENUM error is generated."
*/
switch (target) {
case GL_RENDERBUFFER:
break;
case GL_TEXTURE_2D_MULTISAMPLE:
case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
/* These enums are only valid if ARB_texture_multisample is supported */
if (_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_texture_multisample)
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetInternalformativ(target=%s)",
_mesa_lookup_enum_by_nr(target));
return;
}
/* The ARB_internalformat_query spec says:
*
* "If the <internalformat> parameter to GetInternalformativ is not
* color-, depth- or stencil-renderable, then an INVALID_ENUM error is
* generated."
*/
if (_mesa_base_fbo_format(ctx, internalformat) == 0) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetInternalformativ(internalformat=%s)",
_mesa_lookup_enum_by_nr(internalformat));
return;
}
/* The ARB_internalformat_query spec says:
*
* "If the <bufSize> parameter to GetInternalformativ is negative, then
* an INVALID_VALUE error is generated."
*/
if (bufSize < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glGetInternalformativ(target=%s)",
_mesa_lookup_enum_by_nr(target));
return;
}
switch (pname) {
case GL_SAMPLES:
count = ctx->Driver.QuerySamplesForFormat(ctx, target,
internalformat, buffer);
break;
case GL_NUM_SAMPLE_COUNTS: {
/* The driver can return 0, and we should pass that along to the
* application. The ARB decided that ARB_internalformat_query should
* behave as ARB_internalformat_query2 in this situation.
*
* The ARB_internalformat_query2 spec says:
*
* "- NUM_SAMPLE_COUNTS: The number of sample counts that would be
* returned by querying SAMPLES is returned in <params>.
* * If <internalformat> is not color-renderable,
* depth-renderable, or stencil-renderable (as defined in
* section 4.4.4), or if <target> does not support multiple
* samples (ie other than TEXTURE_2D_MULTISAMPLE,
* TEXTURE_2D_MULTISAMPLE_ARRAY, or RENDERBUFFER), 0 is
* returned."
*/
const size_t num_samples =
ctx->Driver.QuerySamplesForFormat(ctx, target, internalformat, buffer);
/* QuerySamplesForFormat writes some stuff to buffer, so we have to
* separately over-write it with the requested value.
*/
buffer[0] = (GLint) num_samples;
count = 1;
break;
}
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetInternalformativ(pname=%s)",
_mesa_lookup_enum_by_nr(pname));
return;
}
if (bufSize != 0 && params == NULL) {
/* Emit a warning to aid application debugging, but go ahead and do the
* memcpy (and probably crash) anyway.
*/
_mesa_warning(ctx,
"glGetInternalformativ(bufSize = %d, but params = NULL)",
bufSize);
}
/* Copy the data from the temporary buffer to the buffer supplied by the
* application. Clamp the size of the copy to the size supplied by the
* application.
*/
memcpy(params, buffer, MIN2(count, bufSize) * sizeof(GLint));
return;
}
|
