1 /**************************************************************************
3 * Copyright 2008 VMware, Inc.
4 * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
5 * Copyright 2010-2011 LunarG, Inc.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
28 **************************************************************************/
32 * EGL Configuration (pixel format) functions.
39 #include "c99_compat.h"
41 #include "eglconfig.h"
42 #include "egldisplay.h"
43 #include "eglcurrent.h"
50 * Init the given _EGLconfig to default values.
51 * \param id the configuration's ID.
53 * Note that id must be positive for the config to be valid.
54 * It is also recommended that when there are N configs, their
55 * IDs are from 1 to N respectively.
58 _eglInitConfig(_EGLConfig
*conf
, _EGLDisplay
*dpy
, EGLint id
)
60 memset(conf
, 0, sizeof(*conf
));
64 /* some attributes take non-zero default values */
66 conf
->ConfigCaveat
= EGL_NONE
;
67 conf
->TransparentType
= EGL_NONE
;
68 conf
->NativeVisualType
= EGL_NONE
;
69 conf
->ColorBufferType
= EGL_RGB_BUFFER
;
74 * Link a config to its display and return the handle of the link.
75 * The handle can be passed to client directly.
77 * Note that we just save the ptr to the config (we don't copy the config).
80 _eglLinkConfig(_EGLConfig
*conf
)
82 _EGLDisplay
*dpy
= conf
->Display
;
86 assert(conf
->ConfigID
> 0);
89 dpy
->Configs
= _eglCreateArray("Config", 16);
91 return (EGLConfig
) NULL
;
94 _eglAppendArray(dpy
->Configs
, (void *) conf
);
96 return (EGLConfig
) conf
;
101 * Lookup a handle to find the linked config.
102 * Return NULL if the handle has no corresponding linked config.
105 _eglLookupConfig(EGLConfig config
, _EGLDisplay
*dpy
)
112 conf
= (_EGLConfig
*) _eglFindArray(dpy
->Configs
, (void *) config
);
114 assert(conf
->Display
== dpy
);
126 ATTRIB_TYPE_PSEUDO
, /* non-queryable */
127 ATTRIB_TYPE_PLATFORM
, /* platform-dependent */
129 ATTRIB_CRITERION_EXACT
,
130 ATTRIB_CRITERION_ATLEAST
,
131 ATTRIB_CRITERION_MASK
,
132 ATTRIB_CRITERION_SPECIAL
,
133 ATTRIB_CRITERION_IGNORE
137 /* EGL spec Table 3.1 and 3.4 */
138 static const struct {
142 EGLint default_value
;
143 } _eglValidationTable
[] =
146 { EGL_BUFFER_SIZE
, ATTRIB_TYPE_INTEGER
,
147 ATTRIB_CRITERION_ATLEAST
,
149 { EGL_RED_SIZE
, ATTRIB_TYPE_INTEGER
,
150 ATTRIB_CRITERION_ATLEAST
,
152 { EGL_GREEN_SIZE
, ATTRIB_TYPE_INTEGER
,
153 ATTRIB_CRITERION_ATLEAST
,
155 { EGL_BLUE_SIZE
, ATTRIB_TYPE_INTEGER
,
156 ATTRIB_CRITERION_ATLEAST
,
158 { EGL_LUMINANCE_SIZE
, ATTRIB_TYPE_INTEGER
,
159 ATTRIB_CRITERION_ATLEAST
,
161 { EGL_ALPHA_SIZE
, ATTRIB_TYPE_INTEGER
,
162 ATTRIB_CRITERION_ATLEAST
,
164 { EGL_ALPHA_MASK_SIZE
, ATTRIB_TYPE_INTEGER
,
165 ATTRIB_CRITERION_ATLEAST
,
167 { EGL_BIND_TO_TEXTURE_RGB
, ATTRIB_TYPE_BOOLEAN
,
168 ATTRIB_CRITERION_EXACT
,
170 { EGL_BIND_TO_TEXTURE_RGBA
, ATTRIB_TYPE_BOOLEAN
,
171 ATTRIB_CRITERION_EXACT
,
173 { EGL_COLOR_BUFFER_TYPE
, ATTRIB_TYPE_ENUM
,
174 ATTRIB_CRITERION_EXACT
,
176 { EGL_CONFIG_CAVEAT
, ATTRIB_TYPE_ENUM
,
177 ATTRIB_CRITERION_EXACT
,
179 { EGL_CONFIG_ID
, ATTRIB_TYPE_INTEGER
,
180 ATTRIB_CRITERION_EXACT
,
182 { EGL_CONFORMANT
, ATTRIB_TYPE_BITMASK
,
183 ATTRIB_CRITERION_MASK
,
185 { EGL_DEPTH_SIZE
, ATTRIB_TYPE_INTEGER
,
186 ATTRIB_CRITERION_ATLEAST
,
188 { EGL_LEVEL
, ATTRIB_TYPE_PLATFORM
,
189 ATTRIB_CRITERION_EXACT
,
191 { EGL_MAX_PBUFFER_WIDTH
, ATTRIB_TYPE_INTEGER
,
192 ATTRIB_CRITERION_IGNORE
,
194 { EGL_MAX_PBUFFER_HEIGHT
, ATTRIB_TYPE_INTEGER
,
195 ATTRIB_CRITERION_IGNORE
,
197 { EGL_MAX_PBUFFER_PIXELS
, ATTRIB_TYPE_INTEGER
,
198 ATTRIB_CRITERION_IGNORE
,
200 { EGL_MAX_SWAP_INTERVAL
, ATTRIB_TYPE_INTEGER
,
201 ATTRIB_CRITERION_EXACT
,
203 { EGL_MIN_SWAP_INTERVAL
, ATTRIB_TYPE_INTEGER
,
204 ATTRIB_CRITERION_EXACT
,
206 { EGL_NATIVE_RENDERABLE
, ATTRIB_TYPE_BOOLEAN
,
207 ATTRIB_CRITERION_EXACT
,
209 { EGL_NATIVE_VISUAL_ID
, ATTRIB_TYPE_PLATFORM
,
210 ATTRIB_CRITERION_IGNORE
,
212 { EGL_NATIVE_VISUAL_TYPE
, ATTRIB_TYPE_PLATFORM
,
213 ATTRIB_CRITERION_EXACT
,
215 { EGL_RENDERABLE_TYPE
, ATTRIB_TYPE_BITMASK
,
216 ATTRIB_CRITERION_MASK
,
218 { EGL_SAMPLE_BUFFERS
, ATTRIB_TYPE_INTEGER
,
219 ATTRIB_CRITERION_ATLEAST
,
221 { EGL_SAMPLES
, ATTRIB_TYPE_INTEGER
,
222 ATTRIB_CRITERION_ATLEAST
,
224 { EGL_STENCIL_SIZE
, ATTRIB_TYPE_INTEGER
,
225 ATTRIB_CRITERION_ATLEAST
,
227 { EGL_SURFACE_TYPE
, ATTRIB_TYPE_BITMASK
,
228 ATTRIB_CRITERION_MASK
,
230 { EGL_TRANSPARENT_TYPE
, ATTRIB_TYPE_ENUM
,
231 ATTRIB_CRITERION_EXACT
,
233 { EGL_TRANSPARENT_RED_VALUE
, ATTRIB_TYPE_INTEGER
,
234 ATTRIB_CRITERION_EXACT
,
236 { EGL_TRANSPARENT_GREEN_VALUE
, ATTRIB_TYPE_INTEGER
,
237 ATTRIB_CRITERION_EXACT
,
239 { EGL_TRANSPARENT_BLUE_VALUE
, ATTRIB_TYPE_INTEGER
,
240 ATTRIB_CRITERION_EXACT
,
242 { EGL_MATCH_NATIVE_PIXMAP
, ATTRIB_TYPE_PSEUDO
,
243 ATTRIB_CRITERION_SPECIAL
,
246 { EGL_Y_INVERTED_NOK
, ATTRIB_TYPE_BOOLEAN
,
247 ATTRIB_CRITERION_EXACT
,
249 { EGL_FRAMEBUFFER_TARGET_ANDROID
, ATTRIB_TYPE_BOOLEAN
,
250 ATTRIB_CRITERION_EXACT
,
252 { EGL_RECORDABLE_ANDROID
, ATTRIB_TYPE_BOOLEAN
,
253 ATTRIB_CRITERION_EXACT
,
259 * Return true if a config is valid. When for_matching is true,
260 * EGL_DONT_CARE is accepted as a valid attribute value, and checks
261 * for conflicting attribute values are skipped.
263 * Note that some attributes are platform-dependent and are not
267 _eglValidateConfig(const _EGLConfig
*conf
, EGLBoolean for_matching
)
270 EGLBoolean valid
= EGL_TRUE
;
272 /* check attributes by their types */
273 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
276 attr
= _eglValidationTable
[i
].attr
;
277 val
= _eglGetConfigKey(conf
, attr
);
279 switch (_eglValidationTable
[i
].type
) {
280 case ATTRIB_TYPE_INTEGER
:
283 /* config id must be positive */
287 case EGL_SAMPLE_BUFFERS
:
288 /* there can be at most 1 sample buffer */
289 if (val
> 1 || val
< 0)
298 case ATTRIB_TYPE_BOOLEAN
:
299 if (val
!= EGL_TRUE
&& val
!= EGL_FALSE
)
302 case ATTRIB_TYPE_ENUM
:
304 case EGL_CONFIG_CAVEAT
:
305 if (val
!= EGL_NONE
&& val
!= EGL_SLOW_CONFIG
&&
306 val
!= EGL_NON_CONFORMANT_CONFIG
)
309 case EGL_TRANSPARENT_TYPE
:
310 if (val
!= EGL_NONE
&& val
!= EGL_TRANSPARENT_RGB
)
313 case EGL_COLOR_BUFFER_TYPE
:
314 if (val
!= EGL_RGB_BUFFER
&& val
!= EGL_LUMINANCE_BUFFER
)
322 case ATTRIB_TYPE_BITMASK
:
324 case EGL_SURFACE_TYPE
:
325 mask
= EGL_PBUFFER_BIT
|
328 EGL_VG_COLORSPACE_LINEAR_BIT
|
329 EGL_VG_ALPHA_FORMAT_PRE_BIT
|
330 EGL_MULTISAMPLE_RESOLVE_BOX_BIT
|
331 EGL_SWAP_BEHAVIOR_PRESERVED_BIT
;
333 case EGL_RENDERABLE_TYPE
:
335 mask
= EGL_OPENGL_ES_BIT
|
338 EGL_OPENGL_ES3_BIT_KHR
|
349 case ATTRIB_TYPE_PLATFORM
:
350 /* unable to check platform-dependent attributes here */
352 case ATTRIB_TYPE_PSEUDO
:
353 /* pseudo attributes should not be set */
362 if (!valid
&& for_matching
) {
363 /* accept EGL_DONT_CARE as a valid value */
364 if (val
== EGL_DONT_CARE
)
366 if (_eglValidationTable
[i
].criterion
== ATTRIB_CRITERION_SPECIAL
)
371 "attribute 0x%04x has an invalid value 0x%x", attr
, val
);
376 /* any invalid attribute value should have been catched */
377 if (!valid
|| for_matching
)
380 /* now check for conflicting attribute values */
382 switch (conf
->ColorBufferType
) {
384 if (conf
->LuminanceSize
)
386 if (conf
->RedSize
+ conf
->GreenSize
+
387 conf
->BlueSize
+ conf
->AlphaSize
!= conf
->BufferSize
)
390 case EGL_LUMINANCE_BUFFER
:
391 if (conf
->RedSize
|| conf
->GreenSize
|| conf
->BlueSize
)
393 if (conf
->LuminanceSize
+ conf
->AlphaSize
!= conf
->BufferSize
)
398 _eglLog(_EGL_DEBUG
, "conflicting color buffer type and channel sizes");
402 if (!conf
->SampleBuffers
&& conf
->Samples
)
405 _eglLog(_EGL_DEBUG
, "conflicting samples and sample buffers");
409 if (!(conf
->SurfaceType
& EGL_WINDOW_BIT
)) {
410 if (conf
->NativeVisualID
!= 0 || conf
->NativeVisualType
!= EGL_NONE
)
413 if (!(conf
->SurfaceType
& EGL_PBUFFER_BIT
)) {
414 if (conf
->BindToTextureRGB
|| conf
->BindToTextureRGBA
)
418 _eglLog(_EGL_DEBUG
, "conflicting surface type and native visual/texture binding");
427 * Return true if a config matches the criteria. This and
428 * _eglParseConfigAttribList together implement the algorithm
429 * described in "Selection of EGLConfigs".
431 * Note that attributes that are special (currently, only
432 * EGL_MATCH_NATIVE_PIXMAP) are ignored.
435 _eglMatchConfig(const _EGLConfig
*conf
, const _EGLConfig
*criteria
)
438 EGLBoolean matched
= EGL_TRUE
;
440 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
442 if (_eglValidationTable
[i
].criterion
== ATTRIB_CRITERION_IGNORE
)
445 attr
= _eglValidationTable
[i
].attr
;
446 cmp
= _eglGetConfigKey(criteria
, attr
);
447 if (cmp
== EGL_DONT_CARE
)
450 val
= _eglGetConfigKey(conf
, attr
);
451 switch (_eglValidationTable
[i
].criterion
) {
452 case ATTRIB_CRITERION_EXACT
:
456 case ATTRIB_CRITERION_ATLEAST
:
460 case ATTRIB_CRITERION_MASK
:
461 if ((val
& cmp
) != cmp
)
464 case ATTRIB_CRITERION_SPECIAL
:
474 /* only print the common errors when DEBUG is not defined */
475 if (attr
!= EGL_RENDERABLE_TYPE
)
479 "the value (0x%x) of attribute 0x%04x did not meet the criteria (0x%x)",
488 static inline EGLBoolean
489 _eglIsConfigAttribValid(_EGLConfig
*conf
, EGLint attr
)
491 if (_eglOffsetOfConfig(attr
) < 0)
495 case EGL_Y_INVERTED_NOK
:
496 return conf
->Display
->Extensions
.NOK_texture_from_pixmap
;
497 case EGL_FRAMEBUFFER_TARGET_ANDROID
:
498 return conf
->Display
->Extensions
.ANDROID_framebuffer_target
;
499 case EGL_RECORDABLE_ANDROID
:
500 return conf
->Display
->Extensions
.ANDROID_recordable
;
509 * Initialize a criteria config from the given attribute list.
510 * Return EGL_FALSE if any of the attribute is invalid.
513 _eglParseConfigAttribList(_EGLConfig
*conf
, _EGLDisplay
*dpy
,
514 const EGLint
*attrib_list
)
518 _eglInitConfig(conf
, dpy
, EGL_DONT_CARE
);
520 /* reset to default values */
521 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
522 attr
= _eglValidationTable
[i
].attr
;
523 val
= _eglValidationTable
[i
].default_value
;
524 _eglSetConfigKey(conf
, attr
, val
);
528 for (i
= 0; attrib_list
&& attrib_list
[i
] != EGL_NONE
; i
+= 2) {
529 attr
= attrib_list
[i
];
530 val
= attrib_list
[i
+ 1];
532 if (!_eglIsConfigAttribValid(conf
, attr
))
535 _eglSetConfigKey(conf
, attr
, val
);
538 if (!_eglValidateConfig(conf
, EGL_TRUE
))
541 /* EGL_LEVEL and EGL_MATCH_NATIVE_PIXMAP cannot be EGL_DONT_CARE */
542 if (conf
->Level
== EGL_DONT_CARE
||
543 conf
->MatchNativePixmap
== EGL_DONT_CARE
)
546 /* ignore other attributes when EGL_CONFIG_ID is given */
547 if (conf
->ConfigID
!= EGL_DONT_CARE
) {
548 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
549 attr
= _eglValidationTable
[i
].attr
;
550 if (attr
!= EGL_CONFIG_ID
)
551 _eglSetConfigKey(conf
, attr
, EGL_DONT_CARE
);
555 if (!(conf
->SurfaceType
& EGL_WINDOW_BIT
))
556 conf
->NativeVisualType
= EGL_DONT_CARE
;
558 if (conf
->TransparentType
== EGL_NONE
) {
559 conf
->TransparentRedValue
= EGL_DONT_CARE
;
560 conf
->TransparentGreenValue
= EGL_DONT_CARE
;
561 conf
->TransparentBlueValue
= EGL_DONT_CARE
;
570 * Decide the ordering of conf1 and conf2, under the given criteria.
571 * When compare_id is true, this implements the algorithm described
572 * in "Sorting of EGLConfigs". When compare_id is false,
573 * EGL_CONFIG_ID is not compared.
575 * It returns a negative integer if conf1 is considered to come
576 * before conf2; a positive integer if conf2 is considered to come
577 * before conf1; zero if the ordering cannot be decided.
579 * Note that EGL_NATIVE_VISUAL_TYPE is platform-dependent and is
583 _eglCompareConfigs(const _EGLConfig
*conf1
, const _EGLConfig
*conf2
,
584 const _EGLConfig
*criteria
, EGLBoolean compare_id
)
586 const EGLint compare_attribs
[] = {
600 /* the enum values have the desired ordering */
601 assert(EGL_NONE
< EGL_SLOW_CONFIG
);
602 assert(EGL_SLOW_CONFIG
< EGL_NON_CONFORMANT_CONFIG
);
603 val1
= conf1
->ConfigCaveat
- conf2
->ConfigCaveat
;
607 /* the enum values have the desired ordering */
608 assert(EGL_RGB_BUFFER
< EGL_LUMINANCE_BUFFER
);
609 val1
= conf1
->ColorBufferType
- conf2
->ColorBufferType
;
615 if (conf1
->ColorBufferType
== EGL_RGB_BUFFER
) {
616 if (criteria
->RedSize
> 0) {
617 val1
+= conf1
->RedSize
;
618 val2
+= conf2
->RedSize
;
620 if (criteria
->GreenSize
> 0) {
621 val1
+= conf1
->GreenSize
;
622 val2
+= conf2
->GreenSize
;
624 if (criteria
->BlueSize
> 0) {
625 val1
+= conf1
->BlueSize
;
626 val2
+= conf2
->BlueSize
;
630 if (criteria
->LuminanceSize
> 0) {
631 val1
+= conf1
->LuminanceSize
;
632 val2
+= conf2
->LuminanceSize
;
635 if (criteria
->AlphaSize
> 0) {
636 val1
+= conf1
->AlphaSize
;
637 val2
+= conf2
->AlphaSize
;
641 /* assume the default criteria, which gives no specific ordering */
645 /* for color bits, larger one is preferred */
647 return (val2
- val1
);
649 for (i
= 0; i
< ARRAY_SIZE(compare_attribs
); i
++) {
650 val1
= _eglGetConfigKey(conf1
, compare_attribs
[i
]);
651 val2
= _eglGetConfigKey(conf2
, compare_attribs
[i
]);
653 return (val1
- val2
);
656 /* EGL_NATIVE_VISUAL_TYPE cannot be compared here */
658 return (compare_id
) ? (conf1
->ConfigID
- conf2
->ConfigID
) : 0;
663 void _eglSwapConfigs(const _EGLConfig
**conf1
, const _EGLConfig
**conf2
)
665 const _EGLConfig
*tmp
= *conf1
;
672 * Quick sort an array of configs. This differs from the standard
673 * qsort() in that the compare function accepts an additional
677 _eglSortConfigs(const _EGLConfig
**configs
, EGLint count
,
678 EGLint (*compare
)(const _EGLConfig
*, const _EGLConfig
*,
682 const EGLint pivot
= 0;
688 _eglSwapConfigs(&configs
[pivot
], &configs
[count
/ 2]);
692 while (i
< count
&& compare(configs
[i
], configs
[pivot
], priv_data
) < 0)
694 while (compare(configs
[j
], configs
[pivot
], priv_data
) > 0)
697 _eglSwapConfigs(&configs
[i
], &configs
[j
]);
707 _eglSwapConfigs(&configs
[pivot
], &configs
[j
]);
709 _eglSortConfigs(configs
, j
, compare
, priv_data
);
710 _eglSortConfigs(configs
+ i
, count
- i
, compare
, priv_data
);
715 * A helper function for implementing eglChooseConfig. See _eglFilterArray and
716 * _eglSortConfigs for the meanings of match and compare.
719 _eglFilterConfigArray(_EGLArray
*array
, EGLConfig
*configs
,
720 EGLint config_size
, EGLint
*num_configs
,
721 EGLBoolean (*match
)(const _EGLConfig
*, void *),
722 EGLint (*compare
)(const _EGLConfig
*, const _EGLConfig
*,
726 _EGLConfig
**configList
;
730 return _eglError(EGL_BAD_PARAMETER
, "eglChooseConfigs");
732 /* get the number of matched configs */
733 count
= _eglFilterArray(array
, NULL
, 0,
734 (_EGLArrayForEach
) match
, priv_data
);
736 *num_configs
= count
;
740 configList
= malloc(sizeof(*configList
) * count
);
742 return _eglError(EGL_BAD_ALLOC
, "eglChooseConfig(out of memory)");
744 /* get the matched configs */
745 _eglFilterArray(array
, (void **) configList
, count
,
746 (_EGLArrayForEach
) match
, priv_data
);
748 /* perform sorting of configs */
749 if (configs
&& count
) {
750 _eglSortConfigs((const _EGLConfig
**) configList
, count
,
752 count
= MIN2(count
, config_size
);
753 for (i
= 0; i
< count
; i
++)
754 configs
[i
] = _eglGetConfigHandle(configList
[i
]);
759 *num_configs
= count
;
766 _eglFallbackMatch(const _EGLConfig
*conf
, void *priv_data
)
768 return _eglMatchConfig(conf
, (const _EGLConfig
*) priv_data
);
773 _eglFallbackCompare(const _EGLConfig
*conf1
, const _EGLConfig
*conf2
,
776 return _eglCompareConfigs(conf1
, conf2
,
777 (const _EGLConfig
*) priv_data
, EGL_TRUE
);
782 * Typical fallback routine for eglChooseConfig
785 _eglChooseConfig(_EGLDriver
*drv
, _EGLDisplay
*disp
, const EGLint
*attrib_list
,
786 EGLConfig
*configs
, EGLint config_size
, EGLint
*num_configs
)
790 if (!_eglParseConfigAttribList(&criteria
, disp
, attrib_list
))
791 return _eglError(EGL_BAD_ATTRIBUTE
, "eglChooseConfig");
793 return _eglFilterConfigArray(disp
->Configs
,
794 configs
, config_size
, num_configs
,
795 _eglFallbackMatch
, _eglFallbackCompare
,
801 * Fallback for eglGetConfigAttrib.
804 _eglGetConfigAttrib(_EGLDriver
*drv
, _EGLDisplay
*dpy
, _EGLConfig
*conf
,
805 EGLint attribute
, EGLint
*value
)
807 if (!_eglIsConfigAttribValid(conf
, attribute
))
808 return _eglError(EGL_BAD_ATTRIBUTE
, "eglGetConfigAttrib");
810 /* nonqueryable attributes */
812 case EGL_MATCH_NATIVE_PIXMAP
:
813 return _eglError(EGL_BAD_ATTRIBUTE
, "eglGetConfigAttrib");
820 return _eglError(EGL_BAD_PARAMETER
, "eglGetConfigAttrib");
822 *value
= _eglGetConfigKey(conf
, attribute
);
828 _eglFlattenConfig(void *elem
, void *buffer
)
830 _EGLConfig
*conf
= (_EGLConfig
*) elem
;
831 EGLConfig
*handle
= (EGLConfig
*) buffer
;
832 *handle
= _eglGetConfigHandle(conf
);
837 * Fallback for eglGetConfigs.
840 _eglGetConfigs(_EGLDriver
*drv
, _EGLDisplay
*disp
, EGLConfig
*configs
,
841 EGLint config_size
, EGLint
*num_config
)
844 return _eglError(EGL_BAD_PARAMETER
, "eglGetConfigs");
846 *num_config
= _eglFlattenArray(disp
->Configs
, (void *) configs
,
847 sizeof(configs
[0]), config_size
, _eglFlattenConfig
);