2 * EGL Configuration (pixel format) functions.
10 #include "egldisplay.h"
11 #include "eglcurrent.h"
15 #define MIN2(A, B) (((A) < (B)) ? (A) : (B))
19 * Init the given _EGLconfig to default values.
20 * \param id the configuration's ID.
22 * Note that id must be positive for the config to be valid.
23 * It is also recommended that when there are N configs, their
24 * IDs are from 1 to N respectively.
27 _eglInitConfig(_EGLConfig
*config
, _EGLDisplay
*dpy
, EGLint id
)
29 memset(config
, 0, sizeof(*config
));
31 config
->Display
= dpy
;
33 /* some attributes take non-zero default values */
34 SET_CONFIG_ATTRIB(config
, EGL_CONFIG_ID
, id
);
35 SET_CONFIG_ATTRIB(config
, EGL_CONFIG_CAVEAT
, EGL_NONE
);
36 SET_CONFIG_ATTRIB(config
, EGL_TRANSPARENT_TYPE
, EGL_NONE
);
37 SET_CONFIG_ATTRIB(config
, EGL_NATIVE_VISUAL_TYPE
, EGL_NONE
);
38 #ifdef EGL_VERSION_1_2
39 SET_CONFIG_ATTRIB(config
, EGL_COLOR_BUFFER_TYPE
, EGL_RGB_BUFFER
);
40 #endif /* EGL_VERSION_1_2 */
45 * Link a config to a display and return the handle of the link.
46 * The handle can be passed to client directly.
48 * Note that we just save the ptr to the config (we don't copy the config).
51 _eglAddConfig(_EGLDisplay
*dpy
, _EGLConfig
*conf
)
54 assert(GET_CONFIG_ATTRIB(conf
, EGL_CONFIG_ID
) > 0);
57 dpy
->Configs
= _eglCreateArray("Config", 16);
59 return (EGLConfig
) NULL
;
63 _eglAppendArray(dpy
->Configs
, (void *) conf
);
65 return (EGLConfig
) conf
;
70 _eglCheckConfigHandle(EGLConfig config
, _EGLDisplay
*dpy
)
74 conf
= (_EGLConfig
*) _eglFindArray(dpy
->Configs
, (void *) config
);
76 assert(conf
->Display
== dpy
);
78 return (conf
!= NULL
);
88 ATTRIB_TYPE_PSEUDO
, /* non-queryable */
89 ATTRIB_TYPE_PLATFORM
, /* platform-dependent */
91 ATTRIB_CRITERION_EXACT
,
92 ATTRIB_CRITERION_ATLEAST
,
93 ATTRIB_CRITERION_MASK
,
94 ATTRIB_CRITERION_SPECIAL
,
95 ATTRIB_CRITERION_IGNORE
99 /* EGL spec Table 3.1 and 3.4 */
100 static const struct {
104 EGLint default_value
;
105 } _eglValidationTable
[] =
108 { EGL_BUFFER_SIZE
, ATTRIB_TYPE_INTEGER
,
109 ATTRIB_CRITERION_ATLEAST
,
111 { EGL_RED_SIZE
, ATTRIB_TYPE_INTEGER
,
112 ATTRIB_CRITERION_ATLEAST
,
114 { EGL_GREEN_SIZE
, ATTRIB_TYPE_INTEGER
,
115 ATTRIB_CRITERION_ATLEAST
,
117 { EGL_BLUE_SIZE
, ATTRIB_TYPE_INTEGER
,
118 ATTRIB_CRITERION_ATLEAST
,
120 { EGL_LUMINANCE_SIZE
, ATTRIB_TYPE_INTEGER
,
121 ATTRIB_CRITERION_ATLEAST
,
123 { EGL_ALPHA_SIZE
, ATTRIB_TYPE_INTEGER
,
124 ATTRIB_CRITERION_ATLEAST
,
126 { EGL_ALPHA_MASK_SIZE
, ATTRIB_TYPE_INTEGER
,
127 ATTRIB_CRITERION_ATLEAST
,
129 { EGL_BIND_TO_TEXTURE_RGB
, ATTRIB_TYPE_BOOLEAN
,
130 ATTRIB_CRITERION_EXACT
,
132 { EGL_BIND_TO_TEXTURE_RGBA
, ATTRIB_TYPE_BOOLEAN
,
133 ATTRIB_CRITERION_EXACT
,
135 { EGL_COLOR_BUFFER_TYPE
, ATTRIB_TYPE_ENUM
,
136 ATTRIB_CRITERION_EXACT
,
138 { EGL_CONFIG_CAVEAT
, ATTRIB_TYPE_ENUM
,
139 ATTRIB_CRITERION_EXACT
,
141 { EGL_CONFIG_ID
, ATTRIB_TYPE_INTEGER
,
142 ATTRIB_CRITERION_EXACT
,
144 { EGL_CONFORMANT
, ATTRIB_TYPE_BITMASK
,
145 ATTRIB_CRITERION_MASK
,
147 { EGL_DEPTH_SIZE
, ATTRIB_TYPE_INTEGER
,
148 ATTRIB_CRITERION_ATLEAST
,
150 { EGL_LEVEL
, ATTRIB_TYPE_PLATFORM
,
151 ATTRIB_CRITERION_EXACT
,
153 { EGL_MAX_PBUFFER_WIDTH
, ATTRIB_TYPE_INTEGER
,
154 ATTRIB_CRITERION_IGNORE
,
156 { EGL_MAX_PBUFFER_HEIGHT
, ATTRIB_TYPE_INTEGER
,
157 ATTRIB_CRITERION_IGNORE
,
159 { EGL_MAX_PBUFFER_PIXELS
, ATTRIB_TYPE_INTEGER
,
160 ATTRIB_CRITERION_IGNORE
,
162 { EGL_MAX_SWAP_INTERVAL
, ATTRIB_TYPE_INTEGER
,
163 ATTRIB_CRITERION_EXACT
,
165 { EGL_MIN_SWAP_INTERVAL
, ATTRIB_TYPE_INTEGER
,
166 ATTRIB_CRITERION_EXACT
,
168 { EGL_NATIVE_RENDERABLE
, ATTRIB_TYPE_BOOLEAN
,
169 ATTRIB_CRITERION_EXACT
,
171 { EGL_NATIVE_VISUAL_ID
, ATTRIB_TYPE_PLATFORM
,
172 ATTRIB_CRITERION_IGNORE
,
174 { EGL_NATIVE_VISUAL_TYPE
, ATTRIB_TYPE_PLATFORM
,
175 ATTRIB_CRITERION_EXACT
,
177 { EGL_RENDERABLE_TYPE
, ATTRIB_TYPE_BITMASK
,
178 ATTRIB_CRITERION_MASK
,
180 { EGL_SAMPLE_BUFFERS
, ATTRIB_TYPE_INTEGER
,
181 ATTRIB_CRITERION_ATLEAST
,
183 { EGL_SAMPLES
, ATTRIB_TYPE_INTEGER
,
184 ATTRIB_CRITERION_ATLEAST
,
186 { EGL_STENCIL_SIZE
, ATTRIB_TYPE_INTEGER
,
187 ATTRIB_CRITERION_ATLEAST
,
189 { EGL_SURFACE_TYPE
, ATTRIB_TYPE_BITMASK
,
190 ATTRIB_CRITERION_MASK
,
192 { EGL_TRANSPARENT_TYPE
, ATTRIB_TYPE_ENUM
,
193 ATTRIB_CRITERION_EXACT
,
195 { EGL_TRANSPARENT_RED_VALUE
, ATTRIB_TYPE_INTEGER
,
196 ATTRIB_CRITERION_EXACT
,
198 { EGL_TRANSPARENT_GREEN_VALUE
, ATTRIB_TYPE_INTEGER
,
199 ATTRIB_CRITERION_EXACT
,
201 { EGL_TRANSPARENT_BLUE_VALUE
, ATTRIB_TYPE_INTEGER
,
202 ATTRIB_CRITERION_EXACT
,
204 { EGL_MATCH_NATIVE_PIXMAP
, ATTRIB_TYPE_PSEUDO
,
205 ATTRIB_CRITERION_SPECIAL
,
208 { EGL_Y_INVERTED_NOK
, ATTRIB_TYPE_BOOLEAN
,
209 ATTRIB_CRITERION_EXACT
,
215 * Return true if a config is valid. When for_matching is true,
216 * EGL_DONT_CARE is accepted as a valid attribute value, and checks
217 * for conflicting attribute values are skipped.
219 * Note that some attributes are platform-dependent and are not
223 _eglValidateConfig(const _EGLConfig
*conf
, EGLBoolean for_matching
)
226 EGLBoolean valid
= EGL_TRUE
;
227 EGLint red_size
= 0, green_size
= 0, blue_size
= 0, luminance_size
= 0;
228 EGLint alpha_size
= 0, buffer_size
= 0;
230 /* check attributes by their types */
231 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
234 attr
= _eglValidationTable
[i
].attr
;
235 val
= GET_CONFIG_ATTRIB(conf
, attr
);
237 switch (_eglValidationTable
[i
].type
) {
238 case ATTRIB_TYPE_INTEGER
:
241 /* config id must be positive */
245 case EGL_SAMPLE_BUFFERS
:
246 /* there can be at most 1 sample buffer */
259 case EGL_LUMINANCE_SIZE
:
260 luminance_size
= val
;
265 case EGL_BUFFER_SIZE
:
272 case ATTRIB_TYPE_BOOLEAN
:
273 if (val
!= EGL_TRUE
&& val
!= EGL_FALSE
)
276 case ATTRIB_TYPE_ENUM
:
278 case EGL_CONFIG_CAVEAT
:
279 if (val
!= EGL_NONE
&& val
!= EGL_SLOW_CONFIG
&&
280 val
!= EGL_NON_CONFORMANT_CONFIG
)
283 case EGL_TRANSPARENT_TYPE
:
284 if (val
!= EGL_NONE
&& val
!= EGL_TRANSPARENT_RGB
)
287 case EGL_COLOR_BUFFER_TYPE
:
288 if (val
!= EGL_RGB_BUFFER
&& val
!= EGL_LUMINANCE_BUFFER
)
296 case ATTRIB_TYPE_BITMASK
:
298 case EGL_SURFACE_TYPE
:
299 mask
= EGL_PBUFFER_BIT
|
302 EGL_VG_COLORSPACE_LINEAR_BIT
|
303 EGL_VG_ALPHA_FORMAT_PRE_BIT
|
304 EGL_MULTISAMPLE_RESOLVE_BOX_BIT
|
305 EGL_SWAP_BEHAVIOR_PRESERVED_BIT
;
306 #ifdef EGL_MESA_screen_surface
307 if (conf
->Display
->Extensions
.MESA_screen_surface
)
308 mask
|= EGL_SCREEN_BIT_MESA
;
311 case EGL_RENDERABLE_TYPE
:
313 mask
= EGL_OPENGL_ES_BIT
|
325 case ATTRIB_TYPE_PLATFORM
:
326 /* unable to check platform-dependent attributes here */
328 case ATTRIB_TYPE_PSEUDO
:
329 /* pseudo attributes should not be set */
338 if (!valid
&& for_matching
) {
339 /* accept EGL_DONT_CARE as a valid value */
340 if (val
== EGL_DONT_CARE
)
342 if (_eglValidationTable
[i
].criterion
== ATTRIB_CRITERION_SPECIAL
)
347 "attribute 0x%04x has an invalid value 0x%x", attr
, val
);
352 /* any invalid attribute value should have been catched */
353 if (!valid
|| for_matching
)
356 /* now check for conflicting attribute values */
358 switch (GET_CONFIG_ATTRIB(conf
, EGL_COLOR_BUFFER_TYPE
)) {
362 if (red_size
+ green_size
+ blue_size
+ alpha_size
!= buffer_size
)
365 case EGL_LUMINANCE_BUFFER
:
366 if (red_size
|| green_size
|| blue_size
)
368 if (luminance_size
+ alpha_size
!= buffer_size
)
373 _eglLog(_EGL_DEBUG
, "conflicting color buffer type and channel sizes");
377 val
= GET_CONFIG_ATTRIB(conf
, EGL_SAMPLE_BUFFERS
);
378 if (!val
&& GET_CONFIG_ATTRIB(conf
, EGL_SAMPLES
))
381 _eglLog(_EGL_DEBUG
, "conflicting samples and sample buffers");
385 val
= GET_CONFIG_ATTRIB(conf
, EGL_SURFACE_TYPE
);
386 if (!(val
& EGL_WINDOW_BIT
)) {
387 if (GET_CONFIG_ATTRIB(conf
, EGL_NATIVE_VISUAL_ID
) != 0 ||
388 GET_CONFIG_ATTRIB(conf
, EGL_NATIVE_VISUAL_TYPE
) != EGL_NONE
)
391 if (!(val
& EGL_PBUFFER_BIT
)) {
392 if (GET_CONFIG_ATTRIB(conf
, EGL_BIND_TO_TEXTURE_RGB
) ||
393 GET_CONFIG_ATTRIB(conf
, EGL_BIND_TO_TEXTURE_RGBA
))
397 _eglLog(_EGL_DEBUG
, "conflicting surface type and native visual/texture binding");
406 * Return true if a config matches the criteria. This and
407 * _eglParseConfigAttribList together implement the algorithm
408 * described in "Selection of EGLConfigs".
410 * Note that attributes that are special (currently, only
411 * EGL_MATCH_NATIVE_PIXMAP) are ignored.
414 _eglMatchConfig(const _EGLConfig
*conf
, const _EGLConfig
*criteria
)
417 EGLBoolean matched
= EGL_TRUE
;
419 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
421 if (_eglValidationTable
[i
].criterion
== ATTRIB_CRITERION_IGNORE
)
424 attr
= _eglValidationTable
[i
].attr
;
425 cmp
= GET_CONFIG_ATTRIB(criteria
, attr
);
426 if (cmp
== EGL_DONT_CARE
)
429 val
= GET_CONFIG_ATTRIB(conf
, attr
);
430 switch (_eglValidationTable
[i
].criterion
) {
431 case ATTRIB_CRITERION_EXACT
:
435 case ATTRIB_CRITERION_ATLEAST
:
439 case ATTRIB_CRITERION_MASK
:
440 if ((val
& cmp
) != cmp
)
443 case ATTRIB_CRITERION_SPECIAL
:
453 /* only print the common errors when DEBUG is not defined */
454 if (attr
!= EGL_RENDERABLE_TYPE
)
458 "the value (0x%x) of attribute 0x%04x did not meet the criteria (0x%x)",
467 static INLINE EGLBoolean
468 _eglIsConfigAttribValid(_EGLConfig
*conf
, EGLint attr
)
470 if (_eglOffsetOfConfig(attr
) < 0)
474 case EGL_MATCH_NATIVE_PIXMAP
:
476 case EGL_Y_INVERTED_NOK
:
477 return conf
->Display
->Extensions
.NOK_texture_from_pixmap
;
486 * Initialize a criteria config from the given attribute list.
487 * Return EGL_FALSE if any of the attribute is invalid.
490 _eglParseConfigAttribList(_EGLConfig
*conf
, const EGLint
*attrib_list
)
493 EGLint config_id
= 0, level
= 0;
494 EGLBoolean has_native_visual_type
= EGL_FALSE
;
495 EGLBoolean has_transparent_color
= EGL_FALSE
;
497 /* reset to default values */
498 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
499 attr
= _eglValidationTable
[i
].attr
;
500 val
= _eglValidationTable
[i
].default_value
;
501 SET_CONFIG_ATTRIB(conf
, attr
, val
);
505 for (i
= 0; attrib_list
&& attrib_list
[i
] != EGL_NONE
; i
+= 2) {
506 attr
= attrib_list
[i
];
507 val
= attrib_list
[i
+ 1];
509 if (!_eglIsConfigAttribValid(conf
, attr
))
512 SET_CONFIG_ATTRIB(conf
, attr
, val
);
514 /* rememeber some attributes for post-processing */
522 case EGL_NATIVE_VISUAL_TYPE
:
523 has_native_visual_type
= EGL_TRUE
;
525 case EGL_TRANSPARENT_RED_VALUE
:
526 case EGL_TRANSPARENT_GREEN_VALUE
:
527 case EGL_TRANSPARENT_BLUE_VALUE
:
528 has_transparent_color
= EGL_TRUE
;
535 if (!_eglValidateConfig(conf
, EGL_TRUE
))
538 /* the spec says that EGL_LEVEL cannot be EGL_DONT_CARE */
539 if (level
== EGL_DONT_CARE
)
542 /* ignore other attributes when EGL_CONFIG_ID is given */
543 if (conf
->ConfigID
> 0) {
544 for (i
= 0; i
< ARRAY_SIZE(_eglValidationTable
); i
++) {
545 attr
= _eglValidationTable
[i
].attr
;
546 if (attr
!= EGL_CONFIG_ID
)
547 SET_CONFIG_ATTRIB(conf
, attr
, EGL_DONT_CARE
);
551 if (has_native_visual_type
) {
552 val
= GET_CONFIG_ATTRIB(conf
, EGL_SURFACE_TYPE
);
553 if (!(val
& EGL_WINDOW_BIT
))
554 SET_CONFIG_ATTRIB(conf
, EGL_NATIVE_VISUAL_TYPE
, EGL_DONT_CARE
);
557 if (has_transparent_color
) {
558 val
= GET_CONFIG_ATTRIB(conf
, EGL_TRANSPARENT_TYPE
);
559 if (val
== EGL_NONE
) {
560 SET_CONFIG_ATTRIB(conf
, EGL_TRANSPARENT_RED_VALUE
,
562 SET_CONFIG_ATTRIB(conf
, EGL_TRANSPARENT_GREEN_VALUE
,
564 SET_CONFIG_ATTRIB(conf
, EGL_TRANSPARENT_BLUE_VALUE
,
575 * Decide the ordering of conf1 and conf2, under the given criteria.
576 * When compare_id is true, this implements the algorithm described
577 * in "Sorting of EGLConfigs". When compare_id is false,
578 * EGL_CONFIG_ID is not compared.
580 * It returns a negative integer if conf1 is considered to come
581 * before conf2; a positive integer if conf2 is considered to come
582 * before conf1; zero if the ordering cannot be decided.
584 * Note that EGL_NATIVE_VISUAL_TYPE is platform-dependent and is
588 _eglCompareConfigs(const _EGLConfig
*conf1
, const _EGLConfig
*conf2
,
589 const _EGLConfig
*criteria
, EGLBoolean compare_id
)
591 const EGLint compare_attribs
[] = {
600 EGLBoolean rgb_buffer
;
606 /* the enum values have the desired ordering */
607 assert(EGL_NONE
< EGL_SLOW_CONFIG
);
608 assert(EGL_SLOW_CONFIG
< EGL_NON_CONFORMANT_CONFIG
);
609 val1
= GET_CONFIG_ATTRIB(conf1
, EGL_CONFIG_CAVEAT
);
610 val2
= GET_CONFIG_ATTRIB(conf2
, EGL_CONFIG_CAVEAT
);
612 return (val1
- val2
);
614 /* the enum values have the desired ordering */
615 assert(EGL_RGB_BUFFER
< EGL_LUMINANCE_BUFFER
);
616 val1
= GET_CONFIG_ATTRIB(conf1
, EGL_COLOR_BUFFER_TYPE
);
617 val2
= GET_CONFIG_ATTRIB(conf2
, EGL_COLOR_BUFFER_TYPE
);
619 return (val1
- val2
);
620 rgb_buffer
= (val1
== EGL_RGB_BUFFER
);
625 if (GET_CONFIG_ATTRIB(criteria
, EGL_RED_SIZE
) > 0) {
626 val1
+= GET_CONFIG_ATTRIB(conf1
, EGL_RED_SIZE
);
627 val2
+= GET_CONFIG_ATTRIB(conf2
, EGL_RED_SIZE
);
629 if (GET_CONFIG_ATTRIB(criteria
, EGL_GREEN_SIZE
) > 0) {
630 val1
+= GET_CONFIG_ATTRIB(conf1
, EGL_GREEN_SIZE
);
631 val2
+= GET_CONFIG_ATTRIB(conf2
, EGL_GREEN_SIZE
);
633 if (GET_CONFIG_ATTRIB(criteria
, EGL_BLUE_SIZE
) > 0) {
634 val1
+= GET_CONFIG_ATTRIB(conf1
, EGL_BLUE_SIZE
);
635 val2
+= GET_CONFIG_ATTRIB(conf2
, EGL_BLUE_SIZE
);
639 if (GET_CONFIG_ATTRIB(criteria
, EGL_LUMINANCE_SIZE
) > 0) {
640 val1
+= GET_CONFIG_ATTRIB(conf1
, EGL_LUMINANCE_SIZE
);
641 val2
+= GET_CONFIG_ATTRIB(conf2
, EGL_LUMINANCE_SIZE
);
644 if (GET_CONFIG_ATTRIB(criteria
, EGL_ALPHA_SIZE
) > 0) {
645 val1
+= GET_CONFIG_ATTRIB(conf1
, EGL_ALPHA_SIZE
);
646 val2
+= GET_CONFIG_ATTRIB(conf2
, EGL_ALPHA_SIZE
);
650 /* assume the default criteria, which gives no specific ordering */
654 /* for color bits, larger one is preferred */
656 return (val2
- val1
);
658 for (i
= 0; i
< ARRAY_SIZE(compare_attribs
); i
++) {
659 val1
= GET_CONFIG_ATTRIB(conf1
, compare_attribs
[i
]);
660 val2
= GET_CONFIG_ATTRIB(conf2
, compare_attribs
[i
]);
662 return (val1
- val2
);
665 /* EGL_NATIVE_VISUAL_TYPE cannot be compared here */
668 val1
= GET_CONFIG_ATTRIB(conf1
, EGL_CONFIG_ID
);
669 val2
= GET_CONFIG_ATTRIB(conf2
, EGL_CONFIG_ID
);
670 assert(val1
!= val2
);
676 return (val1
- val2
);
681 void _eglSwapConfigs(const _EGLConfig
**conf1
, const _EGLConfig
**conf2
)
683 const _EGLConfig
*tmp
= *conf1
;
690 * Quick sort an array of configs. This differs from the standard
691 * qsort() in that the compare function accepts an additional
695 _eglSortConfigs(const _EGLConfig
**configs
, EGLint count
,
696 EGLint (*compare
)(const _EGLConfig
*, const _EGLConfig
*,
700 const EGLint pivot
= 0;
706 _eglSwapConfigs(&configs
[pivot
], &configs
[count
/ 2]);
710 while (i
< count
&& compare(configs
[i
], configs
[pivot
], priv_data
) < 0)
712 while (compare(configs
[j
], configs
[pivot
], priv_data
) > 0)
715 _eglSwapConfigs(&configs
[i
], &configs
[j
]);
725 _eglSwapConfigs(&configs
[pivot
], &configs
[j
]);
727 _eglSortConfigs(configs
, j
, compare
, priv_data
);
728 _eglSortConfigs(configs
+ i
, count
- i
, compare
, priv_data
);
733 _eglFallbackCompare(const _EGLConfig
*conf1
, const _EGLConfig
*conf2
,
736 const _EGLConfig
*criteria
= (const _EGLConfig
*) priv_data
;
737 return _eglCompareConfigs(conf1
, conf2
, criteria
, EGL_TRUE
);
742 * Typical fallback routine for eglChooseConfig
745 _eglChooseConfig(_EGLDriver
*drv
, _EGLDisplay
*disp
, const EGLint
*attrib_list
,
746 EGLConfig
*configs
, EGLint config_size
, EGLint
*num_configs
)
748 _EGLConfig
**configList
, criteria
;
752 return _eglError(EGL_BAD_PARAMETER
, "eglChooseConfigs");
754 _eglInitConfig(&criteria
, disp
, 0);
755 if (!_eglParseConfigAttribList(&criteria
, attrib_list
))
756 return _eglError(EGL_BAD_ATTRIBUTE
, "eglChooseConfig");
758 configList
= (_EGLConfig
**) _eglFilterArray(disp
->Configs
, &count
,
759 (_EGLArrayForEach
) _eglMatchConfig
, (void *) &criteria
);
761 return _eglError(EGL_BAD_ALLOC
, "eglChooseConfig(out of memory)");
763 /* perform sorting of configs */
764 if (configs
&& count
) {
765 _eglSortConfigs((const _EGLConfig
**) configList
, count
,
766 _eglFallbackCompare
, (void *) &criteria
);
767 count
= MIN2(count
, config_size
);
768 for (i
= 0; i
< count
; i
++)
769 configs
[i
] = _eglGetConfigHandle(configList
[i
]);
774 *num_configs
= count
;
781 * Fallback for eglGetConfigAttrib.
784 _eglGetConfigAttrib(_EGLDriver
*drv
, _EGLDisplay
*dpy
, _EGLConfig
*conf
,
785 EGLint attribute
, EGLint
*value
)
787 if (!_eglIsConfigAttribValid(conf
, attribute
))
788 return _eglError(EGL_BAD_ATTRIBUTE
, "eglGetConfigAttrib");
790 return _eglError(EGL_BAD_PARAMETER
, "eglGetConfigAttrib");
792 *value
= GET_CONFIG_ATTRIB(conf
, attribute
);
798 _eglFlattenConfig(void *elem
, void *buffer
)
800 _EGLConfig
*conf
= (_EGLConfig
*) elem
;
801 EGLConfig
*handle
= (EGLConfig
*) buffer
;
802 *handle
= _eglGetConfigHandle(conf
);
807 * Fallback for eglGetConfigs.
810 _eglGetConfigs(_EGLDriver
*drv
, _EGLDisplay
*disp
, EGLConfig
*configs
,
811 EGLint config_size
, EGLint
*num_config
)
814 return _eglError(EGL_BAD_PARAMETER
, "eglGetConfigs");
816 *num_config
= _eglFlattenArray(disp
->Configs
, (void *) configs
,
817 sizeof(configs
[0]), config_size
, _eglFlattenConfig
);