/************************************************************************** * * Copyright 2008 VMware, Inc. * Copyright 2009-2010 Chia-I Wu * Copyright 2010-2011 LunarG, Inc. * 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, sub license, 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. * **************************************************************************/ /** * EGL Configuration (pixel format) functions. */ #include #include #include #include "c99_compat.h" #include "eglconfig.h" #include "egldisplay.h" #include "eglcurrent.h" #include "egllog.h" /** * Init the given _EGLconfig to default values. * \param id the configuration's ID. * * Note that id must be positive for the config to be valid. * It is also recommended that when there are N configs, their * IDs are from 1 to N respectively. */ void _eglInitConfig(_EGLConfig *conf, _EGLDisplay *dpy, EGLint id) { memset(conf, 0, sizeof(*conf)); conf->Display = dpy; /* some attributes take non-zero default values */ conf->ConfigID = id; conf->ConfigCaveat = EGL_NONE; conf->TransparentType = EGL_NONE; conf->NativeVisualType = EGL_NONE; conf->ColorBufferType = EGL_RGB_BUFFER; } /** * Link a config to its display and return the handle of the link. * The handle can be passed to client directly. * * Note that we just save the ptr to the config (we don't copy the config). */ EGLConfig _eglLinkConfig(_EGLConfig *conf) { _EGLDisplay *dpy = conf->Display; /* sanity check */ assert(dpy); assert(conf->ConfigID > 0); if (!dpy->Configs) { dpy->Configs = _eglCreateArray("Config", 16); if (!dpy->Configs) return (EGLConfig) NULL; } _eglAppendArray(dpy->Configs, (void *) conf); return (EGLConfig) conf; } /** * Lookup a handle to find the linked config. * Return NULL if the handle has no corresponding linked config. */ _EGLConfig * _eglLookupConfig(EGLConfig config, _EGLDisplay *dpy) { _EGLConfig *conf; if (!dpy) return NULL; conf = (_EGLConfig *) _eglFindArray(dpy->Configs, (void *) config); if (conf) assert(conf->Display == dpy); return conf; } enum { /* types */ ATTRIB_TYPE_INTEGER, ATTRIB_TYPE_BOOLEAN, ATTRIB_TYPE_BITMASK, ATTRIB_TYPE_ENUM, ATTRIB_TYPE_PSEUDO, /* non-queryable */ ATTRIB_TYPE_PLATFORM, /* platform-dependent */ /* criteria */ ATTRIB_CRITERION_EXACT, ATTRIB_CRITERION_ATLEAST, ATTRIB_CRITERION_MASK, ATTRIB_CRITERION_SPECIAL, ATTRIB_CRITERION_IGNORE }; /* EGL spec Table 3.1 and 3.4 */ static const struct { EGLint attr; EGLint type; EGLint criterion; EGLint default_value; } _eglValidationTable[] = { /* core */ { EGL_BUFFER_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_RED_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_GREEN_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_BLUE_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_LUMINANCE_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_ALPHA_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_ALPHA_MASK_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_BIND_TO_TEXTURE_RGB, ATTRIB_TYPE_BOOLEAN, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_BIND_TO_TEXTURE_RGBA, ATTRIB_TYPE_BOOLEAN, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_COLOR_BUFFER_TYPE, ATTRIB_TYPE_ENUM, ATTRIB_CRITERION_EXACT, EGL_RGB_BUFFER }, { EGL_CONFIG_CAVEAT, ATTRIB_TYPE_ENUM, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_CONFIG_ID, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_CONFORMANT, ATTRIB_TYPE_BITMASK, ATTRIB_CRITERION_MASK, 0 }, { EGL_DEPTH_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_LEVEL, ATTRIB_TYPE_PLATFORM, ATTRIB_CRITERION_EXACT, 0 }, { EGL_MAX_PBUFFER_WIDTH, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_IGNORE, 0 }, { EGL_MAX_PBUFFER_HEIGHT, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_IGNORE, 0 }, { EGL_MAX_PBUFFER_PIXELS, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_IGNORE, 0 }, { EGL_MAX_SWAP_INTERVAL, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_MIN_SWAP_INTERVAL, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_NATIVE_RENDERABLE, ATTRIB_TYPE_BOOLEAN, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_NATIVE_VISUAL_ID, ATTRIB_TYPE_PLATFORM, ATTRIB_CRITERION_IGNORE, 0 }, { EGL_NATIVE_VISUAL_TYPE, ATTRIB_TYPE_PLATFORM, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_RENDERABLE_TYPE, ATTRIB_TYPE_BITMASK, ATTRIB_CRITERION_MASK, EGL_OPENGL_ES_BIT }, { EGL_SAMPLE_BUFFERS, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_SAMPLES, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_STENCIL_SIZE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_ATLEAST, 0 }, { EGL_SURFACE_TYPE, ATTRIB_TYPE_BITMASK, ATTRIB_CRITERION_MASK, EGL_WINDOW_BIT }, { EGL_TRANSPARENT_TYPE, ATTRIB_TYPE_ENUM, ATTRIB_CRITERION_EXACT, EGL_NONE }, { EGL_TRANSPARENT_RED_VALUE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_TRANSPARENT_GREEN_VALUE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_TRANSPARENT_BLUE_VALUE, ATTRIB_TYPE_INTEGER, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE }, { EGL_MATCH_NATIVE_PIXMAP, ATTRIB_TYPE_PSEUDO, ATTRIB_CRITERION_SPECIAL, EGL_NONE }, /* extensions */ { EGL_Y_INVERTED_NOK, ATTRIB_TYPE_BOOLEAN, ATTRIB_CRITERION_EXACT, EGL_DONT_CARE } }; /** * Return true if a config is valid. When for_matching is true, * EGL_DONT_CARE is accepted as a valid attribute value, and checks * for conflicting attribute values are skipped. * * Note that some attributes are platform-dependent and are not * checked. */ EGLBoolean _eglValidateConfig(const _EGLConfig *conf, EGLBoolean for_matching) { EGLint i, attr, val; EGLBoolean valid = EGL_TRUE; /* check attributes by their types */ for (i = 0; i < ARRAY_SIZE(_eglValidationTable); i++) { EGLint mask; attr = _eglValidationTable[i].attr; val = _eglGetConfigKey(conf, attr); switch (_eglValidationTable[i].type) { case ATTRIB_TYPE_INTEGER: switch (attr) { case EGL_CONFIG_ID: /* config id must be positive */ if (val <= 0) valid = EGL_FALSE; break; case EGL_SAMPLE_BUFFERS: /* there can be at most 1 sample buffer */ if (val > 1 || val < 0) valid = EGL_FALSE; break; default: if (val < 0) valid = EGL_FALSE; break; } break; case ATTRIB_TYPE_BOOLEAN: if (val != EGL_TRUE && val != EGL_FALSE) valid = EGL_FALSE; break; case ATTRIB_TYPE_ENUM: switch (attr) { case EGL_CONFIG_CAVEAT: if (val != EGL_NONE && val != EGL_SLOW_CONFIG && val != EGL_NON_CONFORMANT_CONFIG) valid = EGL_FALSE; break; case EGL_TRANSPARENT_TYPE: if (val != EGL_NONE && val != EGL_TRANSPARENT_RGB) valid = EGL_FALSE; break; case EGL_COLOR_BUFFER_TYPE: if (val != EGL_RGB_BUFFER && val != EGL_LUMINANCE_BUFFER) valid = EGL_FALSE; break; default: assert(0); break; } break; case ATTRIB_TYPE_BITMASK: switch (attr) { case EGL_SURFACE_TYPE: mask = EGL_PBUFFER_BIT | EGL_PIXMAP_BIT | EGL_WINDOW_BIT | EGL_VG_COLORSPACE_LINEAR_BIT | EGL_VG_ALPHA_FORMAT_PRE_BIT | EGL_MULTISAMPLE_RESOLVE_BOX_BIT | EGL_SWAP_BEHAVIOR_PRESERVED_BIT; break; case EGL_RENDERABLE_TYPE: case EGL_CONFORMANT: mask = EGL_OPENGL_ES_BIT | EGL_OPENVG_BIT | EGL_OPENGL_ES2_BIT | EGL_OPENGL_ES3_BIT_KHR | EGL_OPENGL_BIT; break; default: assert(0); mask = 0; break; } if (val & ~mask) valid = EGL_FALSE; break; case ATTRIB_TYPE_PLATFORM: /* unable to check platform-dependent attributes here */ break; case ATTRIB_TYPE_PSEUDO: /* pseudo attributes should not be set */ if (val != 0) valid = EGL_FALSE; break; default: assert(0); break; } if (!valid && for_matching) { /* accept EGL_DONT_CARE as a valid value */ if (val == EGL_DONT_CARE) valid = EGL_TRUE; if (_eglValidationTable[i].criterion == ATTRIB_CRITERION_SPECIAL) valid = EGL_TRUE; } if (!valid) { _eglLog(_EGL_DEBUG, "attribute 0x%04x has an invalid value 0x%x", attr, val); break; } } /* any invalid attribute value should have been catched */ if (!valid || for_matching) return valid; /* now check for conflicting attribute values */ switch (conf->ColorBufferType) { case EGL_RGB_BUFFER: if (conf->LuminanceSize) valid = EGL_FALSE; if (conf->RedSize + conf->GreenSize + conf->BlueSize + conf->AlphaSize != conf->BufferSize) valid = EGL_FALSE; break; case EGL_LUMINANCE_BUFFER: if (conf->RedSize || conf->GreenSize || conf->BlueSize) valid = EGL_FALSE; if (conf->LuminanceSize + conf->AlphaSize != conf->BufferSize) valid = EGL_FALSE; break; } if (!valid) { _eglLog(_EGL_DEBUG, "conflicting color buffer type and channel sizes"); return EGL_FALSE; } if (!conf->SampleBuffers && conf->Samples) valid = EGL_FALSE; if (!valid) { _eglLog(_EGL_DEBUG, "conflicting samples and sample buffers"); return EGL_FALSE; } if (!(conf->SurfaceType & EGL_WINDOW_BIT)) { if (conf->NativeVisualID != 0 || conf->NativeVisualType != EGL_NONE) valid = EGL_FALSE; } if (!(conf->SurfaceType & EGL_PBUFFER_BIT)) { if (conf->BindToTextureRGB || conf->BindToTextureRGBA) valid = EGL_FALSE; } if (!valid) { _eglLog(_EGL_DEBUG, "conflicting surface type and native visual/texture binding"); return EGL_FALSE; } return valid; } /** * Return true if a config matches the criteria. This and * _eglParseConfigAttribList together implement the algorithm * described in "Selection of EGLConfigs". * * Note that attributes that are special (currently, only * EGL_MATCH_NATIVE_PIXMAP) are ignored. */ EGLBoolean _eglMatchConfig(const _EGLConfig *conf, const _EGLConfig *criteria) { EGLint attr, val, i; EGLBoolean matched = EGL_TRUE; for (i = 0; i < ARRAY_SIZE(_eglValidationTable); i++) { EGLint cmp; if (_eglValidationTable[i].criterion == ATTRIB_CRITERION_IGNORE) continue; attr = _eglValidationTable[i].attr; cmp = _eglGetConfigKey(criteria, attr); if (cmp == EGL_DONT_CARE) continue; val = _eglGetConfigKey(conf, attr); switch (_eglValidationTable[i].criterion) { case ATTRIB_CRITERION_EXACT: if (val != cmp) matched = EGL_FALSE; break; case ATTRIB_CRITERION_ATLEAST: if (val < cmp) matched = EGL_FALSE; break; case ATTRIB_CRITERION_MASK: if ((val & cmp) != cmp) matched = EGL_FALSE; break; case ATTRIB_CRITERION_SPECIAL: /* ignored here */ break; default: assert(0); break; } if (!matched) { #ifndef DEBUG /* only print the common errors when DEBUG is not defined */ if (attr != EGL_RENDERABLE_TYPE) break; #endif _eglLog(_EGL_DEBUG, "the value (0x%x) of attribute 0x%04x did not meet the criteria (0x%x)", val, attr, cmp); break; } } return matched; } static inline EGLBoolean _eglIsConfigAttribValid(_EGLConfig *conf, EGLint attr) { if (_eglOffsetOfConfig(attr) < 0) return EGL_FALSE; switch (attr) { case EGL_Y_INVERTED_NOK: return conf->Display->Extensions.NOK_texture_from_pixmap; default: break; } return EGL_TRUE; } /** * Initialize a criteria config from the given attribute list. * Return EGL_FALSE if any of the attribute is invalid. */ EGLBoolean _eglParseConfigAttribList(_EGLConfig *conf, _EGLDisplay *dpy, const EGLint *attrib_list) { EGLint attr, val, i; _eglInitConfig(conf, dpy, EGL_DONT_CARE); /* reset to default values */ for (i = 0; i < ARRAY_SIZE(_eglValidationTable); i++) { attr = _eglValidationTable[i].attr; val = _eglValidationTable[i].default_value; _eglSetConfigKey(conf, attr, val); } /* parse the list */ for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i += 2) { attr = attrib_list[i]; val = attrib_list[i + 1]; if (!_eglIsConfigAttribValid(conf, attr)) return EGL_FALSE; _eglSetConfigKey(conf, attr, val); } if (!_eglValidateConfig(conf, EGL_TRUE)) return EGL_FALSE; /* EGL_LEVEL and EGL_MATCH_NATIVE_PIXMAP cannot be EGL_DONT_CARE */ if (conf->Level == EGL_DONT_CARE || conf->MatchNativePixmap == EGL_DONT_CARE) return EGL_FALSE; /* ignore other attributes when EGL_CONFIG_ID is given */ if (conf->ConfigID != EGL_DONT_CARE) { for (i = 0; i < ARRAY_SIZE(_eglValidationTable); i++) { attr = _eglValidationTable[i].attr; if (attr != EGL_CONFIG_ID) _eglSetConfigKey(conf, attr, EGL_DONT_CARE); } } else { if (!(conf->SurfaceType & EGL_WINDOW_BIT)) conf->NativeVisualType = EGL_DONT_CARE; if (conf->TransparentType == EGL_NONE) { conf->TransparentRedValue = EGL_DONT_CARE; conf->TransparentGreenValue = EGL_DONT_CARE; conf->TransparentBlueValue = EGL_DONT_CARE; } } return EGL_TRUE; } /** * Decide the ordering of conf1 and conf2, under the given criteria. * When compare_id is true, this implements the algorithm described * in "Sorting of EGLConfigs". When compare_id is false, * EGL_CONFIG_ID is not compared. * * It returns a negative integer if conf1 is considered to come * before conf2; a positive integer if conf2 is considered to come * before conf1; zero if the ordering cannot be decided. * * Note that EGL_NATIVE_VISUAL_TYPE is platform-dependent and is * ignored here. */ EGLint _eglCompareConfigs(const _EGLConfig *conf1, const _EGLConfig *conf2, const _EGLConfig *criteria, EGLBoolean compare_id) { const EGLint compare_attribs[] = { EGL_BUFFER_SIZE, EGL_SAMPLE_BUFFERS, EGL_SAMPLES, EGL_DEPTH_SIZE, EGL_STENCIL_SIZE, EGL_ALPHA_MASK_SIZE, }; EGLint val1, val2; EGLint i; if (conf1 == conf2) return 0; /* the enum values have the desired ordering */ assert(EGL_NONE < EGL_SLOW_CONFIG); assert(EGL_SLOW_CONFIG < EGL_NON_CONFORMANT_CONFIG); val1 = conf1->ConfigCaveat - conf2->ConfigCaveat; if (val1) return val1; /* the enum values have the desired ordering */ assert(EGL_RGB_BUFFER < EGL_LUMINANCE_BUFFER); val1 = conf1->ColorBufferType - conf2->ColorBufferType; if (val1) return val1; if (criteria) { val1 = val2 = 0; if (conf1->ColorBufferType == EGL_RGB_BUFFER) { if (criteria->RedSize > 0) { val1 += conf1->RedSize; val2 += conf2->RedSize; } if (criteria->GreenSize > 0) { val1 += conf1->GreenSize; val2 += conf2->GreenSize; } if (criteria->BlueSize > 0) { val1 += conf1->BlueSize; val2 += conf2->BlueSize; } } else { if (criteria->LuminanceSize > 0) { val1 += conf1->LuminanceSize; val2 += conf2->LuminanceSize; } } if (criteria->AlphaSize > 0) { val1 += conf1->AlphaSize; val2 += conf2->AlphaSize; } } else { /* assume the default criteria, which gives no specific ordering */ val1 = val2 = 0; } /* for color bits, larger one is preferred */ if (val1 != val2) return (val2 - val1); for (i = 0; i < ARRAY_SIZE(compare_attribs); i++) { val1 = _eglGetConfigKey(conf1, compare_attribs[i]); val2 = _eglGetConfigKey(conf2, compare_attribs[i]); if (val1 != val2) return (val1 - val2); } /* EGL_NATIVE_VISUAL_TYPE cannot be compared here */ return (compare_id) ? (conf1->ConfigID - conf2->ConfigID) : 0; } static inline void _eglSwapConfigs(const _EGLConfig **conf1, const _EGLConfig **conf2) { const _EGLConfig *tmp = *conf1; *conf1 = *conf2; *conf2 = tmp; } /** * Quick sort an array of configs. This differs from the standard * qsort() in that the compare function accepts an additional * argument. */ static void _eglSortConfigs(const _EGLConfig **configs, EGLint count, EGLint (*compare)(const _EGLConfig *, const _EGLConfig *, void *), void *priv_data) { const EGLint pivot = 0; EGLint i, j; if (count <= 1) return; _eglSwapConfigs(&configs[pivot], &configs[count / 2]); i = 1; j = count - 1; do { while (i < count && compare(configs[i], configs[pivot], priv_data) < 0) i++; while (compare(configs[j], configs[pivot], priv_data) > 0) j--; if (i < j) { _eglSwapConfigs(&configs[i], &configs[j]); i++; j--; } else if (i == j) { i++; j--; break; } } while (i <= j); _eglSwapConfigs(&configs[pivot], &configs[j]); _eglSortConfigs(configs, j, compare, priv_data); _eglSortConfigs(configs + i, count - i, compare, priv_data); } /** * A helper function for implementing eglChooseConfig. See _eglFilterArray and * _eglSortConfigs for the meanings of match and compare. */ EGLBoolean _eglFilterConfigArray(_EGLArray *array, EGLConfig *configs, EGLint config_size, EGLint *num_configs, EGLBoolean (*match)(const _EGLConfig *, void *), EGLint (*compare)(const _EGLConfig *, const _EGLConfig *, void *), void *priv_data) { _EGLConfig **configList; EGLint i, count; if (!num_configs) return _eglError(EGL_BAD_PARAMETER, "eglChooseConfigs"); /* get the number of matched configs */ count = _eglFilterArray(array, NULL, 0, (_EGLArrayForEach) match, priv_data); if (!count) { *num_configs = count; return EGL_TRUE; } configList = malloc(sizeof(*configList) * count); if (!configList) return _eglError(EGL_BAD_ALLOC, "eglChooseConfig(out of memory)"); /* get the matched configs */ _eglFilterArray(array, (void **) configList, count, (_EGLArrayForEach) match, priv_data); /* perform sorting of configs */ if (configs && count) { _eglSortConfigs((const _EGLConfig **) configList, count, compare, priv_data); count = MIN2(count, config_size); for (i = 0; i < count; i++) configs[i] = _eglGetConfigHandle(configList[i]); } free(configList); *num_configs = count; return EGL_TRUE; } static EGLBoolean _eglFallbackMatch(const _EGLConfig *conf, void *priv_data) { return _eglMatchConfig(conf, (const _EGLConfig *) priv_data); } static EGLint _eglFallbackCompare(const _EGLConfig *conf1, const _EGLConfig *conf2, void *priv_data) { return _eglCompareConfigs(conf1, conf2, (const _EGLConfig *) priv_data, EGL_TRUE); } /** * Typical fallback routine for eglChooseConfig */ EGLBoolean _eglChooseConfig(_EGLDriver *drv, _EGLDisplay *disp, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_configs) { _EGLConfig criteria; if (!_eglParseConfigAttribList(&criteria, disp, attrib_list)) return _eglError(EGL_BAD_ATTRIBUTE, "eglChooseConfig"); return _eglFilterConfigArray(disp->Configs, configs, config_size, num_configs, _eglFallbackMatch, _eglFallbackCompare, (void *) &criteria); } /** * Fallback for eglGetConfigAttrib. */ EGLBoolean _eglGetConfigAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, EGLint attribute, EGLint *value) { if (!_eglIsConfigAttribValid(conf, attribute)) return _eglError(EGL_BAD_ATTRIBUTE, "eglGetConfigAttrib"); /* nonqueryable attributes */ switch (attribute) { case EGL_MATCH_NATIVE_PIXMAP: return _eglError(EGL_BAD_ATTRIBUTE, "eglGetConfigAttrib"); break; default: break; } if (!value) return _eglError(EGL_BAD_PARAMETER, "eglGetConfigAttrib"); *value = _eglGetConfigKey(conf, attribute); return EGL_TRUE; } static EGLBoolean _eglFlattenConfig(void *elem, void *buffer) { _EGLConfig *conf = (_EGLConfig *) elem; EGLConfig *handle = (EGLConfig *) buffer; *handle = _eglGetConfigHandle(conf); return EGL_TRUE; } /** * Fallback for eglGetConfigs. */ EGLBoolean _eglGetConfigs(_EGLDriver *drv, _EGLDisplay *disp, EGLConfig *configs, EGLint config_size, EGLint *num_config) { if (!num_config) return _eglError(EGL_BAD_PARAMETER, "eglGetConfigs"); *num_config = _eglFlattenArray(disp->Configs, (void *) configs, sizeof(configs[0]), config_size, _eglFlattenConfig); return EGL_TRUE; }