/** * EGL Configuration (pixel format) functions. */ #include #include #include #include #include "eglconfig.h" #include "egldisplay.h" #include "egldriver.h" #include "eglglobals.h" #include "egllog.h" #define MIN2(A, B) (((A) < (B)) ? (A) : (B)) #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) /** * 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 *config, EGLint id) { memset(config, 0, sizeof(*config)); /* some attributes take non-zero default values */ SET_CONFIG_ATTRIB(config, EGL_CONFIG_ID, id); SET_CONFIG_ATTRIB(config, EGL_CONFIG_CAVEAT, EGL_NONE); SET_CONFIG_ATTRIB(config, EGL_TRANSPARENT_TYPE, EGL_NONE); SET_CONFIG_ATTRIB(config, EGL_NATIVE_VISUAL_TYPE, EGL_NONE); #ifdef EGL_VERSION_1_2 SET_CONFIG_ATTRIB(config, EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER); #endif /* EGL_VERSION_1_2 */ } /** * Link a config to a 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 _eglAddConfig(_EGLDisplay *dpy, _EGLConfig *conf) { _EGLConfig **configs; /* sanity check */ assert(GET_CONFIG_ATTRIB(conf, EGL_CONFIG_ID) > 0); configs = dpy->Configs; if (dpy->NumConfigs >= dpy->MaxConfigs) { EGLint new_size = dpy->MaxConfigs + 16; assert(dpy->NumConfigs < new_size); configs = realloc(dpy->Configs, new_size * sizeof(dpy->Configs[0])); if (!configs) return (EGLConfig) NULL; dpy->Configs = configs; dpy->MaxConfigs = new_size; } conf->Display = dpy; dpy->Configs[dpy->NumConfigs++] = conf; return (EGLConfig) conf; } #ifndef _EGL_SKIP_HANDLE_CHECK EGLBoolean _eglCheckConfigHandle(EGLConfig config, _EGLDisplay *dpy) { EGLint num_configs = (dpy) ? dpy->NumConfigs : 0; EGLint i; for (i = 0; i < num_configs; i++) { _EGLConfig *conf = dpy->Configs[i]; if (conf == (_EGLConfig *) config) { assert(conf->Display == dpy); break; } } return (i < num_configs); } #endif /* _EGL_SKIP_HANDLE_CHECK */ 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[] = { { 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 }, /* these are not real attributes */ { EGL_MATCH_NATIVE_PIXMAP, ATTRIB_TYPE_PSEUDO, ATTRIB_CRITERION_SPECIAL, EGL_NONE }, { EGL_PRESERVED_RESOURCES, ATTRIB_TYPE_PSEUDO, ATTRIB_CRITERION_IGNORE, 0 }, { EGL_NONE, ATTRIB_TYPE_PSEUDO, ATTRIB_CRITERION_IGNORE, 0 } }; /** * 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; EGLint red_size = 0, green_size = 0, blue_size = 0, luminance_size = 0; EGLint alpha_size = 0, buffer_size = 0; /* all attributes should have been listed */ assert(ARRAY_SIZE(_eglValidationTable) == _EGL_CONFIG_NUM_ATTRIBS); /* check attributes by their types */ for (i = 0; i < ARRAY_SIZE(_eglValidationTable); i++) { EGLint mask; attr = _eglValidationTable[i].attr; val = GET_CONFIG_ATTRIB(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) valid = EGL_FALSE; break; case EGL_RED_SIZE: red_size = val; break; case EGL_GREEN_SIZE: green_size = val; break; case EGL_BLUE_SIZE: blue_size = val; break; case EGL_LUMINANCE_SIZE: luminance_size = val; break; case EGL_ALPHA_SIZE: alpha_size = val; break; case EGL_BUFFER_SIZE: buffer_size = val; break; } if (val < 0) valid = EGL_FALSE; 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_SCREEN_BIT_MESA | /* XXX should check the extension */ 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_BIT; break; default: assert(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) break; } /* any invalid attribute value should have been catched */ if (!valid || for_matching) return valid; /* now check for conflicting attribute values */ switch (GET_CONFIG_ATTRIB(conf, EGL_COLOR_BUFFER_TYPE)) { case EGL_RGB_BUFFER: if (luminance_size) valid = EGL_FALSE; if (red_size + green_size + blue_size + alpha_size != buffer_size) valid = EGL_FALSE; break; case EGL_LUMINANCE_BUFFER: if (red_size || green_size || blue_size) valid = EGL_FALSE; if (luminance_size + alpha_size != buffer_size) valid = EGL_FALSE; break; } val = GET_CONFIG_ATTRIB(conf, EGL_SAMPLE_BUFFERS); if (!val && GET_CONFIG_ATTRIB(conf, EGL_SAMPLES)) valid = EGL_FALSE; val = GET_CONFIG_ATTRIB(conf, EGL_SURFACE_TYPE); if (!(val & EGL_WINDOW_BIT)) { if (GET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_ID) != 0 || GET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_TYPE) != EGL_NONE) valid = EGL_FALSE; } if (!(val & EGL_PBUFFER_BIT)) { if (GET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGB) || GET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGBA)) valid = 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 = GET_CONFIG_ATTRIB(criteria, attr); if (cmp == EGL_DONT_CARE) continue; val = GET_CONFIG_ATTRIB(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) break; } return matched; } /** * Initialize a criteria config from the given attribute list. * Return EGL_FALSE if any of the attribute is invalid. */ EGLBoolean _eglParseConfigAttribList(_EGLConfig *conf, const EGLint *attrib_list) { EGLint attr, val, i; EGLint config_id = 0, level = 0; EGLBoolean has_native_visual_type = EGL_FALSE; EGLBoolean has_transparent_color = EGL_FALSE; /* reset to default values */ for (i = 0; i < ARRAY_SIZE(_eglValidationTable); i++) { attr = _eglValidationTable[i].attr; val = _eglValidationTable[i].default_value; SET_CONFIG_ATTRIB(conf, attr, val); } /* parse the list */ for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i += 2) { EGLint idx; attr = attrib_list[i]; val = attrib_list[i + 1]; idx = _eglIndexConfig(conf, attr); if (idx < 0) return EGL_FALSE; conf->Storage[idx] = val; /* rememeber some attributes for post-processing */ switch (attr) { case EGL_CONFIG_ID: config_id = val; break; case EGL_LEVEL: level = val; break; case EGL_NATIVE_VISUAL_TYPE: has_native_visual_type = EGL_TRUE; break; case EGL_TRANSPARENT_RED_VALUE: case EGL_TRANSPARENT_GREEN_VALUE: case EGL_TRANSPARENT_BLUE_VALUE: has_transparent_color = EGL_TRUE; break; default: break; } } if (!_eglValidateConfig(conf, EGL_TRUE)) return EGL_FALSE; /* the spec says that EGL_LEVEL cannot be EGL_DONT_CARE */ if (level == EGL_DONT_CARE) return EGL_FALSE; /* ignore other attributes when EGL_CONFIG_ID is given */ if (config_id > 0) { _eglResetConfigKeys(conf, EGL_DONT_CARE); SET_CONFIG_ATTRIB(conf, EGL_CONFIG_ID, config_id); } else { if (has_native_visual_type) { val = GET_CONFIG_ATTRIB(conf, EGL_SURFACE_TYPE); if (!(val & EGL_WINDOW_BIT)) SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_TYPE, EGL_DONT_CARE); } if (has_transparent_color) { val = GET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_TYPE); if (val == EGL_NONE) { SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_RED_VALUE, EGL_DONT_CARE); SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_GREEN_VALUE, EGL_DONT_CARE); SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_BLUE_VALUE, 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; EGLBoolean rgb_buffer; 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 = GET_CONFIG_ATTRIB(conf1, EGL_CONFIG_CAVEAT); val2 = GET_CONFIG_ATTRIB(conf2, EGL_CONFIG_CAVEAT); if (val1 != val2) return (val1 - val2); /* the enum values have the desired ordering */ assert(EGL_RGB_BUFFER < EGL_LUMINANCE_BUFFER); val1 = GET_CONFIG_ATTRIB(conf1, EGL_COLOR_BUFFER_TYPE); val2 = GET_CONFIG_ATTRIB(conf2, EGL_COLOR_BUFFER_TYPE); if (val1 != val2) return (val1 - val2); rgb_buffer = (val1 == EGL_RGB_BUFFER); if (criteria) { val1 = val2 = 0; if (rgb_buffer) { if (GET_CONFIG_ATTRIB(criteria, EGL_RED_SIZE) > 0) { val1 += GET_CONFIG_ATTRIB(conf1, EGL_RED_SIZE); val2 += GET_CONFIG_ATTRIB(conf2, EGL_RED_SIZE); } if (GET_CONFIG_ATTRIB(criteria, EGL_GREEN_SIZE) > 0) { val1 += GET_CONFIG_ATTRIB(conf1, EGL_GREEN_SIZE); val2 += GET_CONFIG_ATTRIB(conf2, EGL_GREEN_SIZE); } if (GET_CONFIG_ATTRIB(criteria, EGL_BLUE_SIZE) > 0) { val1 += GET_CONFIG_ATTRIB(conf1, EGL_BLUE_SIZE); val2 += GET_CONFIG_ATTRIB(conf2, EGL_BLUE_SIZE); } } else { if (GET_CONFIG_ATTRIB(criteria, EGL_LUMINANCE_SIZE) > 0) { val1 += GET_CONFIG_ATTRIB(conf1, EGL_LUMINANCE_SIZE); val2 += GET_CONFIG_ATTRIB(conf2, EGL_LUMINANCE_SIZE); } } if (GET_CONFIG_ATTRIB(criteria, EGL_ALPHA_SIZE) > 0) { val1 += GET_CONFIG_ATTRIB(conf1, EGL_ALPHA_SIZE); val2 += GET_CONFIG_ATTRIB(conf2, EGL_ALPHA_SIZE); } } 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 = GET_CONFIG_ATTRIB(conf1, compare_attribs[i]); val2 = GET_CONFIG_ATTRIB(conf2, compare_attribs[i]); if (val1 != val2) return (val1 - val2); } /* EGL_NATIVE_VISUAL_TYPE cannot be compared here */ if (compare_id) { val1 = GET_CONFIG_ATTRIB(conf1, EGL_CONFIG_ID); val2 = GET_CONFIG_ATTRIB(conf2, EGL_CONFIG_ID); assert(val1 != val2); } else { val1 = val2 = 0; } return (val1 - val2); } 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. */ 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); } static int _eglFallbackCompare(const _EGLConfig *conf1, const _EGLConfig *conf2, void *priv_data) { const _EGLConfig *criteria = (const _EGLConfig *) priv_data; return _eglCompareConfigs(conf1, conf2, criteria, 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 **configList, criteria; EGLint i, count; if (!num_configs) return _eglError(EGL_BAD_PARAMETER, "eglChooseConfigs"); _eglInitConfig(&criteria, 0); if (!_eglParseConfigAttribList(&criteria, attrib_list)) return _eglError(EGL_BAD_ATTRIBUTE, "eglChooseConfig"); /* allocate array of config pointers */ configList = (_EGLConfig **) malloc(disp->NumConfigs * sizeof(_EGLConfig *)); if (!configList) return _eglError(EGL_BAD_ALLOC, "eglChooseConfig(out of memory)"); /* perform selection of configs */ count = 0; for (i = 0; i < disp->NumConfigs; i++) { if (_eglMatchConfig(disp->Configs[i], &criteria)) configList[count++] = disp->Configs[i]; } /* perform sorting of configs */ if (configs && count) { _eglSortConfigs((const _EGLConfig **) configList, count, _eglFallbackCompare, (void *) &criteria); 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 INLINE EGLBoolean _eglIsConfigAttribValid(_EGLConfig *conf, EGLint attr) { if (_eglIndexConfig(conf, attr) < 0) return EGL_FALSE; /* there are some holes in the range */ switch (attr) { case EGL_PRESERVED_RESOURCES: case EGL_NONE: #ifdef EGL_VERSION_1_4 case EGL_MATCH_NATIVE_PIXMAP: #endif return EGL_FALSE; default: break; } return EGL_TRUE; } /** * 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"); if (!value) return _eglError(EGL_BAD_PARAMETER, "eglGetConfigAttrib"); *value = GET_CONFIG_ATTRIB(conf, attribute); 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"); if (configs) { EGLint i; *num_config = MIN2(disp->NumConfigs, config_size); for (i = 0; i < *num_config; i++) configs[i] = _eglGetConfigHandle(disp->Configs[i]); } else { /* just return total number of supported configs */ *num_config = disp->NumConfigs; } return EGL_TRUE; }