/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
* 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 <stdlib.h>
#include <string.h>
#include <assert.h>
#include "c99_compat.h"
#include "util/macros.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;
conf->ComponentType = EGL_COLOR_COMPONENT_TYPE_FIXED_EXT;
}
/**
* 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 type {
ATTRIB_TYPE_INTEGER,
ATTRIB_TYPE_BOOLEAN,
ATTRIB_TYPE_BITMASK,
ATTRIB_TYPE_ENUM,
ATTRIB_TYPE_PSEUDO, /* non-queryable */
ATTRIB_TYPE_PLATFORM, /* platform-dependent */
};
enum criterion {
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;
enum type type;
enum criterion 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 },
{ EGL_FRAMEBUFFER_TARGET_ANDROID, ATTRIB_TYPE_BOOLEAN,
ATTRIB_CRITERION_EXACT,
EGL_DONT_CARE },
{ EGL_RECORDABLE_ANDROID, ATTRIB_TYPE_BOOLEAN,
ATTRIB_CRITERION_EXACT,
EGL_DONT_CARE },
{ EGL_COLOR_COMPONENT_TYPE_EXT, ATTRIB_TYPE_ENUM,
ATTRIB_CRITERION_EXACT,
EGL_COLOR_COMPONENT_TYPE_FIXED_EXT },
};
/**
* 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;
case EGL_COLOR_COMPONENT_TYPE_EXT:
if (val != EGL_COLOR_COMPONENT_TYPE_FIXED_EXT &&
val != EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT)
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;
}
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;
case ATTRIB_CRITERION_IGNORE:
unreachable("already handled above");
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;
case EGL_FRAMEBUFFER_TARGET_ANDROID:
return conf->Display->Extensions.ANDROID_framebuffer_target;
case EGL_RECORDABLE_ANDROID:
return conf->Display->Extensions.ANDROID_recordable;
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 */
STATIC_ASSERT(EGL_NONE < EGL_SLOW_CONFIG);
STATIC_ASSERT(EGL_SLOW_CONFIG < EGL_NON_CONFORMANT_CONFIG);
val1 = conf1->ConfigCaveat - conf2->ConfigCaveat;
if (val1)
return val1;
/* the enum values have the desired ordering */
STATIC_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, "eglChooseConfig");
/* 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;
}