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/*
* Copyright (C) 2017 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "TextureMapperContextAttributes.h"
#if USE(TEXTURE_MAPPER_GL)
#include "TextureMapperGLHeaders.h"
#include <mutex>
#include <wtf/ThreadSpecific.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
static ThreadSpecific<TextureMapperContextAttributes>& threadSpecificAttributes()
{
static ThreadSpecific<TextureMapperContextAttributes>* s_textureMapperContextAttributes;
static std::once_flag s_onceFlag;
std::call_once(s_onceFlag,
[] {
s_textureMapperContextAttributes = new ThreadSpecific<TextureMapperContextAttributes>;
});
return *s_textureMapperContextAttributes;
}
const TextureMapperContextAttributes& TextureMapperContextAttributes::get()
{
auto& attributes = *threadSpecificAttributes();
if (!attributes.initialized) {
attributes.initialized = true;
attributes.isGLES2Compliant = true;
auto extensionsString = String::fromLatin1(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS)));
attributes.supportsNPOTTextures = extensionsString.contains("GL_OES_texture_npot"_s);
attributes.supportsUnpackSubimage = extensionsString.contains("GL_EXT_unpack_subimage"_s);
}
return attributes;
}
} // namespace WebCore
#endif // USE(TEXTURE_MAPPER_GL)
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