1/*
2 * Copyright (C) 2017 Igalia S.L.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "TextureMapperContextAttributes.h"
28
29#if USE(TEXTURE_MAPPER_GL)
30
31#include "TextureMapperGLHeaders.h"
32#include <mutex>
33#include <wtf/ThreadSpecific.h>
34#include <wtf/text/WTFString.h>
35
36namespace WebCore {
37
38static WTF::ThreadSpecific<TextureMapperContextAttributes>& threadSpecificAttributes()
39{
40 static WTF::ThreadSpecific<TextureMapperContextAttributes>* s_textureMapperContextAttributes;
41 static std::once_flag s_onceFlag;
42 std::call_once(s_onceFlag,
43 [] {
44 s_textureMapperContextAttributes = new WTF::ThreadSpecific<TextureMapperContextAttributes>;
45 });
46 return *s_textureMapperContextAttributes;
47}
48
49const TextureMapperContextAttributes& TextureMapperContextAttributes::get()
50{
51 auto& attributes = *threadSpecificAttributes();
52 if (!attributes.initialized) {
53 attributes.initialized = true;
54#if USE(OPENGL_ES)
55 attributes.isGLES2Compliant = true;
56
57 String extensionsString(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS)));
58 attributes.supportsNPOTTextures = extensionsString.contains("GL_OES_texture_npot"_s);
59 attributes.supportsUnpackSubimage = extensionsString.contains("GL_EXT_unpack_subimage"_s);
60#else
61 attributes.isGLES2Compliant = false;
62 attributes.supportsNPOTTextures = true;
63 attributes.supportsUnpackSubimage = true;
64#endif
65 }
66 return attributes;
67}
68
69} // namespace WebCore
70
71#endif // USE(TEXTURE_MAPPER_GL)
72