1/*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27
28#include "core/html/canvas/WebGLCompressedTextureS3TC.h"
29
30#include "core/html/canvas/WebGLRenderingContextBase.h"
31
32namespace WebCore {
33
34WebGLCompressedTextureS3TC::WebGLCompressedTextureS3TC(WebGLRenderingContextBase* context)
35    : WebGLExtension(context)
36{
37    ScriptWrappable::init(this);
38    context->addCompressedTextureFormat(GL_COMPRESSED_RGB_S3TC_DXT1_EXT);
39    context->addCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT);
40    context->addCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT);
41    context->addCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT);
42}
43
44WebGLCompressedTextureS3TC::~WebGLCompressedTextureS3TC()
45{
46}
47
48WebGLExtensionName WebGLCompressedTextureS3TC::name() const
49{
50    return WebGLCompressedTextureS3TCName;
51}
52
53PassRefPtr<WebGLCompressedTextureS3TC> WebGLCompressedTextureS3TC::create(WebGLRenderingContextBase* context)
54{
55    return adoptRef(new WebGLCompressedTextureS3TC(context));
56}
57
58bool WebGLCompressedTextureS3TC::supported(WebGLRenderingContextBase* context)
59{
60    Extensions3DUtil* extensionsUtil = context->extensionsUtil();
61    return extensionsUtil->supportsExtension("GL_EXT_texture_compression_s3tc")
62        || (extensionsUtil->supportsExtension("GL_EXT_texture_compression_dxt1")
63            && extensionsUtil->supportsExtension("GL_CHROMIUM_texture_compression_dxt3")
64            && extensionsUtil->supportsExtension("GL_CHROMIUM_texture_compression_dxt5"));
65}
66
67const char* WebGLCompressedTextureS3TC::extensionName()
68{
69    return "WEBGL_compressed_texture_s3tc";
70}
71
72} // namespace WebCore
73