Source/core/html/canvas/WebGLCompressedTextureS3TC.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * 1.  Redistributions of source code must retain the above copyright
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 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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#include "config.h"

#include "core/html/canvas/WebGLCompressedTextureS3TC.h"

#include "core/html/canvas/WebGLRenderingContext.h"
#include "core/platform/graphics/Extensions3D.h"

namespace WebCore {

WebGLCompressedTextureS3TC::WebGLCompressedTextureS3TC(WebGLRenderingContext* context)
    : WebGLExtension(context)
{
    ScriptWrappable::init(this);
    context->addCompressedTextureFormat(Extensions3D::COMPRESSED_RGB_S3TC_DXT1_EXT);
    context->addCompressedTextureFormat(Extensions3D::COMPRESSED_RGBA_S3TC_DXT1_EXT);
    context->addCompressedTextureFormat(Extensions3D::COMPRESSED_RGBA_S3TC_DXT3_EXT);
    context->addCompressedTextureFormat(Extensions3D::COMPRESSED_RGBA_S3TC_DXT5_EXT);
}

WebGLCompressedTextureS3TC::~WebGLCompressedTextureS3TC()
{
}

WebGLExtension::ExtensionName WebGLCompressedTextureS3TC::name() const
{
    return WebGLCompressedTextureS3TCName;
}

PassRefPtr<WebGLCompressedTextureS3TC> WebGLCompressedTextureS3TC::create(WebGLRenderingContext* context)
{
    return adoptRef(new WebGLCompressedTextureS3TC(context));
}

bool WebGLCompressedTextureS3TC::supported(WebGLRenderingContext* context)
{
    Extensions3D* extensions = context->graphicsContext3D()->extensions();
    return extensions->supports("GL_EXT_texture_compression_s3tc")
        || (extensions->supports("GL_EXT_texture_compression_dxt1")
            && extensions->supports("GL_CHROMIUM_texture_compression_dxt3")
            && extensions->supports("GL_CHROMIUM_texture_compression_dxt5"));
}

const char* WebGLCompressedTextureS3TC::extensionName()
{
    return "WEBGL_compressed_texture_s3tc";
}

} // namespace WebCore