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/*
* 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
* 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 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 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 "third_party/blink/renderer/modules/webgl/webgl_compressed_texture_s3tc.h"
#include "third_party/blink/renderer/modules/webgl/webgl_rendering_context_base.h"
namespace blink {
WebGLCompressedTextureS3TC::WebGLCompressedTextureS3TC(
WebGLRenderingContextBase* context)
: WebGLExtension(context) {
context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_EXT_texture_compression_s3tc");
context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_EXT_texture_compression_dxt1");
context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_ANGLE_texture_compression_dxt1");
context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_ANGLE_texture_compression_dxt3");
context->ExtensionsUtil()->EnsureExtensionEnabled(
"GL_ANGLE_texture_compression_dxt5");
context->AddCompressedTextureFormat(GL_COMPRESSED_RGB_S3TC_DXT1_EXT);
context->AddCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT);
context->AddCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT);
context->AddCompressedTextureFormat(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT);
}
WebGLExtensionName WebGLCompressedTextureS3TC::GetName() const {
return kWebGLCompressedTextureS3TCName;
}
bool WebGLCompressedTextureS3TC::Supported(WebGLRenderingContextBase* context) {
Extensions3DUtil* extensions_util = context->ExtensionsUtil();
// Paradoxically, ANGLE exposes GL_EXT_texture_compression_dxt1 and
// not GL_ANGLE_texture_compression_dxt1.
return extensions_util->SupportsExtension(
"GL_EXT_texture_compression_s3tc") ||
((extensions_util->SupportsExtension(
"GL_EXT_texture_compression_dxt1") ||
extensions_util->SupportsExtension(
"GL_ANGLE_texture_compression_dxt1")) &&
extensions_util->SupportsExtension(
"GL_ANGLE_texture_compression_dxt3") &&
extensions_util->SupportsExtension(
"GL_ANGLE_texture_compression_dxt5"));
}
const char* WebGLCompressedTextureS3TC::ExtensionName() {
return "WEBGL_compressed_texture_s3tc";
}
} // namespace blink
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