Implement WEBGL_compressed_texture_s3tc_srgb

third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureS3TCsRGB.cpp

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/webgl/WebGLCompressedTextureS3TCsRGB.h"
+
+#include "modules/webgl/WebGLRenderingContextBase.h"
+
+namespace blink {
+
+WebGLCompressedTextureS3TCsRGB::WebGLCompressedTextureS3TCsRGB(WebGLRenderingContextBase* context)
+    : WebGLExtension(context)
+{
+    // TODO(kainino): update these with _EXT versions once
+    // GL_EXT_compressed_texture_s3tc_srgb is ratified
+    context->addCompressedTextureFormat(GL_COMPRESSED_SRGB_S3TC_DXT1_NV);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_NV);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_NV);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_NV);
+}
+
+WebGLCompressedTextureS3TCsRGB::~WebGLCompressedTextureS3TCsRGB()
+{
+}
+
+WebGLExtensionName WebGLCompressedTextureS3TCsRGB::name() const
+{
+    return WebGLCompressedTextureS3TCsRGBName;
+}
+
+WebGLCompressedTextureS3TCsRGB* WebGLCompressedTextureS3TCsRGB::create(WebGLRenderingContextBase* context)
+{
+    return new WebGLCompressedTextureS3TCsRGB(context);
+}
+
+bool WebGLCompressedTextureS3TCsRGB::supported(WebGLRenderingContextBase* context)
+{
+    Extensions3DUtil* extensionsUtil = context->extensionsUtil();
+    return extensionsUtil->supportsExtension("GL_EXT_texture_compression_s3tc_srgb");
+}
+
+const char* WebGLCompressedTextureS3TCsRGB::extensionName()
+{
+    return "WEBGL_compressed_texture_s3tc_srgb";
+}
+
+} // namespace blink