Implement WEBGL_compressed_texture_es3_0 extension for WebGL 1/2

third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureES30.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/WebGLCompressedTextureES30.h"
+
+#include "modules/webgl/WebGLRenderingContextBase.h"
+
+namespace blink {
+
+WebGLCompressedTextureES30::WebGLCompressedTextureES30(WebGLRenderingContextBase* context)
+    : WebGLExtension(context)
+{
+    context->addCompressedTextureFormat(GL_COMPRESSED_R11_EAC);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SIGNED_R11_EAC);
+    context->addCompressedTextureFormat(GL_COMPRESSED_RGB8_ETC2);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SRGB8_ETC2);
+    context->addCompressedTextureFormat(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2);
+    context->addCompressedTextureFormat(GL_COMPRESSED_RG11_EAC);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SIGNED_RG11_EAC);
+    context->addCompressedTextureFormat(GL_COMPRESSED_RGBA8_ETC2_EAC);
+    context->addCompressedTextureFormat(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC);
+}
+
+WebGLCompressedTextureES30::~WebGLCompressedTextureES30()
+{
+}
+
+WebGLExtensionName WebGLCompressedTextureES30::name() const
+{
+    return WebGLCompressedTextureES30Name;
+}
+
+WebGLCompressedTextureES30* WebGLCompressedTextureES30::create(WebGLRenderingContextBase* context)
+{
+    return new WebGLCompressedTextureES30(context);
+}
+
+bool WebGLCompressedTextureES30::supported(WebGLRenderingContextBase* context)
+{
+    Extensions3DUtil* extensionsUtil = context->extensionsUtil();
+    return extensionsUtil->supportsExtension("GL_CHROMIUM_compressed_texture_es3_0");
+}
+
+const char* WebGLCompressedTextureES30::extensionName()
+{
+    return "WEBGL_compressed_texture_es3_0";
+}
+
+} // namespace blink