third_party/blink/renderer/modules/webgl/oes_texture_float.cc

/*
 * Copyright (C) 2010 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/oes_texture_float.h"

namespace blink {

OESTextureFloat::OESTextureFloat(WebGLRenderingContextBase* context)
    : WebGLExtension(context) {
  if (context->ExtensionsUtil()->EnsureExtensionEnabled(
          "GL_OES_texture_float")) {
    // Implicitly enable rendering to float textures
    context->ExtensionsUtil()->EnsureExtensionEnabled(
        "GL_CHROMIUM_color_buffer_float_rgba");
    context->ExtensionsUtil()->EnsureExtensionEnabled(
        "GL_CHROMIUM_color_buffer_float_rgb");

    // https://github.com/KhronosGroup/WebGL/pull/2830
    // Spec requires EXT_float_blend needs to be turned on implicitly here
    context->ExtensionsUtil()->EnsureExtensionEnabled("GL_EXT_float_blend");
  }
}

WebGLExtensionName OESTextureFloat::GetName() const {
  return kOESTextureFloatName;
}

OESTextureFloat* OESTextureFloat::Create(WebGLRenderingContextBase* context) {
  return MakeGarbageCollected<OESTextureFloat>(context);
}

bool OESTextureFloat::Supported(WebGLRenderingContextBase* context) {
  return context->ExtensionsUtil()->SupportsExtension("GL_OES_texture_float");
}

const char* OESTextureFloat::ExtensionName() {
  return "OES_texture_float";
}

}  // namespace blink