Source/WebCore/platform/graphics/angle/ExtensionsGLANGLE.h

/*
 * Copyright (C) 2019 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;
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "ExtensionsGL.h"

#include <wtf/HashSet.h>
#include <wtf/text/StringHash.h>

namespace WebCore {

class GraphicsContextGLOpenGL;

class ExtensionsGLANGLE : public ExtensionsGL {
    WTF_MAKE_FAST_ALLOCATED;
public:
    // This class only needs to be instantiated by GraphicsContextGLOpenGL implementations.
    explicit ExtensionsGLANGLE(GraphicsContextGLOpenGL*);
    virtual ~ExtensionsGLANGLE();

    // ExtensionsGL methods.
    bool supports(const String&) override;
    void ensureEnabled(const String&) override;
    bool isEnabled(const String&) override;
    GCGLint getGraphicsResetStatusARB() override;

    void drawBuffersEXT(GCGLSpan<const GCGLenum>) override;

    String getTranslatedShaderSourceANGLE(PlatformGLObject) override;

    // Only for non-WebGL 2.0 contexts.
    GCGLenum adjustWebGL1TextureInternalFormat(GCGLenum internalformat, GCGLenum format, GCGLenum type);

private:
    bool supportsExtension(const String&);
    String getExtensions();

    virtual void initializeAvailableExtensions();
    bool m_initializedAvailableExtensions;
    HashSet<String> m_availableExtensions;
    HashSet<String> m_requestableExtensions;
    HashSet<String> m_enabledExtensions;

    // Weak pointer back to GraphicsContextGLOpenGL.
    GraphicsContextGLOpenGL* m_context;

    // Whether the WebGL 1.0-related floating-point renderability extensions have been enabled.
    bool m_webglColorBufferFloatRGB { false };
    bool m_webglColorBufferFloatRGBA { false };
};

} // namespace WebCore