text: /*
   * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
   * Copyright (C) 2007 Holger Hans Peter Freyther <zecke@selfish.org>
   * Copyright (C) 2008, 2009 Dirk Schulze <krit@webkit.org>
   * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
   * Copyright (C) 2020 Apple 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 INC. ``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 INC. OR
   * 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.
   */
  
  #pragma once
  
  #if USE(CAIRO) && ENABLE(ACCELERATED_2D_CANVAS)
  
  #include "ImageBufferCairoSurfaceBackend.h"
  #include <wtf/IsoMalloc.h>
  
  #if USE(NICOSIA)
  #include "NicosiaContentLayerTextureMapperImpl.h"
  #else
  #include "PlatformLayer.h"
  #endif
  
  namespace WebCore {
  
  class ImageBufferCairoGLSurfaceBackend
  #if USE(NICOSIA)
      : public Nicosia::ContentLayerTextureMapperImpl::Client
  #else
      : public PlatformLayer
  #endif
      , public ImageBufferCairoSurfaceBackend {
      WTF_MAKE_ISO_ALLOCATED(ImageBufferCairoGLSurfaceBackend);
      WTF_MAKE_NONCOPYABLE(ImageBufferCairoGLSurfaceBackend);
  public:
      static std::unique_ptr<ImageBufferCairoGLSurfaceBackend> create(const FloatSize&, float resolutionScale, ColorSpace, const HostWindow*);
      static std::unique_ptr<ImageBufferCairoGLSurfaceBackend> create(const FloatSize&, const GraphicsContext&);
  
      ~ImageBufferCairoGLSurfaceBackend();
  
      PlatformLayer* platformLayer() const override;
      bool copyToPlatformTexture(GCGLenum target, PlatformGLObject destinationTexture, GCGLenum internalformat, bool premultiplyAlpha, bool flipY) override;
  
  private:
      ImageBufferCairoGLSurfaceBackend(const FloatSize& logicalSize, const IntSize& backendSize, float resolutionScale, ColorSpace, RefPtr<cairo_surface_t>&&);
  
  #if USE(COORDINATED_GRAPHICS)
      void createCompositorBuffer();
      void swapBuffersIfNeeded() override;
  #if !USE(NICOSIA)
      RefPtr<TextureMapperPlatformLayerProxy> proxy() const override { return m_platformLayerProxy.copyRef(); }
  #endif
  #else
      void paintToTextureMapper(TextureMapper&, const FloatRect& target, const TransformationMatrix&, float opacity);
  #endif
  
  #if USE(COORDINATED_GRAPHICS)
  #if USE(NICOSIA)
      RefPtr<Nicosia::ContentLayer> m_nicosiaLayer;
  #else
      RefPtr<TextureMapperPlatformLayerProxy> m_platformLayerProxy;
  #endif
      uint32_t m_texture;
      RefPtr<cairo_surface_t> m_compositorSurface;
      RefPtr<cairo_t> m_compositorCr;
      uint32_t m_compositorTexture { 0 };
  #endif
      uint32_t m_texture { 0 };
  };
  
  } // namespace WebCore
  
  #endif // USE(CAIRO) && ENABLE(ACCELERATED_2D_CANVAS)
  