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/*
* Copyright (C) 2021-2023 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. 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 INC. 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.
*/
#pragma once
#include "GPU.h"
#include "GPUBasedCanvasRenderingContext.h"
#include "GPUCanvasConfiguration.h"
#include "GPUCanvasContext.h"
#include "GPUPresentationContext.h"
#include "GPUTexture.h"
#include "GraphicsLayerContentsDisplayDelegate.h"
#include "HTMLCanvasElement.h"
#include "IOSurface.h"
#include "OffscreenCanvas.h"
#include "PlatformCALayer.h"
#include <wtf/MachSendRight.h>
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class Document;
class GPUDisplayBufferDisplayDelegate;
class GPUCanvasContextCocoa final : public GPUCanvasContext {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(GPUCanvasContextCocoa);
public:
#if ENABLE(OFFSCREEN_CANVAS)
using CanvasType = Variant<RefPtr<HTMLCanvasElement>, RefPtr<OffscreenCanvas>>;
#else
using CanvasType = Variant<RefPtr<HTMLCanvasElement>>;
#endif
static std::unique_ptr<GPUCanvasContextCocoa> create(CanvasBase&, GPU&, Document*);
DestinationColorSpace colorSpace() const override;
bool compositingResultsNeedUpdating() const override { return m_compositingResultsNeedsUpdating; }
RefPtr<GraphicsLayerContentsDisplayDelegate> layerContentsDisplayDelegate() override;
bool needsPreparationForDisplay() const override { return true; }
void prepareForDisplay() override;
ImageBufferPixelFormat pixelFormat() const override;
bool isOpaque() const override;
void reshape() override;
RefPtr<ImageBuffer> surfaceBufferToImageBuffer(SurfaceBuffer) override;
// GPUCanvasContext methods:
CanvasType canvas() override;
ExceptionOr<void> configure(GPUCanvasConfiguration&&) override;
void unconfigure() override;
std::optional<GPUCanvasConfiguration> getConfiguration() const override;
ExceptionOr<RefPtr<GPUTexture>> getCurrentTexture() override;
RefPtr<ImageBuffer> transferToImageBuffer() override;
#if HAVE(SUPPORT_HDR_DISPLAY) && ENABLE(PIXEL_FORMAT_RGBA16F)
void setDynamicRangeLimit(PlatformDynamicRangeLimit) override;
std::optional<double> getEffectiveDynamicRangeLimitValue() const override;
#endif
private:
explicit GPUCanvasContextCocoa(CanvasBase&, Ref<GPUCompositorIntegration>&&, Ref<GPUPresentationContext>&&, Document*);
void markContextChangedAndNotifyCanvasObservers();
bool isConfigured() const
{
return static_cast<bool>(m_configuration);
}
CanvasType htmlOrOffscreenCanvas() const;
ExceptionOr<void> configure(GPUCanvasConfiguration&&, bool);
void present(uint32_t frameIndex);
#if HAVE(SUPPORT_HDR_DISPLAY)
float computeContentsHeadroom();
void updateContentsHeadroom();
void updateScreenHeadroom(float, bool suppressEDR);
void updateScreenHeadroomFromScreenProperties();
#endif // HAVE(SUPPORT_HDR_DISPLAY)
struct Configuration {
Ref<GPUDevice> device;
GPUTextureFormat format { GPUTextureFormat::R8unorm };
GPUTextureUsageFlags usage { GPUTextureUsage::RENDER_ATTACHMENT };
Vector<GPUTextureFormat> viewFormats;
GPUPredefinedColorSpace colorSpace { GPUPredefinedColorSpace::SRGB };
GPUCanvasToneMapping toneMapping;
GPUCanvasAlphaMode compositingAlphaMode { GPUCanvasAlphaMode::Opaque };
Vector<MachSendRight> renderBuffers;
unsigned frameCount { 0 };
};
std::optional<Configuration> m_configuration;
const Ref<GPUDisplayBufferDisplayDelegate> m_layerContentsDisplayDelegate;
const Ref<GPUCompositorIntegration> m_compositorIntegration;
const Ref<GPUPresentationContext> m_presentationContext;
RefPtr<GPUTexture> m_currentTexture;
GPUIntegerCoordinate m_width { 0 };
GPUIntegerCoordinate m_height { 0 };
#if HAVE(SUPPORT_HDR_DISPLAY)
using ScreenPropertiesChangedObserver = Observer<void(PlatformDisplayID)>;
std::optional<ScreenPropertiesChangedObserver> m_screenPropertiesChangedObserver;
PlatformDynamicRangeLimit m_dynamicRangeLimit { PlatformDynamicRangeLimit::initialValue() };
float m_currentEDRHeadroom { 1 };
bool m_suppressEDR { false };
#endif // HAVE(SUPPORT_HDR_DISPLAY)
bool m_compositingResultsNeedsUpdating { false };
};
} // namespace WebCore
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