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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_METAL_UTIL_HDR_COPIER_LAYER_H_
#define COMPONENTS_METAL_UTIL_HDR_COPIER_LAYER_H_
#include <IOSurface/IOSurfaceRef.h>
#include <optional>
#include "components/metal_util/metal_util_export.h"
#include "ui/gfx/hdr_metadata.h"
namespace gfx {
class ColorSpace;
struct HDRMetadata;
} // namespace gfx
@class CALayer;
@protocol MTLDevice;
namespace metal {
// Return true if we should use the HDRCopier for the specified content.
bool METAL_UTIL_EXPORT ShouldUseHDRCopier(IOSurfaceRef buffer,
const gfx::HDRMetadata& hdr_metadata,
const gfx::ColorSpace& color_space);
// Create a layer which may have its contents set an HDR IOSurface via
// UpdateHDRCopierLayer.
CALayer* METAL_UTIL_EXPORT MakeHDRCopierLayer();
// Update the contents of |layer| to the specified IOSurface and color space.
// If `metal_device` is non-zero, then it is the MTLDevice that the
// CAMetaLLayer should be set to. Set |screen_hdr_headroom| to the HDR headroom
// of the screen this layer is being displayed on.
void METAL_UTIL_EXPORT
UpdateHDRCopierLayer(CALayer* layer,
IOSurfaceRef buffer,
id<MTLDevice> device,
float screen_hdr_headroom,
const gfx::ColorSpace& color_space,
const std::optional<gfx::HDRMetadata>& hdr_metadata);
} // namespace metal
#endif // COMPONENTS_METAL_UTIL_HDR_COPIER_LAYER_H_
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