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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_CANVAS_RESOURCE_PARAMS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_CANVAS_RESOURCE_PARAMS_H_
#include "components/viz/common/resources/resource_format.h"
#include "third_party/blink/renderer/platform/graphics/canvas_color_params.h"
#include "third_party/blink/renderer/platform/graphics/graphics_types.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/skia/include/core/SkColorSpace.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "ui/gfx/buffer_types.h"
class SkSurfaceProps;
namespace gfx {
class ColorSpace;
}
namespace blink {
// TODO(https://crbug.com/1157747): This class is a copy-paste of
// CanvasColorParams. This should be changed to specify a SkColorType,
// SkAlphaType, SkColorSpace, and SkFilterMode.
class PLATFORM_EXPORT CanvasResourceParams {
DISALLOW_NEW();
public:
// The default constructor will create an output-blended 8-bit surface.
CanvasResourceParams();
CanvasResourceParams(CanvasColorSpace, SkColorType, SkAlphaType);
explicit CanvasResourceParams(const SkImageInfo&);
CanvasColorSpace ColorSpace() const { return color_space_; }
void SetCanvasColorSpace(CanvasColorSpace c) { color_space_ = c; }
void SetSkColorType(SkColorType color_type) { color_type_ = color_type; }
// The pixel format to use for allocating SkSurfaces.
SkColorType GetSkColorType() const { return color_type_; }
uint8_t BytesPerPixel() const;
// The color space in which pixels read from the canvas via a shader will be
// returned. Note that for canvases with linear pixel math, these will be
// converted from their storage space into a linear space.
gfx::ColorSpace GetSamplerGfxColorSpace() const;
// Return the color space of the underlying data for the canvas.
gfx::ColorSpace GetStorageGfxColorSpace() const;
sk_sp<SkColorSpace> GetSkColorSpace() const;
SkAlphaType GetSkAlphaType() const { return alpha_type_; }
SkSurfaceProps GetSkSurfaceProps() const;
bool CanUseLcdText() const {
// LCD text is safe when canvas is guaranteed not to be semi-transparent.
return alpha_type_ == kOpaque_SkAlphaType;
}
// Gpu memory buffer parameters
gfx::BufferFormat GetBufferFormat() const;
uint32_t GLSizedInternalFormat() const; // For GLES2, use Unsized
uint32_t GLUnsizedInternalFormat() const;
uint32_t GLType() const;
viz::ResourceFormat TransferableResourceFormat() const;
private:
CanvasResourceParams(const sk_sp<SkColorSpace> color_space,
SkColorType color_type);
CanvasColorSpace color_space_ = CanvasColorSpace::kSRGB;
SkColorType color_type_ = kN32_SkColorType;
SkAlphaType alpha_type_ = kPremul_SkAlphaType;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_CANVAS_RESOURCE_PARAMS_H_
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