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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_IMAGE_IMAGE_SKIA_REP_DEFAULT_H_
#define UI_GFX_IMAGE_IMAGE_SKIA_REP_DEFAULT_H_
#include "base/component_export.h"
#include "build/build_config.h"
#include "cc/paint/paint_image.h"
#include "cc/paint/paint_op_buffer.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/geometry/size.h"
namespace gfx {
// An ImageSkiaRep represents an image and the scale factor it is intended for.
// 0.0f scale is used to indicate that this ImageSkiaRep is used for unscaled
// (ImageSkia does not automatically scale the image).
// TODO(malaykeshav): Support transport of PaintRecord across mojo. This would
// require adding inline serialization support for PaintRecords.
class COMPONENT_EXPORT(GFX) ImageSkiaRep {
public:
// Create null bitmap.
ImageSkiaRep();
// Note: This is for testing purpose only.
// Creates a bitmap with kARGB_8888_Config config with given |size| in DIP.
// This allocates pixels in the bitmap. It is guaranteed that the data in the
// bitmap are initialized but the actual values are undefined.
// Specifying 0 scale means the image is for unscaled image (unscaled()
// returns true, and scale() returns 1.0f).
ImageSkiaRep(const gfx::Size& size, float scale);
// Creates an ImageSkiaRep that holds the `src` bitmap, which is created for
// display at the given device scale factor. Takes ownership of a reference to
// the SkBitmap's backing store. The `src` bitmap may not be uninitialized,
// null or empty; in that case the default constructor should be used
// instead.
ImageSkiaRep(const SkBitmap& src, float scale);
// Creates an image rep backed by a paint record of given size and scale. This
// is used when the image representation is sourced from a drawable such as
// CanvasImageSource. The `size` must not be empty; in that case the default
// constructor should be used instead.
ImageSkiaRep(cc::PaintRecord paint_record,
const gfx::Size& size,
float scale);
ImageSkiaRep(const ImageSkiaRep& other);
~ImageSkiaRep();
// Get width and height of the image in pixels.
int pixel_width() const { return pixel_size_.width(); }
int pixel_height() const { return pixel_size_.height(); }
const Size& pixel_size() const { return pixel_size_; }
// Get width and height of the image in DIP.
int GetWidth() const;
int GetHeight() const;
// Retrieves the scale for which this image is a representation of.
float scale() const { return unscaled() ? 1.0f : scale_; }
bool unscaled() const { return scale_ == 0.0f; }
bool is_null() const {
return type_ == ImageRepType::kImageTypeBitmap ? bitmap_.isNull()
: !paint_record_;
}
// Returns the backing bitmap when the image representation is sourced from a
// bitmap. If this is a |kImageTypeDrawable| then it will generate(and cache)
// a bitmap.
const SkBitmap& GetBitmap() const;
// Returns the backing drawable as a PaintRecord. Use this when the type of
// ImageRep is |kImageTypeDrawable|.
cc::PaintRecord GetPaintRecord() const;
const cc::PaintImage& paint_image() const { return paint_image_; }
bool has_paint_image() const { return !!paint_image_; }
private:
enum class ImageRepType {
kImageTypeBitmap, // When the source image is rasterized. (Bitmaps, PNGs)
kImageTypeDrawable // When the source image is a drawable generated by a
// CanvasImageSource.
};
// TODO(malaykeshav): Remove when migration is complete and it is safe.
cc::PaintImage paint_image_;
mutable std::optional<cc::PaintRecord> paint_record_;
ImageRepType type_;
Size pixel_size_;
mutable SkBitmap bitmap_;
float scale_;
};
} // namespace gfx
#endif // UI_GFX_IMAGE_IMAGE_SKIA_REP_DEFAULT_H_
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