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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 PDF_PPAPI_MIGRATION_GRAPHICS_H_
#define PDF_PPAPI_MIGRATION_GRAPHICS_H_
#include "pdf/ppapi_migration/callback.h"
#include "ppapi/cpp/graphics_2d.h"
#include "ui/gfx/geometry/size.h"
namespace gfx {
class Point;
class Rect;
class Vector2d;
} // namespace gfx
namespace pp {
class InstanceHandle;
} // namespace pp
namespace chrome_pdf {
class Image;
// Abstraction for a Pepper or Skia graphics device.
// TODO(crbug.com/1099020): Implement the Skia graphics device.
class Graphics {
public:
virtual ~Graphics() = default;
const gfx::Size& size() const { return size_; }
// Flushes pending operations, invoking the callback on completion. Returns
// `true` if the callback is still pending.
virtual bool Flush(ResultCallback callback) = 0;
// Paints the |src_rect| region of |image| to the graphics device. The image
// must be compatible with the concrete `Graphics` implementation.
virtual void PaintImage(const Image& image, const gfx::Rect& src_rect) = 0;
// Shifts the |clip| region of the graphics device by |amount|.
virtual void Scroll(const gfx::Rect& clip, const gfx::Vector2d& amount) = 0;
// Sets the output scale factor. Must be greater than 0.
virtual void SetScale(float scale) = 0;
// Sets the output layer transform.
virtual void SetLayerTransform(float scale,
const gfx::Point& origin,
const gfx::Vector2d& translate) = 0;
protected:
explicit Graphics(const gfx::Size& size);
private:
gfx::Size size_;
};
// A Pepper graphics device.
class PepperGraphics final : public Graphics {
public:
PepperGraphics(const pp::InstanceHandle& instance, const gfx::Size& size);
~PepperGraphics() override;
bool Flush(ResultCallback callback) override;
void PaintImage(const Image& image, const gfx::Rect& src_rect) override;
void Scroll(const gfx::Rect& clip, const gfx::Vector2d& amount) override;
void SetScale(float scale) override;
void SetLayerTransform(float scale,
const gfx::Point& origin,
const gfx::Vector2d& translate) override;
// Gets the underlying pp::Graphics2D.
pp::Graphics2D& pepper_graphics() { return pepper_graphics_; }
private:
pp::Graphics2D pepper_graphics_;
};
} // namespace chrome_pdf
#endif // PDF_PPAPI_MIGRATION_GRAPHICS_H_
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