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// Copyright 2017 The Chromium Authors
// 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_MAC_GRAPHICS_CONTEXT_CANVAS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MAC_GRAPHICS_CONTEXT_CANVAS_H_
#include <ApplicationServices/ApplicationServices.h>
#include "base/apple/scoped_cftyperef.h"
#include "base/memory/raw_ptr.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/skia/include/core/SkBitmap.h"
struct SkIRect;
namespace cc {
class PaintCanvas;
}
namespace blink {
// Creates a bridge for painting into a PaintCanvas with a CGContext.
class PLATFORM_EXPORT GraphicsContextCanvas {
public:
// Internally creates a bitmap the same size |paint_rect|, scaled by
// |bitmap_scale_factor|. Painting into the CgContext will go into the
// bitmap. Upon destruction, that bitmap will be painted into the
// canvas as the rectangle |paint_rect|. Users are expected to
// clip |paint_rect| to reasonable sizes to not create giant bitmaps.
// The |paint_rect| is in canvas device space. The CgContext is set
// up to be in exactly the same space as the canvas is at construction
// time.
GraphicsContextCanvas(cc::PaintCanvas*,
const SkIRect& paint_rect,
SkScalar bitmap_scale_factor = 1);
~GraphicsContextCanvas();
CGContextRef CgContext();
private:
void ReleaseIfNeeded();
raw_ptr<cc::PaintCanvas> canvas_;
base::apple::ScopedCFTypeRef<CGContextRef> cg_context_;
SkBitmap offscreen_;
SkScalar bitmap_scale_factor_;
SkIRect paint_rect_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MAC_GRAPHICS_CONTEXT_CANVAS_H_
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