third_party/blink/renderer/platform/mac/local_current_graphics_context.h

/*
 * Copyright (C) 2006 Apple Computer, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_MAC_LOCAL_CURRENT_GRAPHICS_CONTEXT_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MAC_LOCAL_CURRENT_GRAPHICS_CONTEXT_H_

#include "base/macros.h"
#include "third_party/blink/renderer/platform/geometry/int_rect.h"
#include "third_party/blink/renderer/platform/mac/graphics_context_canvas.h"
#include "third_party/blink/renderer/platform/platform_export.h"

OBJC_CLASS NSGraphicsContext;

namespace cc {
class PaintCanvas;
}

namespace blink {
class GraphicsContext;

// This class automatically saves and restores the current NSGraphicsContext for
// functions which call out into AppKit and rely on the currentContext being set
class PLATFORM_EXPORT LocalCurrentGraphicsContext {
 public:
  LocalCurrentGraphicsContext(GraphicsContext&, const IntRect& dirty_rect);
  LocalCurrentGraphicsContext(cc::PaintCanvas*,
                              float device_scale_factor,
                              const IntRect& dirty_rect);
  ~LocalCurrentGraphicsContext();
  CGContextRef CgContext();

 private:
  cc::PaintCanvas* saved_canvas_;
  NSGraphicsContext* saved_ns_graphics_context_;
  bool did_set_graphics_context_;
  IntRect inflated_dirty_rect_;
  GraphicsContextCanvas graphics_context_canvas_;

  DISALLOW_COPY_AND_ASSIGN(LocalCurrentGraphicsContext);
};
}

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MAC_LOCAL_CURRENT_GRAPHICS_CONTEXT_H_