// Copyright (C) 2013 Google Inc. All rights reserved.
//
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// modification, are permitted provided that the following conditions are
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//
// * Redistributions of source code must retain the above copyright
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// in the documentation and/or other materials provided with the
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#ifndef GraphicsContextStateSaver_h
#define GraphicsContextStateSaver_h
#include "platform/PlatformExport.h"
#include "platform/graphics/GraphicsContext.h"
namespace WebCore {
class PLATFORM_EXPORT GraphicsContextStateSaver {
WTF_MAKE_FAST_ALLOCATED;
public:
GraphicsContextStateSaver(GraphicsContext& context, bool saveAndRestore = true)
: m_context(context)
, m_saveAndRestore(saveAndRestore)
{
if (m_saveAndRestore)
m_context.save();
}
~GraphicsContextStateSaver()
{
if (m_saveAndRestore)
m_context.restore();
}
void save()
{
ASSERT(!m_saveAndRestore);
m_context.save();
m_saveAndRestore = true;
}
void restore()
{
ASSERT(m_saveAndRestore);
m_context.restore();
m_saveAndRestore = false;
}
GraphicsContext* context() const { return &m_context; }
bool saved() const { return m_saveAndRestore; }
private:
GraphicsContext& m_context;
bool m_saveAndRestore;
};
} // namespace WebCore
#endif // GraphicsContextStateSaver_h