/* * Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef GraphicsContextCG_h #define GraphicsContextCG_h #include "GraphicsContext.h" typedef struct CGColorSpace *CGColorSpaceRef; namespace WebCore { CGColorSpaceRef deviceRGBColorSpaceRef(); WEBCORE_EXPORT CGColorSpaceRef sRGBColorSpaceRef(); CGColorSpaceRef linearRGBColorSpaceRef(); static inline CGColorSpaceRef cachedCGColorSpace(ColorSpace colorSpace) { switch (colorSpace) { case ColorSpaceDeviceRGB: return deviceRGBColorSpaceRef(); case ColorSpaceSRGB: return sRGBColorSpaceRef(); case ColorSpaceLinearRGB: return linearRGBColorSpaceRef(); } ASSERT_NOT_REACHED(); return deviceRGBColorSpaceRef(); } class CGContextStateSaver { public: CGContextStateSaver(CGContextRef context, bool saveAndRestore = true) : m_context(context) , m_saveAndRestore(saveAndRestore) { if (m_saveAndRestore) CGContextSaveGState(m_context); } ~CGContextStateSaver() { if (m_saveAndRestore) CGContextRestoreGState(m_context); } void save() { ASSERT(!m_saveAndRestore); CGContextSaveGState(m_context); m_saveAndRestore = true; } void restore() { ASSERT(m_saveAndRestore); CGContextRestoreGState(m_context); m_saveAndRestore = false; } private: CGContextRef m_context; bool m_saveAndRestore; }; } #endif