/* * Copyright (C) 2011 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. AND ITS CONTRIBUTORS ``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 ITS 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. */ #include "config.h" #include "BackingStore.h" #include "ShareableBitmap.h" #include "UpdateInfo.h" #include <WebCore/BitmapInfo.h> #include <WebCore/GraphicsContext.h> #include <WebCore/IntRect.h> using namespace WebCore; namespace WebKit { class BitmapDC { WTF_MAKE_NONCOPYABLE(BitmapDC); public: BitmapDC(HBITMAP, HDC destinationDC); ~BitmapDC(); operator HDC() const { return m_dc.get(); } private: OwnPtr<HDC> m_dc; HBITMAP m_originalBitmap; }; BitmapDC::BitmapDC(HBITMAP bitmap, HDC destinationDC) : m_dc(adoptPtr(::CreateCompatibleDC(destinationDC))) , m_originalBitmap(static_cast<HBITMAP>(::SelectObject(m_dc.get(), bitmap))) { } BitmapDC::~BitmapDC() { ::SelectObject(m_dc.get(), m_originalBitmap); } void BackingStore::paint(HDC dc, const IntRect& rect) { ASSERT(m_bitmap); ::BitBlt(dc, rect.x(), rect.y(), rect.width(), rect.height(), BitmapDC(m_bitmap.get(), dc), rect.x(), rect.y(), SRCCOPY); } static PassOwnPtr<HBITMAP> createBitmap(const IntSize& size) { // FIXME: Maybe it would be better for performance to create a device-dependent bitmap here? BitmapInfo info = BitmapInfo::createBottomUp(size); void* bits; return adoptPtr(::CreateDIBSection(0, &info, DIB_RGB_COLORS, &bits, 0, 0)); } void BackingStore::incorporateUpdate(ShareableBitmap* bitmap, const UpdateInfo& updateInfo) { if (!m_bitmap) m_bitmap = createBitmap(m_size); scroll(updateInfo.scrollRect, updateInfo.scrollOffset); IntPoint updateRectLocation = updateInfo.updateRectBounds.location(); BitmapDC dc(m_bitmap.get(), 0); GraphicsContext graphicsContext(dc); // Paint all update rects. for (size_t i = 0; i < updateInfo.updateRects.size(); ++i) { IntRect updateRect = updateInfo.updateRects[i]; IntRect srcRect = updateRect; srcRect.move(-updateRectLocation.x(), -updateRectLocation.y()); bitmap->paint(graphicsContext, updateRect.location(), srcRect); } } void BackingStore::scroll(const IntRect& scrollRect, const IntSize& scrollOffset) { if (scrollOffset.isZero()) return; RECT winScrollRect = scrollRect; ::ScrollDC(BitmapDC(m_bitmap.get(), 0), scrollOffset.width(), scrollOffset.height(), &winScrollRect, &winScrollRect, 0, 0); } } // namespace WebKit