108 lines
4.2 KiB
C++
108 lines
4.2 KiB
C++
/*
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* Copyright (C) 2011 Apple Inc. All rights reserved.
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* Copyright (C) 2011,2014 Igalia S.L.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "BackingStore.h"
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#include "ShareableBitmap.h"
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#include "UpdateInfo.h"
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#include "WebPageProxy.h"
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#include <WebCore/BackingStoreBackendCairoImpl.h>
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#include <WebCore/CairoUtilities.h>
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#include <WebCore/GraphicsContextCairo.h>
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#include <WebCore/RefPtrCairo.h>
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#include <cairo.h>
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#if PLATFORM(GTK) && PLATFORM(X11) && defined(GDK_WINDOWING_X11) && !USE(GTK4)
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#include <WebCore/BackingStoreBackendCairoX11.h>
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#include <WebCore/PlatformDisplayX11.h>
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#include <gdk/gdkx.h>
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#endif
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namespace WebKit {
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using namespace WebCore;
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std::unique_ptr<BackingStoreBackendCairo> BackingStore::createBackend()
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{
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#if PLATFORM(GTK) && PLATFORM(X11) && defined(GDK_WINDOWING_X11) && !USE(GTK4)
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const auto& sharedDisplay = PlatformDisplay::sharedDisplay();
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if (is<PlatformDisplayX11>(sharedDisplay)) {
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GdkVisual* visual = gtk_widget_get_visual(m_webPageProxy.viewWidget());
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GdkScreen* screen = gdk_visual_get_screen(visual);
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ASSERT(downcast<PlatformDisplayX11>(sharedDisplay).native() == GDK_SCREEN_XDISPLAY(screen));
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return makeUnique<BackingStoreBackendCairoX11>(GDK_WINDOW_XID(gdk_screen_get_root_window(screen)),
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GDK_VISUAL_XVISUAL(visual), gdk_visual_get_depth(visual), m_size, m_deviceScaleFactor);
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}
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#endif
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return makeUnique<BackingStoreBackendCairoImpl>(m_size, m_deviceScaleFactor);
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}
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void BackingStore::paint(cairo_t* context, const IntRect& rect)
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{
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ASSERT(m_backend);
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cairo_save(context);
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cairo_set_operator(context, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_surface(context, m_backend->surface(), 0, 0);
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cairo_rectangle(context, rect.x(), rect.y(), rect.width(), rect.height());
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cairo_fill(context);
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cairo_restore(context);
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}
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void BackingStore::incorporateUpdate(ShareableBitmap* bitmap, const UpdateInfo& updateInfo)
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{
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if (!m_backend)
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m_backend = createBackend();
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scroll(updateInfo.scrollRect, updateInfo.scrollOffset);
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// Paint all update rects.
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IntPoint updateRectLocation = updateInfo.updateRectBounds.location();
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GraphicsContextCairo graphicsContext(m_backend->surface());
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// When m_webPageProxy.drawsBackground() is false, bitmap contains transparent parts as a background of the webpage.
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// For such case, bitmap must be drawn using CompositeOperator::Copy to overwrite the existing surface.
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graphicsContext.setCompositeOperation(WebCore::CompositeOperator::Copy);
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for (const auto& updateRect : updateInfo.updateRects) {
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IntRect srcRect = updateRect;
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srcRect.move(-updateRectLocation.x(), -updateRectLocation.y());
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bitmap->paint(graphicsContext, deviceScaleFactor(), updateRect.location(), srcRect);
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}
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}
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void BackingStore::scroll(const IntRect& scrollRect, const IntSize& scrollOffset)
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{
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if (scrollOffset.isZero())
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return;
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ASSERT(m_backend);
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m_backend->scroll(scrollRect, scrollOffset);
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}
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} // namespace WebKit
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