1 files changed, 94 insertions, 0 deletions
diff --git a/Source/WebKit2/UIProcess/gtk/ChunkedUpdateDrawingAreaProxyGtk.cpp b/Source/WebKit2/UIProcess/gtk/ChunkedUpdateDrawingAreaProxyGtk.cpp
new file mode 100644
index 0000000..a5c708f
--- /dev/null
+++ b/Source/WebKit2/UIProcess/gtk/ChunkedUpdateDrawingAreaProxyGtk.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Portions Copyright (c) 2010 Motorola Mobility, Inc.  All rights reserved.
+ * Copyright (C) 2011 Igalia S.L
+ *
+ * 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 "ChunkedUpdateDrawingAreaProxy.h"
+
+#include "RefPtrCairo.h"
+#include "UpdateChunk.h"
+#include "WebProcessProxy.h"
+#include "WebView.h"
+
+#include <gdk/gdk.h>
+
+using namespace WebCore;
+
+namespace WebKit {
+
+WebPageProxy* ChunkedUpdateDrawingAreaProxy::page()
+{
+    return m_webView->page();
+}
+
+void ChunkedUpdateDrawingAreaProxy::ensureBackingStore()
+{
+    if (m_backingStoreImage)
+        return;
+
+    m_backingStoreImage = gdk_window_create_similar_surface(gtk_widget_get_window(m_webView->window()),
+                                                            CAIRO_CONTENT_COLOR_ALPHA, size().width(), size().height());
+}
+
+void ChunkedUpdateDrawingAreaProxy::invalidateBackingStore()
+{
+    if (m_backingStoreImage) {
+        cairo_surface_destroy(m_backingStoreImage);
+        m_backingStoreImage = 0;
+    }
+}
+
+bool ChunkedUpdateDrawingAreaProxy::platformPaint(const IntRect& rect, cairo_t* cr)
+{
+    if (!m_backingStoreImage)
+        return false;
+
+    cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height());
+    cairo_set_source_surface(cr, m_backingStoreImage, 0, 0);
+    cairo_fill(cr);
+
+    return true;
+}
+
+void ChunkedUpdateDrawingAreaProxy::drawUpdateChunkIntoBackingStore(UpdateChunk* updateChunk)
+{
+    ensureBackingStore();
+
+    RefPtr<cairo_surface_t> pixmap(updateChunk->createImage());
+    if (cairo_surface_status(pixmap.get()) != CAIRO_STATUS_SUCCESS)
+        return;
+
+    const IntRect& updateChunkRect = updateChunk->rect();
+
+    RefPtr<cairo_t> cr = cairo_create(m_backingStoreImage);
+    cairo_set_source_surface(cr.get(), pixmap.get(), updateChunkRect.x(), updateChunkRect.y());
+    cairo_paint(cr.get());
+
+    gtk_widget_queue_draw_area(m_webView->window(), updateChunkRect.x(), updateChunkRect.y(),
+                               updateChunkRect.width(), updateChunkRect.height());
+}
+
+} // namespace WebKit