1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 * Portions Copyright (c) 2010 Motorola Mobility, Inc.  All rights reserved.
4 * Copyright (C) 2011 Igalia S.L
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
25 * THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "config.h"
29#include "ChunkedUpdateDrawingAreaProxy.h"
30
31#include "RefPtrCairo.h"
32#include "UpdateChunk.h"
33#include "WebProcessProxy.h"
34#include "WebView.h"
35#include <WebCore/GtkVersioning.h>
36#include <gdk/gdk.h>
37
38using namespace WebCore;
39
40namespace WebKit {
41
42WebPageProxy* ChunkedUpdateDrawingAreaProxy::page()
43{
44    return m_webView->page();
45}
46
47void ChunkedUpdateDrawingAreaProxy::ensureBackingStore()
48{
49    if (m_backingStoreImage)
50        return;
51
52    m_backingStoreImage = gdk_window_create_similar_surface(gtk_widget_get_window(m_webView->window()),
53                                                            CAIRO_CONTENT_COLOR_ALPHA, size().width(), size().height());
54}
55
56void ChunkedUpdateDrawingAreaProxy::invalidateBackingStore()
57{
58    if (m_backingStoreImage) {
59        cairo_surface_destroy(m_backingStoreImage);
60        m_backingStoreImage = 0;
61    }
62}
63
64bool ChunkedUpdateDrawingAreaProxy::platformPaint(const IntRect& rect, cairo_t* cr)
65{
66    if (!m_backingStoreImage)
67        return false;
68
69    cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height());
70    cairo_set_source_surface(cr, m_backingStoreImage, 0, 0);
71    cairo_fill(cr);
72
73    return true;
74}
75
76void ChunkedUpdateDrawingAreaProxy::drawUpdateChunkIntoBackingStore(UpdateChunk* updateChunk)
77{
78    ensureBackingStore();
79
80    RefPtr<cairo_surface_t> pixmap(updateChunk->createImage());
81    if (cairo_surface_status(pixmap.get()) != CAIRO_STATUS_SUCCESS)
82        return;
83
84    const IntRect& updateChunkRect = updateChunk->rect();
85
86    RefPtr<cairo_t> cr = cairo_create(m_backingStoreImage);
87    cairo_set_source_surface(cr.get(), pixmap.get(), updateChunkRect.x(), updateChunkRect.y());
88    cairo_paint(cr.get());
89
90    gtk_widget_queue_draw_area(m_webView->window(), updateChunkRect.x(), updateChunkRect.y(),
91                               updateChunkRect.width(), updateChunkRect.height());
92}
93
94} // namespace WebKit
95