1 files changed, 118 insertions, 0 deletions
diff --git a/Source/WebKit2/Shared/qt/UpdateChunk.cpp b/Source/WebKit2/Shared/qt/UpdateChunk.cpp
new file mode 100644
index 0000000..4d8e62d
--- /dev/null
+++ b/Source/WebKit2/Shared/qt/UpdateChunk.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2010 University of Szeged
+ *
+ * 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 "UpdateChunk.h"
+
+#include "ArgumentDecoder.h"
+#include "ArgumentEncoder.h"
+#include "MappedMemoryPool.h"
+#include "WebCoreArgumentCoders.h"
+#include <QIODevice>
+#include <QImage>
+#include <QPixmap>
+#include <WebCore/FloatRect.h>
+#include <wtf/text/WTFString.h>
+
+using namespace WebCore;
+using namespace std;
+
+namespace WebKit {
+
+UpdateChunk::UpdateChunk()
+    : m_mappedMemory(0)
+{
+}
+
+UpdateChunk::UpdateChunk(const IntRect& rect)
+    : m_rect(rect)
+    , m_mappedMemory(MappedMemoryPool::instance()->mapMemory(size()))
+{
+}
+
+UpdateChunk::~UpdateChunk()
+{
+    if (m_mappedMemory)
+        m_mappedMemory->markFree();
+}
+
+void UpdateChunk::encode(CoreIPC::ArgumentEncoder* encoder) const
+{
+    encoder->encode(m_rect);
+    encoder->encode(String(m_mappedMemory->mappedFileName()));
+
+    m_mappedMemory = 0;
+}
+
+bool UpdateChunk::decode(CoreIPC::ArgumentDecoder* decoder, UpdateChunk& chunk)
+{
+    ASSERT_ARG(chunk, chunk.isEmpty());
+
+    IntRect rect;
+    if (!decoder->decode(rect))
+        return false;
+    chunk.m_rect = rect;
+
+    if (chunk.isEmpty())
+        return true; // Successfully decoded empty chunk.
+
+    String fileName;
+    if (!decoder->decode(fileName))
+        return false;
+
+    chunk.m_mappedMemory = MappedMemoryPool::instance()->mapFile(fileName, chunk.size());
+    return true;
+}
+
+size_t UpdateChunk::size() const
+{
+    int bpp;
+    if (QPixmap::defaultDepth() == 16)
+        bpp = 2;
+    else
+        bpp = 4;
+
+    return ((m_rect.width() * bpp + 3) & ~0x3)
+           * m_rect.height();
+}
+
+QImage UpdateChunk::createImage() const
+{
+    ASSERT(m_mappedMemory);
+    QImage::Format format;
+    int bpp;
+    if (QPixmap::defaultDepth() == 16) {
+        format = QImage::Format_RGB16;
+        bpp = 2;
+    } else {
+        format = QImage::Format_RGB32;
+        bpp = 4;
+    }
+
+    return QImage(m_mappedMemory->data(), m_rect.width(), m_rect.height(), (m_rect.width() * bpp + 3) & ~0x3, format);
+}
+
+} // namespace WebKit