1 files changed, 116 insertions, 0 deletions
diff --git a/Source/WebKit2/Shared/gtk/UpdateChunk.cpp b/Source/WebKit2/Shared/gtk/UpdateChunk.cpp
new file mode 100644
index 0000000..fb3573c
--- /dev/null
+++ b/Source/WebKit2/Shared/gtk/UpdateChunk.cpp
@@ -0,0 +1,116 @@
+/*
+ * 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 "UpdateChunk.h"
+
+#include "WebCoreArgumentCoders.h"
+#include <gdk/gdkx.h>
+
+using namespace WebCore;
+
+static cairo_format_t imageFormat = CAIRO_FORMAT_ARGB32;
+
+namespace WebKit {
+
+UpdateChunk::UpdateChunk()
+    : m_sharedMemory(0)
+{
+}
+
+UpdateChunk::UpdateChunk(const IntRect& rect)
+    : m_rect(rect)
+    , m_sharedMemory(SharedMemory::create(size()))
+{
+}
+
+UpdateChunk::~UpdateChunk()
+{
+}
+
+size_t UpdateChunk::size() const
+{
+    return cairo_format_stride_for_width(imageFormat, m_rect.width()) * m_rect.height();
+}
+
+void UpdateChunk::encode(CoreIPC::ArgumentEncoder* encoder) const
+{
+    encoder->encode(m_rect);
+    if (!m_sharedMemory) {
+        encoder->encode(false);
+        return;
+    }
+
+    SharedMemory::Handle handle;
+    if (m_sharedMemory->createHandle(handle, SharedMemory::ReadOnly)) {
+        encoder->encode(true);
+        encoder->encode(handle);
+    } else
+        encoder->encode(false);
+
+    m_sharedMemory = 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;
+
+    bool hasSharedMemory;
+    if (!decoder->decode(hasSharedMemory))
+        return false;
+
+    if (!hasSharedMemory) {
+        chunk.m_sharedMemory = 0;
+        return true;
+    }
+
+    SharedMemory::Handle handle;
+    if (!decoder->decode(handle))
+        return false;
+
+    chunk.m_sharedMemory = SharedMemory::create(handle, SharedMemory::ReadOnly);
+    return true;
+}
+
+cairo_surface_t* UpdateChunk::createImage() const
+{
+    ASSERT(m_sharedMemory);
+    if (!m_sharedMemory)
+        return 0;
+
+    int stride = cairo_format_stride_for_width(imageFormat, m_rect.width());
+    return cairo_image_surface_create_for_data(static_cast<unsigned char*>(m_sharedMemory->data()),
+                                               imageFormat, m_rect.width(), m_rect.height(), stride);
+}
+
+} // namespace WebKit