Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 73 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/gtk/ImageBufferGtk.cpp b/Source/WebCore/platform/graphics/gtk/ImageBufferGtk.cpp
new file mode 100644
index 0000000..2aa016e
--- /dev/null
+++ b/Source/WebCore/platform/graphics/gtk/ImageBufferGtk.cpp
@@ -0,0 +1,73 @@
+/*
+ *  Copyright (C) 2010 Igalia S.L.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+
+#include "config.h"
+#include "ImageBuffer.h"
+
+#include "Base64.h"
+#include "GdkCairoUtilities.h"
+#include "GOwnPtr.h"
+#include "GRefPtrGtk.h"
+#include "MIMETypeRegistry.h"
+#include <cairo.h>
+#include <gtk/gtk.h>
+#include <wtf/text/CString.h>
+#include <wtf/text/StringConcatenate.h>
+
+namespace WebCore {
+
+String ImageBuffer::toDataURL(const String& mimeType, const double* quality) const
+{
+    ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
+
+    if (!mimeType.startsWith("image/"))
+        return "data:,";
+
+    // List of supported image types comes from the GdkPixbuf documentation.
+    // http://library.gnome.org/devel/gdk-pixbuf/stable/gdk-pixbuf-file-saving.html#gdk-pixbuf-save-to-bufferv
+    String type = mimeType.substring(sizeof "image");
+    if (type != "jpeg" && type != "png" && type != "tiff" && type != "ico" && type != "bmp")
+        return "data:,";
+
+    GRefPtr<GdkPixbuf> pixbuf = cairoImageSurfaceToGdkPixbuf(m_data.m_surface);
+    if (!pixbuf)
+        return "data:,";
+
+    GOwnPtr<gchar> buffer(0);
+    gsize bufferSize;
+    GError* error = 0;
+    gboolean success = FALSE;
+    if (type == "jpeg" && quality && *quality >= 0.0 && *quality <= 1.0) {
+        String qualityString = String::format("%f", *quality);
+        success = gdk_pixbuf_save_to_buffer(pixbuf.get(), &buffer.outPtr(), &bufferSize,
+            type.utf8().data(), &error, "quality", qualityString.utf8().data(), NULL);
+    } else {
+        success = gdk_pixbuf_save_to_buffer(pixbuf.get(), &buffer.outPtr(), &bufferSize, type.utf8().data(), &error, NULL);
+    }
+
+    if (!success)
+        return "data:,";
+
+    Vector<char> out;
+    base64Encode(reinterpret_cast<const char*>(buffer.get()), bufferSize, out);
+
+    return makeString("data:", mimeType, ";base64,", out);
+}
+
+}