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/*
* 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/WTFString.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 * 100.0);
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 "data:" + mimeType + ";base64," + out;
}
}
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