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/*
* 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 "DragImage.h"
#include "Image.h"
#include "RefPtrCairo.h"
#include <cairo.h>
#include <gdk/gdk.h>
namespace WebCore {
IntSize dragImageSize(DragImageRef image)
{
if (image)
return IntSize(cairo_image_surface_get_width(image), cairo_image_surface_get_height(image));
return IntSize(0, 0);
}
void deleteDragImage(DragImageRef image)
{
if (image)
cairo_surface_destroy(image);
}
DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)
{
if (!image)
return 0;
int newWidth = scale.width() * cairo_image_surface_get_width(image);
int newHeight = scale.height() * cairo_image_surface_get_height(image);
cairo_surface_t* scaledSurface = cairo_surface_create_similar(image, CAIRO_CONTENT_COLOR_ALPHA, newWidth, newHeight);
RefPtr<cairo_t> context = adoptRef(cairo_create(scaledSurface));
cairo_scale(context.get(), scale.width(), scale.height());
cairo_pattern_set_extend(cairo_get_source(context.get()), CAIRO_EXTEND_PAD);
cairo_pattern_set_filter(cairo_get_source(context.get()), CAIRO_FILTER_BEST);
cairo_set_operator(context.get(), CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(context.get(), image, 0, 0);
cairo_paint(context.get());
deleteDragImage(image);
return scaledSurface;
}
DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction)
{
if (!image)
return 0;
if (!gdk_screen_is_composited(gdk_screen_get_default()))
return image;
RefPtr<cairo_t> context = adoptRef(cairo_create(image));
cairo_set_operator(context.get(), CAIRO_OPERATOR_DEST_IN);
cairo_set_source_rgba(context.get(), 0, 0, 0, fraction);
cairo_paint(context.get());
return image;
}
DragImageRef createDragImageFromImage(Image* image, RespectImageOrientationEnum)
{
return image->nativeImageForCurrentFrame().leakRef();
}
DragImageRef createDragImageIconForCachedImageFilename(const String&)
{
return 0;
}
}
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