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/*
* Copyright (C) 2010,2017 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 "Element.h"
#include "Image.h"
#include "TextFlags.h"
#include "TextIndicator.h"
#include <cairo.h>
#include <gdk/gdk.h>
#include <wtf/URL.h>
namespace WebCore {
IntSize dragImageSize(DragImageRef image)
{
if (image)
return { cairo_image_surface_get_width(image.get()), cairo_image_surface_get_height(image.get()) };
return { 0, 0 };
}
void deleteDragImage(DragImageRef)
{
// Since this is a RefPtr, there's nothing additional we need to do to
// delete it. It will be released when it falls out of scope.
}
DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)
{
if (!image)
return nullptr;
IntSize imageSize = dragImageSize(image);
IntSize scaledSize(imageSize);
scaledSize.scale(scale.width(), scale.height());
if (imageSize == scaledSize)
return image;
RefPtr<cairo_surface_t> scaledSurface = adoptRef(cairo_surface_create_similar(image.get(), CAIRO_CONTENT_COLOR_ALPHA, scaledSize.width(), scaledSize.height()));
RefPtr<cairo_t> context = adoptRef(cairo_create(scaledSurface.get()));
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.get(), 0, 0);
cairo_paint(context.get());
return scaledSurface;
}
DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction)
{
if (!image)
return nullptr;
#if !USE(GTK4)
if (!gdk_screen_is_composited(gdk_screen_get_default()))
return image;
#endif
RefPtr<cairo_t> context = adoptRef(cairo_create(image.get()));
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, ImageOrientation)
{
return image->nativeImageForCurrentFrame()->platformImage();
}
DragImageRef createDragImageIconForCachedImageFilename(const String&)
{
return nullptr;
}
DragImageRef createDragImageForLink(Element&, URL&, const String&, TextIndicatorData&, float)
{
return nullptr;
}
DragImageRef createDragImageForColor(const Color&, const FloatRect&, float, Path&)
{
return nullptr;
}
}
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