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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 "NativeImage.h"
#include "TextFlags.h"
#include "TextIndicator.h"
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_BEGIN
#include <skia/core/SkBitmap.h>
#include <skia/core/SkCanvas.h>
#include <skia/core/SkImageInfo.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_END
#include <wtf/URL.h>
namespace WebCore {
IntSize dragImageSize(DragImageRef image)
{
if (image)
return { image->width(), image->height() };
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;
auto imageInfo = SkImageInfo::Make(scaledSize.width(), scaledSize.height(), image->imageInfo().colorType(), image->imageInfo().alphaType());
SkBitmap bitmap;
bitmap.allocPixels(imageInfo);
SkPixmap pixmap;
if (!bitmap.peekPixels(&pixmap))
return nullptr;
if (!image->scalePixels(pixmap, SkSamplingOptions(SkCubicResampler::CatmullRom())))
return nullptr;
return SkImages::RasterFromBitmap(bitmap);
}
DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction)
{
if (!image)
return nullptr;
SkBitmap bitmap;
bitmap.allocPixels(image->imageInfo());
SkPixmap pixmap;
if (!bitmap.peekPixels(&pixmap))
return nullptr;
auto canvas = SkCanvas::MakeRasterDirect(bitmap.info(), pixmap.writable_addr(), bitmap.rowBytes());
SkPaint paint;
paint.setAlphaf(fraction);
canvas->drawImage(image, 0, 0, { }, &paint);
return SkImages::RasterFromBitmap(bitmap);
}
DragImageRef createDragImageFromImage(Image* image, ImageOrientation, GraphicsClient*, float)
{
return image->currentNativeImage()->platformImage();
}
DragImageRef createDragImageIconForCachedImageFilename(const String&)
{
return nullptr;
}
DragImageData createDragImageForLink(Element&, URL&, const String&, float)
{
return { nullptr, nullptr };
}
DragImageRef createDragImageForColor(const Color&, const FloatRect&, float, Path&)
{
return nullptr;
}
}
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