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/*
* Copyright (C) 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "platform/DragImage.h"
#include "platform/fonts/Font.h"
#include "platform/fonts/FontCache.h"
#include "platform/fonts/FontDescription.h"
#include "platform/fonts/FontMetrics.h"
#include "platform/geometry/FloatPoint.h"
#include "platform/geometry/FloatRect.h"
#include "platform/geometry/IntPoint.h"
#include "platform/graphics/BitmapImage.h"
#include "platform/graphics/Color.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/Image.h"
#include "platform/graphics/ImageBuffer.h"
#include "platform/graphics/skia/NativeImageSkia.h"
#include "platform/text/BidiTextRun.h"
#include "platform/text/StringTruncator.h"
#include "platform/text/TextRun.h"
#include "platform/transforms/AffineTransform.h"
#include "platform/weborigin/KURL.h"
#include "skia/ext/image_operations.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/RefPtr.h"
#include "wtf/text/WTFString.h"
#include <algorithm>
namespace blink {
const float kDragLabelBorderX = 4;
// Keep border_y in synch with DragController::LinkDragBorderInset.
const float kDragLabelBorderY = 2;
const float kLabelBorderYOffset = 2;
const float kMaxDragLabelWidth = 300;
const float kMaxDragLabelStringWidth = (kMaxDragLabelWidth - 2 * kDragLabelBorderX);
const float kDragLinkLabelFontSize = 11;
const float kDragLinkUrlFontSize = 10;
PassOwnPtr<DragImage> DragImage::create(Image* image, RespectImageOrientationEnum shouldRespectImageOrientation, float deviceScaleFactor)
{
if (!image)
return nullptr;
RefPtr<NativeImageSkia> bitmap = image->nativeImageForCurrentFrame();
if (!bitmap)
return nullptr;
if (image->isBitmapImage()) {
ImageOrientation orientation = DefaultImageOrientation;
BitmapImage* bitmapImage = toBitmapImage(image);
IntSize sizeRespectingOrientation = bitmapImage->sizeRespectingOrientation();
if (shouldRespectImageOrientation == RespectImageOrientation)
orientation = bitmapImage->currentFrameOrientation();
if (orientation != DefaultImageOrientation) {
FloatRect destRect(FloatPoint(), sizeRespectingOrientation);
if (orientation.usesWidthAsHeight())
destRect = destRect.transposedRect();
SkBitmap skBitmap;
if (!skBitmap.allocN32Pixels(sizeRespectingOrientation.width(), sizeRespectingOrientation.height()))
return nullptr;
SkCanvas canvas(skBitmap);
canvas.concat(affineTransformToSkMatrix(orientation.transformFromDefault(sizeRespectingOrientation)));
canvas.drawBitmapRect(bitmap->bitmap(), 0, destRect);
return adoptPtr(new DragImage(skBitmap, deviceScaleFactor));
}
}
SkBitmap skBitmap;
if (!bitmap->bitmap().copyTo(&skBitmap, kN32_SkColorType))
return nullptr;
return adoptPtr(new DragImage(skBitmap, deviceScaleFactor));
}
static Font deriveDragLabelFont(int size, FontWeight fontWeight, const FontDescription& systemFont)
{
FontDescription description = systemFont;
description.setWeight(fontWeight);
description.setSpecifiedSize(size);
description.setComputedSize(size);
Font result(description);
result.update(nullptr);
return result;
}
PassOwnPtr<DragImage> DragImage::create(const KURL& url, const String& inLabel, const FontDescription& systemFont, float deviceScaleFactor)
{
const Font labelFont = deriveDragLabelFont(kDragLinkLabelFontSize, FontWeightBold, systemFont);
const Font urlFont = deriveDragLabelFont(kDragLinkUrlFontSize, FontWeightNormal, systemFont);
FontCachePurgePreventer fontCachePurgePreventer;
bool drawURLString = true;
bool clipURLString = false;
bool clipLabelString = false;
String urlString = url.string();
String label = inLabel.stripWhiteSpace();
if (label.isEmpty()) {
drawURLString = false;
label = urlString;
}
// First step is drawing the link drag image width.
TextRun labelRun(label.impl());
TextRun urlRun(urlString.impl());
IntSize labelSize(labelFont.width(labelRun), labelFont.fontMetrics().ascent() + labelFont.fontMetrics().descent());
if (labelSize.width() > kMaxDragLabelStringWidth) {
labelSize.setWidth(kMaxDragLabelStringWidth);
clipLabelString = true;
}
IntSize urlStringSize;
IntSize imageSize(labelSize.width() + kDragLabelBorderX * 2, labelSize.height() + kDragLabelBorderY * 2);
if (drawURLString) {
urlStringSize.setWidth(urlFont.width(urlRun));
urlStringSize.setHeight(urlFont.fontMetrics().ascent() + urlFont.fontMetrics().descent());
imageSize.setHeight(imageSize.height() + urlStringSize.height());
if (urlStringSize.width() > kMaxDragLabelStringWidth) {
imageSize.setWidth(kMaxDragLabelWidth);
clipURLString = true;
} else
imageSize.setWidth(std::max(labelSize.width(), urlStringSize.width()) + kDragLabelBorderX * 2);
}
// We now know how big the image needs to be, so we create and
// fill the background
IntSize scaledImageSize = imageSize;
scaledImageSize.scale(deviceScaleFactor);
OwnPtr<ImageBuffer> buffer(ImageBuffer::create(scaledImageSize));
if (!buffer)
return nullptr;
buffer->context()->scale(deviceScaleFactor, deviceScaleFactor);
const float DragLabelRadius = 5;
const IntSize radii(DragLabelRadius, DragLabelRadius);
IntRect rect(IntPoint(), imageSize);
const Color backgroundColor(140, 140, 140);
buffer->context()->fillRoundedRect(rect, radii, radii, radii, radii, backgroundColor);
// Draw the text
if (drawURLString) {
if (clipURLString)
urlString = StringTruncator::centerTruncate(urlString, imageSize.width() - (kDragLabelBorderX * 2.0f), urlFont);
IntPoint textPos(kDragLabelBorderX, imageSize.height() - (kLabelBorderYOffset + urlFont.fontMetrics().descent()));
TextRun textRun(urlString);
buffer->context()->drawText(urlFont, TextRunPaintInfo(textRun), textPos);
}
if (clipLabelString)
label = StringTruncator::rightTruncate(label, imageSize.width() - (kDragLabelBorderX * 2.0f), labelFont);
bool hasStrongDirectionality;
TextRun textRun = textRunWithDirectionality(label, hasStrongDirectionality);
IntPoint textPos(kDragLabelBorderX, kDragLabelBorderY + labelFont.fontDescription().computedPixelSize());
if (hasStrongDirectionality && textRun.direction() == RTL) {
float textWidth = urlFont.width(textRun);
int availableWidth = imageSize.width() - kDragLabelBorderX * 2;
textPos.setX(availableWidth - ceilf(textWidth));
}
buffer->context()->drawBidiText(urlFont, TextRunPaintInfo(textRun), textPos);
RefPtr<Image> image = buffer->copyImage();
return DragImage::create(image.get(), DoNotRespectImageOrientation, deviceScaleFactor);
}
DragImage::DragImage(const SkBitmap& bitmap, float resolutionScale)
: m_bitmap(bitmap)
, m_resolutionScale(resolutionScale)
{
}
DragImage::~DragImage()
{
}
void DragImage::fitToMaxSize(const IntSize& srcSize, const IntSize& maxSize)
{
float heightResizeRatio = 0.0f;
float widthResizeRatio = 0.0f;
float resizeRatio = -1.0f;
IntSize originalSize = size();
if (srcSize.width() > maxSize.width()) {
widthResizeRatio = maxSize.width() / static_cast<float>(srcSize.width());
resizeRatio = widthResizeRatio;
}
if (srcSize.height() > maxSize.height()) {
heightResizeRatio = maxSize.height() / static_cast<float>(srcSize.height());
if ((resizeRatio < 0.0f) || (resizeRatio > heightResizeRatio))
resizeRatio = heightResizeRatio;
}
if (srcSize == originalSize) {
if (resizeRatio > 0.0f)
scale(resizeRatio, resizeRatio);
return;
}
// The image was scaled in the webpage so at minimum we must account for that scaling
float scaleX = srcSize.width() / static_cast<float>(originalSize.width());
float scaleY = srcSize.height() / static_cast<float>(originalSize.height());
if (resizeRatio > 0.0f) {
scaleX *= resizeRatio;
scaleY *= resizeRatio;
}
scale(scaleX, scaleY);
}
void DragImage::scale(float scaleX, float scaleY)
{
int imageWidth = scaleX * m_bitmap.width();
int imageHeight = scaleY * m_bitmap.height();
m_bitmap = skia::ImageOperations::Resize(
m_bitmap, skia::ImageOperations::RESIZE_LANCZOS3, imageWidth, imageHeight);
}
void DragImage::dissolveToFraction(float fraction)
{
m_bitmap.setAlphaType(kPremul_SkAlphaType);
SkAutoLockPixels lock(m_bitmap);
for (int row = 0; row < m_bitmap.height(); ++row) {
for (int column = 0; column < m_bitmap.width(); ++column) {
uint32_t* pixel = m_bitmap.getAddr32(column, row);
*pixel = SkPreMultiplyARGB(
SkColorGetA(*pixel) * fraction,
SkColorGetR(*pixel),
SkColorGetG(*pixel),
SkColorGetB(*pixel));
}
}
}
} // namespace blink