DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)
{
// FIXME: due to the way drag images are done on windows we need
// to preprocess the alpha channel <rdar://problem/5015946>
if (!image)
return 0;
IntSize srcSize = dragImageSize(image);
IntSize dstSize(static_cast<int>(srcSize.width() * scale.width()), static_cast<int>(srcSize.height() * scale.height()));
HBITMAP hbmp = 0;
HDC dc = GetDC(0);
HDC dstDC = CreateCompatibleDC(dc);
if (!dstDC)
goto exit;
PlatformContextCairo* targetContext;
hbmp = allocImage(dstDC, dstSize, &targetContext);
if (!hbmp)
goto exit;
cairo_surface_t* srcImage = createCairoContextFromBitmap(image);
// Scale the target surface to the new image size, and flip it
// so that when we set the srcImage as the surface it will draw
// right-side-up.
cairo_t* cr = targetContext->cr();
cairo_translate(cr, 0, dstSize.height());
cairo_scale(cr, scale.width(), -scale.height());
cairo_set_source_surface(cr, srcImage, 0.0, 0.0);
// Now we can paint and get the correct result
cairo_paint(cr);
cairo_surface_destroy(srcImage);
deallocContext(targetContext);
::DeleteObject(image);
image = 0;
exit:
if (!hbmp)
hbmp = image;
if (dstDC)
DeleteDC(dstDC);
ReleaseDC(0, dc);
return hbmp;
}
DragImageRef createDragImageFromImage(Image* img, RespectImageOrientationEnum)
{
HBITMAP hbmp = 0;
HDC dc = GetDC(0);
HDC workingDC = CreateCompatibleDC(dc);
if (!workingDC)
goto exit;
PlatformContextCairo* drawContext = 0;
hbmp = allocImage(workingDC, img->size(), &drawContext);
if (!hbmp)
goto exit;
if (!drawContext) {
::DeleteObject(hbmp);
hbmp = 0;
}
cairo_t* cr = drawContext->cr();
cairo_set_source_rgb(cr, 1.0, 0.0, 1.0);
cairo_fill_preserve(cr);
NativeImageCairo* srcNativeImage = img->nativeImageForCurrentFrame();
cairo_surface_t* srcImage = (srcNativeImage) ? srcNativeImage->surface() : 0;
if (srcImage) {
// Draw the image.
cairo_set_source_surface(cr, srcImage, 0.0, 0.0);
cairo_paint(cr);
}
deallocContext(drawContext);
exit:
if (workingDC)
DeleteDC(workingDC);
ReleaseDC(0, dc);
return hbmp;
}
DragImageRef createDragImageFromImage(Image* img, ImageOrientationDescription)
{
HBITMAP hbmp = 0;
HDC dc = GetDC(0);
HDC workingDC = CreateCompatibleDC(dc);
if (!workingDC)
goto exit;
PlatformContextCairo* drawContext = 0;
hbmp = allocImage(workingDC, img->size(), &drawContext);
if (!hbmp)
goto exit;
if (!drawContext) {
::DeleteObject(hbmp);
hbmp = 0;
}
{ // This block is required due to the msvc compiler error C2362.
cairo_t* cr = drawContext->cr();
cairo_set_source_rgb(cr, 1.0, 0.0, 1.0);
cairo_fill_preserve(cr);
RefPtr<cairo_surface_t> surface = img->nativeImageForCurrentFrame();
if (surface) {
// Draw the image.
cairo_set_source_surface(cr, surface.get(), 0.0, 0.0);
cairo_paint(cr);
}
}
deallocContext(drawContext);
exit:
if (workingDC)
DeleteDC(workingDC);
ReleaseDC(0, dc);
return hbmp;
}
DragImageRef createDragImageForLink(URL& url, const String& inLabel, FontRenderingMode fontRenderingMode)
{
// This is more or less an exact match for the Mac OS X code.
const Font* labelFont;
const Font* urlFont;
FontCachePurgePreventer fontCachePurgePreventer;
if (fontRenderingMode == AlternateRenderingMode) {
static const Font alternateRenderingModeLabelFont = dragLabelFont(DragLinkLabelFontsize, true, AlternateRenderingMode);
static const Font alternateRenderingModeURLFont = dragLabelFont(DragLinkUrlFontSize, false, AlternateRenderingMode);
labelFont = &alternateRenderingModeLabelFont;
urlFont = &alternateRenderingModeURLFont;
} else {
static const Font normalRenderingModeLabelFont = dragLabelFont(DragLinkLabelFontsize, true, NormalRenderingMode);
static const Font normalRenderingModeURLFont = dragLabelFont(DragLinkUrlFontSize, false, NormalRenderingMode);
labelFont = &normalRenderingModeLabelFont;
urlFont = &normalRenderingModeURLFont;
}
bool drawURLString = true;
bool clipURLString = false;
bool clipLabelString = false;
String urlString = url.string();
String label = inLabel;
if (label.isEmpty()) {
drawURLString = false;
label = urlString;
}
// First step in 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() > MaxDragLabelStringWidth) {
labelSize.setWidth(MaxDragLabelStringWidth);
clipLabelString = true;
}
IntSize urlStringSize;
IntSize imageSize(labelSize.width() + DragLabelBorderX * 2, labelSize.height() + DragLabelBorderY * 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() > MaxDragLabelStringWidth) {
imageSize.setWidth(MaxDragLabelWidth);
clipURLString = true;
} else
imageSize.setWidth(std::max(labelSize.width(), urlStringSize.width()) + DragLabelBorderX * 2);
}
// We now know how big the image needs to be, so we create and
// fill the background
HWndDC dc(0);
auto workingDC = adoptGDIObject(::CreateCompatibleDC(dc));
if (!workingDC)
return 0;
PlatformGraphicsContext* contextRef;
auto image = allocImage(workingDC.get(), imageSize, &contextRef);
if (!image)
return 0;
::SelectObject(workingDC.get(), image.get());
GraphicsContext context(contextRef);
// On Mac alpha is {0.7, 0.7, 0.7, 0.8}, however we can't control alpha
// for drag images on win, so we use 1
static const Color backgroundColor(140, 140, 140);
static const IntSize radii(DragLabelRadius, DragLabelRadius);
IntRect rect(0, 0, imageSize.width(), imageSize.height());
context.fillRoundedRect(FloatRoundedRect(rect, radii, radii, radii, radii), backgroundColor, ColorSpaceDeviceRGB);
// Draw the text
static const Color topColor(0, 0, 0, 255); // original alpha = 0.75
static const Color bottomColor(255, 255, 255, 127); // original alpha = 0.5
if (drawURLString) {
if (clipURLString)
urlString = StringTruncator::rightTruncate(urlString, imageSize.width() - (DragLabelBorderX * 2.0f), *urlFont, StringTruncator::EnableRoundingHacks);
IntPoint textPos(DragLabelBorderX, imageSize.height() - (LabelBorderYOffset + urlFont->fontMetrics().descent()));
WebCoreDrawDoubledTextAtPoint(context, urlString, textPos, *urlFont, topColor, bottomColor);
}
if (clipLabelString)
label = StringTruncator::rightTruncate(label, imageSize.width() - (DragLabelBorderX * 2.0f), *labelFont, StringTruncator::EnableRoundingHacks);
IntPoint textPos(DragLabelBorderX, DragLabelBorderY + labelFont->pixelSize());
WebCoreDrawDoubledTextAtPoint(context, label, textPos, *labelFont, topColor, bottomColor);
deallocContext(contextRef);
return image.leak();
}