void FEComposite::platformApplySoftware()
{
FilterEffect* in = inputEffect(0);
FilterEffect* in2 = inputEffect(1);
if (m_type == FECOMPOSITE_OPERATOR_ARITHMETIC) {
ByteArray* dstPixelArray = createPremultipliedImageResult();
if (!dstPixelArray)
return;
IntRect effectADrawingRect = requestedRegionOfInputImageData(in->absolutePaintRect());
RefPtr<ByteArray> srcPixelArray = in->asPremultipliedImage(effectADrawingRect);
IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePaintRect());
in2->copyPremultipliedImage(dstPixelArray, effectBDrawingRect);
arithmetic(srcPixelArray.get(), dstPixelArray, m_k1, m_k2, m_k3, m_k4);
return;
}
ImageBuffer* resultImage = createImageBufferResult();
if (!resultImage)
return;
GraphicsContext* filterContext = resultImage->context();
FloatRect srcRect = FloatRect(0, 0, -1, -1);
switch (m_type) {
case FECOMPOSITE_OPERATOR_OVER:
filterContext->drawImageBuffer(in2->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in2->absolutePaintRect()));
filterContext->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in->absolutePaintRect()));
break;
case FECOMPOSITE_OPERATOR_IN: {
GraphicsContextStateSaver stateSaver(*filterContext);
filterContext->clipToImageBuffer(in2->asImageBuffer(), drawingRegionOfInputImage(in2->absolutePaintRect()));
filterContext->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in->absolutePaintRect()));
break;
}
case FECOMPOSITE_OPERATOR_OUT:
filterContext->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in->absolutePaintRect()));
filterContext->drawImageBuffer(in2->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in2->absolutePaintRect()), srcRect, CompositeDestinationOut);
break;
case FECOMPOSITE_OPERATOR_ATOP:
filterContext->drawImageBuffer(in2->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in2->absolutePaintRect()));
filterContext->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in->absolutePaintRect()), srcRect, CompositeSourceAtop);
break;
case FECOMPOSITE_OPERATOR_XOR:
filterContext->drawImageBuffer(in2->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in2->absolutePaintRect()));
filterContext->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in->absolutePaintRect()), srcRect, CompositeXOR);
break;
default:
break;
}
}
void FEComposite::apply(Filter* filter)
{
m_in->apply(filter);
m_in2->apply(filter);
if (!m_in->resultImage() || !m_in2->resultImage())
return;
GraphicsContext* filterContext = getEffectContext();
if (!filterContext)
return;
FloatRect srcRect = FloatRect(0.f, 0.f, -1.f, -1.f);
switch (m_type) {
case FECOMPOSITE_OPERATOR_OVER:
filterContext->drawImageBuffer(m_in2->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in2->scaledSubRegion()));
filterContext->drawImageBuffer(m_in->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in->scaledSubRegion()));
break;
case FECOMPOSITE_OPERATOR_IN:
filterContext->save();
filterContext->clipToImageBuffer(m_in2->resultImage(), calculateDrawingRect(m_in2->scaledSubRegion()));
filterContext->drawImageBuffer(m_in->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in->scaledSubRegion()));
filterContext->restore();
break;
case FECOMPOSITE_OPERATOR_OUT:
filterContext->drawImageBuffer(m_in->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in->scaledSubRegion()));
filterContext->drawImageBuffer(m_in2->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in2->scaledSubRegion()), srcRect, CompositeDestinationOut);
break;
case FECOMPOSITE_OPERATOR_ATOP:
filterContext->drawImageBuffer(m_in2->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in2->scaledSubRegion()));
filterContext->drawImageBuffer(m_in->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in->scaledSubRegion()), srcRect, CompositeSourceAtop);
break;
case FECOMPOSITE_OPERATOR_XOR:
filterContext->drawImageBuffer(m_in2->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in2->scaledSubRegion()));
filterContext->drawImageBuffer(m_in->resultImage(), DeviceColorSpace, calculateDrawingRect(m_in->scaledSubRegion()), srcRect, CompositeXOR);
break;
case FECOMPOSITE_OPERATOR_ARITHMETIC: {
IntRect effectADrawingRect = calculateDrawingIntRect(m_in->scaledSubRegion());
RefPtr<CanvasPixelArray> srcPixelArrayA(m_in->resultImage()->getPremultipliedImageData(effectADrawingRect)->data());
IntRect effectBDrawingRect = calculateDrawingIntRect(m_in2->scaledSubRegion());
RefPtr<ImageData> imageData(m_in2->resultImage()->getPremultipliedImageData(effectBDrawingRect));
CanvasPixelArray* srcPixelArrayB(imageData->data());
arithmetic(srcPixelArrayA, srcPixelArrayB, m_k1, m_k2, m_k3, m_k4);
resultImage()->putPremultipliedImageData(imageData.get(), IntRect(IntPoint(), resultImage()->size()), IntPoint());
}
break;
default:
break;
}
}
void SourceAlpha::apply(Filter* filter)
{
GraphicsContext* filterContext = getEffectContext();
if (!filterContext)
return;
setIsAlphaImage(true);
FloatRect imageRect(FloatPoint(), filter->sourceImage()->size());
filterContext->save();
filterContext->clipToImageBuffer(filter->sourceImage(), imageRect);
filterContext->fillRect(imageRect, Color::black, DeviceColorSpace);
filterContext->restore();
}
void SourceAlpha::apply()
{
GraphicsContext* filterContext = effectContext();
Filter* filter = this->filter();
if (!filterContext || !filter->sourceImage())
return;
setIsAlphaImage(true);
FloatRect imageRect(FloatPoint(), absolutePaintRect().size());
filterContext->save();
filterContext->clipToImageBuffer(filter->sourceImage(), imageRect);
filterContext->fillRect(imageRect, Color::black, ColorSpaceDeviceRGB);
filterContext->restore();
}
void SVGRenderingContext::clipToImageBuffer(GraphicsContext& context, const AffineTransform& absoluteTransform, const FloatRect& targetRect, std::unique_ptr<ImageBuffer>& imageBuffer, bool safeToClear)
{
if (!imageBuffer)
return;
FloatRect absoluteTargetRect = calculateImageBufferRect(targetRect, absoluteTransform);
// The mask image has been created in the absolute coordinate space, as the image should not be scaled.
// So the actual masking process has to be done in the absolute coordinate space as well.
context.concatCTM(absoluteTransform.inverse().valueOr(AffineTransform()));
context.clipToImageBuffer(*imageBuffer, absoluteTargetRect);
context.concatCTM(absoluteTransform);
// When nesting resources, with objectBoundingBox as content unit types, there's no use in caching the
// resulting image buffer as the parent resource already caches the result.
if (safeToClear && !currentContentTransformation().isIdentity())
imageBuffer.reset();
}
void CanvasRenderingContext2D::drawTextInternal(const String& text, float x, float y, bool fill, float /*maxWidth*/, bool /*useMaxWidth*/)
{
GraphicsContext* c = drawingContext();
if (!c)
return;
if (!state().m_invertibleCTM)
return;
const Font& font = accessFont();
// FIXME: Handle maxWidth.
// FIXME: Need to turn off font smoothing.
bool rtl = canvas()->computedStyle() ? canvas()->computedStyle()->direction() == RTL : false;
bool override = canvas()->computedStyle() ? canvas()->computedStyle()->unicodeBidi() == Override : false;
unsigned length = text.length();
const UChar* string = text.characters();
TextRun textRun(string, length, 0, 0, 0, rtl, override, false, false);
// Draw the item text at the correct point.
FloatPoint location(x, y);
switch (state().m_textBaseline) {
case TopTextBaseline:
case HangingTextBaseline:
location.setY(y + font.ascent());
break;
case BottomTextBaseline:
case IdeographicTextBaseline:
location.setY(y - font.descent());
break;
case MiddleTextBaseline:
location.setY(y - font.descent() + font.height() / 2);
break;
case AlphabeticTextBaseline:
default:
// Do nothing.
break;
}
float width = font.width(TextRun(text, false, 0, 0, rtl, override));
TextAlign align = state().m_textAlign;
if (align == StartTextAlign)
align = rtl ? RightTextAlign : LeftTextAlign;
else if (align == EndTextAlign)
align = rtl ? LeftTextAlign : RightTextAlign;
switch (align) {
case CenterTextAlign:
location.setX(location.x() - width / 2);
break;
case RightTextAlign:
location.setX(location.x() - width);
break;
default:
break;
}
// The slop built in to this mask rect matches the heuristic used in FontCGWin.cpp for GDI text.
FloatRect textRect = FloatRect(location.x() - font.height() / 2, location.y() - font.ascent() - font.lineGap(),
width + font.height(), font.lineSpacing());
if (!fill)
textRect.inflate(c->strokeThickness() / 2);
if (fill)
canvas()->willDraw(textRect);
else {
// When stroking text, pointy miters can extend outside of textRect, so we
// punt and dirty the whole canvas.
canvas()->willDraw(FloatRect(0, 0, canvas()->width(), canvas()->height()));
}
#if PLATFORM(CG)
CanvasStyle* drawStyle = fill ? state().m_fillStyle.get() : state().m_strokeStyle.get();
if (drawStyle->canvasGradient() || drawStyle->canvasPattern()) {
// FIXME: The rect is not big enough for miters on stroked text.
IntRect maskRect = enclosingIntRect(textRect);
OwnPtr<ImageBuffer> maskImage = ImageBuffer::create(maskRect.size());
GraphicsContext* maskImageContext = maskImage->context();
if (fill)
maskImageContext->setFillColor(Color::black, DeviceColorSpace);
else {
maskImageContext->setStrokeColor(Color::black, DeviceColorSpace);
maskImageContext->setStrokeThickness(c->strokeThickness());
}
maskImageContext->setTextDrawingMode(fill ? cTextFill : cTextStroke);
maskImageContext->translate(-maskRect.x(), -maskRect.y());
maskImageContext->drawBidiText(font, textRun, location);
c->save();
c->clipToImageBuffer(maskRect, maskImage.get());
drawStyle->applyFillColor(c);
c->fillRect(maskRect);
c->restore();
return;
}
#endif
c->setTextDrawingMode(fill ? cTextFill : cTextStroke);
c->drawBidiText(font, textRun, location);
}