NativeImagePtr SVGImage::nativeImageForCurrentFrame()
{
// FIXME: In order to support dynamic SVGs we need to have a way to invalidate this
// frame cache, or better yet, not use a cache for tiled drawing at all, instead
// having a tiled drawing callback (hopefully non-virtual).
if (!m_frameCache) {
m_frameCache.set(ImageBuffer::create(size(), false).release());
if (!m_frameCache) // failed to allocate image
return 0;
renderSubtreeToImage(m_frameCache.get(), m_frame->contentRenderer());
}
return m_frameCache->image()->nativeImageForCurrentFrame();
}
void RenderSVGResourceMasker::createMaskImage(MaskerData* maskerData, const SVGMaskElement* maskElement, RenderObject* object)
{
FloatRect objectBoundingBox = object->objectBoundingBox();
// Mask rect clipped with clippingBoundingBox and filterBoundingBox as long as they are present.
maskerData->maskRect = object->repaintRectInLocalCoordinates();
if (maskerData->maskRect.isEmpty()) {
maskerData->emptyMask = true;
return;
}
if (m_maskBoundaries.isEmpty())
calculateMaskContentRepaintRect();
FloatRect repaintRect = m_maskBoundaries;
AffineTransform contextTransform;
// We need to scale repaintRect for objectBoundingBox to get the drawing area.
if (maskElement->maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
contextTransform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
FloatPoint contextAdjustment = repaintRect.location();
repaintRect = contextTransform.mapRect(repaintRect);
repaintRect.move(objectBoundingBox.x(), objectBoundingBox.y());
contextTransform.translate(-contextAdjustment.x(), -contextAdjustment.y());
}
repaintRect.intersect(maskerData->maskRect);
maskerData->maskRect = repaintRect;
IntRect maskImageRect = enclosingIntRect(maskerData->maskRect);
maskImageRect.setLocation(IntPoint());
// Don't create ImageBuffers with image size of 0
if (maskImageRect.isEmpty()) {
maskerData->emptyMask = true;
return;
}
// FIXME: This changes color space to linearRGB, the default color space
// for masking operations in SVG. We need a switch for the other color-space
// attribute values sRGB, inherit and auto.
maskerData->maskImage = ImageBuffer::create(maskImageRect.size(), LinearRGB);
if (!maskerData->maskImage)
return;
GraphicsContext* maskImageContext = maskerData->maskImage->context();
ASSERT(maskImageContext);
maskImageContext->save();
if (maskElement->maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
maskImageContext->translate(-maskerData->maskRect.x(), -maskerData->maskRect.y());
maskImageContext->concatCTM(contextTransform);
// draw the content into the ImageBuffer
for (Node* node = maskElement->firstChild(); node; node = node->nextSibling()) {
RenderObject* renderer = node->renderer();
if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyled() || !renderer)
continue;
RenderStyle* style = renderer->style();
if (!style || style->display() == NONE || style->visibility() != VISIBLE)
continue;
renderSubtreeToImage(maskerData->maskImage.get(), renderer);
}
maskImageContext->restore();
// create the luminance mask
RefPtr<ImageData> imageData(maskerData->maskImage->getUnmultipliedImageData(maskImageRect));
CanvasPixelArray* srcPixelArray(imageData->data());
for (unsigned pixelOffset = 0; pixelOffset < srcPixelArray->length(); pixelOffset += 4) {
unsigned char a = srcPixelArray->get(pixelOffset + 3);
if (!a)
continue;
unsigned char r = srcPixelArray->get(pixelOffset);
unsigned char g = srcPixelArray->get(pixelOffset + 1);
unsigned char b = srcPixelArray->get(pixelOffset + 2);
double luma = (r * 0.2125 + g * 0.7154 + b * 0.0721) * ((double)a / 255.0);
srcPixelArray->set(pixelOffset + 3, luma);
}
maskerData->maskImage->putUnmultipliedImageData(imageData.get(), maskImageRect, IntPoint());
}
PassOwnPtr<ImageBuffer> RenderSVGResourcePattern::createTileImage(PatternData* patternData,
const SVGPatternElement* patternElement,
RenderObject* object) const
{
PatternAttributes attributes = patternElement->collectPatternProperties();
// If we couldn't determine the pattern content element root, stop here.
if (!attributes.patternContentElement())
return 0;
FloatRect objectBoundingBox = object->objectBoundingBox();
FloatRect patternBoundaries = calculatePatternBoundaries(attributes, objectBoundingBox, patternElement);
AffineTransform patternTransform = attributes.patternTransform();
AffineTransform viewBoxCTM = patternElement->viewBoxToViewTransform(patternElement->viewBox(),
patternElement->preserveAspectRatio(),
patternBoundaries.width(),
patternBoundaries.height());
FloatRect patternBoundariesIncludingOverflow = calculatePatternBoundariesIncludingOverflow(attributes,
objectBoundingBox,
viewBoxCTM,
patternBoundaries);
IntSize imageSize(lroundf(patternBoundariesIncludingOverflow.width()), lroundf(patternBoundariesIncludingOverflow.height()));
// FIXME: We should be able to clip this more, needs investigation
clampImageBufferSizeToViewport(object->document()->view(), imageSize);
// Don't create ImageBuffers with image size of 0
if (imageSize.isEmpty())
return 0;
OwnPtr<ImageBuffer> tileImage = ImageBuffer::create(imageSize);
GraphicsContext* context = tileImage->context();
ASSERT(context);
context->save();
// Translate to pattern start origin
if (patternBoundariesIncludingOverflow.location() != patternBoundaries.location()) {
context->translate(patternBoundaries.x() - patternBoundariesIncludingOverflow.x(),
patternBoundaries.y() - patternBoundariesIncludingOverflow.y());
patternBoundaries.setLocation(patternBoundariesIncludingOverflow.location());
}
// Process viewBox or boundingBoxModeContent correction
if (!viewBoxCTM.isIdentity())
context->concatCTM(viewBoxCTM);
else if (attributes.boundingBoxModeContent()) {
context->translate(objectBoundingBox.x(), objectBoundingBox.y());
context->scale(FloatSize(objectBoundingBox.width(), objectBoundingBox.height()));
}
// Render subtree into ImageBuffer
for (Node* node = attributes.patternContentElement()->firstChild(); node; node = node->nextSibling()) {
if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyled() || !node->renderer())
continue;
renderSubtreeToImage(tileImage.get(), node->renderer());
}
patternData->boundaries = patternBoundaries;
// Compute pattern transformation
patternData->transform.translate(patternBoundaries.x(), patternBoundaries.y());
patternData->transform.multiply(patternTransform);
context->restore();
return tileImage.release();
}
PassOwnPtr<ImageBuffer> SVGMaskElement::drawMaskerContent(const FloatRect& targetRect, FloatRect& maskDestRect) const
{
// Determine specified mask size
float xValue;
float yValue;
float widthValue;
float heightValue;
if (maskUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
xValue = x().valueAsPercentage() * targetRect.width();
yValue = y().valueAsPercentage() * targetRect.height();
widthValue = width().valueAsPercentage() * targetRect.width();
heightValue = height().valueAsPercentage() * targetRect.height();
} else {
xValue = x().value(this);
yValue = y().value(this);
widthValue = width().value(this);
heightValue = height().value(this);
}
IntSize imageSize(lroundf(widthValue), lroundf(heightValue));
clampImageBufferSizeToViewport(document()->view(), imageSize);
if (imageSize.width() < static_cast<int>(widthValue))
widthValue = imageSize.width();
if (imageSize.height() < static_cast<int>(heightValue))
heightValue = imageSize.height();
OwnPtr<ImageBuffer> maskImage = ImageBuffer::create(imageSize, false);
if (!maskImage)
return 0;
maskDestRect = FloatRect(xValue, yValue, widthValue, heightValue);
if (maskUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
maskDestRect.move(targetRect.x(), targetRect.y());
GraphicsContext* maskImageContext = maskImage->context();
ASSERT(maskImageContext);
maskImageContext->save();
maskImageContext->translate(-xValue, -yValue);
if (maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
maskImageContext->save();
maskImageContext->scale(FloatSize(targetRect.width(), targetRect.height()));
}
// Render subtree into ImageBuffer
for (Node* n = firstChild(); n; n = n->nextSibling()) {
SVGElement* elem = 0;
if (n->isSVGElement())
elem = static_cast<SVGElement*>(n);
if (!elem || !elem->isStyled())
continue;
SVGStyledElement* e = static_cast<SVGStyledElement*>(elem);
RenderObject* item = e->renderer();
if (!item)
continue;
renderSubtreeToImage(maskImage.get(), item);
}
if (maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
maskImageContext->restore();
maskImageContext->restore();
return maskImage.release();
}
PassOwnPtr<ImageBuffer> SVGMaskElement::drawMaskerContent(const FloatRect& targetRect, FloatRect& maskDestRect) const
{
// Determine specified mask size
if (maskUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
maskDestRect = FloatRect(x().valueAsPercentage() * targetRect.width(),
y().valueAsPercentage() * targetRect.height(),
width().valueAsPercentage() * targetRect.width(),
height().valueAsPercentage() * targetRect.height());
else
maskDestRect = FloatRect(x().value(this),
y().value(this),
width().value(this),
height().value(this));
IntSize imageSize(lroundf(maskDestRect.width()), lroundf(maskDestRect.height()));
clampImageBufferSizeToViewport(document()->view(), imageSize);
if (imageSize.width() < static_cast<int>(maskDestRect.width()))
maskDestRect.setWidth(imageSize.width());
if (imageSize.height() < static_cast<int>(maskDestRect.height()))
maskDestRect.setHeight(imageSize.height());
// FIXME: This changes color space to linearRGB, the default color space
// for masking operations in SVG. We need a switch for the other color-space
// attribute values sRGB, inherit and auto.
OwnPtr<ImageBuffer> maskImage = ImageBuffer::create(imageSize, LinearRGB);
if (!maskImage)
return 0;
FloatPoint maskContextLocation = maskDestRect.location();
if (maskUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
maskDestRect.move(targetRect.x(), targetRect.y());
if (maskContentUnits() != SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
maskContextLocation.move(targetRect.x(), targetRect.y());
GraphicsContext* maskImageContext = maskImage->context();
ASSERT(maskImageContext);
maskImageContext->save();
maskImageContext->translate(-maskContextLocation.x(), -maskContextLocation.y());
if (maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
maskImageContext->save();
maskImageContext->scale(FloatSize(targetRect.width(), targetRect.height()));
}
// Render subtree into ImageBuffer
for (Node* n = firstChild(); n; n = n->nextSibling()) {
SVGElement* elem = 0;
if (n->isSVGElement())
elem = static_cast<SVGElement*>(n);
if (!elem || !elem->isStyled())
continue;
SVGStyledElement* e = static_cast<SVGStyledElement*>(elem);
RenderObject* item = e->renderer();
if (!item)
continue;
renderSubtreeToImage(maskImage.get(), item);
}
if (maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
maskImageContext->restore();
maskImageContext->restore();
return maskImage.release();
}
