void SVGImage::drawPatternForContainer(GraphicsContext& context, const FloatSize containerSize,
float zoom, const FloatRect& srcRect, const FloatSize& tileScale, const FloatPoint& phase,
SkXfermode::Mode compositeOp, const FloatRect& dstRect,
const FloatSize& repeatSpacing, const KURL& url)
{
// Tile adjusted for scaling/stretch.
FloatRect tile(srcRect);
tile.scale(tileScale.width(), tileScale.height());
// Expand the tile to account for repeat spacing.
FloatRect spacedTile(tile);
spacedTile.expand(FloatSize(repeatSpacing));
SkPictureBuilder patternPicture(spacedTile, nullptr, &context);
if (!DrawingRecorder::useCachedDrawingIfPossible(patternPicture.context(), *this, DisplayItem::Type::SVGImage)) {
DrawingRecorder patternPictureRecorder(patternPicture.context(), *this, DisplayItem::Type::SVGImage, spacedTile);
// When generating an expanded tile, make sure we don't draw into the spacing area.
if (tile != spacedTile)
patternPicture.context().clip(tile);
SkPaint paint;
drawForContainer(patternPicture.context().canvas(), paint, containerSize, zoom, tile, srcRect, url);
}
RefPtr<const SkPicture> tilePicture = patternPicture.endRecording();
SkMatrix patternTransform;
patternTransform.setTranslate(phase.x() + spacedTile.x(), phase.y() + spacedTile.y());
RefPtr<SkShader> patternShader = adoptRef(SkShader::CreatePictureShader(
tilePicture.get(), SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
&patternTransform, nullptr));
SkPaint paint;
paint.setShader(patternShader.get());
paint.setXfermodeMode(compositeOp);
paint.setColorFilter(context.colorFilter());
context.drawRect(dstRect, paint);
}
