SkImageFilter* CanvasRenderingContext2DState::getFilter(Element* styleResolutionHost, const Font& font) const
{
if (!m_filterValue)
return nullptr;
if (!m_resolvedFilter) {
RefPtr<ComputedStyle> filterStyle = ComputedStyle::create();
// Must set font in case the filter uses any font-relative units (em, ex)
filterStyle->setFont(font);
StyleResolverState resolverState(styleResolutionHost->document(), styleResolutionHost, filterStyle.get());
resolverState.setStyle(filterStyle);
// TODO(junov): crbug.com/502877 Feed m_fillStyle and m_strokeStyle into FillPaint and
// StrokePaint respectively for filters that reference SVG.
StyleBuilder::applyProperty(CSSPropertyWebkitFilter, resolverState, m_filterValue.get());
RefPtrWillBeRawPtr<FilterEffectBuilder> filterEffectBuilder = FilterEffectBuilder::create();
const float effectiveZoom = 1.0f; // Deliberately ignore zoom on the canvas element
filterEffectBuilder->build(styleResolutionHost, filterStyle->filter(), effectiveZoom);
SkiaImageFilterBuilder imageFilterBuilder;
RefPtrWillBeRawPtr<FilterEffect> lastEffect = filterEffectBuilder->lastEffect();
m_resolvedFilter = imageFilterBuilder.build(lastEffect.get(), ColorSpaceDeviceRGB);
}
return m_resolvedFilter.get();
}
SkImageFilter* CanvasRenderingContext2DState::getFilter(Element* styleResolutionHost, const Font& font, IntSize canvasSize) const
{
if (!m_filterValue)
return nullptr;
if (!m_resolvedFilter) {
RefPtr<ComputedStyle> filterStyle = ComputedStyle::create();
// Must set font in case the filter uses any font-relative units (em, ex)
filterStyle->setFont(font);
StyleResolverState resolverState(styleResolutionHost->document(), styleResolutionHost, filterStyle.get());
resolverState.setStyle(filterStyle);
StyleBuilder::applyProperty(CSSPropertyWebkitFilter, resolverState, m_filterValue.get());
RefPtrWillBeRawPtr<FilterEffectBuilder> filterEffectBuilder = FilterEffectBuilder::create();
// We can't reuse m_fillPaint and m_strokePaint for the filter, since these incorporate
// the global alpha, which isn't applicable here.
SkPaint fillPaintForFilter;
SkPaint strokePaintForFilter;
m_fillStyle->applyToPaint(fillPaintForFilter);
m_strokeStyle->applyToPaint(strokePaintForFilter);
fillPaintForFilter.setColor(m_fillStyle->paintColor());
strokePaintForFilter.setColor(m_strokeStyle->paintColor());
FloatSize floatCanvasSize(canvasSize);
const double effectiveZoom = 1.0; // Deliberately ignore zoom on the canvas element
filterEffectBuilder->build(styleResolutionHost, filterStyle->filter(), effectiveZoom, &floatCanvasSize, &fillPaintForFilter, &strokePaintForFilter);
SkiaImageFilterBuilder imageFilterBuilder;
RefPtrWillBeRawPtr<FilterEffect> lastEffect = filterEffectBuilder->lastEffect();
m_resolvedFilter = imageFilterBuilder.build(lastEffect.get(), ColorSpaceDeviceRGB);
}
return m_resolvedFilter.get();
}
PassRefPtr<SkImageFilter> FEBlend::createImageFilter(SkiaImageFilterBuilder& builder)
{
RefPtr<SkImageFilter> foreground(builder.build(inputEffect(0), operatingColorSpace()));
RefPtr<SkImageFilter> background(builder.build(inputEffect(1), operatingColorSpace()));
sk_sp<SkXfermode> mode(SkXfermode::Make(WebCoreCompositeToSkiaComposite(CompositeSourceOver, m_mode)));
SkImageFilter::CropRect cropRect = getCropRect();
return fromSkSp(SkXfermodeImageFilter::Make(std::move(mode), background.get(), foreground.get(), &cropRect));
}
FilterPainter::FilterPainter(DeprecatedPaintLayer& layer, GraphicsContext* context, const LayoutPoint& offsetFromRoot, const ClipRect& clipRect, DeprecatedPaintLayerPaintingInfo& paintingInfo, PaintLayerFlags paintFlags,
LayoutRect& rootRelativeBounds, bool& rootRelativeBoundsComputed)
: m_filterInProgress(false)
, m_context(context)
, m_layoutObject(layer.layoutObject())
{
if (!layer.filterEffectBuilder() || !layer.paintsWithFilters())
return;
ASSERT(layer.filterInfo());
SkiaImageFilterBuilder builder;
RefPtrWillBeRawPtr<FilterEffect> lastEffect = layer.filterEffectBuilder()->lastEffect();
lastEffect->determineFilterPrimitiveSubregion(MapRectForward);
RefPtr<SkImageFilter> imageFilter = builder.build(lastEffect.get(), ColorSpaceDeviceRGB);
if (!imageFilter)
return;
if (!rootRelativeBoundsComputed) {
rootRelativeBounds = layer.physicalBoundingBoxIncludingReflectionAndStackingChildren(paintingInfo.rootLayer, offsetFromRoot);
rootRelativeBoundsComputed = true;
}
// We'll handle clipping to the dirty rect before filter rasterization.
// Filter processing will automatically expand the clip rect and the offscreen to accommodate any filter outsets.
// FIXME: It is incorrect to just clip to the damageRect here once multiple fragments are involved.
// Subsequent code should not clip to the dirty rect, since we've already
// done it above, and doing it later will defeat the outsets.
paintingInfo.clipToDirtyRect = false;
if (clipRect.rect() != paintingInfo.paintDirtyRect || clipRect.hasRadius()) {
m_clipRecorder = adoptPtr(new LayerClipRecorder(*context, *layer.layoutObject(), DisplayItem::ClipLayerFilter, clipRect, &paintingInfo, LayoutPoint(), paintFlags));
}
ASSERT(m_layoutObject);
if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
ASSERT(context->displayItemList());
if (!context->displayItemList()->displayItemConstructionIsDisabled()) {
FilterOperations filterOperations(layer.computeFilterOperations(m_layoutObject->styleRef()));
OwnPtr<WebFilterOperations> webFilterOperations = adoptPtr(Platform::current()->compositorSupport()->createFilterOperations());
builder.buildFilterOperations(filterOperations, webFilterOperations.get());
// FIXME: It's possible to have empty WebFilterOperations here even
// though the SkImageFilter produced above is non-null, since the
// layer's FilterEffectBuilder can have a stale representation of
// the layer's filter. See crbug.com/502026.
if (webFilterOperations->isEmpty())
return;
context->displayItemList()->createAndAppend<BeginFilterDisplayItem>(*m_layoutObject, imageFilter, rootRelativeBounds, webFilterOperations.release());
}
} else {
BeginFilterDisplayItem filterDisplayItem(*m_layoutObject, imageFilter, rootRelativeBounds);
filterDisplayItem.replay(*context);
}
m_filterInProgress = true;
}
PassRefPtr<SkImageFilter> FEMorphology::createImageFilter(SkiaImageFilterBuilder& builder)
{
RefPtr<SkImageFilter> input(builder.build(inputEffect(0), operatingColorSpace()));
SkScalar radiusX = SkFloatToScalar(filter()->applyHorizontalScale(m_radiusX));
SkScalar radiusY = SkFloatToScalar(filter()->applyVerticalScale(m_radiusY));
SkImageFilter::CropRect rect = getCropRect();
if (m_type == FEMORPHOLOGY_OPERATOR_DILATE)
return adoptRef(SkDilateImageFilter::Create(radiusX, radiusY, input.get(), &rect));
return adoptRef(SkErodeImageFilter::Create(radiusX, radiusY, input.get(), &rect));
}
PassRefPtr<SkImageFilter> SourceAlpha::createImageFilter(SkiaImageFilterBuilder& builder)
{
RefPtr<SkImageFilter> sourceGraphic(builder.build(inputEffect(0), operatingColorSpace()));
SkScalar matrix[20] = {
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, SK_Scalar1, 0
};
RefPtr<SkColorFilter> colorFilter(adoptRef(SkColorMatrixFilter::Create(matrix)));
return adoptRef(SkColorFilterImageFilter::Create(colorFilter.get(), sourceGraphic.get()));
}
PassRefPtr<SkImageFilter> FEComponentTransfer::createImageFilter(SkiaImageFilterBuilder& builder)
{
RefPtr<SkImageFilter> input(builder.build(inputEffect(0), operatingColorSpace()));
unsigned char rValues[256], gValues[256], bValues[256], aValues[256];
getValues(rValues, gValues, bValues, aValues);
SkAutoTUnref<SkColorFilter> colorFilter(SkTableColorFilter::CreateARGB(aValues, rValues, gValues, bValues));
SkImageFilter::CropRect cropRect = getCropRect(builder.cropOffset());
return adoptRef(SkColorFilterImageFilter::Create(colorFilter, input.get(), &cropRect));
}
PassRefPtr<SkImageFilter> FEMerge::createImageFilter(SkiaImageFilterBuilder& builder)
{
unsigned size = numberOfEffectInputs();
OwnPtr<RefPtr<SkImageFilter>[]> inputRefs = adoptArrayPtr(new RefPtr<SkImageFilter>[size]);
OwnPtr<SkImageFilter*[]> inputs = adoptArrayPtr(new SkImageFilter*[size]);
for (unsigned i = 0; i < size; ++i) {
inputRefs[i] = builder.build(inputEffect(i), operatingColorSpace());
inputs[i] = inputRefs[i].get();
}
SkImageFilter::CropRect rect = getCropRect(builder.cropOffset());
return adoptRef(SkMergeImageFilter::Create(inputs.get(), size, 0, &rect));
}
PassRefPtr<SkImageFilter> FELighting::createImageFilter(SkiaImageFilterBuilder& builder)
{
if (!m_lightSource)
return createTransparentBlack(builder);
SkImageFilter::CropRect rect = getCropRect(builder.cropOffset());
Color lightColor = adaptColorToOperatingColorSpace(m_lightingColor);
RefPtr<SkImageFilter> input(builder.build(inputEffect(0), operatingColorSpace()));
switch (m_lightSource->type()) {
case LS_DISTANT: {
DistantLightSource* distantLightSource = static_cast<DistantLightSource*>(m_lightSource.get());
float azimuthRad = deg2rad(distantLightSource->azimuth());
float elevationRad = deg2rad(distantLightSource->elevation());
const SkPoint3 direction = SkPoint3::Make(cosf(azimuthRad) * cosf(elevationRad), sinf(azimuthRad) * cosf(elevationRad), sinf(elevationRad));
if (m_specularConstant > 0)
return adoptRef(SkLightingImageFilter::CreateDistantLitSpecular(direction, lightColor.rgb(), m_surfaceScale, m_specularConstant, m_specularExponent, input.get(), &rect));
return adoptRef(SkLightingImageFilter::CreateDistantLitDiffuse(direction, lightColor.rgb(), m_surfaceScale, m_diffuseConstant, input.get(), &rect));
}
case LS_POINT: {
PointLightSource* pointLightSource = static_cast<PointLightSource*>(m_lightSource.get());
const FloatPoint3D position = pointLightSource->position();
const SkPoint3 skPosition = SkPoint3::Make(position.x(), position.y(), position.z());
if (m_specularConstant > 0)
return adoptRef(SkLightingImageFilter::CreatePointLitSpecular(skPosition, lightColor.rgb(), m_surfaceScale, m_specularConstant, m_specularExponent, input.get(), &rect));
return adoptRef(SkLightingImageFilter::CreatePointLitDiffuse(skPosition, lightColor.rgb(), m_surfaceScale, m_diffuseConstant, input.get(), &rect));
}
case LS_SPOT: {
SpotLightSource* spotLightSource = static_cast<SpotLightSource*>(m_lightSource.get());
const SkPoint3 location = SkPoint3::Make(spotLightSource->position().x(), spotLightSource->position().y(), spotLightSource->position().z());
const SkPoint3 target = SkPoint3::Make(spotLightSource->direction().x(), spotLightSource->direction().y(), spotLightSource->direction().z());
float specularExponent = spotLightSource->specularExponent();
float limitingConeAngle = spotLightSource->limitingConeAngle();
if (!limitingConeAngle || limitingConeAngle > 90 || limitingConeAngle < -90)
limitingConeAngle = 90;
if (m_specularConstant > 0)
return adoptRef(SkLightingImageFilter::CreateSpotLitSpecular(location, target, specularExponent, limitingConeAngle, lightColor.rgb(), m_surfaceScale, m_specularConstant, m_specularExponent, input.get(), &rect));
return adoptRef(SkLightingImageFilter::CreateSpotLitDiffuse(location, target, specularExponent, limitingConeAngle, lightColor.rgb(), m_surfaceScale, m_diffuseConstant, input.get(), &rect));
}
default:
ASSERT_NOT_REACHED();
return nullptr;
}
}
PassRefPtr<SkImageFilter> FEConvolveMatrix::createImageFilter(SkiaImageFilterBuilder& builder)
{
if (!parametersValid())
return createTransparentBlack(builder);
RefPtr<SkImageFilter> input(builder.build(inputEffect(0), operatingColorSpace()));
SkISize kernelSize(SkISize::Make(m_kernelSize.width(), m_kernelSize.height()));
// parametersValid() above checks that the kernel area fits in int.
int numElements = safeCast<int>(m_kernelSize.area());
SkScalar gain = SkFloatToScalar(1.0f / m_divisor);
SkScalar bias = SkFloatToScalar(m_bias * 255);
SkIPoint target = SkIPoint::Make(m_targetOffset.x(), m_targetOffset.y());
SkMatrixConvolutionImageFilter::TileMode tileMode = toSkiaTileMode(m_edgeMode);
bool convolveAlpha = !m_preserveAlpha;
OwnPtr<SkScalar[]> kernel = adoptArrayPtr(new SkScalar[numElements]);
for (int i = 0; i < numElements; ++i)
kernel[i] = SkFloatToScalar(m_kernelMatrix[numElements - 1 - i]);
SkImageFilter::CropRect cropRect = getCropRect(builder.cropOffset());
return adoptRef(SkMatrixConvolutionImageFilter::Create(kernelSize, kernel.get(), gain, bias, target, tileMode, convolveAlpha, input.get(), &cropRect));
}
static void paintFilteredContent(const LayoutObject& object, GraphicsContext& context, FilterData* filterData)
{
ASSERT(filterData->m_state == FilterData::ReadyToPaint);
ASSERT(filterData->filter->sourceGraphic());
filterData->m_state = FilterData::PaintingFilter;
SkiaImageFilterBuilder builder;
RefPtr<SkImageFilter> imageFilter = builder.build(filterData->filter->lastEffect(), ColorSpaceDeviceRGB);
FloatRect boundaries = filterData->filter->filterRegion();
context.save();
// Clip drawing of filtered image to the minimum required paint rect.
FilterEffect* lastEffect = filterData->filter->lastEffect();
context.clipRect(lastEffect->determineAbsolutePaintRect(lastEffect->maxEffectRect()));
#ifdef CHECK_CTM_FOR_TRANSFORMED_IMAGEFILTER
// TODO: Remove this workaround once skew/rotation support is added in Skia
// (https://code.google.com/p/skia/issues/detail?id=3288, crbug.com/446935).
// If the CTM contains rotation or shearing, apply the filter to
// the unsheared/unrotated matrix, and do the shearing/rotation
// as a final pass.
AffineTransform ctm = SVGLayoutSupport::deprecatedCalculateTransformToLayer(&object);
if (ctm.b() || ctm.c()) {
AffineTransform scaleAndTranslate;
scaleAndTranslate.translate(ctm.e(), ctm.f());
scaleAndTranslate.scale(ctm.xScale(), ctm.yScale());
ASSERT(scaleAndTranslate.isInvertible());
AffineTransform shearAndRotate = scaleAndTranslate.inverse();
shearAndRotate.multiply(ctm);
context.concatCTM(shearAndRotate.inverse());
imageFilter = builder.buildTransform(shearAndRotate, imageFilter.get());
}
#endif
context.beginLayer(1, SkXfermode::kSrcOver_Mode, &boundaries, ColorFilterNone, imageFilter.get());
context.endLayer();
context.restore();
filterData->m_state = FilterData::ReadyToPaint;
}
PassRefPtr<SkImageFilter> FEBoxReflect::createImageFilter(SkiaImageFilterBuilder& builder)
{
RefPtr<SkImageFilter> input(builder.build(inputEffect(0), operatingColorSpace()));
return builder.buildBoxReflectFilter(m_reflectionDirection, m_offset, nullptr, input.get());
}
void colorSpaceTest()
{
// Build filter tree
RefPtr<ReferenceFilter> referenceFilter = ReferenceFilter::create();
// Add a dummy source graphic input
RefPtr<FilterEffect> sourceEffect = referenceFilter->sourceGraphic();
sourceEffect->setOperatingColorSpace(ColorSpaceDeviceRGB);
// Add a blur effect (with input : source)
RefPtr<FilterEffect> blurEffect =
FEGaussianBlur::create(referenceFilter.get(), 3.0f, 3.0f);
blurEffect->setOperatingColorSpace(ColorSpaceLinearRGB);
blurEffect->inputEffects().append(sourceEffect);
// Add a blend effect (with inputs : blur, source)
RefPtr<FilterEffect> blendEffect =
FEBlend::create(referenceFilter.get(), FEBLEND_MODE_NORMAL);
blendEffect->setOperatingColorSpace(ColorSpaceDeviceRGB);
FilterEffectVector& blendInputs = blendEffect->inputEffects();
blendInputs.reserveCapacity(2);
blendInputs.append(sourceEffect);
blendInputs.append(blurEffect);
// Add a merge effect (with inputs : blur, blend)
RefPtr<FilterEffect> mergeEffect = FEMerge::create(referenceFilter.get());
mergeEffect->setOperatingColorSpace(ColorSpaceLinearRGB);
FilterEffectVector& mergeInputs = mergeEffect->inputEffects();
mergeInputs.reserveCapacity(2);
mergeInputs.append(blurEffect);
mergeInputs.append(blendEffect);
referenceFilter->setLastEffect(mergeEffect);
// Get SkImageFilter resulting tree
SkiaImageFilterBuilder builder;
RefPtr<SkImageFilter> filter = builder.build(referenceFilter->lastEffect(), ColorSpaceDeviceRGB);
// Let's check that the resulting tree looks like this :
// ColorSpace (Linear->Device) : CS (L->D)
// |
// Merge (L)
// | |
// | CS (D->L)
// | |
// | Blend (D)
// | / |
// | CS (L->D) |
// | / |
// Blur (L) |
// \ |
// CS (D->L) |
// \ |
// Source Graphic (D)
EXPECT_EQ(filter->countInputs(), 1); // Should be CS (L->D)
SkImageFilter* child = filter->getInput(0); // Should be Merge
EXPECT_EQ(child->asColorFilter(0), false);
EXPECT_EQ(child->countInputs(), 2);
child = child->getInput(1); // Should be CS (D->L)
EXPECT_EQ(child->asColorFilter(0), true);
EXPECT_EQ(child->countInputs(), 1);
child = child->getInput(0); // Should be Blend
EXPECT_EQ(child->asColorFilter(0), false);
EXPECT_EQ(child->countInputs(), 2);
child = child->getInput(0); // Should be CS (L->D)
EXPECT_EQ(child->asColorFilter(0), true);
EXPECT_EQ(child->countInputs(), 1);
child = child->getInput(0); // Should be Blur
EXPECT_EQ(child->asColorFilter(0), false);
EXPECT_EQ(child->countInputs(), 1);
child = child->getInput(0); // Should be CS (D->L)
EXPECT_EQ(child->asColorFilter(0), true);
EXPECT_EQ(child->countInputs(), 1);
}