String SVGTransformList::valueAsString() const
{
// TODO: We may want to build a real transform string, instead of concatting to a matrix(...).
SVGTransform transform = concatenate();
if (transform.type() == SVGTransform::SVG_TRANSFORM_MATRIX) {
AffineTransform matrix = transform.matrix();
return String::format("matrix(%f %f %f %f %f %f)", matrix.a(), matrix.b(), matrix.c(), matrix.d(), matrix.e(), matrix.f());
}
return String();
}
// static
void Shader::affineTo3x3(const AffineTransform& transform, float mat[9])
{
mat[0] = transform.a();
mat[1] = transform.b();
mat[2] = 0.0f;
mat[3] = transform.c();
mat[4] = transform.d();
mat[5] = 0.0f;
mat[6] = transform.e();
mat[7] = transform.f();
mat[8] = 1.0f;
}
static void drawDeferredFilter(GraphicsContext* context, FilterData* filterData, SVGFilterElement* filterElement)
{
SkiaImageFilterBuilder builder(context);
SourceGraphic* sourceGraphic = static_cast<SourceGraphic*>(filterData->builder->getEffectById(SourceGraphic::effectName()));
ASSERT(sourceGraphic);
builder.setSourceGraphic(sourceGraphic);
RefPtr<ImageFilter> imageFilter = builder.build(filterData->builder->lastEffect(), ColorSpaceDeviceRGB);
FloatRect boundaries = filterData->boundaries;
context->save();
// Clip drawing of filtered image to the minimum required paint rect.
FilterEffect* lastEffect = filterData->builder->lastEffect();
context->clipRect(lastEffect->determineAbsolutePaintRect(lastEffect->maxEffectRect()));
if (filterElement->hasAttribute(SVGNames::filterResAttr)) {
// Get boundaries in device coords.
// FIXME: See crbug.com/382491. Is the use of getCTM OK here, given it does not include device
// zoom or High DPI adjustments?
FloatSize size = context->getCTM().mapSize(boundaries.size());
// Compute the scale amount required so that the resulting offscreen is exactly filterResX by filterResY pixels.
float filterResScaleX = filterElement->filterResX()->currentValue()->value() / size.width();
float filterResScaleY = filterElement->filterResY()->currentValue()->value() / size.height();
// Scale the CTM so the primitive is drawn to filterRes.
context->scale(filterResScaleX, filterResScaleY);
// Create a resize filter with the inverse scale.
AffineTransform resizeMatrix;
resizeMatrix.scale(1 / filterResScaleX, 1 / filterResScaleY);
imageFilter = builder.buildTransform(resizeMatrix, imageFilter.get());
}
// See crbug.com/382491.
if (!RuntimeEnabledFeatures::slimmingPaintEnabled()) {
// 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 = context->getCTM();
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->setCTM(scaleAndTranslate);
imageFilter = builder.buildTransform(shearAndRotate, imageFilter.get());
}
}
context->beginLayer(1, CompositeSourceOver, &boundaries, ColorFilterNone, imageFilter.get());
context->endLayer();
context->restore();
}
static bool rotationOfCharacterCallback(QueryData* queryData, const SVGTextFragment& fragment)
{
RotationOfCharacterData* data = static_cast<RotationOfCharacterData*>(queryData);
int startPosition = data->position;
int endPosition = startPosition + 1;
if (!mapStartEndPositionsIntoFragmentCoordinates(queryData, fragment, startPosition, endPosition))
return false;
if (!fragment.isTransformed()) {
data->rotation = 0;
} else {
AffineTransform fragmentTransform = fragment.buildFragmentTransform(SVGTextFragment::TransformIgnoringTextLength);
fragmentTransform.scale(1 / fragmentTransform.xScale(), 1 / fragmentTransform.yScale());
data->rotation = narrowPrecisionToFloat(rad2deg(atan2(fragmentTransform.b(), fragmentTransform.a())));
}
return true;
}
SkMatrix affineTransformToSkMatrix(const AffineTransform& source)
{
SkMatrix result;
result.setScaleX(WebCoreDoubleToSkScalar(source.a()));
result.setSkewX(WebCoreDoubleToSkScalar(source.c()));
result.setTranslateX(WebCoreDoubleToSkScalar(source.e()));
result.setScaleY(WebCoreDoubleToSkScalar(source.d()));
result.setSkewY(WebCoreDoubleToSkScalar(source.b()));
result.setTranslateY(WebCoreDoubleToSkScalar(source.f()));
// FIXME: Set perspective properly.
result.setPerspX(0);
result.setPerspY(0);
result.set(SkMatrix::kMPersp2, SK_Scalar1);
return result;
}
bool SVGTextQuery::rotationOfCharacterCallback(Data* queryData, const SVGTextFragment& fragment) const
{
RotationOfCharacterData* data = static_cast<RotationOfCharacterData*>(queryData);
unsigned startPosition = data->position;
unsigned endPosition = startPosition + 1;
if (!mapStartEndPositionsIntoFragmentCoordinates(queryData, fragment, startPosition, endPosition))
return false;
AffineTransform fragmentTransform;
fragment.buildFragmentTransform(fragmentTransform, SVGTextFragment::TransformIgnoringTextLength);
if (fragmentTransform.isIdentity())
data->rotation = 0;
else {
fragmentTransform.scale(1 / fragmentTransform.xScale(), 1 / fragmentTransform.yScale());
data->rotation = narrowPrecisionToFloat(rad2deg(atan2(fragmentTransform.b(), fragmentTransform.a())));
}
return true;
}
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;
}
