FilterOperations.cpp [plain text]
#include "config.h"
#include "FilterOperations.h"
#include "FEGaussianBlur.h"
#include "IntSize.h"
#include "LengthFunctions.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
bool FilterOperations::operator==(const FilterOperations& other) const
{
size_t size = m_operations.size();
if (size != other.m_operations.size())
return false;
for (size_t i = 0; i < size; i++) {
if (*m_operations[i] != *other.m_operations[i])
return false;
}
return true;
}
bool FilterOperations::operationsMatch(const FilterOperations& other) const
{
size_t size = operations().size();
if (size != other.operations().size())
return false;
for (size_t i = 0; i < size; ++i) {
if (!operations()[i]->isSameType(*other.operations()[i]))
return false;
}
return true;
}
bool FilterOperations::hasReferenceFilter() const
{
for (auto& operation : m_operations) {
if (operation->type() == FilterOperation::REFERENCE)
return true;
}
return false;
}
IntOutsets FilterOperations::outsets() const
{
IntOutsets totalOutsets;
for (auto& operation : m_operations) {
switch (operation->type()) {
case FilterOperation::BLUR: {
auto& blurOperation = downcast<BlurFilterOperation>(*operation);
float stdDeviation = floatValueForLength(blurOperation.stdDeviation(), 0);
IntSize outsetSize = FEGaussianBlur::calculateOutsetSize({ stdDeviation, stdDeviation });
IntOutsets outsets(outsetSize.height(), outsetSize.width(), outsetSize.height(), outsetSize.width());
totalOutsets += outsets;
break;
}
case FilterOperation::DROP_SHADOW: {
auto& dropShadowOperation = downcast<DropShadowFilterOperation>(*operation);
float stdDeviation = dropShadowOperation.stdDeviation();
IntSize outsetSize = FEGaussianBlur::calculateOutsetSize({ stdDeviation, stdDeviation });
IntOutsets outsets {
std::max(0, outsetSize.height() - dropShadowOperation.y()),
std::max(0, outsetSize.width() + dropShadowOperation.x()),
std::max(0, outsetSize.height() + dropShadowOperation.y()),
std::max(0, outsetSize.width() - dropShadowOperation.x())
};
totalOutsets += outsets;
break;
}
case FilterOperation::REFERENCE:
ASSERT_NOT_REACHED();
break;
default:
break;
}
}
return totalOutsets;
}
bool FilterOperations::transformColor(Color& color) const
{
if (isEmpty() || !color.isValid())
return false;
if (color.isSemantic())
return false;
auto sRGBAColor = color.toSRGBALossy<float>();
for (auto& operation : m_operations) {
if (!operation->transformColor(sRGBAColor))
return false;
}
color = convertToComponentBytes(sRGBAColor);
return true;
}
bool FilterOperations::inverseTransformColor(Color& color) const
{
if (isEmpty() || !color.isValid())
return false;
if (color.isSemantic())
return false;
auto sRGBAColor = color.toSRGBALossy<float>();
for (auto& operation : m_operations) {
if (!operation->inverseTransformColor(sRGBAColor))
return false;
}
color = convertToComponentBytes(sRGBAColor);
return true;
}
bool FilterOperations::hasFilterThatAffectsOpacity() const
{
for (auto& operation : m_operations) {
if (operation->affectsOpacity())
return true;
}
return false;
}
bool FilterOperations::hasFilterThatMovesPixels() const
{
for (auto& operation : m_operations) {
if (operation->movesPixels())
return true;
}
return false;
}
bool FilterOperations::hasFilterThatShouldBeRestrictedBySecurityOrigin() const
{
for (auto& operation : m_operations) {
if (operation->shouldBeRestrictedBySecurityOrigin())
return true;
}
return false;
}
TextStream& operator<<(TextStream& ts, const FilterOperations& filters)
{
for (size_t i = 0; i < filters.size(); ++i) {
auto filter = filters.at(i);
if (filter)
ts << *filter;
else
ts << "(null)";
if (i < filters.size() - 1)
ts << " ";
}
return ts;
}
}