This source file includes following definitions.
- outsetSizeForBlur
- canInterpolateWith
- hasReferenceFilter
- hasOutsets
- outsets
- hasFilterThatAffectsOpacity
- hasFilterThatMovesPixels
#include "config.h"
#include "platform/graphics/filters/FilterOperations.h"
#include "platform/LengthFunctions.h"
#include "platform/geometry/IntSize.h"
#include "platform/graphics/filters/FEGaussianBlur.h"
namespace WebCore {
static inline IntSize outsetSizeForBlur(float stdDeviation)
{
IntSize kernelSize = FEGaussianBlur::calculateUnscaledKernelSize(FloatPoint(stdDeviation, stdDeviation));
IntSize outset;
outset.setWidth(3 * kernelSize.width() * 0.5f);
outset.setHeight(3 * kernelSize.height() * 0.5f);
return outset;
}
FilterOperations::FilterOperations()
{
}
FilterOperations& FilterOperations::operator=(const FilterOperations& other)
{
m_operations = other.m_operations;
return *this;
}
bool FilterOperations::operator==(const FilterOperations& o) const
{
if (m_operations.size() != o.m_operations.size())
return false;
unsigned s = m_operations.size();
for (unsigned i = 0; i < s; i++) {
if (*m_operations[i] != *o.m_operations[i])
return false;
}
return true;
}
bool FilterOperations::canInterpolateWith(const FilterOperations& other) const
{
for (size_t i = 0; i < operations().size(); ++i) {
if (!FilterOperation::canInterpolate(operations()[i]->type()))
return false;
}
for (size_t i = 0; i < other.operations().size(); ++i) {
if (!FilterOperation::canInterpolate(other.operations()[i]->type()))
return false;
}
size_t commonSize = std::min(operations().size(), other.operations().size());
for (size_t i = 0; i < commonSize; ++i) {
if (!operations()[i]->isSameType(*other.operations()[i]))
return false;
}
return true;
}
bool FilterOperations::hasReferenceFilter() const
{
for (size_t i = 0; i < m_operations.size(); ++i) {
if (m_operations.at(i)->type() == FilterOperation::REFERENCE)
return true;
}
return false;
}
bool FilterOperations::hasOutsets() const
{
for (size_t i = 0; i < m_operations.size(); ++i) {
FilterOperation::OperationType operationType = m_operations.at(i)->type();
if (operationType == FilterOperation::BLUR || operationType == FilterOperation::DROP_SHADOW || operationType == FilterOperation::REFERENCE)
return true;
}
return false;
}
FilterOutsets FilterOperations::outsets() const
{
FilterOutsets totalOutsets;
for (size_t i = 0; i < m_operations.size(); ++i) {
FilterOperation* filterOperation = m_operations.at(i).get();
switch (filterOperation->type()) {
case FilterOperation::BLUR: {
BlurFilterOperation* blurOperation = toBlurFilterOperation(filterOperation);
float stdDeviation = floatValueForLength(blurOperation->stdDeviation(), 0);
IntSize outsetSize = outsetSizeForBlur(stdDeviation);
FilterOutsets outsets(outsetSize.height(), outsetSize.width(), outsetSize.height(), outsetSize.width());
totalOutsets += outsets;
break;
}
case FilterOperation::DROP_SHADOW: {
DropShadowFilterOperation* dropShadowOperation = toDropShadowFilterOperation(filterOperation);
IntSize outsetSize = outsetSizeForBlur(dropShadowOperation->stdDeviation());
FilterOutsets 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: {
ReferenceFilterOperation* referenceOperation = toReferenceFilterOperation(filterOperation);
if (referenceOperation->filter() && referenceOperation->filter()->lastEffect()) {
FloatRect outsetRect(0, 0, 1, 1);
outsetRect = referenceOperation->filter()->lastEffect()->mapRectRecursive(outsetRect);
FilterOutsets outsets(
std::max(0.0f, -outsetRect.y()),
std::max(0.0f, outsetRect.x() + outsetRect.width() - 1),
std::max(0.0f, outsetRect.y() + outsetRect.height() - 1),
std::max(0.0f, -outsetRect.x())
);
totalOutsets += outsets;
}
break;
}
case FilterOperation::CUSTOM:
case FilterOperation::VALIDATED_CUSTOM: {
break;
}
default:
break;
}
}
return totalOutsets;
}
bool FilterOperations::hasFilterThatAffectsOpacity() const
{
for (size_t i = 0; i < m_operations.size(); ++i)
if (m_operations[i]->affectsOpacity())
return true;
return false;
}
bool FilterOperations::hasFilterThatMovesPixels() const
{
for (size_t i = 0; i < m_operations.size(); ++i)
if (m_operations[i]->movesPixels())
return true;
return false;
}
}