void FEBlend::platformApplySoftware()
{
FilterEffect* in = inputEffect(0);
FilterEffect* in2 = inputEffect(1);
ASSERT(m_mode > FEBLEND_MODE_UNKNOWN);
ASSERT(m_mode <= FEBLEND_MODE_LIGHTEN);
Uint8ClampedArray* dstPixelArray = createPremultipliedImageResult();
if (!dstPixelArray)
return;
IntRect effectADrawingRect = requestedRegionOfInputImageData(in->absolutePaintRect());
RefPtr<Uint8ClampedArray> srcPixelArrayA = in->asPremultipliedImage(effectADrawingRect);
IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePaintRect());
RefPtr<Uint8ClampedArray> srcPixelArrayB = in2->asPremultipliedImage(effectBDrawingRect);
unsigned pixelArrayLength = srcPixelArrayA->length();
ASSERT(pixelArrayLength == srcPixelArrayB->length());
for (unsigned pixelOffset = 0; pixelOffset < pixelArrayLength; pixelOffset += 4) {
unsigned char alphaA = srcPixelArrayA->item(pixelOffset + 3);
unsigned char alphaB = srcPixelArrayB->item(pixelOffset + 3);
for (unsigned channel = 0; channel < 3; ++channel) {
unsigned char colorA = srcPixelArrayA->item(pixelOffset + channel);
unsigned char colorB = srcPixelArrayB->item(pixelOffset + channel);
unsigned char result;
switch (m_mode) {
case FEBLEND_MODE_NORMAL:
result = normal(colorA, colorB, alphaA, alphaB);
break;
case FEBLEND_MODE_MULTIPLY:
result = multiply(colorA, colorB, alphaA, alphaB);
break;
case FEBLEND_MODE_SCREEN:
result = screen(colorA, colorB, alphaA, alphaB);
break;
case FEBLEND_MODE_DARKEN:
result = darken(colorA, colorB, alphaA, alphaB);
break;
case FEBLEND_MODE_LIGHTEN:
result = lighten(colorA, colorB, alphaA, alphaB);
break;
case FEBLEND_MODE_UNKNOWN:
default:
result = 0;
break;
}
dstPixelArray->set(pixelOffset + channel, result);
}
unsigned char alphaR = 255 - ((255 - alphaA) * (255 - alphaB)) / 255;
dstPixelArray->set(pixelOffset + 3, alphaR);
}
}
void FEDisplacementMap::applySoftware()
{
FilterEffect* in = inputEffect(0);
FilterEffect* in2 = inputEffect(1);
ASSERT(m_xChannelSelector != CHANNEL_UNKNOWN);
ASSERT(m_yChannelSelector != CHANNEL_UNKNOWN);
Uint8ClampedArray* dstPixelArray = createPremultipliedImageResult();
if (!dstPixelArray)
return;
IntRect effectADrawingRect = requestedRegionOfInputImageData(in->absolutePaintRect());
RefPtr<Uint8ClampedArray> srcPixelArrayA = in->asPremultipliedImage(effectADrawingRect);
IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePaintRect());
RefPtr<Uint8ClampedArray> srcPixelArrayB = in2->asUnmultipliedImage(effectBDrawingRect);
ASSERT(srcPixelArrayA->length() == srcPixelArrayB->length());
Filter* filter = this->filter();
IntSize paintSize = absolutePaintRect().size();
float scaleX = filter->applyHorizontalScale(m_scale);
float scaleY = filter->applyVerticalScale(m_scale);
float scaleForColorX = scaleX / 255.0;
float scaleForColorY = scaleY / 255.0;
float scaledOffsetX = 0.5 - scaleX * 0.5;
float scaledOffsetY = 0.5 - scaleY * 0.5;
int stride = paintSize.width() * 4;
for (int y = 0; y < paintSize.height(); ++y) {
int line = y * stride;
for (int x = 0; x < paintSize.width(); ++x) {
int dstIndex = line + x * 4;
int srcX = x + static_cast<int>(scaleForColorX * srcPixelArrayB->item(dstIndex + m_xChannelSelector - 1) + scaledOffsetX);
int srcY = y + static_cast<int>(scaleForColorY * srcPixelArrayB->item(dstIndex + m_yChannelSelector - 1) + scaledOffsetY);
for (unsigned channel = 0; channel < 4; ++channel) {
if (srcX < 0 || srcX >= paintSize.width() || srcY < 0 || srcY >= paintSize.height()) {
dstPixelArray->set(dstIndex + channel, static_cast<unsigned char>(0));
} else {
unsigned char pixelValue = srcPixelArrayA->item(srcY * stride + srcX * 4 + channel);
dstPixelArray->set(dstIndex + channel, pixelValue);
}
}
}
}
}
void FEMorphology::platformApplyGeneric(PaintingData* paintingData, int yStart, int yEnd)
{
Uint8ClampedArray* srcPixelArray = paintingData->srcPixelArray;
Uint8ClampedArray* dstPixelArray = paintingData->dstPixelArray;
const int width = paintingData->width;
const int height = paintingData->height;
const int effectWidth = width * 4;
const int radiusX = paintingData->radiusX;
const int radiusY = paintingData->radiusY;
Vector<unsigned char> extrema;
for (int y = yStart; y < yEnd; ++y) {
int extremaStartY = std::max(0, y - radiusY);
int extremaEndY = std::min(height - 1, y + radiusY);
for (unsigned int clrChannel = 0; clrChannel < 4; ++clrChannel) {
extrema.clear();
// Compute extremas for each columns
for (int x = 0; x <= radiusX; ++x) {
unsigned char columnExtrema = srcPixelArray->item(extremaStartY * effectWidth + 4 * x + clrChannel);
for (int eY = extremaStartY + 1; eY < extremaEndY; ++eY) {
unsigned char pixel = srcPixelArray->item(eY * effectWidth + 4 * x + clrChannel);
if ((m_type == FEMORPHOLOGY_OPERATOR_ERODE && pixel <= columnExtrema)
|| (m_type == FEMORPHOLOGY_OPERATOR_DILATE && pixel >= columnExtrema)) {
columnExtrema = pixel;
}
}
extrema.append(columnExtrema);
}
// Kernel is filled, get extrema of next column
for (int x = 0; x < width; ++x) {
const int endX = std::min(x + radiusX, width - 1);
unsigned char columnExtrema = srcPixelArray->item(extremaStartY * effectWidth + endX * 4 + clrChannel);
for (int i = extremaStartY + 1; i <= extremaEndY; ++i) {
unsigned char pixel = srcPixelArray->item(i * effectWidth + endX * 4 + clrChannel);
if ((m_type == FEMORPHOLOGY_OPERATOR_ERODE && pixel <= columnExtrema)
|| (m_type == FEMORPHOLOGY_OPERATOR_DILATE && pixel >= columnExtrema))
columnExtrema = pixel;
}
if (x - radiusX >= 0)
extrema.remove(0);
if (x + radiusX <= width)
extrema.append(columnExtrema);
unsigned char entireExtrema = extrema[0];
for (unsigned kernelIndex = 1; kernelIndex < extrema.size(); ++kernelIndex) {
if ((m_type == FEMORPHOLOGY_OPERATOR_ERODE && extrema[kernelIndex] <= entireExtrema)
|| (m_type == FEMORPHOLOGY_OPERATOR_DILATE && extrema[kernelIndex] >= entireExtrema))
entireExtrema = extrema[kernelIndex];
}
dstPixelArray->set(y * effectWidth + 4 * x + clrChannel, entireExtrema);
}
}
}
}
void FEMorphology::platformApplyGeneric(PaintingData* paintingData, int yStart, int yEnd)
{
Uint8ClampedArray* srcPixelArray = paintingData->srcPixelArray;
Uint8ClampedArray* dstPixelArray = paintingData->dstPixelArray;
const int radiusX = paintingData->radiusX;
const int radiusY = paintingData->radiusY;
const int width = paintingData->width;
const int height = paintingData->height;
ASSERT(radiusX <= width || radiusY <= height);
ASSERT(yStart >= 0 && yEnd <= height && yStart < yEnd);
Vector<unsigned char> extrema;
for (int y = yStart; y < yEnd; ++y) {
int yStartExtrema = std::max(0, y - radiusY);
int yEndExtrema = std::min(height - 1, y + radiusY);
for (unsigned colorChannel = 0; colorChannel < 4; ++colorChannel) {
extrema.clear();
// Compute extremas for each columns
for (int x = 0; x < radiusX; ++x)
extrema.append(columnExtremum(srcPixelArray, x, yStartExtrema, yEndExtrema, width, colorChannel, m_type));
// Kernel is filled, get extrema of next column
for (int x = 0; x < width; ++x) {
if (x < width - radiusX) {
int xEnd = std::min(x + radiusX, width - 1);
extrema.append(columnExtremum(srcPixelArray, xEnd, yStartExtrema, yEndExtrema + 1, width, colorChannel, m_type));
}
if (x > radiusX)
extrema.remove(0);
// The extrema original size = radiusX.
// Number of new addition = width - radiusX.
// Number of removals = width - radiusX - 1.
ASSERT(extrema.size() >= static_cast<size_t>(radiusX + 1));
dstPixelArray->set(pixelArrayIndex(x, y, width, colorChannel), kernelExtremum(extrema, m_type));
}
}
}
}
void FEComponentTransfer::platformApplySoftware()
{
FilterEffect* in = inputEffect(0);
Uint8ClampedArray* pixelArray = createUnmultipliedImageResult();
if (!pixelArray)
return;
unsigned char rValues[256], gValues[256], bValues[256], aValues[256];
getValues(rValues, gValues, bValues, aValues);
unsigned char* tables[] = { rValues, gValues, bValues, aValues };
IntRect drawingRect = requestedRegionOfInputImageData(in->absolutePaintRect());
in->copyUnmultipliedImage(pixelArray, drawingRect);
unsigned pixelArrayLength = pixelArray->length();
for (unsigned pixelOffset = 0; pixelOffset < pixelArrayLength; pixelOffset += 4) {
for (unsigned channel = 0; channel < 4; ++channel) {
unsigned char c = pixelArray->item(pixelOffset + channel);
pixelArray->set(pixelOffset + channel, tables[channel][c]);
}
}
}