bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& source, const SkMatrix& ctm,
SkBitmap* dst, SkIPoint* offset) {
SkBitmap src = this->getInputResult(proxy, source, ctm, offset);
if (src.config() != SkBitmap::kARGB_8888_Config) {
return false;
}
SkAutoLockPixels alp(src);
if (!src.getPixels()) {
return false;
}
dst->setConfig(src.config(), src.width(), src.height());
dst->allocPixels();
int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
getBox3Params(fSigma.width(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
getBox3Params(fSigma.height(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);
if (kernelSizeX < 0 || kernelSizeY < 0) {
return false;
}
if (kernelSizeX == 0 && kernelSizeY == 0) {
src.copyTo(dst, dst->config());
return true;
}
SkBitmap temp;
temp.setConfig(dst->config(), dst->width(), dst->height());
if (!temp.allocPixels()) {
return false;
}
if (kernelSizeX > 0 && kernelSizeY > 0) {
boxBlurX(src, &temp, kernelSizeX, lowOffsetX, highOffsetX);
boxBlurY(temp, dst, kernelSizeY, lowOffsetY, highOffsetY);
boxBlurX(*dst, &temp, kernelSizeX, highOffsetX, lowOffsetX);
boxBlurY(temp, dst, kernelSizeY, highOffsetY, lowOffsetY);
boxBlurX(*dst, &temp, kernelSizeX3, highOffsetX, highOffsetX);
boxBlurY(temp, dst, kernelSizeY3, highOffsetY, highOffsetY);
} else if (kernelSizeX > 0) {
boxBlurX(src, dst, kernelSizeX, lowOffsetX, highOffsetX);
boxBlurX(*dst, &temp, kernelSizeX, highOffsetX, lowOffsetX);
boxBlurX(temp, dst, kernelSizeX3, highOffsetX, highOffsetX);
} else if (kernelSizeY > 0) {
boxBlurY(src, dst, kernelSizeY, lowOffsetY, highOffsetY);
boxBlurY(*dst, &temp, kernelSizeY, highOffsetY, lowOffsetY);
boxBlurY(temp, dst, kernelSizeY3, highOffsetY, highOffsetY);
}
return true;
}
bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& source, const SkMatrix& ctm,
SkBitmap* dst, SkIPoint* offset) {
SkBitmap src = source;
if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctm, &src, offset)) {
return false;
}
if (src.config() != SkBitmap::kARGB_8888_Config) {
return false;
}
SkAutoLockPixels alp(src);
if (!src.getPixels()) {
return false;
}
SkIRect srcBounds, dstBounds;
src.getBounds(&srcBounds);
if (!this->applyCropRect(&srcBounds, ctm)) {
return false;
}
dst->setConfig(src.config(), srcBounds.width(), srcBounds.height());
dst->getBounds(&dstBounds);
dst->allocPixels();
int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
getBox3Params(fSigma.width(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
getBox3Params(fSigma.height(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);
if (kernelSizeX < 0 || kernelSizeY < 0) {
return false;
}
if (kernelSizeX == 0 && kernelSizeY == 0) {
src.copyTo(dst, dst->config());
return true;
}
SkBitmap temp;
temp.setConfig(dst->config(), dst->width(), dst->height());
if (!temp.allocPixels()) {
return false;
}
if (kernelSizeX > 0 && kernelSizeY > 0) {
boxBlurX(src, &temp, kernelSizeX, lowOffsetX, highOffsetX, srcBounds);
boxBlurY(temp, dst, kernelSizeY, lowOffsetY, highOffsetY, dstBounds);
boxBlurX(*dst, &temp, kernelSizeX, highOffsetX, lowOffsetX, dstBounds);
boxBlurY(temp, dst, kernelSizeY, highOffsetY, lowOffsetY, dstBounds);
boxBlurX(*dst, &temp, kernelSizeX3, highOffsetX, highOffsetX, dstBounds);
boxBlurY(temp, dst, kernelSizeY3, highOffsetY, highOffsetY, dstBounds);
} else if (kernelSizeX > 0) {
boxBlurX(src, dst, kernelSizeX, lowOffsetX, highOffsetX, srcBounds);
boxBlurX(*dst, &temp, kernelSizeX, highOffsetX, lowOffsetX, dstBounds);
boxBlurX(temp, dst, kernelSizeX3, highOffsetX, highOffsetX, dstBounds);
} else if (kernelSizeY > 0) {
boxBlurY(src, dst, kernelSizeY, lowOffsetY, highOffsetY, srcBounds);
boxBlurY(*dst, &temp, kernelSizeY, highOffsetY, lowOffsetY, dstBounds);
boxBlurY(temp, dst, kernelSizeY3, highOffsetY, highOffsetY, dstBounds);
}
offset->fX += srcBounds.fLeft;
offset->fY += srcBounds.fTop;
return true;
}