void ofPixels_<PixelType>::cropTo(ofPixels_<PixelType> &toPix, int x, int y, int _width, int _height) const{
if (bAllocated){
if(&toPix == this){
toPix.crop(x,y,_width,_height);
return;
}
_width = ofClamp(_width,1,getWidth());
_height = ofClamp(_height,1,getHeight());
if ((toPix.width != _width) || (toPix.height != _height) || (toPix.pixelFormat != pixelFormat)){
toPix.allocate(_width, _height, pixelFormat);
}
// this prevents having to do a check for bounds in the for loop;
int minX = MAX(x, 0) * getNumChannels();
int maxX = MIN(x+_width, width) * getNumChannels();
int minY = MAX(y, 0);
int maxY = MIN(y+_height, height);
iterator newPixel = toPix.begin();
for(ConstLine line = getConstLines().begin()+minY; line!=getConstLines().begin()+maxY; ++line ){
for(const_iterator pixel = line.begin()+minX; pixel<line.begin()+maxX; ++pixel){
*newPixel++ = *pixel;
}
}
}
}
void ofPixels_<PixelType>::cropTo(ofPixels_<PixelType> &toPix, int x, int y, int _width, int _height) const{
if (bAllocated){
if(&toPix == this){
toPix.crop(x,y,_width,_height);
return;
}
_width = ofClamp(_width,1,getWidth());
_height = ofClamp(_height,1,getHeight());
if ((toPix.width != _width) || (toPix.height != _height) || (toPix.pixelFormat != pixelFormat)){
toPix.allocate(_width, _height, pixelFormat);
}
// this prevents having to do a check for bounds in the for loop;
int minX = MAX(x, 0);
int maxX = MIN(x+_width, width);
int minY = MAX(y, 0);
int maxY = MIN(y+_height, height);
auto newPixel = toPix.getPixelsIter().begin();
for(auto line: getConstLines(minY, maxY - minY)){
for(auto pixel: line.getPixels(minX, maxX - minX)){
newPixel++ = pixel;
}
}
}
}
bool ofPixels_<PixelType>::blendInto(ofPixels_<PixelType> &dst, int xTo, int yTo) const{
if (!(isAllocated()) || !(dst.isAllocated()) || getBytesPerPixel() != dst.getBytesPerPixel() || xTo + getWidth()>dst.getWidth() || yTo + getHeight()>dst.getHeight() || getNumChannels()==0) return false;
std::function<void(const ConstPixel&,Pixel&)> blendFunc;
switch(getNumChannels()){
case 1:
blendFunc = [](const ConstPixel&src, Pixel&dst){
dst[0] = clampedAdd(src[0], dst[0]);
};
break;
case 2:
blendFunc = [](const ConstPixel&src, Pixel&dst){
dst[0] = clampedAdd(src[0], dst[0] / ofColor_<PixelType>::limit() * (ofColor_<PixelType>::limit() - src[1]));
dst[1] = clampedAdd(src[1], dst[1] / ofColor_<PixelType>::limit() * (ofColor_<PixelType>::limit() - src[1]));
};
break;
case 3:
blendFunc = [](const ConstPixel&src, Pixel&dst){
dst[0] = clampedAdd(src[0], dst[0]);
dst[1] = clampedAdd(src[1], dst[1]);
dst[2] = clampedAdd(src[2], dst[2]);
};
break;
case 4:
blendFunc = [](const ConstPixel&src, Pixel&dst){
dst[0] = clampedAdd(src[0], dst[0] / ofColor_<PixelType>::limit() * (ofColor_<PixelType>::limit() - src[3]));
dst[1] = clampedAdd(src[1], dst[1] / ofColor_<PixelType>::limit() * (ofColor_<PixelType>::limit() - src[3]));
dst[2] = clampedAdd(src[2], dst[2] / ofColor_<PixelType>::limit() * (ofColor_<PixelType>::limit() - src[3]));
dst[3] = clampedAdd(src[3], dst[3] / ofColor_<PixelType>::limit() * (ofColor_<PixelType>::limit() - src[3]));
};
break;
}
auto dstLine = dst.getLine(yTo);
for(auto line: getConstLines()){
auto dstPixel = dstLine.getPixels().begin() + xTo;
for(auto p: line.getPixels()){
blendFunc(p,dstPixel);
dstPixel++;
}
dstLine++;
}
return true;
}
void ofPixels_<PixelType>::mirrorTo(ofPixels_<PixelType> & dst, bool vertically, bool horizontal) const{
if(&dst == this){
dst.mirror(vertically,horizontal);
return;
}
if (!vertically && !horizontal){
dst = *this;
return;
}
int bytesPerPixel = getNumChannels();
dst.allocate(width, height, getPixelFormat());
if(vertically && !horizontal){
auto dstLines = dst.getLines();
auto lineSrc = getConstLines().begin();
auto line = --dstLines.end();
auto stride = line.getStride();
for(; line>=dstLines.begin(); --line, ++lineSrc){
memcpy(line.begin(), lineSrc.begin(), stride);
}
}else if (!vertically && horizontal){
int wToDo = width/2;
int hToDo = height;
for (int i = 0; i < wToDo; i++){
for (int j = 0; j < hToDo; j++){
int pixelb = i;
int pixela = j*width + i;
for (int k = 0; k < bytesPerPixel; k++){
dst[pixela*bytesPerPixel + k] = pixels[pixelb*bytesPerPixel + k];
dst[pixelb*bytesPerPixel + k] = pixels[pixela*bytesPerPixel + k];
}
}
}
} else {
// I couldn't think of a good way to do this in place. I'm sure there is.
mirrorTo(dst,true, false);
dst.mirror(false, true);
}
}
