void removeIslands(ofPixels_<T>& img) {
int w = img.getWidth(), h = img.getHeight();
int ia1=-w-1,ia2=-w-0,ia3=-w+1,ib1=-0-1,ib3=-0+1,ic1=+w-1,ic2=+w-0,ic3=+w+1;
T* p = img.getPixels();
for(int y = 1; y + 1 < h; y++) {
for(int x = 1; x + 1 < w; x++) {
int i = y * w + x;
if(p[i]) {
if(!p[i+ia1]&&!p[i+ia2]&&!p[i+ia3]&&!p[i+ib1]&&!p[i+ib3]&&!p[i+ic1]&&!p[i+ic2]&&!p[i+ic3]) {
p[i] = 0;
}
}
}
}
}
bool ofPixels_<PixelType>::pasteInto(ofPixels_<PixelType> &dst, int xTo, int yTo){
if (!(isAllocated()) || !(dst.isAllocated()) || getBytesPerPixel() != dst.getBytesPerPixel() || xTo>=dst.getWidth() || yTo>=dst.getHeight()) return false;
int bytesToCopyPerRow = (xTo + getWidth()<=dst.getWidth() ? getWidth() : dst.getWidth()-xTo) * getBytesPerPixel();
int columnsToCopy = yTo + getHeight() <= dst.getHeight() ? getHeight() : dst.getHeight()-yTo;
PixelType * dstPix = dst.getPixels() + ((xTo + yTo*dst.getWidth())*dst.getBytesPerPixel());
PixelType * srcPix = getPixels();
int srcStride = getWidth()*getBytesPerPixel();
int dstStride = dst.getWidth()*dst.getBytesPerPixel();
for(int y=0;y<columnsToCopy; y++){
memcpy(dstPix,srcPix,bytesToCopyPerRow);
dstPix += dstStride;
srcPix += srcStride;
}
return true;
}
void ofImage_<PixelType>::setFromPixels(const ofPixels_<PixelType> & pixels){
setFromPixels(pixels.getPixels(),pixels.getWidth(),pixels.getHeight(),pixels.getImageType());
}
bool ofPixels_<PixelType>::resizeTo(ofPixels_<PixelType>& dst, ofInterpolationMethod interpMethod){
if (!(isAllocated()) || !(dst.isAllocated()) || getBytesPerPixel() != dst.getBytesPerPixel()) return false;
int srcWidth = getWidth();
int srcHeight = getHeight();
int dstWidth = dst.getWidth();
int dstHeight = dst.getHeight();
int bytesPerPixel = getBytesPerPixel();
PixelType * dstPixels = dst.getPixels();
switch (interpMethod){
//----------------------------------------
case OF_INTERPOLATE_NEAREST_NEIGHBOR:{
int dstIndex = 0;
float srcxFactor = (float)srcWidth/dstWidth;
float srcyFactor = (float)srcHeight/dstHeight;
float srcy = 0.5;
for (int dsty=0; dsty<dstHeight; dsty++){
float srcx = 0.5;
int srcIndex = int(srcy)*srcWidth;
for (int dstx=0; dstx<dstWidth; dstx++){
int pixelIndex = int(srcIndex + srcx) * bytesPerPixel;
for (int k=0; k<bytesPerPixel; k++){
dstPixels[dstIndex] = pixels[pixelIndex];
dstIndex++;
pixelIndex++;
}
srcx+=srcxFactor;
}
srcy+=srcyFactor;
}
}break;
//----------------------------------------
case OF_INTERPOLATE_BILINEAR:
// not implemented yet
ofLogError(" Bilinear resize not implemented ");
break;
//----------------------------------------
case OF_INTERPOLATE_BICUBIC:
float px1, py1;
float px2, py2;
float px3, py3;
float srcColor = 0;
float interpCol;
int patchRow;
int patchIndex;
float patch[16];
int srcRowBytes = srcWidth*bytesPerPixel;
int loIndex = (srcRowBytes)+1;
int hiIndex = (srcWidth*srcHeight*bytesPerPixel)-(srcRowBytes)-1;
for (int dsty=0; dsty<dstHeight; dsty++){
for (int dstx=0; dstx<dstWidth; dstx++){
int dstIndex0 = (dsty*dstWidth + dstx) * bytesPerPixel;
float srcxf = srcWidth * (float)dstx/(float)dstWidth;
float srcyf = srcHeight * (float)dsty/(float)dstHeight;
int srcx = (int) MIN(srcWidth-1, srcxf);
int srcy = (int) MIN(srcHeight-1, srcyf);
int srcIndex0 = (srcy*srcWidth + srcx) * bytesPerPixel;
px1 = srcxf - srcx;
py1 = srcyf - srcy;
px2 = px1 * px1;
px3 = px2 * px1;
py2 = py1 * py1;
py3 = py2 * py1;
for (int k=0; k<bytesPerPixel; k++){
int dstIndex = dstIndex0+k;
int srcIndex = srcIndex0+k;
for (int dy=0; dy<4; dy++) {
patchRow = srcIndex + ((dy-1)*srcRowBytes);
for (int dx=0; dx<4; dx++) {
patchIndex = patchRow + (dx-1)*bytesPerPixel;
if ((patchIndex >= loIndex) && (patchIndex < hiIndex)) {
srcColor = pixels[patchIndex];
}
patch[dx*4 + dy] = srcColor;
}
}
interpCol = (PixelType)bicubicInterpolate(patch, px1,py1, px2,py2, px3,py3);
dstPixels[dstIndex] = interpCol;
}
}
}
break;
}
return true;
}
void ofPixels_<PixelType>::copyFrom(const ofPixels_<PixelType> & mom){
if(mom.isAllocated()) {
allocate(mom.getWidth(), mom.getHeight(), mom.getNumChannels());
memcpy(pixels, mom.getPixels(), mom.getWidth() * mom.getHeight() * mom.getBytesPerPixel());
}
}
void ofPixels_<PixelType>::rotate90To(ofPixels_<PixelType> & dst, int nClockwiseRotations) const{
int channels = channelsFromPixelFormat(pixelFormat);
if (bAllocated == false || channels==0){
return;
}
if(&dst == this){
dst.rotate90(nClockwiseRotations);
return;
}
// first, figure out which type of rotation we have
int rotation = nClockwiseRotations;
while (rotation < 0){
rotation+=4;
}
rotation %= 4;
// if it's 0, just make a copy. if it's 2, do it by a mirror operation.
if (rotation == 0) {
dst = *this;
return;
// do nothing!
} else if (rotation == 2) {
mirrorTo(dst, true, true);
return;
}
// otherwise, we will need to do some new allocaiton.
dst.allocate(height,width,getImageType());
int strideSrc = width * channels;
int strideDst = dst.width * channels;
if(rotation == 1){
PixelType * srcPixels = pixels;
PixelType * startPixels = dst.getPixels() + (strideDst - channels);
for (int i = 0; i < height; ++i, --startPixels){
PixelType * dstPixels = startPixels;
for (int j = 0; j < width; ++j){
for (int k = 0; k < channels; ++k){
dstPixels[k] = srcPixels[k];
}
srcPixels += channels;
dstPixels += strideDst;
}
}
} else if(rotation == 3){
PixelType * dstPixels = dst.pixels;
PixelType * startPixels = pixels + (strideSrc - channels);
for (int i = 0; i < dst.height; ++i, --startPixels){
PixelType * srcPixels = startPixels;
for (int j = 0; j < dst.width; ++j){
for (int k = 0; k < channels; ++k){
dstPixels[k] = srcPixels[k];
}
srcPixels += strideSrc;
dstPixels += channels;
}
}
}
}
void ofPixels_<PixelType>::copyFrom(const ofPixels_<PixelType> & mom){
if(mom.isAllocated()) {
allocate(mom.getWidth(), mom.getHeight(), mom.getPixelFormat());
memcpy(pixels, mom.getPixels(), mom.size() * sizeof(PixelType));
}
}
