void processPixels(byte curr[], int xOffset, int step, int y, int width) {
int srcX, dstX;
int out[] = getPixel(curr);
int sizes = 0;
switch (colorType) {
case 0:
case 3:
case 4:
sizes = 1;
break;
case 2:
case 6:
sizes = 3;
break;
}
if (image != null) {
dstX = xOffset;
int yStride = (sizes * this.width * (bitDepth == 16 ? 8 : bitDepth) + 7) / 8;
for (srcX = 0; srcX < width; srcX++) {
setPixel(image, out, inputBands * srcX, sizes, dstX, y, bitDepth, yStride);
dstX += step;
}
}
if (palShades) {
if ((colorType & 4) != 0) {
if (bitDepth == 16) {
for (int k = 0; k < width; ++k) out[k * inputBands + sizes] >>>= 8;
}
int yStride = this.width;
dstX = xOffset;
for (srcX = 0; srcX < width; srcX++) {
setPixel(smask, out, inputBands * srcX + sizes, 1, dstX, y, 8, yStride);
dstX += step;
}
} else { // colorType 3
int yStride = this.width;
int v[] = new int[1];
dstX = xOffset;
for (srcX = 0; srcX < width; srcX++) {
int idx = out[srcX];
if (idx < trans.length) v[0] = trans[idx];
setPixel(smask, v, 0, 1, dstX, y, 8, yStride);
dstX += step;
}
}
} else if (genBWMask) {
switch (colorType) {
case 3:
{
int yStride = (this.width + 7) / 8;
int v[] = new int[1];
dstX = xOffset;
for (srcX = 0; srcX < width; srcX++) {
int idx = out[srcX];
if (idx < trans.length) v[0] = (trans[idx] == 0 ? 1 : 0);
setPixel(smask, v, 0, 1, dstX, y, 1, yStride);
dstX += step;
}
break;
}
case 0:
{
int yStride = (this.width + 7) / 8;
int v[] = new int[1];
dstX = xOffset;
for (srcX = 0; srcX < width; srcX++) {
int g = out[srcX];
v[0] = (g == transRedGray ? 1 : 0);
setPixel(smask, v, 0, 1, dstX, y, 1, yStride);
dstX += step;
}
break;
}
case 2:
{
int yStride = (this.width + 7) / 8;
int v[] = new int[1];
dstX = xOffset;
for (srcX = 0; srcX < width; srcX++) {
int markRed = inputBands * srcX;
v[0] =
(out[markRed] == transRedGray
&& out[markRed + 1] == transGreen
&& out[markRed + 2] == transBlue
? 1
: 0);
setPixel(smask, v, 0, 1, dstX, y, 1, yStride);
dstX += step;
}
break;
}
}
}
}
