| public static FilterPaethPredictor ( int a, int b, int c ) : int | ||
| a | int | |
| b | int | |
| c | int | |
| return | int | |
private void FilterRowPaeth() {
int i, j, imax;
imax = ImgInfo.BytesPerRow;
for (j = 1 - ImgInfo.BytesPixel, i = 1; i <= imax; i++, j++)
rowbfilter[i] = (byte)(rowb[i] - PngHelperInternal.FilterPaethPredictor(j > 0 ? rowb[j] : 0,
rowbprev[i], j > 0 ? rowbprev[j] : 0));
}
private void UnfilterRowPaeth(int nbytes)
{
int i, j, x, y;
for (j = 1 - ImgInfo.BytesPixel, i = 1; i <= nbytes; i++, j++)
{
x = (j > 0) ? rowb[j] : 0;
y = (j > 0) ? rowbprev[j] : 0;
rowb[i] = (byte)(rowbfilter[i] + PngHelperInternal.FilterPaethPredictor(x, rowbprev[i], y));
}
}
public void FilterRowPaeth()
{
int bytesPerRow = ImgInfo.BytesPerRow;
int num = 1 - ImgInfo.BytesPixel;
int num2 = 1;
while (num2 <= bytesPerRow)
{
rowbfilter[num2] = (byte)(rowb[num2] - PngHelperInternal.FilterPaethPredictor((num > 0) ? rowb[num] : 0, rowbprev[num2], (num > 0) ? rowbprev[num] : 0));
num2++;
num++;
}
}
public void UnfilterRowPaeth(int nbytes)
{
int num = 1 - ImgInfo.BytesPixel;
int num2 = 1;
while (num2 <= nbytes)
{
int a = (num > 0) ? rowb[num] : 0;
int c = (num > 0) ? rowbprev[num] : 0;
rowb[num2] = (byte)(rowbfilter[num2] + PngHelperInternal.FilterPaethPredictor(a, rowbprev[num2], c));
num2++;
num++;
}
}
