public void ReadScanline(byte[] scanline, Color2[] pixels, PngHeader header)
{
int offset;
byte[] newScanline = GrayscaleReader.ToArrayByBitsLength(scanline, header.BitDepth);
if (useAlpha)
{
for (int x = 0; x < newScanline.Length; x += 4)
{
offset = row * header.Width + (x >> 2);
byte r = newScanline[x];
byte g = newScanline[x + 1];
byte b = newScanline[x + 2];
byte a = newScanline[x + 3];
Color2 color = Color2.FromArgb(a, r, g, b);
pixels[offset] = color;
}
}
else
{
for (int x = 0; x < newScanline.Length / 3; x++)
{
offset = (row * header.Width) + x;
int pixelOffset = x * 3;
byte r = newScanline[pixelOffset];
byte g = newScanline[pixelOffset + 1];
byte b = newScanline[pixelOffset + 2];
Color2 color = Color2.FromArgb(r, g, b);
pixels[offset] = color;
}
}
row++;
}
public void ReadScanline(byte[] scanline, Color2[] pixels, PngHeader header)
{
byte[] newScanline = GrayscaleReader.ToArrayByBitsLength(scanline, header.BitDepth);
int offset, index;
if (paletteAlpha != null && paletteAlpha.Length > 0)
{
for (int i = 0; i < header.Width; i++)
{
index = newScanline[i];
offset = (row * header.Width) + i;
int pixelOffset = index * 3;
byte r = palette[pixelOffset];
byte g = palette[pixelOffset + 1];
byte b = palette[pixelOffset + 2];
byte a = paletteAlpha.Length > index ? paletteAlpha[index] : (byte)255;
Color2 color = Color2.FromArgb(a, r, g, b);
pixels[offset] = color;
}
}
else
{
for (int i = 0; i < header.Width; i++)
{
index = newScanline[i];
offset = (row * header.Width) + i;
int pixelOffset = index * 3;
byte r = palette[pixelOffset];
byte g = palette[pixelOffset + 1];
byte b = palette[pixelOffset + 2];
Color2 color = Color2.FromArgb(r, g, b);
pixels[offset] = color;
}
}
row++;
}