public void CanReadAndWriteData(int depth)
{
using (var pix = Pix.Create(Width, Height, depth))
{
var pixData = pix.GetData();
for (var y = 0; y < Height; y++)
{
var line = (uint *)pixData.Data + (y * pixData.WordsPerLine);
for (var x = 0; x < Width; x++)
{
var val = (uint)((y * Width + x) % (1 << depth));
uint readVal;
if (depth == 1)
{
PixData.SetDataBit(line, x, val);
readVal = PixData.GetDataBit(line, x);
}
else if (depth == 2)
{
PixData.SetDataDIBit(line, x, val);
readVal = PixData.GetDataDIBit(line, x);
}
else if (depth == 4)
{
PixData.SetDataQBit(line, x, val);
readVal = PixData.GetDataQBit(line, x);
}
else if (depth == 8)
{
PixData.SetDataByte(line, x, val);
readVal = PixData.GetDataByte(line, x);
}
else if (depth == 16)
{
PixData.SetDataTwoByte(line, x, val);
readVal = PixData.GetDataTwoByte(line, x);
}
else if (depth == 32)
{
PixData.SetDataFourByte(line, x, val);
readVal = PixData.GetDataFourByte(line, x);
}
else
{
throw new NotSupportedException();
}
Assert.AreEqual(readVal, val);
}
}
}
}
private unsafe PixColor GetPixel(Pix pix, int x, int y)
{
var pixDepth = pix.Depth;
var pixData = pix.GetData();
var pixLine = (uint *)pixData.Data + pixData.WordsPerLine * y;
uint pixValue;
if (pixDepth == 1)
{
pixValue = PixData.GetDataBit(pixLine, x);
}
else if (pixDepth == 4)
{
pixValue = PixData.GetDataQBit(pixLine, x);
}
else if (pixDepth == 8)
{
pixValue = PixData.GetDataByte(pixLine, x);
}
else if (pixDepth == 32)
{
pixValue = PixData.GetDataFourByte(pixLine, x);
}
else
{
throw new ArgumentException(String.Format("Bit depth of {0} is not supported.", pix.Depth), "pix");
}
if (pix.Colormap != null)
{
return(pix.Colormap[(int)pixValue]);
}
else
{
if (pixDepth == 32)
{
return(PixColor.FromRgba(pixValue));
}
else
{
byte grayscale = (byte)(pixValue * 255 / ((1 << 16) - 1));
return(new PixColor(grayscale, grayscale, grayscale));
}
}
}