public PixColor this[int index]
{
get
{
int color;
if (Interop.LeptonicaApi.Native.pixcmapGetColor32(handle, index, out color) == 0)
{
return(PixColor.FromRgb((uint)color));
}
else
{
throw new InvalidOperationException("Failed to retrieve color.");
}
}
set
{
if (Interop.LeptonicaApi.Native.pixcmapResetColor(handle, index, value.Red, value.Green, value.Blue) != 0)
{
throw new InvalidOperationException("Failed to reset color.");
}
}
}
private unsafe void TransferData32(PixData pixData, BitmapData imgData, int alphaMask)
{
var imgFormat = imgData.PixelFormat;
var height = imgData.Height;
var width = imgData.Width;
for (int y = 0; y < height; y++)
{
byte *imgLine = (byte *)imgData.Scan0 + (y * imgData.Stride);
uint *pixLine = (uint *)pixData.Data + (y * pixData.WordsPerLine);
for (int x = 0; x < width; x++)
{
var pixVal = PixColor.FromRgba(pixLine[x]);
byte *pixelPtr = imgLine + (x << 2);
pixelPtr[0] = pixVal.Blue;
pixelPtr[1] = pixVal.Green;
pixelPtr[2] = pixVal.Red;
pixelPtr[3] = (byte)(alphaMask | pixVal.Alpha); // Allow user to include alpha or not
}
}
}
public bool AddColor(PixColor color)
{
return(Interop.LeptonicaApi.Native.pixcmapAddColor(handle, color.Red, color.Green, color.Blue) == 0);
}
public bool AddNearestColor(PixColor color, out int index)
{
return(Interop.LeptonicaApi.Native.pixcmapAddNearestColor(handle, color.Red, color.Green, color.Blue, out index) == 0);
}