/// <summary>
/// Constructor to create an empty image of size and format.
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="format"></param>
public DFManualImage(int width, int height, DFBitmap.Formats format)
{
// Create bitmap object
manualBitmap = new DFBitmap();
manualBitmap.Width = width;
manualBitmap.Height = height;
manualBitmap.Format = format;
// Set stride (1 byte per pixel for indexed, 4 bytes per pixel for all other formats)
switch (format)
{
case DFBitmap.Formats.Indexed:
manualBitmap.Stride = width;
break;
default:
manualBitmap.Stride = width * 4;
break;
}
// Create bitmap data
manualBitmap.Data = new byte[manualBitmap.Stride * height];
}
/// <summary>
/// Get raw bytes for specified record and frame using a custom pixel format.
/// </summary>
/// <param name="record">Index of record.</param>
/// <param name="frame">Index of frame.</param>
/// <param name="alphaIndex">Index of alpha colour.</param>
/// <param name="format">Specified pixel format to use.</param>
/// <returns>DFBitmap object.</returns>
public DFBitmap GetBitmapFormat(int record, int frame, byte alphaIndex, DFBitmap.Formats format)
{
// Get as indexed image
if (format == DFBitmap.Formats.Indexed)
{
return(GetDFBitmap(record, frame));
}
// Create new bitmap
const int formatWidth = 4;
DFBitmap srcBitmap = GetDFBitmap(record, frame);
DFBitmap dstBitmap = new DFBitmap();
dstBitmap.Format = format;
dstBitmap.Width = srcBitmap.Width;
dstBitmap.Height = srcBitmap.Height;
dstBitmap.Stride = dstBitmap.Width * formatWidth;
dstBitmap.Data = new byte[dstBitmap.Stride * dstBitmap.Height];
// Write pixel data to array
byte a, r, g, b;
int srcPos = 0, dstPos = 0;
for (int i = 0; i < dstBitmap.Width * dstBitmap.Height; i++)
{
// Write colour values
byte index = srcBitmap.Data[srcPos++];
if (index != alphaIndex)
{
// Get colour values
a = 0xff;
r = myPalette.GetRed(index);
g = myPalette.GetGreen(index);
b = myPalette.GetBlue(index);
// Write colour values
switch (format)
{
case DFBitmap.Formats.BGRA:
dstBitmap.Data[dstPos++] = b;
dstBitmap.Data[dstPos++] = g;
dstBitmap.Data[dstPos++] = r;
dstBitmap.Data[dstPos++] = a;
break;
case DFBitmap.Formats.ABGR:
dstBitmap.Data[dstPos++] = a;
dstBitmap.Data[dstPos++] = b;
dstBitmap.Data[dstPos++] = g;
dstBitmap.Data[dstPos++] = r;
break;
case DFBitmap.Formats.RGBA:
dstBitmap.Data[dstPos++] = r;
dstBitmap.Data[dstPos++] = g;
dstBitmap.Data[dstPos++] = b;
dstBitmap.Data[dstPos++] = a;
break;
case DFBitmap.Formats.ARGB:
dstBitmap.Data[dstPos++] = a;
dstBitmap.Data[dstPos++] = r;
dstBitmap.Data[dstPos++] = g;
dstBitmap.Data[dstPos++] = b;
break;
default:
throw new Exception("Unknown output format.");
}
}
else
{
// Step over alpha pixels
dstPos += formatWidth;
}
}
return(dstBitmap);
}
