Support for additional PixelFormats in RawImage.ToImage

[camalot]

Original Bug on CodePlex

In RawImage.ToImage (RawImage.cs:257), two pixel formats are hard coded. If the screen buffer is 32-bit, ARGB is always assumed; if the screen buffer is 16-bit, RGB565 is always assumed.

The Microsoft Visual Studio Android emulator uses a RGB format, so the colors are off.

The following code reads the ARGB offsets and determines the pixel format based on these values:

if(this.Bpp == 32) {
    if(this.Alpha.Offset == 0 && this.Red.Offset == 8 && this.Green.Offset == 16 && this.Blue.Offset == 24) {
        format = PixelFormat.Format32bppArgb;
    } else if(this.Red.Offset == 0 && this.Green.Offset == 8 && this.Blue.Offset == 16 && this.Alpha.Offset == 24) {
        format = PixelFormat.Format32bppRgb;
    }
} else if(this.Bpp == 16) {
    if (this.Red.Offset == 0 && Green.Offset == 5 && Red.Offset == 11) {
        format = PixelFormat.Format16bppRgb565;
    } else if(this.Red.Offset == 0 && Green.Offset == 5 && Red.Offset == 10) {
        format = PixelFormat.Format16bppRgb555;
    }
}

return ToImage ( format );