private void OnSelectedValueChanged(object sender, EventArgs e)
{
var ddsMipMapInfo = (DdsMipMapInfo)_listBox.SelectedValue;
var width = Texture.CalculateMipMapSize(ddsMipMapInfo.Level, (int)_ddsFile.Header.Width);
var height = Texture.CalculateMipMapSize(ddsMipMapInfo.Level, (int)_ddsFile.Header.Height);
byte[] unpackedData;
switch (_ddsFile.PixelFormat)
{
case LowLevel.Graphics3D.PixelFormat.Bc1:
case LowLevel.Graphics3D.PixelFormat.Bc2:
case LowLevel.Graphics3D.PixelFormat.Bc3:
unpackedData = BlockCompressionUtility.Decompress(
_ddsFile.PixelFormat,
ddsMipMapInfo.MipMap.Data,
(int)ddsMipMapInfo.MipMap.RowPitch,
out _);
width = Math.Max(width, 4);
height = Math.Max(height, 4);
break;
case LowLevel.Graphics3D.PixelFormat.Rg8SNorm:
unpackedData = new byte[width * height * 4];
var unpackedDataIndex = 0;
for (var i = 0; i < ddsMipMapInfo.MipMap.Data.Length; i += 2)
{
unpackedData[unpackedDataIndex++] = ddsMipMapInfo.MipMap.Data[i + 0];
unpackedData[unpackedDataIndex++] = ddsMipMapInfo.MipMap.Data[i + 1];
unpackedData[unpackedDataIndex++] = 0;
unpackedData[unpackedDataIndex++] = 255;
}
break;
default:
throw new NotSupportedException();
}
var bmpData = PngUtility.ConvertToPng(
unpackedData,
width,
height);
Panel2 = new ImageView
{
Style = "nearest-neighbor",
Image = new Bitmap(bmpData)
};
}
private void SetData(int level, byte[] data, int bytesPerRow)
{
var processedData = data;
var processedBytesPerRow = bytesPerRow;
// TODO: Don't do this for Mac.
switch (_originalPixelFormat)
{
case PixelFormat.Bc1:
case PixelFormat.Bc2:
case PixelFormat.Bc3:
processedData = BlockCompressionUtility.Decompress(
_originalPixelFormat,
data,
bytesPerRow,
out processedBytesPerRow);
break;
}
// TODO: This isn't correct for mip levels > 0.
var region = MTLRegion.Create2D(0, 0, DeviceTexture.Width, DeviceTexture.Height);
var pinnedArray = GCHandle.Alloc(processedData, GCHandleType.Pinned);
try
{
var dataPointer = pinnedArray.AddrOfPinnedObject();
DeviceTexture.ReplaceRegion(
region,
(uint)level,
dataPointer,
(uint)processedBytesPerRow);
}
finally
{
pinnedArray.Free();
}
}