public DDSPixelFormat(DDSPixelFormatFlags Flags, DDSPixelFormatFourCC FourCC, uint RGBBitCount, uint BitMaskRed, uint BitMaskGreen, uint BitMaskBlue, uint BitMaskRGBAlpha)
{
this.Size = 0x20;
this.Flags = Flags;
this.FourCC = FourCC;
this.RGBBitCount = RGBBitCount;
this.BitMaskRed = BitMaskRed;
this.BitMaskGreen = BitMaskGreen;
this.BitMaskBlue = BitMaskBlue;
this.BitMaskRGBAlpha = BitMaskRGBAlpha;
}
public DDSPixelFormat(DDSPixelFormatFlags Flags, DDSPixelFormatFourCC FourCC, uint RGBBitCount, uint BitMaskRed, uint BitMaskGreen, uint BitMaskBlue, uint BitMaskRGBAlpha)
{
this.Size = 0x20;
this.Flags = Flags;
this.FourCC = FourCC;
this.RGBBitCount = RGBBitCount;
this.BitMaskRed = BitMaskRed;
this.BitMaskGreen = BitMaskGreen;
this.BitMaskBlue = BitMaskBlue;
this.BitMaskRGBAlpha = BitMaskRGBAlpha;
}
/// <summary>
/// Read the DDS Pixel Format Header
/// </summary>
/// <param name="reader"></param>
/// <returns>Valid header</returns>
public override bool Read(EndianReader reader)
{
reader.Format = EndianFormat.LittleEndian;
var size = reader.ReadInt32();
if (size != Size)
{
return(false);
}
else
{
Flags = (DDSPixelFormatFlags)reader.ReadInt32();
FourCC = reader.ReadUInt32();
RGBBitCount = reader.ReadInt32();
RBitMask = reader.ReadUInt32();
GBitMask = reader.ReadUInt32();
BBitMask = reader.ReadUInt32();
ABitMask = reader.ReadUInt32();
return(true);
}
}
public void SetTextureFormat(BitmapFormat format, BitmapFlags flags)
{
if (flags.HasFlag(BitmapFlags.Compressed))
{
Flags |= DDSPixelFormatFlags.Compressed;
switch (format)
{
case BitmapFormat.Dxt5:
Flags |= DDSPixelFormatFlags.FourCC;
FourCC = 0x35545844;
break;
case BitmapFormat.Dxt3:
Flags |= DDSPixelFormatFlags.FourCC;
FourCC = 0x33545844;
break;
case BitmapFormat.Dxt1:
Flags |= DDSPixelFormatFlags.FourCC;
FourCC = 0x31545844;
break;
case BitmapFormat.Dxn:
Flags |= DDSPixelFormatFlags.FourCC;
FourCC = 0x32495441;
break;
default:
throw new Exception($"Unsupported bitmap format {format}");
}
}
else
{
Flags |= DDSPixelFormatFlags.RGB;
RGBBitCount = BitmapFormatUtils.GetBitsPerPixel(format);
switch (format)
{
case BitmapFormat.A8:
case BitmapFormat.AY8:
ABitMask = 0xFF;
Flags |= DDSPixelFormatFlags.Alpha;
break;
case BitmapFormat.Y8:
RBitMask = 0xFF;
Flags |= DDSPixelFormatFlags.Luminance;
break;
case BitmapFormat.A8Y8:
Flags |= DDSPixelFormatFlags.RGB;
RBitMask = 0x00FF; ABitMask = 0xFF00;
break;
case BitmapFormat.R5G6B5:
Flags |= DDSPixelFormatFlags.RGB;
RBitMask = 0xF800; GBitMask = 0x07E0; BBitMask = 0x001F;
break;
case BitmapFormat.A1R5G5B5:
Flags |= DDSPixelFormatFlags.RGB;
RBitMask = 0x7C00; GBitMask = 0x03E0; BBitMask = 0x001F; ABitMask = 0x8000;
break;
case BitmapFormat.A4R4G4B4:
Flags |= DDSPixelFormatFlags.RGB;
RBitMask = 0xF000; GBitMask = 0x0F00; BBitMask = 0x00F0; ABitMask = 0x000F;
break;
case BitmapFormat.A4R4G4B4Font:
Flags |= DDSPixelFormatFlags.RGB;
RBitMask = 0xF000; GBitMask = 0x0F00; BBitMask = 0x00F0; ABitMask = 0x000F;
break;
case BitmapFormat.A8R8G8B8:
Flags |= DDSPixelFormatFlags.RGB;
RBitMask = 0x00FF0000; GBitMask = 0x0000FF00; BBitMask = 0x000000FF; ABitMask = 0xFF000000;
break;
case BitmapFormat.X8R8G8B8:
Flags |= DDSPixelFormatFlags.RGB;
RBitMask = 0x00FF0000; GBitMask = 0x0000FF00; BBitMask = 0x000000FF;
break;
case BitmapFormat.V8U8:
RBitMask = 0xFF00; GBitMask = 0x00FF;
Flags |= DDSPixelFormatFlags.BumpDUDV;
break;
case BitmapFormat.A32B32G32R32F:
Flags |= DDSPixelFormatFlags.FourCC;
FourCC = 0x74;
break;
case BitmapFormat.A16B16G16R16F:
Flags |= DDSPixelFormatFlags.FourCC;
FourCC = 0x71;
break;
default:
throw new Exception($"Unsupported bitmap format {format}");
}
}
}
