public static DxTexture LoadFromStream(GtexData gtex, Stream input)
{
if (gtex.Header.LayerCount == 0)
return null;
return gtex.Header.IsCubeMap
? ReadTextureCubeFromStream(gtex, input)
: Read2DTextureFromStream(gtex, input);
}
public override void ReadFromStream(Stream input)
{
base.ReadFromStream(input);
TextureHeader = input.ReadContent <TextureHeader>();
Gtex = input.ReadContent <GtexData>();
}
private static Texture2DDescription Get2DTextureDescription(GtexData gtex)
{
if (gtex.Header.IsCubeMap)
throw new Exception("IsCubeMap: true");
return new Texture2DDescription
{
ArraySize = 1,
Width = gtex.Header.Width,
Height = gtex.Header.Height,
Format = GetDxFormat(gtex.Header.Format),
MipLevels = gtex.Header.MipMapCount,
BindFlags = BindFlags.ShaderResource,
OptionFlags = ResourceOptionFlags.Shared,
Usage = ResourceUsage.Default,
CpuAccessFlags = CpuAccessFlags.None,
SampleDescription = new SampleDescription(1, 0)
};
}
private static DxTexture ReadTextureCubeFromStream(GtexData gtex, Stream input)
{
Texture2DDescription descriptor = GetTextureCubeDescription(gtex);
using (SafeUnmanagedArray array = new SafeUnmanagedArray(gtex.MipMapData.Sum(d => d.Length)))
{
DataRectangle[] rects = new DataRectangle[gtex.MipMapData.Length];
using (UnmanagedMemoryStream io = array.OpenStream(FileAccess.Write))
{
byte[] buff = new byte[32 * 1024];
for (int index = 0; index < gtex.MipMapData.Length; index++)
{
GtexMipMapLocation mimMap = gtex.MipMapData[index];
Int32 pitch = GetPitch(descriptor, index);
rects[index] = CreateDataRectangle(array, io, pitch);
input.SetPosition(mimMap.Offset);
input.CopyToStream(io, mimMap.Length, buff);
}
}
Texture2D texture = new Texture2D(_device, descriptor, rects);
// Workaround
_textureCreatingWorkaround(_device.ImmediateContext, texture, ImageFileFormat.Dds);
return new DxTexture(texture, descriptor);
}
}
public override void ReadFromStream(Stream input)
{
base.ReadFromStream(input);
TextureHeader = input.ReadContent<TextureHeader>();
Gtex = input.ReadContent<GtexData>();
}
