public unsafe Texture2D GetTexture(Imaging.ImageFile source)
{
var key = source.Path;
Texture2D tex;
if (_Textures.TryGetValue(key, out tex))
return tex;
byte[] buffer;
var desc = new Texture2DDescription {
ArraySize = 1,
BindFlags = BindFlags.ShaderResource,
CpuAccessFlags = CpuAccessFlags.None,
Height = source.Height,
Width = source.Width,
MipLevels = 1,
OptionFlags = ResourceOptionFlags.None,
SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
Usage = ResourceUsage.Immutable
};
if (source.Format == Imaging.ImageFormat.A16R16G16B16Float) {
buffer = source.GetData();
desc.Format = SharpDX.DXGI.Format.R16G16B16A16_Float;
} else {
buffer = Imaging.ImageConverter.GetA8R8G8B8(source);
for (var i = 0; i < buffer.Length; i += 4) {
var r = buffer[i + 0];
var b = buffer[i + 2];
buffer[i + 0] = b;
buffer[i + 2] = r;
}
desc.Format = SharpDX.DXGI.Format.R8G8B8A8_UNorm;
if (source.Format == Imaging.ImageFormat.A8R8G8B8_Cube)
desc.ArraySize = 6;
}
fixed (byte* p = buffer) {
var ptr = (IntPtr)p;
var pitch = SharpDX.DXGI.FormatHelper.SizeOfInBytes(desc.Format) * source.Width;
var dataRects = new DataRectangle[desc.ArraySize];
for (var i = 0; i < desc.ArraySize; ++i)
dataRects[i] = new DataRectangle(ptr + i * pitch * source.Height, pitch);
tex = new Texture2D(_Engine.Device, desc, dataRects);
}
_Textures.Add(key, tex);
return tex;
}
