public static ShaderResourceView CreateTexture2DArraySRV(Device device, DeviceContext immediateContext, string[] filenames, Format format, FilterFlags filter = FilterFlags.None, FilterFlags mipFilter = FilterFlags.Linear)
{
var srcTex = new Texture2D[filenames.Length];
for (int i = 0; i < filenames.Length; i++)
{
var loadInfo = new ImageLoadInformation {
FirstMipLevel = 0,
Usage = ResourceUsage.Staging,
BindFlags = BindFlags.None,
CpuAccessFlags = CpuAccessFlags.Write | CpuAccessFlags.Read,
OptionFlags = ResourceOptionFlags.None,
Format = format,
FilterFlags = filter,
MipFilterFlags = mipFilter,
};
srcTex[i] = Texture2D.FromFile(device, filenames[i], loadInfo);
}
var texElementDesc = srcTex[0].Description;
var texArrayDesc = new Texture2DDescription {
Width = texElementDesc.Width,
Height = texElementDesc.Height,
MipLevels = texElementDesc.MipLevels,
ArraySize = srcTex.Length,
Format = texElementDesc.Format,
SampleDescription = new SampleDescription(1, 0),
Usage = ResourceUsage.Default,
BindFlags = BindFlags.ShaderResource,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None
};
var texArray = new Texture2D(device, texArrayDesc);
texArray.DebugName = "texture array: + " + filenames.Aggregate((i, j) => i + ", " + j);
for (int texElement = 0; texElement < srcTex.Length; texElement++)
{
for (int mipLevel = 0; mipLevel < texElementDesc.MipLevels; mipLevel++)
{
var mappedTex2D = immediateContext.MapSubresource(srcTex[texElement], mipLevel, 0, MapMode.Read, MapFlags.None);
immediateContext.UpdateSubresource(
mappedTex2D,
texArray,
Resource.CalculateSubresourceIndex(mipLevel, texElement, texElementDesc.MipLevels)
);
immediateContext.UnmapSubresource(srcTex[texElement], mipLevel);
}
}
var viewDesc = new ShaderResourceViewDescription {
Format = texArrayDesc.Format,
Dimension = ShaderResourceViewDimension.Texture2DArray,
MostDetailedMip = 0,
MipLevels = texArrayDesc.MipLevels,
FirstArraySlice = 0,
ArraySize = srcTex.Length
};
var texArraySRV = new ShaderResourceView(device, texArray, viewDesc);
ReleaseCom(ref texArray);
for (int i = 0; i < srcTex.Length; i++)
{
ReleaseCom(ref srcTex[i]);
}
return(texArraySRV);
}
