public static H1GpuMemoryPageTexture3D CreatePage(H1GpuMemoryChunk owner, H1Texture3D.Description desc)
{
H1GpuMemoryPageTexture3D newTexture3D = new H1GpuMemoryPageTexture3D(owner);
// convert texture1D description to appropriate input parameters to create texture1D
H1PixelFormat format = desc.Format;
Int32 width = Convert.ToInt32(desc.Width);
Int32 height = Convert.ToInt32(desc.Height);
Int32 depthOrArraySize = Convert.ToInt32(desc.Depth);
H1OptionalParametersForTexture options = null;
if (desc.MipLevels != 1) // if there is any optional property to apply
{
options = new H1OptionalParametersForTexture()
{
MipLevels = Convert.ToUInt16(desc.MipLevels),
};
}
if (!newTexture3D.CreatePage(format, width, height, depthOrArraySize, options))
{
return(null);
}
return(newTexture3D);
}
// static method for more general creat page for texture resided in GPU memory
protected virtual Boolean CreatePage(H1PixelFormat format, Int32 width, Int32 height, Int32 depthOrArraySize, H1OptionalParametersForTexture options = null)
{
// invalid call for create page
if (Owner.PageType != H1GpuMemoryPageType.Normal)
{
return(false);
}
// create resource encapsulated GPU API layer
H1HeapType heapType = H1HeapType.Unknown;
H1ResourceStates usage = H1ResourceStates.Invalid;
if (Owner.Type != H1GpuMemoryType.GpuWritable)
{
// invalid gpu memory type
// CpuWritable type should be H1GpuMemoryPageSegmented type
return(false);
}
// GPU-writable
heapType = H1HeapType.Default;
H1GpuResourceDesc resourceDesc = new H1GpuResourceDesc();
resourceDesc.Alignment = 0; // depends on GDI decision for choosing appropriate alignment
resourceDesc.Width = Convert.ToUInt32(width);
resourceDesc.Height = Convert.ToUInt32(height);
resourceDesc.DepthOrArraySize = Convert.ToUInt16(depthOrArraySize);
resourceDesc.Format = format;
// these description properties are default values
resourceDesc.SampleDesc.Count = 1;
resourceDesc.SampleDesc.Quality = 0;
resourceDesc.Layout = H1TextureLayout.RowMajor;
resourceDesc.MipLevels = 1;
// apply optional parameters
if (options != null)
{
resourceDesc.Flags = options.ResourceFlags;
usage = options.ResourceStates;
// resource description optional parameters
resourceDesc.MipLevels = options.MipLevels;
resourceDesc.Layout = options.Layout;
// struct copy (shallow copy should be occurred)
resourceDesc.SampleDesc = options.SampleDesc;
}
// create new page resource
//if (!Resource.CreateResource(heapType, resourceDesc, usage))
{
return(false);
}
//return true;
}