/// <summary>
 /// NextGenSprites:
 /// Returns a string to pass as ShaderProperty for controlling Material properties.
 /// </summary>
 /// <param name="slot">ShaderTexture Enum</param>
 /// <returns>string</returns>
 public static string GetString(this ShaderTexture slot)
 {
     return(TextureProperties [(int)slot]);
 }
        /// <summary>
        /// Updates host shaders based on the guest GPU state.
        /// </summary>
        private void UpdateShaderState()
        {
            ShaderAddresses addresses = new ShaderAddresses();

            Span <ShaderAddresses> addressesSpan = MemoryMarshal.CreateSpan(ref addresses, 1);

            Span <ulong> addressesArray = MemoryMarshal.Cast <ShaderAddresses, ulong>(addressesSpan);

            ulong baseAddress = _state.State.ShaderBaseAddress.Pack();

            for (int index = 0; index < 6; index++)
            {
                var shader = _state.State.ShaderState[index];

                if (!shader.UnpackEnable() && index != 1)
                {
                    continue;
                }

                addressesArray[index] = baseAddress + shader.Offset;
            }

            GpuAccessorState gas = new GpuAccessorState(
                _state.State.TexturePoolState.Address.Pack(),
                _state.State.TexturePoolState.MaximumId,
                (int)_state.State.TextureBufferIndex,
                _state.State.EarlyZForce,
                _drawState.Topology);

            ShaderBundle gs = _channel.MemoryManager.Physical.ShaderCache.GetGraphicsShader(ref _state.State, _channel, gas, addresses);

            byte oldVsClipDistancesWritten = _vsClipDistancesWritten;

            _drawState.VsUsesInstanceId = gs.Shaders[0]?.Info.UsesInstanceId ?? false;
            _vsClipDistancesWritten     = gs.Shaders[0]?.Info.ClipDistancesWritten ?? 0;

            if (oldVsClipDistancesWritten != _vsClipDistancesWritten)
            {
                UpdateUserClipState();
            }

            int storageBufferBindingsCount = 0;
            int uniformBufferBindingsCount = 0;

            for (int stage = 0; stage < Constants.ShaderStages; stage++)
            {
                ShaderProgramInfo info = gs.Shaders[stage]?.Info;

                _currentProgramInfo[stage] = info;

                if (info == null)
                {
                    _channel.TextureManager.SetGraphicsTextures(stage, Array.Empty <TextureBindingInfo>());
                    _channel.TextureManager.SetGraphicsImages(stage, Array.Empty <TextureBindingInfo>());
                    _channel.BufferManager.SetGraphicsStorageBufferBindings(stage, null);
                    _channel.BufferManager.SetGraphicsUniformBufferBindings(stage, null);
                    continue;
                }

                var textureBindings = new TextureBindingInfo[info.Textures.Count];

                for (int index = 0; index < info.Textures.Count; index++)
                {
                    var descriptor = info.Textures[index];

                    Target target = ShaderTexture.GetTarget(descriptor.Type);

                    textureBindings[index] = new TextureBindingInfo(
                        target,
                        descriptor.Binding,
                        descriptor.CbufSlot,
                        descriptor.HandleIndex,
                        descriptor.Flags);
                }

                _channel.TextureManager.SetGraphicsTextures(stage, textureBindings);

                var imageBindings = new TextureBindingInfo[info.Images.Count];

                for (int index = 0; index < info.Images.Count; index++)
                {
                    var descriptor = info.Images[index];

                    Target target = ShaderTexture.GetTarget(descriptor.Type);
                    Format format = ShaderTexture.GetFormat(descriptor.Format);

                    imageBindings[index] = new TextureBindingInfo(
                        target,
                        format,
                        descriptor.Binding,
                        descriptor.CbufSlot,
                        descriptor.HandleIndex,
                        descriptor.Flags);
                }

                _channel.TextureManager.SetGraphicsImages(stage, imageBindings);

                _channel.BufferManager.SetGraphicsStorageBufferBindings(stage, info.SBuffers);
                _channel.BufferManager.SetGraphicsUniformBufferBindings(stage, info.CBuffers);

                if (info.SBuffers.Count != 0)
                {
                    storageBufferBindingsCount = Math.Max(storageBufferBindingsCount, info.SBuffers.Max(x => x.Binding) + 1);
                }

                if (info.CBuffers.Count != 0)
                {
                    uniformBufferBindingsCount = Math.Max(uniformBufferBindingsCount, info.CBuffers.Max(x => x.Binding) + 1);
                }
            }

            _channel.BufferManager.SetGraphicsStorageBufferBindingsCount(storageBufferBindingsCount);
            _channel.BufferManager.SetGraphicsUniformBufferBindingsCount(uniformBufferBindingsCount);

            _context.Renderer.Pipeline.SetProgram(gs.HostProgram);
        }