/// <summary>
/// Creates a render target texture with the given width and height.
/// </summary>
/// <param name="device">Graphics device.</param>
/// <param name="width">Width of generated texture.</param>
/// <param name="height">Height of generated texture.</param>
public D3D11.Texture2D CreateRenderTargetTexture(D3D11.Device device, int width, int height)
{
var textureDescription = new D3D11.Texture2DDescription();
if (TryEnableAntialiasing)
{
var maxCount = 1;
for (var i = 0; i < 32; i++)
{
if (device.CheckMultisampleQualityLevels(DXGI.Format.B8G8R8A8_UNorm, i) > 0)
maxCount = i;
}
textureDescription.Width = width;
textureDescription.Height = height;
textureDescription.MipLevels = 1;
textureDescription.ArraySize = 1;
textureDescription.Format = DXGI.Format.B8G8R8A8_UNorm;
textureDescription.Usage = D3D11.ResourceUsage.Default;
textureDescription.SampleDescription = new DXGI.SampleDescription(maxCount, 0);
textureDescription.BindFlags = D3D11.BindFlags.ShaderResource | D3D11.BindFlags.RenderTarget;
textureDescription.CpuAccessFlags = D3D11.CpuAccessFlags.None;
textureDescription.OptionFlags = D3D11.ResourceOptionFlags.None;
}
else
{
textureDescription.Width = width;
textureDescription.Height = height;
textureDescription.MipLevels = 1;
textureDescription.ArraySize = 1;
textureDescription.Format = DXGI.Format.B8G8R8A8_UNorm;
textureDescription.Usage = D3D11.ResourceUsage.Default;
textureDescription.SampleDescription = new DXGI.SampleDescription(1, 0);
textureDescription.BindFlags = D3D11.BindFlags.ShaderResource | D3D11.BindFlags.RenderTarget;
textureDescription.CpuAccessFlags = D3D11.CpuAccessFlags.None;
textureDescription.OptionFlags = D3D11.ResourceOptionFlags.None;
}
return new D3D11.Texture2D(device, textureDescription);
}
public void SetBackBufferDX11(D3D11.Texture2D texture)
{
if (m_sharedTexture != null)
{
m_sharedTexture.Dispose();
m_sharedTexture = null;
}
if (texture == null)
{
Lock();
SetBackBuffer(D3DResourceType.IDirect3DSurface9, IntPtr.Zero);
Unlock();
}
else
{
if (IsShareable(texture) == false)
throw new ArgumentException("Texture must be created with ResourceOptionFlags.Shared");
D3D9.Format format = TranslateFormat(texture);
if (format == D3D9.Format.Unknown)
throw new ArgumentException("Texture format is not compatible with OpenSharedResource");
IntPtr handle = GetSharedHandle(texture);
if (handle == IntPtr.Zero)
throw new ArgumentNullException("Handle");
m_sharedTexture = new D3D9.Texture(s_device, texture.Description.Width, texture.Description.Height, 1,
D3D9.Usage.RenderTarget, format, D3D9.Pool.Default, ref handle);
using (D3D9.Surface surface = m_sharedTexture.GetSurfaceLevel(0))
{
Lock();
SetBackBuffer(D3DResourceType.IDirect3DSurface9, surface.NativePointer);
Unlock();
}
}
}
public void CheckTexture(ref D3D11.Texture2D tx, GDI.Size size)
{
if (tx == null)
return;
if (tx.Description.Width != size.Width ||
tx.Description.Height != size.Height)
{
tx.Dispose();
tx = null;
}
}
/// <summary>
/// Creates a staging texture which enables copying data from gpu to cpu memory.
/// </summary>
/// <param name="device">Graphics device.</param>
/// <param name="size">The size of generated texture.</param>
public D3D11.Texture2D CreateStagingTexture(D3D11.Device device, GDI.Size size)
{
CheckTexture(ref _copyHelperTextureStaging, size);
if (_copyHelperTextureStaging != null)
return _copyHelperTextureStaging;
//For handling of staging resource see
// http://msdn.microsoft.com/en-us/library/windows/desktop/ff476259(v=vs.85).aspx
D3D11.Texture2DDescription textureDescription = new D3D11.Texture2DDescription();
textureDescription.Width = size.Width;
textureDescription.Height = size.Height;
textureDescription.MipLevels = 1;
textureDescription.ArraySize = 1;
textureDescription.Format = DXGI.Format.B8G8R8A8_UNorm;
textureDescription.Usage = D3D11.ResourceUsage.Staging;
textureDescription.SampleDescription = new DXGI.SampleDescription(1, 0);
textureDescription.BindFlags = D3D11.BindFlags.None;
textureDescription.CpuAccessFlags = D3D11.CpuAccessFlags.Read;
textureDescription.OptionFlags = D3D11.ResourceOptionFlags.None;
return new D3D11.Texture2D(device, textureDescription);
}
static IntPtr GetSharedHandle(D3D11.Texture2D texture)
{
var resource = texture.QueryInterface<SharpDX.DXGI.Resource>();
IntPtr result = resource.SharedHandle;
resource.Dispose();
return result;
}
static D3D9.Format TranslateFormat(D3D11.Texture2D texture)
{
switch (texture.Description.Format)
{
case SharpDX.DXGI.Format.R10G10B10A2_UNorm:
return SharpDX.Direct3D9.Format.A2B10G10R10;
case SharpDX.DXGI.Format.R16G16B16A16_Float:
return SharpDX.Direct3D9.Format.A16B16G16R16F;
case SharpDX.DXGI.Format.B8G8R8A8_UNorm:
return SharpDX.Direct3D9.Format.A8R8G8B8;
default:
return SharpDX.Direct3D9.Format.Unknown;
}
}
static bool IsShareable(D3D11.Texture2D texture)
{
return (texture.Description.OptionFlags & D3D11.ResourceOptionFlags.Shared) != 0;
}
