protected override void PostDrawCore(RenderContext context)
{
base.PostDrawCore(context);
CurrentRenderFrame = null;
}
protected override void DrawCore(RenderContext context, RenderFrame output)
{
drawAction(context, output);
}
protected override void PreDrawCore(RenderContext context)
{
base.PreDrawCore(context);
CurrentRenderFrame = context.Tags.GetSafe(RenderFrame.Current);
}
internal void InitializeFrom(GraphicsDevice device, RenderFrameDescriptor description, RenderFrame referenceFrame = null)
{
if (device == null)
{
throw new ArgumentNullException("device");
}
if (description.DepthFormat == RenderFrameDepthFormat.None && description.Format == RenderFrameFormat.None)
{
return;
}
var referenceTexture = referenceFrame != null ? referenceFrame.ReferenceTexture : device.BackBuffer;
int width = description.Width;
int height = description.Height;
if (description.Mode == RenderFrameSizeMode.Relative)
{
width = (width * referenceTexture.Width) / 100;
height = (height * referenceTexture.Height) / 100;
}
var pixelFormat = PixelFormat.None;
if (description.Format == RenderFrameFormat.LDR)
{
pixelFormat = PixelFormat.R8G8B8A8_UNorm;
}
else if (description.Format == RenderFrameFormat.HDR)
{
pixelFormat = PixelFormat.R16G16B16A16_Float;
}
var depthFormat = PixelFormat.None;
switch (description.DepthFormat)
{
case RenderFrameDepthFormat.Depth:
depthFormat = PixelFormat.D32_Float;
break;
case RenderFrameDepthFormat.DepthAndStencil:
depthFormat = PixelFormat.D24_UNorm_S8_UInt;
break;
}
// Create the render target
Texture renderTarget = null;
if (pixelFormat != PixelFormat.None)
{
renderTarget = Texture.New2D(device, width, height, 1, pixelFormat, TextureFlags.RenderTarget | TextureFlags.ShaderResource);
}
// Create the depth stencil buffer
Texture depthStencil = null;
// TODO: Better handle the case where shared cannot be used. Should we throw an exception?
if (description.DepthFormat == RenderFrameDepthFormat.Shared && referenceFrame != null && referenceFrame.DepthStencil != null &&
referenceFrame.DepthStencil.Width == width && referenceFrame.DepthStencil.Height == height)
{
depthStencil = referenceFrame.DepthStencil;
}
else if (description.DepthFormat == RenderFrameDepthFormat.Depth || description.DepthFormat == RenderFrameDepthFormat.DepthAndStencil)
{
var depthStencilExtraFlag = device.Features.Profile >= GraphicsProfile.Level_10_0 ? TextureFlags.ShaderResource : TextureFlags.None;
depthStencil = Texture.New2D(device, width, height, 1, depthFormat, TextureFlags.DepthStencil | depthStencilExtraFlag);
}
InitializeFrom(description, renderTarget != null ? new[] { renderTarget } : null, depthStencil, true);
}
/// <summary>
/// Creates a new instance of <see cref="RenderFrame"/> from the specified parameters.
/// </summary>
/// <param name="graphicsDevice">The graphics device.</param>
/// <param name="frameDescriptor">The frame descriptor.</param>
/// <param name="referenceFrame">The reference frame, when using relative mode for <see cref="RenderFrameDescriptor.Mode"/>.</param>
/// <returns>A new instance of <see cref="RenderFrame"/>.</returns>
/// <exception cref="System.ArgumentNullException">
/// graphicsDevice
/// or
/// frameDescriptor
/// </exception>
public static RenderFrame New(GraphicsDevice graphicsDevice, RenderFrameDescriptor frameDescriptor, RenderFrame referenceFrame = null)
{
// Just return null if no render frame is defined
if (frameDescriptor.DepthFormat == RenderFrameDepthFormat.None && frameDescriptor.Format == RenderFrameFormat.None)
{
return(null);
}
var renderFrame = new RenderFrame();
renderFrame.InitializeFrom(graphicsDevice, frameDescriptor, referenceFrame);
return(renderFrame);
}
/// <summary>
/// Recover a <see cref="RenderFrame" /> from a texture that has been created for a render frame.
/// </summary>
/// <param name="renderTextures">The texture.</param>
/// <param name="depthStencilTexture">The depth stencil texture.</param>
/// <returns>The instance of RenderFrame or null if no render frame was used to create this texture.</returns>
/// <exception cref="System.InvalidOperationException">The texture must be a render target</exception>
public static RenderFrame FromTexture(Texture[] renderTextures, Texture depthStencilTexture = null)
{
Texture referenceTexture = null;
if (renderTextures != null)
{
foreach (var renderTexture in renderTextures)
{
if (renderTexture != null && !renderTexture.IsRenderTarget)
{
throw new ArgumentException("The texture must be a render target", "renderTextures");
}
if (referenceTexture == null && renderTexture != null)
{
referenceTexture = renderTexture;
}
else if (renderTexture != null)
{
if (referenceTexture.Width != renderTexture.Width || referenceTexture.Height != renderTexture.Height)
{
throw new ArgumentException("Invalid textures. The textures must have the same width/height", "renderTextures");
}
}
}
}
if (depthStencilTexture != null && !depthStencilTexture.IsDepthStencil)
{
throw new ArgumentException("The texture must be a depth stencil texture", "depthStencilTexture");
}
if (referenceTexture == null && depthStencilTexture != null)
{
referenceTexture = depthStencilTexture;
}
else if (depthStencilTexture != null)
{
if (referenceTexture.Width != depthStencilTexture.Width || referenceTexture.Height != depthStencilTexture.Height)
{
throw new ArgumentException("Invalid textures/depthstencil. The textures must have the same width/height", "depthStencilTexture");
}
}
// If no relevant textures, than return null
if (referenceTexture == null)
{
return(null);
}
var descriptor = RenderFrameDescriptor.Default();
// TODO: Check for formats?
var renderFrameFormat = RenderFrameFormat.LDR;
if (referenceTexture.Format == PixelFormat.R16G16B16A16_Float)
{
renderFrameFormat = RenderFrameFormat.HDR;
}
var depthFrameFormat = RenderFrameDepthFormat.None;
if (depthStencilTexture != null)
{
depthFrameFormat = depthStencilTexture.HasStencil ? RenderFrameDepthFormat.DepthAndStencil : RenderFrameDepthFormat.Depth;
}
descriptor.Format = renderFrameFormat;
descriptor.DepthFormat = depthFrameFormat;
descriptor.Mode = RenderFrameSizeMode.Fixed;
descriptor.Width = referenceTexture.Width;
descriptor.Height = referenceTexture.Height;
var renderFrame = new RenderFrame();
renderFrame.InitializeFrom(descriptor, renderTextures, depthStencilTexture, false);
return(renderFrame);
}
/// <summary>
/// Activates the output to the current <see cref="GraphicsDevice" />.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="output">The output.</param>
/// <param name="disableDepth">if set to <c>true</c> [disable depth].</param>
protected virtual void ActivateOutputCore(RenderContext context, RenderFrame output, bool disableDepth)
{
// Setup the render target
context.GraphicsDevice.SetDepthAndRenderTargets(disableDepth ? null : output.DepthStencil, output.RenderTargets);
}
protected abstract void DrawCore(RenderContext context, RenderFrame output);
