/// <summary> /// Applies the layer to an aperture texture. The output /// is to be understood as the transmittance through any /// pixel, and will be blended multiplicatively together /// with other layers (as such, order does not matter). /// </summary> /// <param name="context">The device context.</param> /// <param name="output">The output aperture.</param> /// <param name="profile">An optical profile.</param> /// <param name="pass">A SurfacePass instance.</param> /// <param name="time">The elapsed time.</param> /// <param name="dt">The time since last call.</param> public abstract void ApplyLayer(DeviceContext context, GraphicsResource output, OpticalProfile profile, SurfacePass pass, double time, double dt);
public void Render(RenderTargetView renderTargetView, DeviceContext context, SurfacePass pass)
{
// TODO: generate sky envmap here, with custom params
pass.Pass(context, @"
struct PS_IN
{
float4 pos : SV_POSITION;
float2 tex : TEXCOORD;
};
float3 main(PS_IN input) : SV_Target
{
float phi = 2 * 3.14159265 * input.tex.x;
float theta = 3.14159265 * input.tex.y;
float3 p = float3(sin(theta) * cos(phi), cos(theta), sin(theta) * sin(phi));
float brightness = 500;
if (p.y < 0) return lerp(float3(1, 1, 1), float3(0, 0, 0), -p.y) * brightness;
/* TEMPORARY */
float sunBrightness = (dot(p, normalize(float3(-0.5f, 0.8f, 0.9f))) > 0.9995f) ? 1 : 0;
return lerp(float3(1, 1, 1), float3(0.7f, 0.7f, 1), p.y) * brightness + sunBrightness * 50000;
}
", skyEnvMap.Dimensions, skyEnvMap.RTV, null, null);
context.OutputMerger.SetRenderTargets((RenderTargetView)null);
context.ClearDepthStencilView(depthStencilView, DepthStencilClearFlags.Depth, 1.0f, 0);
context.ClearRenderTargetView(renderTargetView, new Color4(0.5f, 0, 1, 1));
context.Rasterizer.State = rasterizerState;
context.OutputMerger.DepthStencilState = depthStencilState;
context.OutputMerger.SetTargets(depthStencilView, renderTargetView);
context.Rasterizer.SetViewports(new[] { new ViewportF(0, 0, RenderDimensions.Width, RenderDimensions.Height) });
context.Rasterizer.SetScissorRectangles(new[] { new SharpDX.Rectangle(0, 0, RenderDimensions.Width, RenderDimensions.Height) });
context.VertexShader.Set(vertexShader);
context.InputAssembler.InputLayout = inputLayout;
context.PixelShader.SetShaderResource(0, skyEnvMap.SRV);
context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
{
DataStream cameraStream;
context.MapSubresource(cameraBuffer, MapMode.WriteDiscard, MapFlags.None, out cameraStream);
camera.WriteTo(cameraStream);
context.UnmapSubresource(cameraBuffer, 0);
cameraStream.Dispose();
}
context.VertexShader.SetConstantBuffer(0, cameraBuffer);
context.PixelShader.SetConstantBuffer(0, cameraBuffer);
foreach (Model model in models.Values)
model.Render(context, camera, materials, proxy);
}
/// <summary>
/// Generates the diffraction spectrum of a texture. The source texture
/// must be the exact resolution specified in the constructor, however,
/// the output will be resized to the destination texture as needed.
/// </summary>
/// <param name="device">The graphics device to use.</param>
/// <param name="context">The device context to use.</param>
/// <param name="pass">A SurfacePass instance.</param>
/// <param name="renderSize">The dimensions of the render target.</param>
/// <param name="destination">The destination render target view.</param>
/// <param name="source">The source texture, can be the same resource as the render target.</param>
/// <param name="fNumber">The distance at which to evaluate the aperture transmission function.</param>
public void Diffract(Device device, DeviceContext context, SurfacePass pass, Size renderSize, RenderTargetView destination, ShaderResourceView source, double fNumber)
{
if (source.Description.Dimension != ShaderResourceViewDimension.Texture2D)
throw new ArgumentException("Source SRV must point to a Texture2D resource of suitable dimensions.");
//if (new Size(source.ResourceAs<Texture2D>().Description.Width, source.ResourceAs<Texture2D>().Description.Height) != resolution)
// throw new ArgumentException("Source texture must be the same dimensions as diffraction resolution.");
pass.Pass(context, Encoding.ASCII.GetString(Resources.DiffractionTexToBuf), new ViewportF(0, 0, resolution.Width, resolution.Height), null, new[] { source }, new[] { buffer.view }, null);
DataStream cbuffer = new DataStream(8, true, true);
cbuffer.Write<uint>((uint)resolution.Width);
cbuffer.Write<uint>((uint)resolution.Height);
cbuffer.Position = 0;
UnorderedAccessView fftView = fft.ForwardTransform(buffer.view);
pass.Pass(context, Encoding.ASCII.GetString(Resources.DiffractionBufToTex), new ViewportF(0, 0, transform.Dimensions.Width, transform.Dimensions.Height), transform.RTV, null, new[] { fftView }, cbuffer);
fftView.Dispose();
cbuffer.Dispose();
cbuffer = new DataStream(4, true, true);
cbuffer.Write<float>((float)fNumber);
cbuffer.Position = 0;
pass.Pass(context, Encoding.ASCII.GetString(Resources.DiffractionSpectrum), spectrum.Dimensions, spectrum.RTV, new[] { transform.SRV }, cbuffer);
context.GenerateMips(spectrum.SRV);
cbuffer.Dispose();
cbuffer = new DataStream(4, true, true);
cbuffer.Write<float>((float)fNumber);
cbuffer.Position = 0;
pass.Pass(context, Encoding.ASCII.GetString(Resources.DiffractionNormalize), renderSize, destination, new[] { spectrum.SRV }, cbuffer);
cbuffer.Dispose();
}
/// <summary>
/// Tone-maps a texture into another. The target dimensions,
/// source dimensions, and ToneMapper dimensions <b>must</b>
/// be exactly the same for correct operation.
/// </summary>
/// <param name="context">The device context.</param>
/// <param name="pass">A SurfacePass instance.</param>
/// <param name="target">The render target.</param>
/// <param name="source">The source texture.</param>
public void ToneMap(DeviceContext context, SurfacePass pass, RenderTargetView target, ShaderResourceView source)
{
pass.Pass(context, averageShader, temporary.Dimensions, temporary.RTV, new[] { source }, null);
context.GenerateMips(temporary.SRV);
DataStream cbuffer = new DataStream(8, true, true);
cbuffer.Write<float>((float)(1.0 / Gamma));
cbuffer.Write<float>((float)Exposure);
cbuffer.Position = 0;
pass.Pass(context, operateShader, temporary.Dimensions, target, new[] { temporary.SRV }, cbuffer);
cbuffer.Dispose();
}
private void ZeroPad(Device device, DeviceContext context, SurfacePass pass, ShaderResourceView source, UnorderedAccessView target, String channel)
{
ViewportF viewport = new ViewportF(0, 0, resolution.Width, resolution.Height);
DataStream cbuffer = new DataStream(8, true, true);
cbuffer.Write<uint>((uint)resolution.Width);
cbuffer.Write<uint>((uint)resolution.Height);
cbuffer.Position = 0;
pass.Pass(context, "#define CHANNEL " + channel + "\n" + Encoding.ASCII.GetString(Resources.ConvolutionZeroPad), viewport, null, new[] { source }, new[] { target }, cbuffer);
cbuffer.Dispose();
}
private void ConvolveChannel(Device device, DeviceContext context, SurfacePass pass, ShaderResourceView sourceA, ShaderResourceView sourceB, GraphicsResource target, String channel)
{
if ((channel != "x") && (channel != "y") && (channel != "z")) throw new ArgumentException("Invalid RGB channel specified.");
ViewportF viewport = new ViewportF(0, 0, resolution.Width, resolution.Height);
ZeroPad(device, context, pass, sourceA, lBuf.view, channel);
ZeroPad(device, context, pass, sourceB, rBuf.view, channel);
fft.ForwardTransform(lBuf.view, tBuf.view);
fft.ForwardTransform(rBuf.view, lBuf.view);
DataStream cbuffer = new DataStream(8, true, true);
cbuffer.Write<uint>((uint)resolution.Width);
cbuffer.Write<uint>((uint)resolution.Height);
cbuffer.Position = 0;
pass.Pass(context, Encoding.ASCII.GetString(Resources.ConvolutionMultiply), viewport, null, null, new[] { tBuf.view, lBuf.view }, cbuffer);
cbuffer.Dispose();
cbuffer = new DataStream(8, true, true);
cbuffer.Write<uint>((uint)resolution.Width);
cbuffer.Write<uint>((uint)resolution.Height);
cbuffer.Position = 0;
UnorderedAccessView fftView = fft.InverseTransform(tBuf.view);
pass.Pass(context, Encoding.ASCII.GetString(Resources.ConvolutionOutput), target.Dimensions, target.RTV, null, new[] { fftView }, cbuffer);
fftView.Dispose();
cbuffer.Dispose();
}
public void Convolve(Device device, DeviceContext context, SurfacePass pass, Size renderSize, RenderTargetView destination, ShaderResourceView a, ShaderResourceView b, bool scaleCorrect)
{
pass.Pass(context, Encoding.ASCII.GetString(Resources.ConvolutionRescale), staging.Dimensions, staging.RTV, new[] { b }, null);
ConvolveChannel(device, context, pass, a, staging.SRV, rConvolved, "x");
ConvolveChannel(device, context, pass, a, staging.SRV, gConvolved, "y");
ConvolveChannel(device, context, pass, a, staging.SRV, bConvolved, "z");
if (scaleCorrect) context.OutputMerger.SetBlendState(blendState);
pass.Pass(context, Encoding.ASCII.GetString(Resources.ConvolutionCompose), renderSize, destination, new[] { rConvolved.SRV, gConvolved.SRV, bConvolved.SRV }, null); // TODO: better resizing later
context.OutputMerger.SetBlendState(null);
}
/// <summary>
/// Creates a LensFlare instance with custom settings. The graphics device
/// will be reused, but will not be disposed of at instance destruction.
/// </summary>
/// <param name="device">The graphics device to use.</param>
/// <param name="context">The device context to use.</param>
/// <param name="quality">The required render quality.</param>
/// <param name="profile">The desired optical profile.</param>
/// <param name="options">The desired diffraction options.</param>
public EyeDiffraction(Device device, DeviceContext context, RenderQuality quality, OpticalProfile profile, DiffractionOptions options)
{
Pass = new SurfacePass(device);
composer = new ApertureComposer(device);
Device = device; /* Store the device. */
Context = context; /* Save the context. */
Quality = quality; /* Validate quality. */
Profile = profile; /* Use lens profile. */
Options = options; /* Save the options. */
}
/// <summary>
/// Composes an aperture.
/// </summary>
/// <param name="context">The device context.</param>
/// <param name="output">The output render target.</param>
/// <param name="profile">The optical profile to use.</param>
/// <param name="pass">A SurfacePass instance to use.</param>
/// <param name="time">The elapsed time.</param>
/// <param name="dt">The time since last call.</param>
public void Compose(DeviceContext context, GraphicsResource output, OpticalProfile profile, SurfacePass pass, double time, double dt)
{
context.ClearRenderTargetView(output.RTV, Color4.White);
context.OutputMerger.SetBlendState(blendState);
foreach (ApertureLayer layer in layers)
layer.ApplyLayer(context, output, profile, pass, time, dt);
context.OutputMerger.SetBlendState(null);
}