Fixed history buffer binding

ScriptableRenderPipeline/Core/CoreRP/Textures/RTHandleSystem.RTHandle.cs

             internal Vector2 scaleFactor        = Vector2.one;
             internal ScaleFunc scaleFunc;
 
-            public bool useScaling { get; internal set; }
+            public bool                         useScaling { get; internal set; }
+            public Vector2Int                   referenceSize {get; internal set; }
 
             public RenderTexture rt
             {
                 {
                     var refRT = m_RTs[(int)RTCategory.MSAA];
                     Debug.Assert(refRT != null);
-                    var scaledSize = GetScaledSize(new Vector2Int(m_Owner.maxWidthRegular, m_Owner.maxHeightRegular));
+                    referenceSize = new Vector2Int(m_Owner.maxWidthRegular, m_Owner.maxHeightRegular);
+                    var scaledSize = GetScaledSize(referenceSize);
 
                     var newRT = new RenderTexture(scaledSize.x, scaledSize.y, refRT.depth, refRT.format, refRT.sRGB ? RenderTextureReadWrite.sRGB : RenderTextureReadWrite.Linear)
                     {

ScriptableRenderPipeline/Core/CoreRP/Textures/RTHandleSystem.cs

                     continue;
 
                 var rt = rth.m_RTs[i];
-                var scaledSize = rth.GetScaledSize(new Vector2Int(m_MaxWidths[i], m_MaxHeights[i]));
+                rth.referenceSize = new Vector2Int(m_MaxWidths[i], m_MaxHeights[i]);
+                var scaledSize = rth.GetScaledSize(rth.referenceSize);
                 scaledSize = Vector2Int.Max(Vector2Int.one, scaledSize);
 
                 var enableMSAA = i == (int)RTCategory.MSAA;
 
                     if (enableMSAA)
                         rt.antiAliasing = (int)m_ScaledRTCurrentMSAASamples;
+
+                    rt.width = scaledSize.x;
+                    rt.height = scaledSize.y;
 
                     rt.name = CoreUtils.GetRenderTargetAutoName(
                         rt.width, 
             for (int i = 0, c = m_AutoSizedRTsArray.Length; i < c; ++i)
             {
                 var rth = m_AutoSizedRTsArray[i];
+                rth.referenceSize = maxSize;
+                
                 var rt = rth.m_RTs[(int)category];
 
                 // This can happen if you create a RTH for MSAA. By default we only create the MSAA version of the target.
                     rt.Release();
 
-                    Vector2Int scaledSize = rth.GetScaledSize(maxSize);
+                    var scaledSize = rth.GetScaledSize(maxSize);
 
                     rt.width = Mathf.Max(scaledSize.x, 1);
                     rt.height = Mathf.Max(scaledSize.y, 1);

ScriptableRenderPipeline/HDRenderPipeline/HDRP/HDRenderPipeline.cs

 
                 var previousDepthPyramidRT = hdCamera.GetPreviousFrameRT((int)HDCameraFrameHistoryType.DepthPyramid);
                 if (previousDepthPyramidRT != null)
+                {
+                    cmd.SetGlobalVector(HDShaderIDs._DepthPyramidSize, new Vector4(
+                        previousDepthPyramidRT.referenceSize.x, 
+                        previousDepthPyramidRT.referenceSize.y, 
+                        1f / previousDepthPyramidRT.referenceSize.x, 
+                        1f / previousDepthPyramidRT.referenceSize.y
+                    ));
+                    cmd.SetGlobalVector(HDShaderIDs._DepthPyramidScale, new Vector4(
+                        previousDepthPyramidRT.referenceSize.x / (float)previousDepthPyramidRT.rt.width, 
+                        previousDepthPyramidRT.referenceSize.y / (float)previousDepthPyramidRT.rt.height, 
+                        Mathf.Log(Mathf.Min(previousDepthPyramidRT.rt.width, previousDepthPyramidRT.rt.height), 2), 
+                        0.0f
+                    ));
+                }
+                    
+                {
+                    cmd.SetGlobalVector(HDShaderIDs._ColorPyramidSize, new Vector4(
+                        previousColorPyramidRT.referenceSize.x, 
+                        previousColorPyramidRT.referenceSize.y, 
+                        1f / previousColorPyramidRT.referenceSize.x, 
+                        1f / previousColorPyramidRT.referenceSize.y
+                    ));
+                    cmd.SetGlobalVector(HDShaderIDs._ColorPyramidScale, new Vector4(
+                        previousColorPyramidRT.referenceSize.x / (float)previousColorPyramidRT.rt.width, 
+                        previousColorPyramidRT.referenceSize.y / (float)previousColorPyramidRT.rt.height, 
+                        Mathf.Log(Mathf.Min(previousColorPyramidRT.rt.width, previousColorPyramidRT.rt.height), 2), 
+                        0.0f
+                    ));
+                }
             }
         }
 
                     m_DebugScreenSpaceTracingData.GetData(m_DebugScreenSpaceTracingDataArray);
                     var data = m_DebugScreenSpaceTracingDataArray[0];
                     m_CurrentDebugDisplaySettings.screenSpaceTracingDebugData = data;
+
+                    // Assign -1 in tracing model to notifiy we took the data.
+                    // When debugging in forward, we want only the first time the pixel is drawn
+                    data.tracingModel = (Lit.SSRayModel)(-1);
+                    m_DebugScreenSpaceTracingDataArray[0] = data;
+                    m_DebugScreenSpaceTracingData.SetData(m_DebugScreenSpaceTracingDataArray);
                 }
             } // For each camera
         }
                 {
                     case ForwardPass.Opaque:
                     {
-                        var bindIndex = 0;
                         // In case of forward SSS we will bind all the required target. It is up to the shader to write into it or not.
                         if (m_FrameSettings.enableSubsurfaceScattering)
                         {
                             }
 
                             HDUtils.SetRenderTarget(cmd, hdCamera, m_MRTWithSSS, m_CameraDepthStencilBuffer);
-                            bindIndex += m_MRTWithSSS.Length;
-                            ++bindIndex;
                         }
 
                         m_ForwardAndForwardOnlyPassNames[0] = m_ForwardOnlyPassNames[0] =
                         if (debugSSTThisPass)
                         {
                             cmd.SetGlobalBuffer(HDShaderIDs._DebugScreenSpaceTracingData, m_DebugScreenSpaceTracingData);
-                            cmd.SetRandomWriteTarget(bindIndex, m_DebugScreenSpaceTracingData);
+                            cmd.SetRandomWriteTarget(7, m_DebugScreenSpaceTracingData);
                         }
                         RenderOpaqueRenderList(cullResults, camera, renderContext, cmd, passNames, m_currentRendererConfigurationBakedLighting);
                         if (debugSSTThisPass)
                         if (debugSSTThisPass)
                         {
                             cmd.SetGlobalBuffer(HDShaderIDs._DebugScreenSpaceTracingData, m_DebugScreenSpaceTracingData);
-                            cmd.SetRandomWriteTarget(1, m_DebugScreenSpaceTracingData);
+                            cmd.SetRandomWriteTarget(7, m_DebugScreenSpaceTracingData);
                         }
                         RenderTransparentRenderList(cullResults, camera, renderContext, cmd, m_AllTransparentPassNames, m_currentRendererConfigurationBakedLighting, pass == ForwardPass.PreRefraction ? HDRenderQueue.k_RenderQueue_PreRefraction : HDRenderQueue.k_RenderQueue_Transparent);
                         if (debugSSTThisPass)