Fixes to support versions back to 2017.1

Author: JoJo2nd

PostProcessing/Runtime/Effects/MotionBlur.cs

@@ -60,14 +60,20 @@ public override DepthTextureMode GetCameraFlags()
 
         private void CreateTemporaryRT(PostProcessRenderContext context, int nameID, int width, int height, RenderTextureFormat RTFormat)
         {
+            var cmd = context.command;
+#if UNITY_2017_2_OR_NEWER            
             var rtDesc = context.GetDescriptor(0, RTFormat, RenderTextureReadWrite.Linear);
             rtDesc.width = width;
             rtDesc.height = height;
-            var cmd = context.command;
 #if UNITY_2019_1_OR_NEWER
             cmd.GetTemporaryRT(nameID, rtDesc, FilterMode.Point);
-#else
+#elif UNITY_2017_3_OR_NEWER
             cmd.GetTemporaryRT(nameID, rtDesc.width, rtDesc.height, rtDesc.depthBufferBits, FilterMode.Point, rtDesc.colorFormat, RenderTextureReadWrite.Linear, rtDesc.msaaSamples, rtDesc.enableRandomWrite, rtDesc.memoryless, context.camera.allowDynamicResolution);
+#else            
+            cmd.GetTemporaryRT(nameID, rtDesc.width, rtDesc.height, rtDesc.depthBufferBits, FilterMode.Point, rtDesc.colorFormat, RenderTextureReadWrite.Linear, rtDesc.msaaSamples, rtDesc.enableRandomWrite, rtDesc.memoryless);
+#endif
+#else
+            cmd.GetTemporaryRT(nameID, width, height, 0, FilterMode.Point, RTFormat, RenderTextureReadWrite.Linear);
 #endif
         }
 

PostProcessing/Runtime/Effects/MultiScaleVO.cs

@@ -147,8 +147,13 @@ Vector3 GetSizeArray(MipLevel mip)
         public void GenerateAOMap(CommandBuffer cmd, Camera camera, RenderTargetIdentifier destination, RenderTargetIdentifier? depthMap, bool invert, bool isMSAA)
         {
             // Base size
+#if UNITY_2017_3_OR_NEWER
             m_ScaledWidths[0] = camera.scaledPixelWidth * (RuntimeUtilities.isSinglePassStereoEnabled ? 2 : 1);
             m_ScaledHeights[0] = camera.scaledPixelHeight;
+#else
+            m_ScaledWidths[0] = camera.pixelWidth * (RuntimeUtilities.isSinglePassStereoEnabled ? 2 : 1);
+            m_ScaledHeights[0] = camera.pixelHeight;       
+#endif
 
             // L1 -> L6 sizes
             for (int i = 1; i < 7; i++)
@@ -452,8 +457,11 @@ void PreparePropertySheet(PostProcessRenderContext context)
 
         void CheckAOTexture(PostProcessRenderContext context)
         {
-            if (m_AmbientOnlyAO == null || !m_AmbientOnlyAO.IsCreated() || m_AmbientOnlyAO.width != context.width || m_AmbientOnlyAO.height != context.height ||
-                m_AmbientOnlyAO.useDynamicScale != context.camera.allowDynamicResolution)
+            bool AOUpdateNeeded = m_AmbientOnlyAO == null || !m_AmbientOnlyAO.IsCreated() || m_AmbientOnlyAO.width != context.width || m_AmbientOnlyAO.height != context.height;
+#if UNITY_2017_3_OR_NEWER                
+            AOUpdateNeeded = AOUpdateNeeded || m_AmbientOnlyAO.useDynamicScale != context.camera.allowDynamicResolution;
+#endif                  
+            if (AOUpdateNeeded)
             {
                 RuntimeUtilities.Destroy(m_AmbientOnlyAO);
 
@@ -462,7 +470,9 @@ void CheckAOTexture(PostProcessRenderContext context)
                     hideFlags = HideFlags.DontSave,
                     filterMode = FilterMode.Point,
                     enableRandomWrite = true,
+#if UNITY_2017_3_OR_NEWER
                     useDynamicScale = context.camera.allowDynamicResolution
+#endif
                 };
                 m_AmbientOnlyAO.Create();
             }

PostProcessing/Runtime/Effects/SubpixelMorphologicalAntialiasing.cs

@@ -63,8 +63,13 @@ internal void Render(PostProcessRenderContext context)
             var cmd = context.command;
             cmd.BeginSample("SubpixelMorphologicalAntialiasing");
 
+#if UNITY_2017_3_OR_NEWER
             cmd.GetTemporaryRT(ShaderIDs.SMAA_Flip, context.width, context.height, 0, FilterMode.Bilinear, context.sourceFormat, RenderTextureReadWrite.Linear, 1, false, RenderTextureMemoryless.None, context.camera.allowDynamicResolution);
             cmd.GetTemporaryRT(ShaderIDs.SMAA_Flop, context.width, context.height, 0, FilterMode.Bilinear, context.sourceFormat, RenderTextureReadWrite.Linear, 1, false, RenderTextureMemoryless.None, context.camera.allowDynamicResolution);
+#else
+            cmd.GetTemporaryRT(ShaderIDs.SMAA_Flip, context.width, context.height, 0, FilterMode.Bilinear, context.sourceFormat, RenderTextureReadWrite.Linear, 1, false);
+            cmd.GetTemporaryRT(ShaderIDs.SMAA_Flop, context.width, context.height, 0, FilterMode.Bilinear, context.sourceFormat, RenderTextureReadWrite.Linear, 1, false);
+#endif            
 
             cmd.BlitFullscreenTriangle(context.source, ShaderIDs.SMAA_Flip, sheet, (int)Pass.EdgeDetection + (int)quality, true);
             cmd.BlitFullscreenTriangle(ShaderIDs.SMAA_Flip, ShaderIDs.SMAA_Flop, sheet, (int)Pass.BlendWeights + (int)quality);

PostProcessing/Runtime/PostProcessLayer.cs

@@ -237,10 +237,12 @@ void InitLegacy()
             m_CurrentContext = new PostProcessRenderContext();
         }
 
+#if UNITY_2019_1_OR_NEWER
         bool DynamicResolutionAllowsFinalBlitToCameraTarget()
         { 
             return (!m_Camera.allowDynamicResolution || (ScalableBufferManager.heightScaleFactor == 1.0 && ScalableBufferManager.widthScaleFactor == 1.0));
         }
+#endif
 
 #if UNITY_2019_1_OR_NEWER
         // We always use a CommandBuffer to blit to the final render target

PostProcessing/Runtime/PostProcessRenderContext.cs

@@ -395,8 +395,10 @@ public void GetScreenSpaceTemporaryRT(CommandBuffer cmd, int nameID,
 
 #if UNITY_2019_1_OR_NEWER
             cmd.GetTemporaryRT(nameID, desc, filter);
-#else
+#elif UNITY_2017_3_OR_NEWER
             cmd.GetTemporaryRT(nameID, desc.width, desc.height, desc.depthBufferBits, filter, desc.colorFormat, readWrite, desc.msaaSamples, desc.enableRandomWrite, desc.memoryless, m_Camera.allowDynamicResolution);
+#else
+            cmd.GetTemporaryRT(nameID, desc.width, desc.height, desc.depthBufferBits, filter, desc.colorFormat, readWrite, desc.msaaSamples, desc.enableRandomWrite, desc.memoryless);
 #endif
 #else
             int actualWidth = width;