Prepare dual filter shader

shaders/cDualFilter.fx

@@ -33,4 +33,146 @@
     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+#define BUFFER_SIZE_1 uint2(BUFFER_WIDTH >> 1, BUFFER_HEIGHT >> 1)
+#define BUFFER_SIZE_2 uint2(BUFFER_WIDTH >> 2, BUFFER_HEIGHT >> 2)
+#define BUFFER_SIZE_3 uint2(BUFFER_WIDTH >> 3, BUFFER_HEIGHT >> 3)
+#define BUFFER_SIZE_4 uint2(BUFFER_WIDTH >> 4, BUFFER_HEIGHT >> 4)
 
+namespace SharedResources
+{
+    namespace RGBA16F
+    {
+        texture2D _RenderTemporary1 < pooled = true; >
+        {
+            Width = BUFFER_SIZE_1.x;
+            Height = BUFFER_SIZE_1.y;
+            Format = RGBA16F;
+            MipLevels = 8;
+        };
+
+        texture2D _RenderTemporary2 < pooled = true; >
+        {
+            Width = BUFFER_SIZE_2.x;
+            Height = BUFFER_SIZE_2.y;
+            Format = RGBA16F;
+        };
+
+        texture2D _RenderTemporary3 < pooled = true; >
+        {
+            Width = BUFFER_SIZE_3.x;
+            Height = BUFFER_SIZE_3.y;
+            Format = RGBA16F;
+        };
+
+        texture2D _RenderTemporary4 < pooled = true; >
+        {
+            Width = BUFFER_SIZE_4.x;
+            Height = BUFFER_SIZE_4.y;
+            Format = RGBA16F;
+        };
+    }
+}
+
+// Shader properties
+
+uniform int _DownsampleMethod <
+    ui_type = "combo";
+    ui_items = " Box\0 Jorge\0 Kawase\0 None\0";
+    ui_label = "Method";
+    ui_tooltip = "Downsampling Method";
+> = 0;
+
+uniform int _UpsampleMethod <
+    ui_type = "combo";
+    ui_items = " Box\0 Jorge\0 Kawase\0 None\0";
+    ui_label = "Method";
+    ui_tooltip = "Upsampling Method";
+> = 0;
+
+// Vertex shaders
+
+void PostProcessVS(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float2 TexCoord : TEXCOORD0)
+{
+    TexCoord.x = (ID == 2) ? 2.0 : 0.0;
+    TexCoord.y = (ID == 1) ? 2.0 : 0.0;
+    Position = float4(TexCoord * float2(2.0, -2.0) + float2(-1.0, 1.0), 0.0, 1.0);
+}
+
+void DownsampleVS(in uint ID, out float4 Position, out float4 TexCoord[4], float2 PixelSize)
+{
+    float2 TexCoord0;
+    PostProcessVS(ID, Position, TexCoord0);
+    // Quadrant
+    TexCoord[0] = TexCoord0.xyxy + float4(-1.0, -1.0, 1.0, 1.0) * PixelSize.xyxy;
+    // Left column
+    TexCoord[1] = TexCoord0.xyyy + float4(-2.0, 2.0, 0.0, -2.0) * PixelSize.xyyy;
+    // Center column
+    TexCoord[2] = TexCoord0.xyyy + float4(0.0, 2.0, 0.0, -2.0) * PixelSize.xyyy;
+    // Right column
+    TexCoord[3] = TexCoord0.xyyy + float4(2.0, 2.0, 0.0, -2.0) * PixelSize.xyyy;
+}
+
+void UpsampleVS(in uint ID, out float4 Position, out float4 TexCoord[3], float2 PixelSize)
+{
+    float2 TexCoord0;
+    PostProcessVS(ID, Position, TexCoord0);
+    // Left column
+    TexCoord[0] = TexCoord0.xyyy + float4(-2.0, 2.0, 0.0, -2.0) * PixelSize.xyyy;
+    // Center column
+    TexCoord[1] = TexCoord0.xyyy + float4(0.0, 2.0, 0.0, -2.0) * PixelSize.xyyy;
+    // Right column
+    TexCoord[2] = TexCoord0.xyyy + float4(2.0, 2.0, 0.0, -2.0) * PixelSize.xyyy;
+}
+
+void DownsampleVS1(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[4] : TEXCOORD0)
+{
+    DownsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_1);
+}
+
+void DownsampleVS2(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[4] : TEXCOORD0)
+{
+    DownsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_2);
+}
+
+void DownsampleVS3(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[4] : TEXCOORD0)
+{
+    DownsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_3);
+}
+
+void DownsampleVS4(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[4] : TEXCOORD0)
+{
+    DownsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_4);
+}
+
+void UpsampleVS4(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[3] : TEXCOORD0)
+{
+    UpsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_4);
+}
+
+void UpsampleVS3(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[3] : TEXCOORD0)
+{
+    UpsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_3);
+}
+
+void UpsampleVS2(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[3] : TEXCOORD0)
+{
+    UpsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_2);
+}
+
+void UpsampleVS1(in uint ID : SV_VertexID, out float4 Position : SV_Position, out float4 TexCoord[3] : TEXCOORD0)
+{
+    UpsampleVS(ID, Position, TexCoord, 1.0 / BUFFER_SIZE_1);
+}
+
+// Pixel Shaders
+// 1: https://catlikecoding.com/unity/tutorials/advanced-rendering/bloom/
+// 2: http://www.iryoku.com/next-generation-post-processing-in-call-of-duty-advanced-warfare
+// 3: https://community.arm.com/cfs-file/__key/communityserver-blogs-components-weblogfiles/00-00-00-20-66/siggraph2015_2D00_mmg_2D00_marius_2D00_slides.pdf
+// More: https://github.com/powervr-graphics/Native_SDK
+
+
+
+technique cDualFilter
+{
+
+}

shaders/cOpticalFlow.fx

@@ -120,7 +120,7 @@ namespace SharedResources
 
 namespace OpticalFlow
 {
-    //Shader properties
+    // Shader properties
 
     uniform float _Blend <
         ui_type = "slider";