Removed useless computations in vertex shaders used for MRT blits

Author: Chman

PostProcessing/Resources/Shaders/AmbientOcclusion.cginc

@@ -425,7 +425,7 @@ half4 FragComposition(VaryingsMultitex i) : SV_Target
 VaryingsDefault VertCompositionGBuffer(AttributesDefault v)
 {
     VaryingsDefault o;
-    o.pos = v.vertex * float4(2.0, 2.0, 0.0, 0.0) + float4(0.0, 0.0, 0.0, 1.0);
+    o.pos = v.vertex;
 #if UNITY_UV_STARTS_AT_TOP
     o.uv = v.texcoord.xy * float2(1.0, -1.0) + float2(0.0, 1.0);
 #else

PostProcessing/Resources/Shaders/MotionBlur.cginc

@@ -382,7 +382,7 @@ half4 FragReconstruction(VaryingsMultitex i) : SV_Target
 VaryingsDefault VertFrameCompress(AttributesDefault v)
 {
     VaryingsDefault o;
-    o.pos = v.vertex * float4(2.0, 2.0, 0.0, 0.0) + float4(0.0, 0.0, 0.0, 1.0);
+    o.pos = v.vertex;
     o.uvSPR = 0;
 #if UNITY_UV_STARTS_AT_TOP
     o.uv = v.texcoord * float2(1.0, -1.0) + float2(0.0, 1.0);

PostProcessing/Resources/Shaders/TAA.cginc

@@ -395,7 +395,7 @@ float4 _BlitSourceTex_TexelSize;
 VaryingsDefault VertBlit(AttributesDefault v)
 {
     VaryingsDefault o;
-    o.pos = v.vertex * float4(2.0, 2.0, 0.0, 0.0) + float4(0.0, 0.0, 0.0, 1.0);
+    o.pos = v.vertex;
 #if UNITY_UV_STARTS_AT_TOP
     o.uv = v.texcoord * float2(1.0, -1.0) + float2(0.0, 1.0);
 #else

PostProcessing/Runtime/Utils/GraphicsUtils.cs

@@ -28,10 +28,10 @@ public static Mesh quad
 
                 var vertices = new[]
                 {
-                    new Vector3(-0.5f, -0.5f, 0f),
-                    new Vector3(0.5f,  0.5f, 0f),
-                    new Vector3(0.5f, -0.5f, 0f),
-                    new Vector3(-0.5f,  0.5f, 0f)
+                    new Vector3(-1f, -1f, 0f),
+                    new Vector3( 1f,  1f, 0f),
+                    new Vector3( 1f, -1f, 0f),
+                    new Vector3(-1f,  1f, 0f)
                 };
 
                 var uvs = new[]