Cleanup notes

Signed-off-by: Andrew Opalach <andrew@akon.city>

1 files changed, 87 insertions, 0 deletions

diff --git a/Shaders/fxaa_max_quality.hlsl b/Shaders/fxaa_max_quality.hlsl
index e122754..d7bb253 100644
--- a/Shaders/fxaa_max_quality.hlsl
+++ b/Shaders/fxaa_max_quality.hlsl
@@ -1,3 +1,8 @@
+// https://web.archive.org/web/20120121124756/https://docs.google.com/leaf?id=0B2manFVVrzQAOWUwODM1YmQtNmEwOC00ZDBlLThlYzMtYzE4ZDM1ZjRlMzMx&hl=en_US
+// https://gist.githubusercontent.com/kosua20/0c506b81b3812ac900048059d2383126/raw/9c1f4b97ea5a2ac4bf632fff509f64d7dff0e96a/gistfile1.txt
+// Both sources identical and contain this final patch.
+// https://web.archive.org/web/20120121124756/http://timothylottes.blogspot.com/2011/08/fxaa-311-bug-fixes-for-360.html
+
 #define FXAA_PC 1
 #define FXAA_HLSL_5 1
 #define FXAA_QUALITY__PRESET 39
@@ -2050,6 +2055,87 @@ half4 FxaaPixelShader(
 /*==========================================================================*/
 #endif
 
+// https://github.com/Mortalitas/GShade/blob/345b45dda62ccb2070c096b9982fdfbc90280fc6/Shaders/NFAA.fx
+// Edited for readability. Just a test, worse than FXAA.
+
+#define AA_Adjust 16
+#define View_Mode 0
+#define Mask_Adjust 1.0
+
+float4 NFAAGetBB(SamplerState smpl, Texture2D tex, float2 texcoord : TEXCOORD)
+{
+    return tex.SampleLevel(smpl, texcoord, 0.0);
+}
+
+float4 NFAAOut(float4 position : SV_Position, float2 texcoord : TEXCOORD, SamplerState smpl, Texture2D tex, float2 pix) : SV_Target
+{
+    float4 NFAA; // The Edge Seeking code can be adjusted to look for longer edges.
+    float2 UV = texcoord.xy; // But, I don't think it's really needed.
+    float2 SW = pix;
+    float2 n;
+    float t, l, r, d;
+    // Find Edges.
+    t = NFAAGetBB( smpl, tex, float2( UV.x, UV.y - SW.y ) ).a;
+    d = NFAAGetBB( smpl, tex, float2( UV.x, UV.y + SW.y ) ).a;
+    l = NFAAGetBB( smpl, tex, float2( UV.x - SW.x, UV.y ) ).a;
+    r = NFAAGetBB( smpl, tex, float2( UV.x + SW.x, UV.y ) ).a;
+    n = float2(t - d, -(r - l));
+    // I should have made rep adjustable. But, I didn't see the need.
+    // Since my goal was to make this AA fast cheap and simple.
+    float nl = length(n), Rep = rcp(AA_Adjust);
+
+    if (View_Mode == 3)
+    {
+        Rep = rcp(128);
+    }
+    // Seek aliasing and apply AA. Think of this as basicly blur control.
+    if (nl < Rep)
+    {
+        NFAA = NFAAGetBB( smpl, tex,UV);
+    }
+    else
+    {
+        n *= pix / (nl * 0.5);
+
+        const float4 o = NFAAGetBB( smpl, tex, UV ),
+            t0 = NFAAGetBB( smpl, tex, UV + float2(n.x, -n.y)  * 0.5) * 0.9,
+            t1 = NFAAGetBB( smpl, tex, UV - float2(n.x, -n.y)  * 0.5) * 0.9,
+            t2 = NFAAGetBB( smpl, tex, UV + n * 0.9) * 0.75,
+            t3 = NFAAGetBB( smpl, tex, UV - n * 0.9) * 0.75;
+
+        NFAA = (o + t0 + t1 + t2 + t3) / 4.3;
+    }
+    // Lets make that mask for a sharper image.
+    float Mask = nl*(2.5 * Mask_Adjust);
+
+    if (Mask > 0.025)
+    {
+        Mask = 1-Mask;
+    }
+    else
+    {
+        Mask = 1;
+    }
+    // Super Evil Magic Number.
+    Mask = saturate(lerp(Mask, 1, -1));
+
+    // Final color.
+    if (View_Mode == 0)
+    {
+        NFAA = lerp(NFAA, NFAAGetBB( smpl, tex, texcoord.xy ), Mask);
+    }
+    else if (View_Mode == 1)
+    {
+        NFAA = Mask;
+    }
+    else if (View_Mode == 2)
+    {
+        NFAA = float4(-float2(-(r - l), -(t - d)) * 0.5 + 0.5, 1, 1.0);
+    }
+
+    return NFAA;
+}
+
 // ---- Created with 3Dmigoto v1.4.9 on Wed Feb 25 15:30:06 2026
 
 cbuffer CBScreen : register(b1)
@@ -2092,6 +2178,7 @@ void main(
     float4 v2 : Color0,
     out float4 o0 : SV_Target0)
 {
+    //o0 = NFAAOut(v0, v1, SSFilter, tBaseMap, fScreenInverseSize);
     FxaaTex tex;
     tex.smpl = SSFilter;
     tex.tex = tBaseMap;