From f87c70af2b3b772e9915c366e641cdb0cc64b510 Mon Sep 17 00:00:00 2001
From: Jarcode <wacossusca34@gmail.com>
Date: Tue, 5 Feb 2019 17:45:17 -0800
Subject: [PATCH] Disable second 'graph' pass if nessecary (& other
 formatting), see #97

---
 render.c             | 48 ++++++++++++++++++++++----------------------
 shaders/graph/2.frag |  4 ++++
 2 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/render.c b/render.c
index b6e6931..18eb5ab 100644
--- a/render.c
+++ b/render.c
@@ -639,48 +639,48 @@ void transform_fft(struct gl_data* d, void** _, void* in) {
     float wtemp, wr, wpr, wpi, wi, theta;
     float tempr, tempi;
  
-    // reverse-binary reindexing
-    n = nn<<1;
-    j=1;
-    for (i=1; i<n; i+=2) {
-        if (j>i) {
+    /* reverse-binary reindexing */
+    n = nn << 1;
+    j = 1;
+    for (i = 1; i < n; i += 2) {
+        if (j > i) {
             swap(data[j-1], data[i-1]);
             swap(data[j], data[i]);
         }
         m = nn;
-        while (m>=2 && j>m) {
+        while (m >= 2 && j > m) {
             j -= m;
             m >>= 1;
         }
         j += m;
     };
  
-    // here begins the Danielson-Lanczos section
-    mmax=2;
-    while (n>mmax) {
-        istep = mmax<<1;
-        theta = -(2*M_PI/mmax);
-        wtemp = sin(0.5*theta);
-        wpr = -2.0*wtemp*wtemp;
+    /* here begins the Danielson-Lanczos section */
+    mmax = 2;
+    while (n > mmax) {
+        istep = mmax << 1;
+        theta = -(2 * M_PI / mmax);
+        wtemp = sin(0.5 * theta);
+        wpr = -2.0 * wtemp * wtemp;
         wpi = sin(theta);
         wr = 1.0;
         wi = 0.0;
-        for (m=1; m < mmax; m += 2) {
-            for (i=m; i <= n; i += istep) {
-                j=i+mmax;
-                tempr = wr*data[j-1] - wi*data[j];
-                tempi = wr * data[j] + wi*data[j-1];
+        for (m = 1; m < mmax; m += 2) {
+            for (i = m; i <= n; i += istep) {
+                j= i + mmax;
+                tempr = wr * data[j-1] - wi * data[j];
+                tempi = wr * data[j]   + wi * data[j-1];
  
                 data[j-1] = data[i-1] - tempr;
-                data[j] = data[i] - tempi;
+                data[j]   = data[i]   - tempi;
                 data[i-1] += tempr;
-                data[i] += tempi;
+                data[i]   += tempi;
             }
-            wtemp=wr;
-            wr += wr*wpr - wi*wpi;
-            wi += wi*wpr + wtemp*wpi;
+            wtemp = wr;
+            wr += wr * wpr - wi * wpi;
+            wi += wi * wpr + wtemp * wpi;
         }
-        mmax=istep;
+        mmax = istep;
     }
     
     /* abs and log scale */
diff --git a/shaders/graph/2.frag b/shaders/graph/2.frag
index 36d323b..ff18445 100644
--- a/shaders/graph/2.frag
+++ b/shaders/graph/2.frag
@@ -9,6 +9,10 @@ out vec4 fragment; /* output */
 #include "@graph.glsl"
 #include ":graph.glsl"
 
+#if DRAW_OUTLINE == 0 && DRAW_HIGHLIGHT == 0
+#error __disablestage
+#endif
+
 void main() {
     fragment = texelFetch(tex, ivec2(gl_FragCoord.x, gl_FragCoord.y), 0);