1 files changed, 51 insertions, 0 deletions

diff --git a/engine.c b/engine.c
index d9b35f7..82f1355 100644
--- a/engine.c
+++ b/engine.c
@@ -8,6 +8,7 @@
 #include "midi.h"
 
 static int g_selected_string = -1;
+static int g_normalize_mode = 0;
 
 #ifndef NO_DISPLAY
 #include "display.h"
@@ -19,6 +20,13 @@ static ConfigSelect g_selected_config;
 static void highlight_line(int value, int y, int max_x, uint32_t color);
 
 #define scale(X) display_scale_harfe_to_screen(X)
+static int64_t
+engine_normalize(int height, int y)
+{
+    int64_t yf = (y << 16) / height;
+    yf = (((yf * yf - (yf << 16)) * ((int64_t)g_normalize_factor))) + (yf << 32);
+    return (((int64_t)height) * yf) >> 32;
+}
 
 void
 engine_redraw()
@@ -28,6 +36,7 @@ engine_redraw()
     const int tos1 = g_midi_three_octave_split_1, tos2 = g_midi_three_octave_split_2;
     const int height = g_max_y - g_min_y;
     int i, x2, MAX_X, MAX_Y, FONT_HEIGHT;
+    int t1 = 0, t2 = 0, t3 = 0;
 
     display_redraw();
     display_clear();
@@ -47,6 +56,35 @@ engine_redraw()
         display_text(            " 0", 4, scale(g_min_y + (tos1 + tos2) * height / 200) + FONT_HEIGHT / 2, 0x007f7f7fff);
         display_text( b ? "-1" : "+1", 4, scale(g_min_y + (tos2 / 2 + 50 ) * height / 100) + FONT_HEIGHT / 2, 0x007f7f7fff);
 
+        for (int x=0; x<height; x+=20) {
+            int y = engine_normalize(height, x);
+            /*
+            int64_t xf = (x << 16) / 100;
+            int64_t yf = (((xf * xf - (xf << 16)) * ((int64_t)g_normalize_factor))) + (xf << 32);
+            int64_t yo = (((int64_t)height) * yf) >> 48;
+
+            double xf = ((double)x) / 100.0f;
+            double yf = g_normalize_factor * (xf*xf-xf) + xf;
+            y = ax^2 + x - ax = a * (x^2 - x) + x
+            int y = scale(g_min_y + (int)(((double)height) * yf));
+            */
+
+            display_line_color(0, scale(g_min_y + (y>>16)), MAX_X, scale(g_min_y + (y>>16)), 0x1f1f1f1f);
+            if (y >> 16 > (tos2 * height) / 100 )
+                t1++;
+            else if (y >> 16 > (tos1 * height) / 100 )
+                t2++;
+            else
+                t3++;
+        }
+
+        if (g_normalize_mode) {
+            sprintf(text, "%lf", g_normalize_factor / 65336.0f);
+            display_text(text, 8, MAX_Y - 32, 0xff003fff );
+            sprintf(text, "%d %d %d", t1, t2, t3);
+            display_text(text, 8, MAX_Y - 64, 0xff003fff );
+        }
+
         display_line_color(0, scale(g_min_y), MAX_X, scale(g_min_y), 0xff00ffff);
         display_line_color(0, scale(g_max_y), MAX_X, scale(g_max_y), 0xff00ffff);
 #ifdef HAVE_TWO_OCTAVE_MODE
@@ -146,6 +184,19 @@ engine_select_config(ConfigSelect sel) {
     g_selected_config = sel;
 }
 
+void
+engine_toggle_normalize_mode() {
+    if (g_normalize_mode)
+        g_config_source = source_edit;
+    g_normalize_mode = 1 - g_normalize_mode;
+}
+
+void
+engine_mouse_y(int y) {
+    if (g_normalize_mode)
+        g_normalize_factor = y;
+}
+
 ConfigSelect
 engine_change_selected(int off)
 {