From fde8b7160dbc7b7e48b256c566705ba9a5080951 Mon Sep 17 00:00:00 2001
From: Laurent Mazet <mazet@softndesign.org>
Date: Fri, 4 Oct 2024 00:28:57 +0200
Subject: [PATCH] restore gamma correction

---
 display.c  |  6 ------
 image.c    |  6 ++++++
 image.h    |  2 ++
 ndisplay.c | 27 +++++++++++++++------------
 4 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/display.c b/display.c
index cc03fbc..5c7c82f 100644
--- a/display.c
+++ b/display.c
@@ -4,7 +4,6 @@
 /* doslnk: color.o debug.o image.o pnm.o -lm */
 /* winlnk: color.o debug.o image.o pnm.o -lm */
 
-#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -37,11 +36,6 @@ int usage (int ret)
     return ret;
 }
 
-float correction (float value, float factor)
-{
-    return powf (value, 1. / factor);
-}
-
 /* main function */
 int main (int argc, char *argv[])
 {
diff --git a/image.c b/image.c
index 99b6a24..7234084 100644
--- a/image.c
+++ b/image.c
@@ -1,3 +1,4 @@
+#include <math.h>
 #include <stdlib.h>
 
 #include "image.h"
@@ -34,4 +35,9 @@ int contain (char *str, char c)
     return 1;
 }
 
+float correction (float value, float factor)
+{
+    return powf (value, 1. / factor);
+}
+
 /* vim: set ts=4 sw=4 et: */
diff --git a/image.h b/image.h
index e6542aa..155bab5 100644
--- a/image.h
+++ b/image.h
@@ -18,4 +18,6 @@ void freeimage (image_t *image);
 
 int contain (char *str, char c);
 
+float correction (float value, float factor);
+
 #endif /* __IMAGE_H__ */
diff --git a/ndisplay.c b/ndisplay.c
index 6b42957..b45053d 100644
--- a/ndisplay.c
+++ b/ndisplay.c
@@ -1,8 +1,8 @@
 /* depend: */
 /* cflags: */
-/* linker: color.o debug.o image.o pnm.o -lncursesw */
-/* doslnk: color.o debug.o image.o pnm.o -lpdc~2 */
-/* winlnk: color.o debug.o image.o pnm.o -lpdcursesw */
+/* linker: color.o debug.o image.o pnm.o -lncursesw -lm */
+/* doslnk: color.o debug.o image.o pnm.o -lpdc~2 -lm */
+/* winlnk: color.o debug.o image.o pnm.o -lpdcursesw -lm */
 
 #include <curses.h>
 #include <stdio.h>
@@ -152,26 +152,29 @@ int main (int argc, char *argv[])
 
         int width = min (image->width - xcursor, COLS / mode);
         int height = min (image->height - ycursor, LINES);
+        VERBOSE (DEBUG, FILE *fd = fopen ("my.log", "a"); fprintf (fd, "(%d, %d)\n", width, height); fclose (fd));
         int x, y;
         for (y = 0; y < height; y++) {
             for (x = 0; x < width; x++) {
 
                 int ind = (x + xcursor) + image->width * (y + ycursor);
-                color_t *color = findcolor (image->red[ind], image->green[ind], image->blue[ind], colormap);
-                //color_t *color = findcolor (correction (image->red[ind], gf[0]), correction (image->green[ind], gf[1]), correction (image->blue[ind], gf[2]), colormap);
+                color_t *color = findcolor (correction (image->red[ind], gf[0]),
+                                            correction (image->green[ind], gf[1]),
+                                            correction (image->blue[ind], gf[2]), colormap);
                 attron (COLOR_PAIR (color->code));
-                
+
                 move (y, x * mode);
-                cchar_t tmp;
-                wchar_t tmp_wchar[2] = {0};
-                tmp_wchar[0] = (wchar_t) ' ';
-                setcchar (&tmp, tmp_wchar, A_NORMAL, 0, NULL);
-                add_wch (&tmp);
+                cchar_t cchar;
+                wchar_t wchar[2] = {0};
+                wchar[0] = (wchar_t) ' ';
+                setcchar (&cchar, wchar, A_NORMAL, 0, NULL);
+                add_wch (&cchar);
                 if (mode == 2) {
                     move (y, x * mode + 1);
-                    add_wch (&tmp);
+                    add_wch (&cchar);
                 }
             }
+            refresh ();
         }
         refresh ();
         attron (COLOR_PAIR (0));
-- 
2.30.2