Use zoom steps instead of hard-coding levels (#92)

Co-authored-by: NRK <nrk@disroot.org>
Co-authored-by: Berke Kocaoğlu <berke.kocaoglu@metu.edu.tr>

1 files changed, 5 insertions, 3 deletions

diff --git a/nsxiv.h b/nsxiv.h
index be7ffe6..c148b24 100644
--- a/nsxiv.h
+++ b/nsxiv.h
@@ -39,6 +39,9 @@
 #ifndef MAX
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
 #endif
+#ifndef ABS
+#define ABS(a) ((a) > 0 ? (a) : -(a))
+#endif
 
 #define ARRLEN(a) (sizeof(a) / sizeof((a)[0]))
 
@@ -246,9 +249,8 @@ bool img_load(img_t*, const fileinfo_t*);
 CLEANUP void img_close(img_t*, bool);
 void img_render(img_t*);
 bool img_fit_win(img_t*, scalemode_t);
-bool img_zoom(img_t*, float);
-bool img_zoom_in(img_t*);
-bool img_zoom_out(img_t*);
+bool img_zoom(img_t*, int);
+bool img_zoom_to(img_t*, float);
 bool img_pos(img_t*, float, float);
 bool img_move(img_t*, float, float);
 bool img_pan(img_t*, direction_t, int);