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-rw-r--r--config.def.h11
-rw-r--r--image.c13
2 files changed, 18 insertions, 6 deletions
diff --git a/config.def.h b/config.def.h
index 99dd8ba..0db7a9b 100644
--- a/config.def.h
+++ b/config.def.h
@@ -32,10 +32,13 @@ static const suffixmode_t TITLE_SUFFIXMODE = SUFFIX_BASENAME;
#endif
#ifdef _IMAGE_CONFIG
-/* zoom level of 1.0 means 100% */
-static const float ZOOM_MIN = 0.01;
-static const float ZOOM_MAX = 20.0;
-static const float ZOOM_STEP = 1.2599210498948732; /* 2^(1/3) */
+/* levels (in percent) to use when zooming via '-' and '+':
+ * (first/last value is used as min/max zoom level)
+ */
+static const float zoom_levels[] = {
+ 12.5, 25.0, 50.0, 75.0,
+ 100.0, 150.0, 200.0, 400.0, 800.0
+};
/* default slideshow delay (in sec, overwritten via -S option): */
static const int SLIDESHOW_DELAY = 5;
diff --git a/image.c b/image.c
index 268163b..aab8f41 100644
--- a/image.c
+++ b/image.c
@@ -43,6 +43,9 @@ enum { DEF_GIF_DELAY = 75 };
enum { DEF_WEBP_DELAY = 75 };
#endif
+static const float ZOOM_MIN = zoom_levels[0] / 100;
+static const float ZOOM_MAX = zoom_levels[ARRLEN(zoom_levels)-1] / 100;
+
void img_init(img_t *img, win_t *win)
{
imlib_context_set_display(win->env.dpy);
@@ -699,8 +702,14 @@ bool img_zoom_to(img_t *img, float z)
bool img_zoom(img_t *img, int d)
{
- const float z = img->zoom * (d > 0 ? ZOOM_STEP : 1/ZOOM_STEP);
- return img_zoom_to(img, z);
+ int i = d > 0 ? 0 : ARRLEN(zoom_levels)-1;
+ while (i >= 0 && i < ARRLEN(zoom_levels) && (d > 0 ?
+ zoom_levels[i]/100 <= img->zoom : zoom_levels[i]/100 >= img->zoom))
+ {
+ i += d;
+ }
+ i = MIN(MAX(i, 0), ARRLEN(zoom_levels)-1);
+ return img_zoom_to(img, zoom_levels[i]/100);
}
bool img_pos(img_t *img, float x, float y)