Fix off by one error in hline and vline (tuupola#110)

CHiPs44 · Mar 30, 2023 · 8ba637d · 8ba637d
1 parent 915f69b
commit 8ba637d
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/hagl_bitmap.c b/src/hagl_bitmap.c
@@ -62,7 +62,7 @@ hline(void *_bitmap, int16_t x0, int16_t y0, uint16_t width, hagl_color_t color)
 {
     hagl_bitmap_t *bitmap = _bitmap;
 
-    hagl_color_t *ptr = (hagl_color_t *) (bitmap->buffer + bitmap->pitch * y0 + (bitmap->depth * x0 / 8));
+    hagl_color_t *ptr = (hagl_color_t *) (bitmap->buffer + bitmap->pitch * y0 + (bitmap->depth / 8) * x0);
     for (uint16_t x = 0; x < width; x++) {
         *ptr++ = color;
     }
@@ -73,7 +73,7 @@ vline(void *_bitmap, int16_t x0, int16_t y0, uint16_t height, hagl_color_t color
 {
     hagl_bitmap_t *bitmap = _bitmap;
 
-    hagl_color_t *ptr = (hagl_color_t *) (bitmap->buffer + bitmap->pitch * y0 + (bitmap->depth * x0 / 8));
+    hagl_color_t *ptr = (hagl_color_t *) (bitmap->buffer + bitmap->pitch * y0 + (bitmap->depth / 8) * x0);
     for (uint16_t y = 0; y < height; y++) {
         *ptr = color;
         ptr += bitmap->pitch / bitmap->depth / 8;