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Remove potential division by 0 in gfxmenu.

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Vladimir Serbinenko 2015-01-21 15:56:53 +01:00
parent 44b38e4988
commit 6866f2ba37
4 changed files with 61 additions and 46 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2015-01-20 Vladimir Serbinenko <phcoder@gmail.com>
Remove potential division by 0 in gfxmenu.
2015-01-20 Vladimir Serbinenko <phcoder@gmail.com> 2015-01-20 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/normal/menu_text.c (grub_menu_init_page): Avoid * grub-core/normal/menu_text.c (grub_menu_init_page): Avoid

4
grub-core/gfxmenu/gui_circular_progress.c
View file

@ -138,6 +138,8 @@ circprog_paint (void *vself, const grub_video_rect_t *region)
(height - center_height) / 2, 0, 0, (height - center_height) / 2, 0, 0,
center_width, center_height); center_width, center_height);
if (self->num_ticks)
{
int radius = grub_min (height, width) / 2 - grub_max (tick_height, tick_width) / 2 - 1; int radius = grub_min (height, width) / 2 - grub_max (tick_height, tick_width) / 2 - 1;
unsigned nticks; unsigned nticks;
unsigned tick_begin; unsigned tick_begin;
@ -182,7 +184,7 @@ circprog_paint (void *vself, const grub_video_rect_t *region)
grub_video_blit_bitmap (self->tick_bitmap, GRUB_VIDEO_BLIT_BLEND, grub_video_blit_bitmap (self->tick_bitmap, GRUB_VIDEO_BLIT_BLEND,
x, y, 0, 0, tick_width, tick_height); x, y, 0, 0, tick_width, tick_height);
} }
}
grub_gui_restore_viewport (&vpsave); grub_gui_restore_viewport (&vpsave);
} }

3
grub-core/gfxmenu/gui_list.c
View file

@ -131,6 +131,9 @@ get_num_shown_items (list_impl_t self)
int max_top_pad = grub_max (item_top_pad, sel_top_pad); int max_top_pad = grub_max (item_top_pad, sel_top_pad);
int max_bottom_pad = grub_max (item_bottom_pad, sel_bottom_pad); int max_bottom_pad = grub_max (item_bottom_pad, sel_bottom_pad);
if (item_height + item_vspace <= 0)
return 1;
return (self->bounds.height + item_vspace - 2 * boxpad return (self->bounds.height + item_vspace - 2 * boxpad
- max_top_pad - max_bottom_pad - max_top_pad - max_bottom_pad
- box_top_pad - box_bottom_pad) / (item_height + item_vspace); - box_top_pad - box_bottom_pad) / (item_height + item_vspace);

8
grub-core/gfxmenu/gui_progress_bar.c
View file

@ -118,7 +118,13 @@ draw_filled_rect_bar (grub_gui_progress_bar_t self)
f.width + 2, f.height + 2); f.width + 2, f.height + 2);
/* Bar background. */ /* Bar background. */
int barwidth = (f.width unsigned barwidth;
if (self->end <= self->start
|| self->value <= self->start)
barwidth = 0;
else
barwidth = (f.width
* (self->value - self->start) * (self->value - self->start)
/ (self->end - self->start)); / (self->end - self->start));
grub_video_fill_rect (grub_video_map_rgba_color (self->bg_color), grub_video_fill_rect (grub_video_map_rgba_color (self->bg_color),