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clutter-stage-cogl: Fix uninitialized variable use_clipped_redraw

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I noticed my system would fall back to the slow unclipped (and
uncullable) paint path whenever a window touched the left edge of
the screen. Turns out that was a red herring. Just that
`use_clipped_redraw` was uninitialized so clipping/culling was used
randomly.

So the compiler failed to notice `use_clipped_redraw` was uninitialized.
Weirdly, as soon as you fix that it starts complaining that `buffer_age`
might be uninitialized, which appears to be wrong. So we initialize that
too, to shut up the compiler warnings/errors.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1323
This commit is contained in:
Daniel van Vugt 2020-06-19 15:34:59 +08:00 committed by Jonas Ådahl
parent 3187fe8ebc
commit f511f94aa2
1 changed files with 2 additions and 2 deletions
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4
clutter/clutter/cogl/clutter-stage-cogl.c
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@ -551,7 +551,7 @@ clutter_stage_cogl_redraw_view (ClutterStageWindow *stage_window,
CoglFramebuffer *onscreen = clutter_stage_view_get_onscreen (view);
cairo_rectangle_int_t view_rect;
gboolean is_full_redraw;
gboolean use_clipped_redraw;
gboolean use_clipped_redraw = TRUE;
gboolean can_blit_sub_buffer;
gboolean has_buffer_age;
gboolean swap_with_damage;
@ -561,7 +561,7 @@ clutter_stage_cogl_redraw_view (ClutterStageWindow *stage_window,
cairo_region_t *swap_region;
float fb_scale;
int fb_width, fb_height;
int buffer_age;
int buffer_age = 0;
gboolean res;
clutter_stage_view_get_layout (view, &view_rect);