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Fix implicit conversion of floats to ints in calls to pixman_region32_contains_point

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I do not think the conversion is specifically defined, but on my system and SirCmpwn's
the floats are rounded instead of floored, which is incorrect in this case, since
for a range from 0 to 256, any value greater or equal to 0 and less than 256 is valid.
I.e. [0;256[, or 0 <= x < 256, but if x is e.g. -0.1, then it will be rounded to 0, which
is invalid. The correct behavior would be to floor to -1.
This commit is contained in:
Las 2018-09-18 13:05:44 +02:00
parent fa2e6e7d9d
commit afa2e399aa
3 changed files with 5 additions and 5 deletions
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6
rootston/cursor.c
View file

@ -381,7 +381,7 @@ void roots_cursor_handle_motion_absolute(struct roots_cursor *cursor,
if (cursor->active_constraint && if (cursor->active_constraint &&
!pixman_region32_contains_point(&cursor->confine, !pixman_region32_contains_point(&cursor->confine,
lx - view->x, ly - view->y, NULL)) { floor(lx - view->x), floor(ly - view->y), NULL)) {
return; return;
} }
} }
@ -501,7 +501,7 @@ void roots_cursor_handle_tool_axis(struct roots_cursor *cursor,
if (cursor->active_constraint && if (cursor->active_constraint &&
!pixman_region32_contains_point(&cursor->confine, !pixman_region32_contains_point(&cursor->confine,
lx - view->x, ly - view->y, NULL)) { floor(lx - view->x), floor(ly - view->y), NULL)) {
return; return;
} }
} }
@ -602,7 +602,7 @@ void roots_cursor_constrain(struct roots_cursor *cursor,
pixman_region32_t *region = &constraint->region; pixman_region32_t *region = &constraint->region;
if (!pixman_region32_contains_point(region, sx, sy, NULL)) { if (!pixman_region32_contains_point(region, floor(sx), floor(sy), NULL)) {
// Warp into region if possible // Warp into region if possible
int nboxes; int nboxes;
pixman_box32_t *boxes = pixman_region32_rectangles(region, &nboxes); pixman_box32_t *boxes = pixman_region32_rectangles(region, &nboxes);

2
types/wlr_surface.c
View file

@ -943,7 +943,7 @@ bool wlr_surface_point_accepts_input(struct wlr_surface *surface,
double sx, double sy) { double sx, double sy) {
return sx >= 0 && sx < surface->current.width && return sx >= 0 && sx < surface->current.width &&
sy >= 0 && sy < surface->current.height && sy >= 0 && sy < surface->current.height &&
pixman_region32_contains_point(&surface->current.input, sx, sy, NULL); pixman_region32_contains_point(&surface->current.input, floor(sx), floor(sy), NULL);
} }
struct wlr_surface *wlr_surface_surface_at(struct wlr_surface *surface, struct wlr_surface *wlr_surface_surface_at(struct wlr_surface *surface,

2
util/region.c
View file

@ -241,7 +241,7 @@ static void region_confine(pixman_region32_t *region, double x1, double y1, doub
bool wlr_region_confine(pixman_region32_t *region, double x1, double y1, double x2, bool wlr_region_confine(pixman_region32_t *region, double x1, double y1, double x2,
double y2, double *x2_out, double *y2_out) { double y2, double *x2_out, double *y2_out) {
pixman_box32_t box; pixman_box32_t box;
if (pixman_region32_contains_point(region, x1, y1, &box)) { if (pixman_region32_contains_point(region, floor(x1), floor(y1), &box)) {
region_confine(region, x1, y1, x2, y2, x2_out, y2_out, box); region_confine(region, x1, y1, x2, y2, x2_out, y2_out, box);
return true; return true;
} else { } else {