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gsk: Normalize when transforming bounds

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Bounds are assumed to be normalized, and transforms
with negative scales or 3d rotations can make us get
negative sizes.

Fix by Benjamin Otte.
This commit is contained in:
Matthias Clasen 2020-09-28 11:23:51 -04:00
parent 8487e82133
commit 431f144f37
1 changed files with 10 additions and 8 deletions
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18
gsk/gsktransform.c
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@ -1793,10 +1793,11 @@ gsk_transform_transform_bounds (GskTransform *self,
float dx, dy;
gsk_transform_to_translate (self, &dx, &dy);
out_rect->origin.x = rect->origin.x + dx;
out_rect->origin.y = rect->origin.y + dy;
out_rect->size.width = rect->size.width;
out_rect->size.height = rect->size.height;
graphene_rect_init (out_rect,
rect->origin.x + dx,
rect->origin.y + dy,
rect->size.width,
rect->size.height);
}
break;
@ -1806,10 +1807,11 @@ gsk_transform_transform_bounds (GskTransform *self,
gsk_transform_to_affine (self, &scale_x, &scale_y, &dx, &dy);
out_rect->origin.x = (rect->origin.x * scale_x) + dx;
out_rect->origin.y = (rect->origin.y * scale_y) + dy;
out_rect->size.width = rect->size.width * scale_x;
out_rect->size.height = rect->size.height * scale_y;
graphene_rect_init (out_rect,
(rect->origin.x * scale_x) + dx,
(rect->origin.y * scale_y) + dy,
rect->size.width * scale_x,
rect->size.height * scale_y);
}
break;