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transform: Add transform_bounds fast path for 2D_AFFINE transforms

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E.g. anything involving a scale. This is important when e.g. scrolling
in the node list in the recorder, which scales every recorded node down
to fit in the list.
This commit is contained in:
Timm Bäder 2019-06-29 09:39:20 +02:00
parent a6a9853676
commit 3bc3e140dd
1 changed files with 16 additions and 1 deletions
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17
gsk/gsktransform.c
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@ -1690,11 +1690,26 @@ gsk_transform_transform_bounds (GskTransform *self,
}
break;
case GSK_TRANSFORM_CATEGORY_2D_AFFINE:
{
float dx, dy, scale_x, scale_y;
gsk_transform_to_affine (self, &scale_x, &scale_y, &dx, &dy);
*out_rect = *rect;
out_rect->origin.x *= scale_x;
out_rect->origin.y *= scale_y;
out_rect->size.width *= scale_x;
out_rect->size.height *= scale_y;
out_rect->origin.x += dx;
out_rect->origin.y += dy;
}
break;
case GSK_TRANSFORM_CATEGORY_UNKNOWN:
case GSK_TRANSFORM_CATEGORY_ANY:
case GSK_TRANSFORM_CATEGORY_3D:
case GSK_TRANSFORM_CATEGORY_2D:
case GSK_TRANSFORM_CATEGORY_2D_AFFINE:
default:
{
graphene_matrix_t mat;