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Add gsk_matrix_transform_rect

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This is a projecting version of the corresponding
graphene api. While we are at it, rewrite
gsk_matrix_transform_bounds() to use
gsk_matrix_transform_rect().
This commit is contained in:
Matthias Clasen 2020-09-04 12:51:11 -04:00
parent bb2a0e69f4
commit 41497aeb8b
2 changed files with 17 additions and 14 deletions
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27
gsk/gsktransform.c
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@ -2204,13 +2204,11 @@ gsk_matrix_transform_point3d (const graphene_matrix_t *m,
}
void
gsk_matrix_transform_bounds (const graphene_matrix_t *m,
const graphene_rect_t *r,
graphene_rect_t *res)
gsk_matrix_transform_rect (const graphene_matrix_t *m,
const graphene_rect_t *r,
graphene_quad_t *res)
{
graphene_point_t ret[4];
float min_x, min_y;
float max_x, max_y;
graphene_rect_t rr;
graphene_rect_normalize_r (r, &rr);
@ -2233,12 +2231,15 @@ gsk_matrix_transform_bounds (const graphene_matrix_t *m,
#undef TRANSFORM_POINT
/* FIXME: graphene doesn't export a fast way to do this */
min_x = MIN (MIN (ret[0].x, ret[1].x), MIN (ret[2].x, ret[3].x));
min_y = MIN (MIN (ret[0].y, ret[1].y), MIN (ret[2].y, ret[3].y));
max_x = MAX (MAX (ret[0].x, ret[1].x), MAX (ret[2].x, ret[3].x));
max_y = MAX (MAX (ret[0].y, ret[1].y), MAX (ret[2].y, ret[3].y));
graphene_rect_init (res, min_x, min_y, max_x - min_x, max_y - min_y);
graphene_quad_init (res, &ret[0], &ret[1], &ret[2], &ret[3]);
}
void
gsk_matrix_transform_bounds (const graphene_matrix_t *m,
const graphene_rect_t *r,
graphene_rect_t *res)
{
graphene_quad_t q;
gsk_matrix_transform_rect (m, r, &q);
graphene_quad_bounds (&q, res);
}

4
gsk/gsktransformprivate.h
View File

@ -41,7 +41,9 @@ void gsk_matrix_transform_point3d (const graphene_matrix_t *m,
void gsk_matrix_transform_bounds (const graphene_matrix_t *m,
const graphene_rect_t *r,
graphene_rect_t *res);
void gsk_matrix_transform_rect (const graphene_matrix_t *m,
const graphene_rect_t *r,
graphene_quad_t *res);
G_END_DECLS