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wrapper: target to recording needs the inverse transform

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Gah, I thought about this and noted that I need the inverse of the
normal transformation, yet failed to remember to actually use it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-07-26 09:03:37 +01:00
parent c596483f85
commit 168b5a5348
1 changed files with 23 additions and 2 deletions
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25
src/cairo-surface-wrapper.c
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@ -86,11 +86,32 @@ _cairo_surface_wrapper_get_transform (cairo_surface_wrapper_t *wrapper,
if (! _cairo_matrix_is_identity (&wrapper->transform))
cairo_matrix_multiply (m, &wrapper->transform, m);
if (! _cairo_matrix_is_identity (&wrapper->target->device_transform))
cairo_matrix_multiply (m, &wrapper->target->device_transform, m);
}
static void
_cairo_surface_wrapper_get_inverse_transform (cairo_surface_wrapper_t *wrapper,
cairo_matrix_t *m)
{
cairo_matrix_init_identity (m);
if (! _cairo_matrix_is_identity (&wrapper->target->device_transform_inverse))
cairo_matrix_multiply (m, &wrapper->target->device_transform_inverse, m);
if (! _cairo_matrix_is_identity (&wrapper->transform)) {
cairo_matrix_t inv;
cairo_status_t status;
inv = wrapper->transform;
status = cairo_matrix_invert (&inv);
assert (status == CAIRO_STATUS_SUCCESS);
cairo_matrix_multiply (m, &inv, m);
}
if (wrapper->has_extents && (wrapper->extents.x || wrapper->extents.y))
cairo_matrix_translate (m, wrapper->extents.x, wrapper->extents.y);
}
static cairo_clip_t *
_cairo_surface_wrapper_get_clip (cairo_surface_wrapper_t *wrapper,
@ -586,7 +607,7 @@ _cairo_surface_wrapper_get_target_extents (cairo_surface_wrapper_t *wrapper,
cairo_matrix_t m;
double x1, y1, x2, y2;
_cairo_surface_wrapper_get_transform (wrapper, &m);
_cairo_surface_wrapper_get_inverse_transform (wrapper, &m);
x1 = r->x;
y1 = r->y;