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[meta] Use the pre-computed device_transform_inverse.

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Avoid repeatedly inverting the same matrix by using the pre-computed
inverse.
This commit is contained in:
Chris Wilson 2008-08-07 23:54:25 +01:00
parent 523f725801
commit f916e2178b
1 changed files with 6 additions and 10 deletions
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16
src/cairo-meta-surface.c
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@ -844,14 +844,12 @@ _cairo_meta_surface_replay_internal (cairo_surface_t *surface,
{
cairo_matrix_t dev_ctm = command->stroke.ctm;
cairo_matrix_t dev_ctm_inverse = command->stroke.ctm_inverse;
cairo_matrix_t tmp;
if (has_device_transform) {
cairo_matrix_multiply (&dev_ctm, &dev_ctm, device_transform);
tmp = surface->device_transform;
status = cairo_matrix_invert (&tmp);
assert (status == CAIRO_STATUS_SUCCESS);
cairo_matrix_multiply (&dev_ctm_inverse, &tmp, &dev_ctm_inverse);
cairo_matrix_multiply (&dev_ctm_inverse,
&surface->device_transform_inverse,
&dev_ctm_inverse);
}
status = _cairo_surface_stroke (target,
@ -885,17 +883,15 @@ _cairo_meta_surface_replay_internal (cairo_surface_t *surface,
_cairo_path_fixed_is_equal (dev_path, _cairo_command_get_path (stroke_command))) {
cairo_matrix_t dev_ctm;
cairo_matrix_t dev_ctm_inverse;
cairo_matrix_t tmp;
dev_ctm = stroke_command->stroke.ctm;
dev_ctm_inverse = stroke_command->stroke.ctm_inverse;
if (has_device_transform) {
cairo_matrix_multiply (&dev_ctm, &dev_ctm, device_transform);
tmp = surface->device_transform;
status = cairo_matrix_invert (&tmp);
assert (status == CAIRO_STATUS_SUCCESS);
cairo_matrix_multiply (&dev_ctm_inverse, &tmp, &dev_ctm_inverse);
cairo_matrix_multiply (&dev_ctm_inverse,
&surface->device_transform_inverse,
&dev_ctm_inverse);
}
status = _cairo_surface_fill_stroke (target,