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Approximate dash patterns in gstate

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Since approximation is only done when the pattern is sub-tolerance,
it is acceptable to apply it even for vector backends.
By doing it once and for all backends, backends are guaranteed to have
non-degenerate input.
Acked-by: Adrian Johnson <ajohnson@redneon.com>
This commit is contained in:
Andrea Canciani 2010-01-15 15:46:20 +01:00
parent 67f666896c
commit 2e91648bcb
1 changed files with 12 additions and 1 deletions
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13
src/cairo-gstate.c
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@ -1113,6 +1113,8 @@ cairo_status_t
_cairo_gstate_stroke (cairo_gstate_t *gstate, cairo_path_fixed_t *path)
{
cairo_pattern_union_t source_pattern;
cairo_stroke_style_t style;
double dash[2];
cairo_clip_t clip;
cairo_status_t status;
@ -1128,13 +1130,22 @@ _cairo_gstate_stroke (cairo_gstate_t *gstate, cairo_path_fixed_t *path)
if (_clipped (gstate))
return CAIRO_STATUS_SUCCESS;
memcpy (&style, &gstate->stroke_style, sizeof (gstate->stroke_style));
if (_cairo_stroke_style_dash_can_approximate (&gstate->stroke_style, &gstate->ctm, gstate->tolerance)) {
style.dash = dash;
_cairo_stroke_style_dash_approximate (&gstate->stroke_style, &gstate->ctm, gstate->tolerance,
&style.dash_offset,
style.dash,
&style.num_dashes);
}
_cairo_gstate_copy_transformed_source (gstate, &source_pattern.base);
status = _cairo_surface_stroke (gstate->target,
_reduce_op (gstate, &source_pattern),
&source_pattern.base,
path,
&gstate->stroke_style,
&style,
&gstate->ctm,
&gstate->ctm_inverse,
gstate->tolerance,