static cairo_int_status_t
clip_and_composite_polygon (const cairo_spans_compositor_t *compositor,
cairo_composite_rectangles_t *extents,
cairo_polygon_t *polygon,
cairo_fill_rule_t fill_rule,
cairo_antialias_t antialias)
{
cairo_int_status_t status;
/* XXX simply uses polygon limits.point extemities, tessellation? */
status = trim_extents_to_polygon (extents, polygon);
if (unlikely (status))
return status;
if (_cairo_polygon_is_empty (polygon)) {
cairo_boxes_t boxes;
if (extents->is_bounded)
return CAIRO_STATUS_SUCCESS;
_cairo_boxes_init (&boxes);
extents->bounded.width = extents->bounded.height = 0;
return fixup_unbounded_boxes (compositor, extents, &boxes);
}
if (extents->is_bounded && extents->clip->path) {
cairo_polygon_t clipper;
cairo_antialias_t clip_antialias;
cairo_fill_rule_t clip_fill_rule;
status = _cairo_clip_get_polygon (extents->clip,
&clipper,
&clip_fill_rule,
&clip_antialias);
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
cairo_clip_t *old_clip;
if (clip_antialias == antialias) {
/* refresh limits after trimming extents */
_cairo_polygon_limit_to_clip(polygon, extents->clip);
status = _cairo_polygon_intersect (polygon, fill_rule,
&clipper, clip_fill_rule);
_cairo_polygon_fini (&clipper);
if (unlikely (status))
return status;
old_clip = extents->clip;
extents->clip = _cairo_clip_copy_region (extents->clip);
_cairo_clip_destroy (old_clip);
} else {
_cairo_polygon_fini (&clipper);
}
}
}
return composite_polygon (compositor, extents,
polygon, fill_rule, antialias);
}
cairo_surface_t *
_cairo_clip_get_surface (const cairo_clip_t *clip,
cairo_surface_t *target,
int *tx, int *ty)
{
cairo_surface_t *surface;
cairo_status_t status;
cairo_clip_t *copy, *region;
cairo_clip_path_t *copy_path, *clip_path;
if (clip->num_boxes) {
cairo_path_fixed_t path;
int i;
surface = _cairo_surface_create_scratch (target,
CAIRO_CONTENT_ALPHA,
clip->extents.width,
clip->extents.height,
CAIRO_COLOR_TRANSPARENT);
if (unlikely (surface->status))
return surface;
_cairo_path_fixed_init (&path);
status = CAIRO_STATUS_SUCCESS;
for (i = 0; status == CAIRO_STATUS_SUCCESS && i < clip->num_boxes; i++) {
status = _cairo_path_fixed_add_box (&path, &clip->boxes[i],
-_cairo_fixed_from_int (clip->extents.x),
-_cairo_fixed_from_int (clip->extents.y));
}
if (status == CAIRO_STATUS_SUCCESS)
status = _cairo_surface_fill (surface,
CAIRO_OPERATOR_ADD,
&_cairo_pattern_white.base,
&path,
CAIRO_FILL_RULE_WINDING,
1.,
CAIRO_ANTIALIAS_DEFAULT,
NULL);
_cairo_path_fixed_fini (&path);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return _cairo_surface_create_in_error (status);
}
} else {
surface = _cairo_surface_create_scratch (target,
CAIRO_CONTENT_ALPHA,
clip->extents.width,
clip->extents.height,
CAIRO_COLOR_WHITE);
if (unlikely (surface->status))
return surface;
}
copy = _cairo_clip_copy_with_translation (clip,
-clip->extents.x,
-clip->extents.y);
copy_path = copy->path;
copy->path = NULL;
region = copy;
if (! _cairo_clip_is_region (copy))
region = _cairo_clip_copy_region (copy);
status = CAIRO_STATUS_SUCCESS;
clip_path = copy_path;
while (status == CAIRO_STATUS_SUCCESS && clip_path) {
status = _cairo_surface_fill (surface,
CAIRO_OPERATOR_IN,
&_cairo_pattern_white.base,
&clip_path->path,
clip_path->fill_rule,
clip_path->tolerance,
clip_path->antialias,
region);
clip_path = clip_path->prev;
}
copy->path = copy_path;
_cairo_clip_destroy (copy);
if (region != copy)
_cairo_clip_destroy (region);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return _cairo_surface_create_in_error (status);
}
*tx = clip->extents.x;
*ty = clip->extents.y;
return surface;
}
static cairo_int_status_t
_cairo_shape_mask_compositor_stroke (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias)
{
cairo_surface_t *mask;
cairo_surface_pattern_t pattern;
cairo_int_status_t status;
cairo_clip_t *clip;
if (! extents->is_bounded)
return CAIRO_INT_STATUS_UNSUPPORTED;
TRACE ((stderr, "%s\n", __FUNCTION__));
mask = _cairo_surface_create_scratch (extents->surface,
CAIRO_CONTENT_ALPHA,
extents->bounded.width,
extents->bounded.height,
NULL);
if (unlikely (mask->status))
return mask->status;
clip = extents->clip;
if (! _cairo_clip_is_region (clip))
clip = _cairo_clip_copy_region (clip);
if (! mask->is_clear) {
status = _cairo_surface_offset_paint (mask,
extents->bounded.x,
extents->bounded.y,
CAIRO_OPERATOR_CLEAR,
&_cairo_pattern_clear.base,
clip);
if (unlikely (status))
goto error;
}
status = _cairo_surface_offset_stroke (mask,
extents->bounded.x,
extents->bounded.y,
CAIRO_OPERATOR_ADD,
&_cairo_pattern_white.base,
path, style, ctm, ctm_inverse,
tolerance, antialias,
clip);
if (unlikely (status))
goto error;
if (clip != extents->clip) {
status = _cairo_clip_combine_with_surface (extents->clip, mask,
extents->bounded.x,
extents->bounded.y);
if (unlikely (status))
goto error;
}
_cairo_pattern_init_for_surface (&pattern, mask);
cairo_matrix_init_translate (&pattern.base.matrix,
-extents->bounded.x,
-extents->bounded.y);
pattern.base.filter = CAIRO_FILTER_NEAREST;
pattern.base.extend = CAIRO_EXTEND_NONE;
if (extents->op == CAIRO_OPERATOR_SOURCE) {
status = _cairo_surface_mask (extents->surface,
CAIRO_OPERATOR_DEST_OUT,
&_cairo_pattern_white.base,
&pattern.base,
clip);
if ((status == CAIRO_INT_STATUS_SUCCESS)) {
status = _cairo_surface_mask (extents->surface,
CAIRO_OPERATOR_ADD,
&extents->source_pattern.base,
&pattern.base,
clip);
}
} else {
status = _cairo_surface_mask (extents->surface,
extents->op,
&extents->source_pattern.base,
&pattern.base,
clip);
}
_cairo_pattern_fini (&pattern.base);
error:
cairo_surface_destroy (mask);
if (clip != extents->clip)
_cairo_clip_destroy (clip);
return status;
}
static cairo_int_status_t
clip_and_composite_polygon (const cairo_spans_compositor_t *compositor,
cairo_composite_rectangles_t *extents,
cairo_polygon_t *polygon,
cairo_fill_rule_t fill_rule,
cairo_antialias_t antialias)
{
cairo_int_status_t status;
TRACE ((stderr, "%s\n", __FUNCTION__));
/* XXX simply uses polygon limits.point extemities, tessellation? */
status = trim_extents_to_polygon (extents, polygon);
if (unlikely (status))
return status;
if (_cairo_polygon_is_empty (polygon)) {
cairo_boxes_t boxes;
if (extents->is_bounded)
return CAIRO_STATUS_SUCCESS;
_cairo_boxes_init (&boxes);
extents->bounded.width = extents->bounded.height = 0;
return fixup_unbounded_boxes (compositor, extents, &boxes);
}
if (extents->is_bounded && extents->clip->path) {
cairo_polygon_t clipper;
cairo_antialias_t clip_antialias;
cairo_fill_rule_t clip_fill_rule;
TRACE((stderr, "%s - combining shape with clip polygon\n",
__FUNCTION__));
status = _cairo_clip_get_polygon (extents->clip,
&clipper,
&clip_fill_rule,
&clip_antialias);
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
cairo_clip_t *old_clip;
if (clip_antialias == antialias) {
status = _cairo_polygon_intersect (polygon, fill_rule,
&clipper, clip_fill_rule);
_cairo_polygon_fini (&clipper);
if (unlikely (status))
return status;
old_clip = extents->clip;
extents->clip = _cairo_clip_copy_region (extents->clip);
_cairo_clip_destroy (old_clip);
status = trim_extents_to_polygon (extents, polygon);
if (unlikely (status))
return status;
fill_rule = CAIRO_FILL_RULE_WINDING;
} else {
_cairo_polygon_fini (&clipper);
}
}
}
return composite_polygon (compositor, extents,
polygon, fill_rule, antialias);
}