cairo_surface_t *
_cairo_clip_get_image (const cairo_clip_t *clip,
cairo_surface_t *target,
const cairo_rectangle_int_t *extents)
{
cairo_surface_t *surface;
cairo_status_t status;
surface = cairo_surface_create_similar_image (target,
CAIRO_FORMAT_A8,
extents->width,
extents->height);
if (unlikely (surface->status))
return surface;
status = _cairo_surface_paint (surface, CAIRO_OPERATOR_SOURCE,
&_cairo_pattern_white.base, NULL);
if (likely (status == CAIRO_STATUS_SUCCESS))
status = _cairo_clip_combine_with_surface (clip, surface,
extents->x, extents->y);
if (unlikely (status)) {
cairo_surface_destroy (surface);
surface = _cairo_surface_create_in_error (status);
}
return surface;
}
static cairo_image_surface_t *
create_composite_mask (cairo_image_surface_t *dst,
void *draw_closure,
draw_func_t draw_func,
const cairo_composite_rectangles_t *extents)
{
cairo_image_surface_t *surface;
cairo_int_status_t status;
surface = (cairo_image_surface_t *)
_cairo_surface_create_similar_solid (&dst->base,
CAIRO_CONTENT_ALPHA,
extents->bounded.width,
extents->bounded.height,
CAIRO_COLOR_TRANSPARENT);
if (unlikely (surface->base.status))
return surface;
status = draw_func (surface, draw_closure,
CAIRO_OPERATOR_ADD, &_cairo_pattern_white.base,
extents->bounded.x, extents->bounded.y,
&extents->bounded);
if (unlikely (status))
goto error;
if (extents->clip->boxes) {
status = combine_in_boxes (surface,
extents->clip->boxes,
extents->clip->num_boxes,
&extents->bounded);
if (unlikely (status))
goto error;
}
if (extents->clip->path) {
status = _cairo_clip_combine_with_surface (extents->clip,
&surface->base,
extents->bounded.x,
extents->bounded.y);
if (unlikely (status))
goto error;
}
return surface;
error:
cairo_surface_destroy (&surface->base);
return (cairo_image_surface_t *)_cairo_surface_create_in_error (status);
}
static cairo_image_surface_t *
get_clip_surface (cairo_image_surface_t *dst,
const cairo_composite_rectangles_t *extents,
int *clip_x,
int *clip_y)
{
cairo_image_surface_t *surface;
cairo_int_status_t status;
surface = (cairo_image_surface_t *)
_cairo_surface_create_similar_solid (&dst->base,
CAIRO_CONTENT_ALPHA,
extents->unbounded.width,
extents->unbounded.height,
CAIRO_COLOR_WHITE);
if (unlikely (surface->base.status))
return surface;
if (extents->clip->boxes) {
status = combine_in_boxes (surface,
extents->clip->boxes,
extents->clip->num_boxes,
&extents->unbounded);
if (unlikely (status))
goto error;
}
if (extents->clip->path) {
status = _cairo_clip_combine_with_surface (extents->clip,
&surface->base,
extents->unbounded.x,
extents->unbounded.y);
if (unlikely (status))
goto error;
}
*clip_x = extents->unbounded.x;
*clip_y = extents->unbounded.y;
return surface;
error:
cairo_surface_destroy (&surface->base);
return (cairo_image_surface_t *)_cairo_surface_create_in_error (status);
}
static cairo_image_surface_t *
create_composite_mask (cairo_image_surface_t *dst,
void *draw_closure,
draw_func_t draw_func,
const cairo_composite_rectangles_t *extents)
{
cairo_image_surface_t *surface;
cairo_int_status_t status;
TRACE ((stderr, "%s\n", __FUNCTION__));
surface = (cairo_image_surface_t *)
_cairo_image_surface_create_with_pixman_format (NULL, PIXMAN_a8,
extents->bounded.width,
extents->bounded.height,
0);
if (unlikely (surface->base.status))
return surface;
status = draw_func (surface, draw_closure,
CAIRO_OPERATOR_ADD, &_cairo_pattern_white.base,
extents->bounded.x, extents->bounded.y,
&extents->bounded);
if (unlikely (status))
goto error;
status = _cairo_clip_combine_with_surface (extents->clip,
&surface->base,
extents->bounded.x,
extents->bounded.y);
if (unlikely (status))
goto error;
return surface;
error:
cairo_surface_destroy (&surface->base);
return (cairo_image_surface_t *)_cairo_surface_create_in_error (status);
}
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;
}
