cairo_int_status_t
_cairo_composite_rectangles_init_for_fill (cairo_composite_rectangles_t *extents,
cairo_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
const cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface, op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_path_fixed_approximate_fill_extents (path, &extents->mask);
return _cairo_composite_rectangles_intersect (extents, clip);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_glyphs (cairo_composite_rectangles_t *extents,
cairo_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
const cairo_clip_t *clip,
cairo_bool_t *overlap)
{
cairo_status_t status;
if (! _cairo_composite_rectangles_init (extents, surface, op, source, clip))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
/* Computing the exact bbox and the overlap is expensive.
* First perform a cheap test to see if the glyphs are all clipped out.
*/
if (extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK &&
_cairo_scaled_font_glyph_approximate_extents (scaled_font,
glyphs, num_glyphs,
&extents->mask))
{
if (! _cairo_rectangle_intersect (&extents->bounded, &extents->mask))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
glyphs, num_glyphs,
&extents->mask,
overlap);
if (unlikely (status))
return status;
if (overlap && *overlap &&
scaled_font->options.antialias == CAIRO_ANTIALIAS_NONE &&
_cairo_pattern_is_opaque_solid (&extents->source_pattern.base))
{
*overlap = FALSE;
}
return _cairo_composite_rectangles_intersect (extents, clip);
}
cairo_int_status_t
_cairo_composite_rectangles_lazy_init_for_mask (cairo_composite_rectangles_t *extents,
cairo_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_clip_t *clip)
{
cairo_bool_t ret;
cairo_bool_t should_be_lazy = (op == CAIRO_OPERATOR_SOURCE) ? FALSE : TRUE;
if (! _cairo_composite_rectangles_init (extents,
surface, op, source, clip,
&should_be_lazy))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
extents->original_mask_pattern = mask;
if (! should_be_lazy) {
_cairo_composite_reduce_pattern (mask, &extents->mask_pattern);
_cairo_pattern_get_extents (&extents->mask_pattern.base,
&extents->mask);
return _cairo_composite_rectangles_intersect (extents, clip);
}
_cairo_pattern_get_extents (extents->original_mask_pattern,
&extents->mask);
ret = _cairo_rectangle_intersect (&extents->bounded, &extents->mask);
if (! ret && extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK)
return CAIRO_INT_STATUS_NOTHING_TO_DO;
if (extents->is_bounded == (CAIRO_OPERATOR_BOUND_BY_MASK | CAIRO_OPERATOR_BOUND_BY_SOURCE))
extents->unbounded = extents->bounded;
else if ((extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK) &&
(!_cairo_rectangle_intersect (&extents->unbounded, &extents->mask)))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
extents->clip = _cairo_clip_copy (clip);
return CAIRO_INT_STATUS_SUCCESS;
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_polygon (cairo_composite_rectangles_t *extents,
cairo_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_polygon_t *polygon,
const cairo_clip_t *clip)
{
cairo_bool_t should_be_lazy = FALSE;
if (! _cairo_composite_rectangles_init (extents,
surface, op, source, clip,
&should_be_lazy))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_box_round_to_rectangle (&polygon->extents, &extents->mask);
return _cairo_composite_rectangles_intersect (extents, clip);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_mask (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_pattern_get_extents (mask, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_boxes (cairo_composite_rectangles_t *extents,
cairo_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_boxes_t *boxes,
const cairo_clip_t *clip)
{
cairo_box_t box;
if (! _cairo_composite_rectangles_init (extents,
surface, op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_boxes_extents (boxes, &box);
_cairo_box_round_to_rectangle (&box, &extents->mask);
return _cairo_composite_rectangles_intersect (extents, clip);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_mask (cairo_composite_rectangles_t *extents,
cairo_surface_t*surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface, op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
extents->original_mask_pattern = mask;
_cairo_composite_reduce_pattern (mask, &extents->mask_pattern);
_cairo_pattern_get_extents (&extents->mask_pattern.base, &extents->mask);
return _cairo_composite_rectangles_intersect (extents, clip);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_stroke (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_path_fixed_approximate_stroke_extents (path, style, ctm, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
static cairo_status_t
_composite_spans_fill_func (void *closure,
cairo_operator_t op,
const cairo_pattern_t *src,
cairo_surface_t *dst,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents)
{
cairo_composite_rectangles_t rects;
cairo_composite_spans_fill_info_t *info = closure;
cairo_pattern_union_t pattern;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
_cairo_composite_rectangles_init (
&rects, extents->x, extents->y,
extents->width, extents->height);
/* The incoming dst_x/y are where we're pretending the origin of
* the dst surface is -- *not* the offset of a rectangle where
* we'd like to place the result. */
rects.dst.x -= dst_x;
rects.dst.y -= dst_y;
/* We're called without a source pattern from
* _create_composite_mask_pattern(). */
_cairo_pattern_init_solid (&pattern.solid, CAIRO_COLOR_WHITE,
CAIRO_CONTENT_COLOR);
if (src == NULL)
src = &pattern.base;
status = _cairo_path_fixed_fill_using_spans (
op, src, info->path, dst,
info->fill_rule, info->tolerance, info->antialias,
&rects);
_cairo_pattern_fini (&pattern.base);
return status;
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_stroke (cairo_composite_rectangles_t *extents,
cairo_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
const cairo_clip_t *clip)
{
cairo_bool_t should_be_lazy = FALSE;
if (! _cairo_composite_rectangles_init (extents,
surface, op, source, clip,
&should_be_lazy))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_path_fixed_approximate_stroke_extents (path, style, ctm, &extents->mask);
return _cairo_composite_rectangles_intersect (extents, clip);
}
static cairo_status_t
_cairo_clip_intersect_mask_using_spans (cairo_clip_t *clip,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias,
cairo_surface_t *target)
{
cairo_span_renderer_t *renderer = NULL;
cairo_pattern_union_t pattern;
cairo_rectangle_int_t surface_rect;
cairo_surface_t *surface = NULL;
cairo_status_t status;
cairo_operator_t op;
cairo_composite_rectangles_t rects;
if (clip->all_clipped)
return CAIRO_STATUS_SUCCESS;
_cairo_pattern_init_solid (&pattern.solid, CAIRO_COLOR_WHITE,
CAIRO_CONTENT_COLOR);
/* If we have a clip surface we're going to use IN to combine our
* new clip with the old clip. The ADD is done to a transparent
* surface, as that's a fast way of doing it currently. We should
* really be using SOURCE instead, but _cairo_surface_composite()
* checks that it's not called with SOURCE or DEST. */
op = clip->surface ? CAIRO_OPERATOR_IN : CAIRO_OPERATOR_ADD;
/* Test if the target can composite spans. We're going to assume
* this is a good indicator of whether a similar surface is going
* to be able to composite spans too. */
if ( !_cairo_surface_check_span_renderer (op,
&pattern.base,
target,
antialias,
NULL))
{
status = CAIRO_INT_STATUS_UNSUPPORTED;
goto BAIL;
}
status = _cairo_surface_get_extents (target, &surface_rect);
if (status)
goto BAIL;
/* We'll create a new surface the size of the intersection of the
* old mask surface and the extents of the new clip path. */
{
cairo_rectangle_int_t extents;
_cairo_path_fixed_approximate_clip_extents (path, &extents);
if (! _cairo_rectangle_intersect (&surface_rect, &extents))
goto SUCCESS;
if (clip->surface != NULL &&
! _cairo_rectangle_intersect (&surface_rect, &clip->surface_rect))
goto SUCCESS;
}
/* Make the new mask surface and optionally initialise it from the
* previous clip if we have one. */
surface = _cairo_surface_create_similar_solid (target,
CAIRO_CONTENT_ALPHA,
surface_rect.width,
surface_rect.height,
CAIRO_COLOR_TRANSPARENT);
if (surface->status) {
_cairo_pattern_fini (&pattern.base);
return surface->status;
}
if (clip->surface) {
cairo_surface_pattern_t old_clip;
_cairo_pattern_init_for_surface (&old_clip, clip->surface);
status = _cairo_surface_composite (CAIRO_OPERATOR_ADD,
&old_clip.base,
NULL,
surface,
surface_rect.x - clip->surface_rect.x,
surface_rect.y - clip->surface_rect.y,
0, 0,
0, 0,
surface_rect.width,
surface_rect.height);
_cairo_pattern_fini (&old_clip.base);
if (status)
goto BAIL;
}
_cairo_composite_rectangles_init (&rects,
surface_rect.x,
surface_rect.y,
surface_rect.width,
surface_rect.height);
rects.dst.x = 0;
rects.dst.y = 0;
/* Render the new clipping path into the new mask surface. We've
* chosen op to either combine the new clip path with the existing
* clip mask (if there is one) or just render it. */
status =_cairo_path_fixed_fill_using_spans (op, &pattern.base,
path, surface,
fill_rule, tolerance,
antialias, &rects);
if (status)
goto BAIL;
SUCCESS:
if (clip->surface != NULL)
cairo_surface_destroy (clip->surface);
clip->surface = surface;
clip->surface_rect = surface_rect;
clip->serial = _cairo_surface_allocate_clip_serial (target);
surface = NULL;
if (surface_rect.width == 0 || surface_rect.height == 0)
_cairo_clip_set_all_clipped (clip, target);
BAIL:
if (renderer)
renderer->destroy(renderer);
if (surface)
cairo_surface_destroy (surface);
_cairo_pattern_fini (&pattern.base);
return status;
}
