cairo_status_t _cairo_surface_fallback_show_glyphs (cairo_surface_t *surface, cairo_operator_t op, const cairo_pattern_t *source, cairo_glyph_t *glyphs, int num_glyphs, cairo_scaled_font_t *scaled_font) { cairo_status_t status; cairo_rectangle_int_t extents; cairo_show_glyphs_info_t glyph_info; status = _cairo_surface_get_extents (surface, &extents); if (unlikely (status)) return status; if (_cairo_operator_bounded_by_mask (op)) { cairo_rectangle_int_t glyph_extents; status = _cairo_scaled_font_glyph_device_extents (scaled_font, glyphs, num_glyphs, &glyph_extents); if (unlikely (status)) return status; if (! _cairo_rectangle_intersect (&extents, &glyph_extents)) return CAIRO_STATUS_SUCCESS; } status = _cairo_clip_intersect_to_rectangle (surface->clip, &extents); if (unlikely (status)) return status; glyph_info.font = scaled_font; glyph_info.glyphs = glyphs; glyph_info.num_glyphs = num_glyphs; status = _clip_and_composite (surface->clip, op, source, _cairo_surface_old_show_glyphs_draw_func, &glyph_info, surface, &extents); return status; }
cairo_status_t _cairo_surface_fallback_mask (cairo_surface_t *surface, cairo_operator_t op, const cairo_pattern_t *source, const cairo_pattern_t *mask) { cairo_status_t status; cairo_rectangle_int_t extents, source_extents, mask_extents; status = _cairo_surface_get_extents (surface, &extents); if (unlikely (status)) return status; if (_cairo_operator_bounded_by_source (op)) { status = _cairo_pattern_get_extents (source, &source_extents); if (unlikely (status)) return status; if (! _cairo_rectangle_intersect (&extents, &source_extents)) return CAIRO_STATUS_SUCCESS; } if (_cairo_operator_bounded_by_mask (op)) { status = _cairo_pattern_get_extents (mask, &mask_extents); if (unlikely (status)) return status; if (! _cairo_rectangle_intersect (&extents, &mask_extents)) return CAIRO_STATUS_SUCCESS; } status = _cairo_clip_intersect_to_rectangle (surface->clip, &extents); if (unlikely (status)) return status; status = _clip_and_composite (surface->clip, op, source, _cairo_surface_mask_draw_func, (void *) mask, surface, &extents); return status; }
cairo_status_t _cairo_surface_fallback_mask (cairo_surface_t *surface, cairo_operator_t op, cairo_pattern_t *source, cairo_pattern_t *mask) { cairo_status_t status; cairo_rectangle_int16_t extents, source_extents, mask_extents; status = _cairo_surface_get_extents (surface, &extents); if (status) return status; if (_cairo_operator_bounded_by_source (op)) { status = _cairo_pattern_get_extents (source, &source_extents); if (status) return status; _cairo_rectangle_intersect (&extents, &source_extents); } if (_cairo_operator_bounded_by_mask (op)) { status = _cairo_pattern_get_extents (mask, &mask_extents); if (status) return status; _cairo_rectangle_intersect (&extents, &mask_extents); } status = _cairo_clip_intersect_to_rectangle (surface->clip, &extents); if (status) return status; status = _clip_and_composite (surface->clip, op, source, _cairo_surface_mask_draw_func, mask, surface, &extents); return status; }
/* Warning: This call modifies the coordinates of traps */ static cairo_status_t _clip_and_composite_trapezoids (cairo_pattern_t *src, cairo_operator_t op, cairo_surface_t *dst, cairo_traps_t *traps, cairo_clip_t *clip, cairo_antialias_t antialias) { cairo_status_t status; cairo_region_t trap_region; cairo_region_t clear_region; cairo_bool_t has_trap_region = FALSE; cairo_bool_t has_clear_region = FALSE; cairo_rectangle_int_t extents; cairo_composite_traps_info_t traps_info; if (traps->num_traps == 0) return CAIRO_STATUS_SUCCESS; status = _cairo_surface_get_extents (dst, &extents); if (status) return status; status = _cairo_traps_extract_region (traps, &trap_region); if (CAIRO_INT_STATUS_UNSUPPORTED == status) { has_trap_region = FALSE; } else if (status) { return status; } else { has_trap_region = TRUE; } if (_cairo_operator_bounded_by_mask (op)) { cairo_rectangle_int_t trap_extents; if (has_trap_region) { status = _cairo_clip_intersect_to_region (clip, &trap_region); if (status) goto out; _cairo_region_get_extents (&trap_region, &trap_extents); } else { cairo_box_t trap_box; _cairo_traps_extents (traps, &trap_box); _cairo_box_round_to_rectangle (&trap_box, &trap_extents); } _cairo_rectangle_intersect (&extents, &trap_extents); status = _cairo_clip_intersect_to_rectangle (clip, &extents); if (status) goto out; } else { cairo_surface_t *clip_surface = clip ? clip->surface : NULL; if (has_trap_region && !clip_surface) { /* If we optimize drawing with an unbounded operator to * _cairo_surface_fill_rectangles() or to drawing with a * clip region, then we have an additional region to clear. */ _cairo_region_init_rect (&clear_region, &extents); has_clear_region = TRUE; status = _cairo_clip_intersect_to_region (clip, &clear_region); if (status) goto out; _cairo_region_get_extents (&clear_region, &extents); status = _cairo_region_subtract (&clear_region, &clear_region, &trap_region); if (status) goto out; if (!_cairo_region_not_empty (&clear_region)) { _cairo_region_fini (&clear_region); has_clear_region = FALSE; } } else { status = _cairo_clip_intersect_to_rectangle (clip, &extents); } } if (status) goto out; if (has_trap_region) { cairo_surface_t *clip_surface = clip ? clip->surface : NULL; if ((src->type == CAIRO_PATTERN_TYPE_SOLID || op == CAIRO_OPERATOR_CLEAR) && !clip_surface) { const cairo_color_t *color; if (op == CAIRO_OPERATOR_CLEAR) { color = CAIRO_COLOR_TRANSPARENT; } else { color = &((cairo_solid_pattern_t *)src)->color; } /* Solid rectangles special case */ status = _cairo_surface_fill_region (dst, op, color, &trap_region); if (!status && has_clear_region) status = _cairo_surface_fill_region (dst, CAIRO_OPERATOR_CLEAR, CAIRO_COLOR_TRANSPARENT, &clear_region); goto out; } if ((_cairo_operator_bounded_by_mask (op) && op != CAIRO_OPERATOR_SOURCE) || !clip_surface) { /* For a simple rectangle, we can just use composite(), for more * rectangles, we have to set a clip region. The cost of rasterizing * trapezoids is pretty high for most backends currently, so it's * worthwhile even if a region is needed. * * If we have a clip surface, we set it as the mask; this only works * for bounded operators other than SOURCE; for unbounded operators, * clip and mask cannot be interchanged. For SOURCE, the operator * as implemented by the backends is different in it's handling * of the mask then what we want. * * CAIRO_INT_STATUS_UNSUPPORTED will be returned if the region has * more than rectangle and the destination doesn't support clip * regions. In that case, we fall through. */ status = _composite_trap_region (clip, src, op, dst, &trap_region, &extents); if (status != CAIRO_INT_STATUS_UNSUPPORTED) { if (!status && has_clear_region) status = _cairo_surface_fill_region (dst, CAIRO_OPERATOR_CLEAR, CAIRO_COLOR_TRANSPARENT, &clear_region); goto out; } } } traps_info.traps = traps; traps_info.antialias = antialias; status = _clip_and_composite (clip, op, src, _composite_traps_draw_func, &traps_info, dst, &extents); out: if (has_trap_region) _cairo_region_fini (&trap_region); if (has_clear_region) _cairo_region_fini (&clear_region); return status; }
cairo_status_t _cairo_surface_fallback_fill (cairo_surface_t *surface, cairo_operator_t op, const cairo_pattern_t *source, cairo_path_fixed_t *path, cairo_fill_rule_t fill_rule, double tolerance, cairo_antialias_t antialias) { cairo_status_t status; cairo_traps_t traps; cairo_box_t box; cairo_rectangle_int_t extents; status = _cairo_surface_get_extents (surface, &extents); if (unlikely (status)) return status; if (_cairo_operator_bounded_by_source (op)) { cairo_rectangle_int_t source_extents; status = _cairo_pattern_get_extents (source, &source_extents); if (unlikely (status)) return status; if (! _cairo_rectangle_intersect (&extents, &source_extents)) return CAIRO_STATUS_SUCCESS; } status = _cairo_clip_intersect_to_rectangle (surface->clip, &extents); if (unlikely (status)) return status; if (extents.width == 0 || extents.height == 0) return CAIRO_STATUS_SUCCESS; /* Ask if the surface would like to render this combination of * op/source/dst/antialias with spans or not, but don't actually * make a renderer yet. We'll try to hit the region optimisations * in _clip_and_composite_trapezoids() if it looks like the path * is a region. */ /* TODO: Until we have a mono scan converter we won't even try * to use spans for CAIRO_ANTIALIAS_NONE. */ /* TODO: The region filling code should be lifted from * _clip_and_composite_trapezoids() and given first priority * explicitly before deciding between spans and trapezoids. */ if (antialias != CAIRO_ANTIALIAS_NONE && !_cairo_path_fixed_is_box (path, &box) && !_cairo_path_fixed_is_region (path) && _cairo_surface_check_span_renderer ( op, source, surface, antialias, NULL)) { cairo_composite_spans_fill_info_t info; info.path = path; info.fill_rule = fill_rule; info.tolerance = tolerance; info.antialias = antialias; if (_cairo_operator_bounded_by_mask (op)) { cairo_rectangle_int_t path_extents; _cairo_path_fixed_approximate_clip_extents (path, &path_extents); if (! _cairo_rectangle_intersect (&extents, &path_extents)) return CAIRO_STATUS_SUCCESS; } return _clip_and_composite ( surface->clip, op, source, _composite_spans_fill_func, &info, surface, &extents); } /* Fall back to trapezoid fills. */ _cairo_box_from_rectangle (&box, &extents); _cairo_traps_init (&traps); _cairo_traps_limit (&traps, &box); status = _cairo_path_fixed_fill_to_traps (path, fill_rule, tolerance, &traps); if (unlikely (status)) { _cairo_traps_fini (&traps); return status; } status = _clip_and_composite_trapezoids (source, op, surface, &traps, surface->clip, antialias); _cairo_traps_fini (&traps); return status; }