diff options
Diffstat (limited to 'src/filter-chemistry.cpp')
| -rw-r--r-- | src/filter-chemistry.cpp | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/src/filter-chemistry.cpp b/src/filter-chemistry.cpp index e18e54ed6..3c27b6edc 100644 --- a/src/filter-chemistry.cpp +++ b/src/filter-chemistry.cpp @@ -24,10 +24,10 @@ #include "xml/repr.h" /** - * Creates a filter with blur primitive of specified stdDeviation + * Creates a filter with blur primitive of specified radius for an item with the given matrix expansion, width and height */ SPFilter * -new_filter_gaussian_blur (SPDocument *document, gdouble stdDeviation, double width, double height) +new_filter_gaussian_blur (SPDocument *document, gdouble radius, double expansion, double width, double height) { g_return_val_if_fail(document != NULL, NULL); @@ -38,12 +38,13 @@ new_filter_gaussian_blur (SPDocument *document, gdouble stdDeviation, double wid repr = sp_repr_new("svg:filter"); repr->setAttribute("inkscape:collect", "always"); - if (width != 0 && height != 0 && (2 * stdDeviation > width * 0.1 || 2 * stdDeviation > height * 0.1)) { + if (width != 0 && height != 0 && (2 * radius > width * 0.1 || 2 * radius > height * 0.1)) { // If not within the default 10% margin (see // http://www.w3.org/TR/SVG11/filters.html#FilterEffectsRegion), specify margins - double xmargin = 2 * stdDeviation / width; - double ymargin = 2 * stdDeviation / height; + double xmargin = 2 * radius / width; + double ymargin = 2 * radius / height; + // TODO: set it in UserSpaceOnUse instead? sp_repr_set_svg_double(repr, "x", -xmargin); sp_repr_set_svg_double(repr, "width", 1 + 2 * xmargin); sp_repr_set_svg_double(repr, "y", -ymargin); @@ -55,6 +56,10 @@ new_filter_gaussian_blur (SPDocument *document, gdouble stdDeviation, double wid b_repr = sp_repr_new("svg:feGaussianBlur"); b_repr->setAttribute("inkscape:collect", "always"); + double stdDeviation = radius; + if (expansion != 0) + stdDeviation /= expansion; + //set stdDeviation attribute sp_repr_set_svg_double(b_repr, "stdDeviation", stdDeviation); @@ -78,6 +83,21 @@ new_filter_gaussian_blur (SPDocument *document, gdouble stdDeviation, double wid return f; } +/** + * Creates a filter with blur primitive of specified radius for the given item + */ +SPFilter * +new_filter_gaussian_blur_from_item (SPDocument *document, SPItem *item, gdouble radius) +{ + NR::Rect const r = sp_item_bbox_desktop(item); + double width = r.extent(NR::X); + double height = r.extent(NR::Y); + + NR::Matrix i2d = sp_item_i2d_affine (item); + + return (new_filter_gaussian_blur (document, radius, i2d.expansion(), width, height)); +} + void remove_filter (SPObject *item, bool recursive) { SPCSSAttr *css = sp_repr_css_attr_new (); |