Author: Carlos Lopez <[email protected]>
Date: Sat Aug 11 09:24:46 2012 +0200
Circle Layer: initial support for straight blend inverted linear feathered
circles
---
synfig-core/src/modules/mod_geometry/circle.cpp | 32 ++++++++++++++++++++++-
1 files changed, 31 insertions(+), 1 deletions(-)
diff --git a/synfig-core/src/modules/mod_geometry/circle.cpp
b/synfig-core/src/modules/mod_geometry/circle.cpp
index aaa343b..604e8ea 100644
--- a/synfig-core/src/modules/mod_geometry/circle.cpp
+++ b/synfig-core/src/modules/mod_geometry/circle.cpp
@@ -788,7 +788,7 @@ Circle::accelerated_cairorender(Context
context,cairo_surface_t *surface,int qua
const Real pw = (br[0] - tl[0]) / w;
const Real ph = (br[1] - tl[1]) / h;
- // True if circle is degenerated (in_radius <0)
+ // True if circle is degenerated (out_radius <0)
bool degenerated(false);
// Don't render feathering at all when quality is 10
@@ -1014,6 +1014,36 @@ Circle::accelerated_cairorender(Context
context,cairo_surface_t *surface,int qua
}
else // feathered circle
{
+ if(invert)
+ {
+ // Draw the inverted feathered circle
+ cairo_pattern_t*
gradient=cairo_pattern_create_radial(origin[0], origin[1], out_radius,
origin[0], origin[1], in_radius);
+ cairo_pattern_add_color_stop_rgba(gradient,
0.0, r, g, b, a);
+ cairo_pattern_add_color_stop_rgba(gradient,
1.0, r, g, b, 0);
+ // Now draw the circle with the out_radius
+ cairo_save(cr);
+ // This is the scale and translation values
+ double tx(-tl[0]/pw);
+ double ty(-tl[1]/ph);
+ double sx(1/pw);
+ double sy(1/ph);
+
+ cairo_translate(cr, tx , ty);
+ cairo_scale(cr, sx, sy);
+ cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+ cairo_set_source(cr, gradient);
+ cairo_paint_with_alpha(cr, get_amount());
+ cairo_restore(cr);
+ cairo_pattern_destroy(gradient);
+ cairo_destroy(cr);
+ return true;
+
+
+ }
+ else
+ {
+
+ }
}
cairo_destroy(cr);
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