Author: Carlos Lopez <genet...@gmail.com>
Date: Wed Aug 15 18:03:39 2012 +0200
RadialGradient: add support for Cairo render.
---
.../src/modules/mod_gradient/radialgradient.cpp | 111 ++++++++++++++++++++
.../src/modules/mod_gradient/radialgradient.h | 28 +++--
2 files changed, 128 insertions(+), 11 deletions(-)
diff --git a/synfig-core/src/modules/mod_gradient/radialgradient.cpp
b/synfig-core/src/modules/mod_gradient/radialgradient.cpp
index 6d1862e..1a5571e 100644
--- a/synfig-core/src/modules/mod_gradient/radialgradient.cpp
+++ b/synfig-core/src/modules/mod_gradient/radialgradient.cpp
@@ -255,3 +255,114 @@ RadialGradient::accelerated_render(Context
context,Surface *surface,int quality,
return true;
}
+
+bool
+RadialGradient::accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ const Point tl(renddesc.get_tl());
+ const Point br(renddesc.get_br());
+
+ const int w(renddesc.get_w());
+ const int h(renddesc.get_h());
+
+ // Width and Height of a pixel
+ const Real pw = (br[0] - tl[0]) / w;
+ const Real ph = (br[1] - tl[1]) / h;
+
+ const double tx(-tl[0]/pw);
+ const double ty(-tl[1]/ph);
+ const double sx(1/pw);
+ const double sy(1/ph);
+
+ cairo_t* cr=cairo_create(surface);
+ cairo_save(cr);
+ cairo_pattern_t* pattern=cairo_pattern_create_radial(center[0],
center[1], 0.0 ,center[0], center[1], radius);
+ bool cpoints_all_opaque=compile_gradient(pattern, gradient);
+ if(loop)
+ cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
+ if(quality>8) cairo_pattern_set_filter(pattern, CAIRO_FILTER_FAST);
+ else if(quality>=4) cairo_pattern_set_filter(pattern,
CAIRO_FILTER_GOOD);
+ else cairo_pattern_set_filter(pattern, CAIRO_FILTER_BEST);
+ if(
+ !
+ (is_solid_color() ||
+ cpoints_all_opaque &&
get_blend_method()==Color::BLEND_COMPOSITE && get_amount()==1.0)
+ )
+ {
+ // Initially render what's behind us
+
if(!context.accelerated_cairorender(surface,quality,renddesc,cb))
+ {
+ if(cb)cb->error(strprintf(__FILE__"%d: Accelerated
Cairo Renderer Failure",__LINE__));
+ cairo_destroy(cr);
+ return false;
+ }
+ }
+ cairo_translate(cr, tx , ty);
+ cairo_scale(cr, sx, sy);
+ cairo_set_operator(cr, CAIRO_OPERATOR_OVER); // TODO: this has to be
the real operator
+ cairo_set_source(cr, pattern);
+ cairo_paint_with_alpha(cr, get_amount());
+
+ cairo_pattern_destroy(pattern); // Not needed more
+ cairo_restore(cr);
+ cairo_destroy(cr);
+
+}
+
+bool
+RadialGradient::compile_gradient(cairo_pattern_t* pattern, Gradient
mygradient)const
+{
+ bool cpoints_all_opaque=true;
+ float a,r,g,b;
+ Gradient::CPoint cp;
+ Gradient::const_iterator iter;
+ mygradient.sort();
+ if(zigzag)
+ {
+ Gradient zgradient;
+ for(iter=mygradient.begin();iter!=mygradient.end(); iter++)
+ {
+ cp=*iter;
+ cp.pos=cp.pos/2;
+ zgradient.push_back(cp);
+ }
+ for(iter=mygradient.begin();iter!=mygradient.end(); iter++)
+ {
+ cp=*iter;
+ cp.pos=1.0-cp.pos/2;
+ zgradient.push_back(cp);
+ }
+ mygradient=zgradient;
+ }
+ mygradient.sort();
+ if(loop)
+ {
+ cp=*mygradient.begin();
+ a=cp.color.get_a();
+ r=cp.color.get_r();
+ g=cp.color.get_g();
+ b=cp.color.get_b();
+ cairo_pattern_add_color_stop_rgba(pattern, 0.0, r, g, b, a);
+ }
+ for(iter=mygradient.begin();iter!=mygradient.end(); iter++)
+ {
+ cp=*iter;
+ a=cp.color.get_a();
+ r=cp.color.get_r();
+ g=cp.color.get_g();
+ b=cp.color.get_b();
+ cairo_pattern_add_color_stop_rgba(pattern, cp.pos, r, g, b, a);
+ if(a!=1.0) cpoints_all_opaque=false;
+ }
+ if(loop)
+ {
+ cp=*(--mygradient.end());
+ a=cp.color.get_a();
+ r=cp.color.get_r();
+ g=cp.color.get_g();
+ b=cp.color.get_b();
+ cairo_pattern_add_color_stop_rgba(pattern, 1.0, r, g, b, a);
+ }
+ return cpoints_all_opaque;
+}
+
diff --git a/synfig-core/src/modules/mod_gradient/radialgradient.h
b/synfig-core/src/modules/mod_gradient/radialgradient.h
index 4c39f91..3e638b8 100644
--- a/synfig-core/src/modules/mod_gradient/radialgradient.h
+++ b/synfig-core/src/modules/mod_gradient/radialgradient.h
@@ -39,37 +39,43 @@
/* === C L A S S E S & S T R U C T S ======================================= */
-class RadialGradient : public synfig::Layer_Composite, public
synfig::Layer_NoDeform
+using namespace synfig;
+using namespace std;
+using namespace etl;
+
+class RadialGradient : public Layer_Composite, public Layer_NoDeform
{
SYNFIG_LAYER_MODULE_EXT
private:
- synfig::Gradient gradient;
+ Gradient gradient;
- synfig::Point center;
+ Point center;
- synfig::Real radius;
+ Real radius;
bool loop;
bool zigzag;
- synfig::Color color_func(const synfig::Point &x, float
supersample=0)const;
+ Color color_func(const Point &x, float supersample=0)const;
- float calc_supersample(const synfig::Point &x, float pw,float ph)const;
+ float calc_supersample(const Point &x, float pw,float ph)const;
+ bool compile_gradient(cairo_pattern_t* pattern, Gradient gradient)const;
public:
RadialGradient();
- virtual bool set_param(const synfig::String & param, const
synfig::ValueBase &value);
+ virtual bool set_param(const String & param, const ValueBase &value);
- virtual synfig::ValueBase get_param(const synfig::String & param)const;
+ virtual ValueBase get_param(const String & param)const;
- virtual synfig::Color get_color(synfig::Context context, const
synfig::Point &pos)const;
+ virtual Color get_color(Context context, const Point &pos)const;
- virtual bool accelerated_render(synfig::Context context,synfig::Surface
*surface,int quality, const synfig::RendDesc &renddesc,
synfig::ProgressCallback *cb)const;
- synfig::Layer::Handle hit_check(synfig::Context context, const
synfig::Point &point)const;
+ virtual bool accelerated_render(Context context, Surface *surface,int
quality, const RendDesc &renddesc, ProgressCallback *cb)const;
+ virtual bool accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
+ Layer::Handle hit_check(Context context, const Point &point)const;
virtual Vocab get_param_vocab()const;
}; // END of class RadialGradient
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