Author: Carlos Lopez <[email protected]>
Date: Mon Aug 13 12:24:37 2012 +0200
Layer_Polygon: initial version for Cairo render. No feather support yet. Needed
to expose some private members of Layer_Shape to Polygon_Layer in order to use
them in the render procedure
---
synfig-core/src/synfig/layer_polygon.cpp | 86 ++++++++++++++++++++++++++++++
synfig-core/src/synfig/layer_polygon.h | 2 +
synfig-core/src/synfig/layer_shape.h | 6 +-
3 files changed, 91 insertions(+), 3 deletions(-)
diff --git a/synfig-core/src/synfig/layer_polygon.cpp
b/synfig-core/src/synfig/layer_polygon.cpp
index 9060dad..c46f1a2 100644
--- a/synfig-core/src/synfig/layer_polygon.cpp
+++ b/synfig-core/src/synfig/layer_polygon.cpp
@@ -179,3 +179,89 @@ Layer_Polygon::get_param_vocab()const
return ret;
}
+
+
+/////////
+bool
+Layer_Polygon::accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ synfig::info("rendering Cairo polygon");
+
+ // Grab the rgba values
+ const float r(color.get_r());
+ const float g(color.get_g());
+ const float b(color.get_b());
+ const float a(color.get_a());
+
+ // Window Boundaries
+ 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;
+
+ // These are the scale and translation values
+ const double sx(1/pw);
+ const double sy(1/ph);
+ const double tx((-tl[0]+origin[0])*sx);
+ const double ty((-tl[1]+origin[1])*sy);
+
+ cairo_t* cr=cairo_create(surface);
+ // Let's render the polygon in other surface
+ // Initially I'll fill it completely with the alpha color
+ // Create a similar image with the same dimensions than the current
renddesc
+ cairo_surface_t* subimage=cairo_surface_create_similar(surface,
CAIRO_CONTENT_COLOR_ALPHA, renddesc.get_w(), renddesc.get_h());
+ cairo_t* subcr=cairo_create(subimage);
+ cairo_save(subcr);
+ cairo_set_source_rgba(subcr, r, g, b, a);
+ // Now let's check if it is inverted
+ if(invert)
+ {
+ cairo_paint(subcr);
+ }
+ // Draw the polygon
+ cairo_save(subcr);
+ cairo_translate(subcr, tx , ty);
+ cairo_scale(subcr, sx, sy);
+ int i,pointcount=vector_list.size();
+ for(i=0;i<pointcount; i++)
+ {
+ cairo_line_to(subcr, vector_list[i][0], vector_list[i][1]);
+ }
+ cairo_close_path(subcr);
+ if(invert)
+ cairo_set_operator(subcr, CAIRO_OPERATOR_CLEAR);
+ else
+ cairo_set_operator(subcr, CAIRO_OPERATOR_OVER);
+
+ cairo_fill(subcr);
+ cairo_restore(subcr);
+
+ // ADD FEATHER HERE
+
+ // Put the polygon on the surface
+ if(!is_solid_color()) // we need to render the context before
+
if(!context.accelerated_cairorender(surface,quality,renddesc,cb))
+ {
+ if(cb)
+ cb->error(strprintf(__FILE__"%d: Accelerated
Cairo Renderer Failure",__LINE__));
+ cairo_destroy(cr);
+ cairo_destroy(subcr);
+ cairo_surface_destroy(subimage);
+ return false;
+ }
+ cairo_set_source_surface(cr, subimage, 0, 0);
+ cairo_set_operator(cr, CAIRO_OPERATOR_OVER); // TODO: this has to be
the real operator
+ cairo_paint_with_alpha(cr, get_amount());
+ cairo_restore(cr);
+ cairo_surface_destroy(subimage);
+ cairo_destroy(subcr);
+ cairo_destroy(cr);
+
+ return true;
+}
+
+/////////
diff --git a/synfig-core/src/synfig/layer_polygon.h
b/synfig-core/src/synfig/layer_polygon.h
index 262c91b..8294648 100644
--- a/synfig-core/src/synfig/layer_polygon.h
+++ b/synfig-core/src/synfig/layer_polygon.h
@@ -88,6 +88,8 @@ public:
private:
class PolySpan;
bool render_polyspan(Surface *surface,PolySpan &polyspan)const;
+ virtual bool accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
+
}; // END of Layer_Polygon
}; // END of namespace synfig
diff --git a/synfig-core/src/synfig/layer_shape.h
b/synfig-core/src/synfig/layer_shape.h
index 1b20d52..5655cfd 100644
--- a/synfig-core/src/synfig/layer_shape.h
+++ b/synfig-core/src/synfig/layer_shape.h
@@ -62,9 +62,9 @@ private:
//internal caching
struct Intersector;
Intersector *edge_table;
-
+protected:
//exported data
- Color color;
+ Color color;
Point origin;
bool invert;
@@ -73,7 +73,7 @@ private:
int blurtype;
Real feather;
WindingStyle winding_style;
-
+private:
std::vector< char > bytestream;
//for use in creating the bytestream
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