Author: Carlos Lopez <genet...@gmail.com>
Date: Sun Aug 12 10:57:11 2012 +0200
Checkerboard Layer: add support for Cairo render
---
.../src/modules/mod_geometry/checkerboard.cpp | 95 ++++++++++++++++++++
.../src/modules/mod_geometry/checkerboard.h | 1 +
2 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/synfig-core/src/modules/mod_geometry/checkerboard.cpp
b/synfig-core/src/modules/mod_geometry/checkerboard.cpp
index 2e20c88..bb81100 100644
--- a/synfig-core/src/modules/mod_geometry/checkerboard.cpp
+++ b/synfig-core/src/modules/mod_geometry/checkerboard.cpp
@@ -200,3 +200,98 @@ CheckerBoard::accelerated_render(Context context,Surface
*surface,int quality, c
return true;
}
+
+//////////
+
+bool
+CheckerBoard::accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ SuperCallback supercb(cb,0,9500,10000);
+
+ if(!is_solid_color())
+
if(!context.accelerated_cairorender(surface,quality,renddesc,&supercb))
+ return false;
+
+ if(get_amount()==0)
+ return true;
+
+ const float r(color.get_r());
+ const float g(color.get_g());
+ const float b(color.get_b());
+ const float a(color.get_a());
+
+ 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 translation values
+ const double tx(-tl[0]/pw);
+ const double ty(-tl[1]/ph);
+
+ Point newsize(size);
+ if(newsize[0] <0.0) newsize[0]=-newsize[0];
+ if(newsize[1] <0.0) newsize[1]=-newsize[1];
+
+ // Now let's render the minimum checkerboard in other surface
+ // Initially I'll fill it completely with the alpha color
+ // Create a similar image with the same dimensions than the minimum
checkerboard
+ RendDesc desc(renddesc);
+ //desc.set_flags(0);
+ // this will modify the w and h values in pixels.
+ desc.set_tl(Point(origin[0]-newsize[0], origin[1]+newsize[1]));
+ desc.set_br(Point(origin[0]+newsize[0], origin[1]-newsize[1]));
+ double subsx(1/desc.get_pw());
+ double subsy(1/desc.get_ph());
+ double subtx(-desc.get_tl()[0]*subsx);
+ double subty(-desc.get_tl()[1]*subsy);
+ cairo_surface_t* subimage=cairo_surface_create_similar(surface,
CAIRO_CONTENT_COLOR_ALPHA, desc.get_w(), desc.get_h());
+ cairo_t* subcr=cairo_create(subimage);
+ cairo_save(subcr);
+ cairo_translate(subcr, subtx , subty);
+ cairo_scale(subcr, subsx, subsy);
+ cairo_set_source_rgba(subcr, r, g, b, a);
+ cairo_rectangle(subcr, origin[0]-newsize[0], origin[1]-newsize[1],
newsize[0], newsize[1]);
+ cairo_clip(subcr);
+ cairo_paint_with_alpha(subcr, get_amount());
+ cairo_restore(subcr);
+ cairo_save(subcr);
+ cairo_translate(subcr, subtx , subty);
+ cairo_scale(subcr, subsx, subsy);
+ cairo_set_source_rgba(subcr, r, g, b, a);
+ cairo_rectangle(subcr, origin[0], origin[1], newsize[0], newsize[1]);
+ cairo_clip(subcr);
+ cairo_paint_with_alpha(subcr, get_amount());
+ cairo_restore(subcr);
+
+ cairo_t* cr=cairo_create(surface);
+ cairo_save(cr);
+ cairo_translate(cr, tx , ty);
+ cairo_pattern_t* pattern=cairo_pattern_create_for_surface(subimage);
+ cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
+ cairo_set_source(cr, pattern);
+ if(is_solid_color())
+ cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+ else
+ cairo_set_operator(cr, CAIRO_OPERATOR_OVER); // TODO this has
to be the real operator
+ cairo_paint_with_alpha(cr, get_amount());
+
+ cairo_surface_destroy(subimage);
+ cairo_pattern_destroy(pattern);
+ cairo_destroy(subcr);
+ cairo_destroy(cr);
+
+ // Mark our progress as finished
+ if(cb && !cb->amount_complete(10000,10000))
+ return false;
+
+ return true;
+}
+
+//////////
+
diff --git a/synfig-core/src/modules/mod_geometry/checkerboard.h
b/synfig-core/src/modules/mod_geometry/checkerboard.h
index f30bda7..95d5e96 100644
--- a/synfig-core/src/modules/mod_geometry/checkerboard.h
+++ b/synfig-core/src/modules/mod_geometry/checkerboard.h
@@ -64,6 +64,7 @@ public:
synfig::Layer::Handle hit_check(synfig::Context context, const
synfig::Point &point)const;
virtual bool accelerated_render(synfig::Context context,synfig::Surface
*surface,int quality, const synfig::RendDesc &renddesc,
synfig::ProgressCallback *cb)const;
+ virtual bool accelerated_cairorender(synfig::Context
context,cairo_surface_t *surface,int quality, const synfig::RendDesc &renddesc,
synfig::ProgressCallback *cb)const;
};
/* === E N D =============================================================== */
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