Author: Carlos Lopez <genet...@gmail.com>
Date: Tue Aug 21 18:38:39 2012 +0200
Zoom layer: add support for Cairo render.
---
synfig-core/src/modules/lyr_std/zoom.cpp | 19 +++++++++++++++++++
synfig-core/src/modules/lyr_std/zoom.h | 1 +
2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/synfig-core/src/modules/lyr_std/zoom.cpp
b/synfig-core/src/modules/lyr_std/zoom.cpp
index 430e5c6..b8a8bcb 100644
--- a/synfig-core/src/modules/lyr_std/zoom.cpp
+++ b/synfig-core/src/modules/lyr_std/zoom.cpp
@@ -157,6 +157,25 @@ Zoom::accelerated_render(Context context,Surface
*surface,int quality, const Ren
return context.accelerated_render(surface,quality,desc,cb);
}
+/////
+bool
+Zoom::accelerated_cairorender(Context context,cairo_surface_t *surface,int
quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ Vector::value_type zoomfactor=1.0/exp(amount);
+ RendDesc desc(renddesc);
+ desc.clear_flags();
+
+ // Adjust the top_left and bottom_right points
+ // for our zoom amount
+ desc.set_tl((desc.get_tl()-center)*zoomfactor+center);
+ desc.set_br((desc.get_br()-center)*zoomfactor+center);
+
+ // Render the scene
+ return context.accelerated_cairorender(surface,quality,desc,cb);
+}
+/////
+
+
synfig::Rect
Zoom::get_full_bounding_rect(synfig::Context context)const
{
diff --git a/synfig-core/src/modules/lyr_std/zoom.h
b/synfig-core/src/modules/lyr_std/zoom.h
index aaced17..e1654a1 100644
--- a/synfig-core/src/modules/lyr_std/zoom.h
+++ b/synfig-core/src/modules/lyr_std/zoom.h
@@ -56,6 +56,7 @@ public:
virtual ValueBase get_param(const String & param)const;
virtual Color get_color(Context context, const Point &pos)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;
synfig::Layer::Handle hit_check(synfig::Context context, const
synfig::Point &point)const;
virtual Vocab get_param_vocab()const;
virtual synfig::Rect get_full_bounding_rect(synfig::Context
context)const;
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