Remove ancient trunk folder from svn repository

[synfig.git] / synfig-core / src / modules / lyr_std / zoom.cpp

diff --git a/synfig-core/src/modules/lyr_std/zoom.cpp b/synfig-core/src/modules/lyr_std/zoom.cpp
new file mode 100644 (file)
index 0000000..ff73c4c
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+++ b/synfig-core/src/modules/lyr_std/zoom.cpp
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+/* === S Y N F I G ========================================================= */
+/*!    \file zoom.cpp
+**     \brief Implementation of the "Zoom" layer
+**
+**     $Id$
+**
+**     \legal
+**     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**
+**     This package is free software; you can redistribute it and/or
+**     modify it under the terms of the GNU General Public License as
+**     published by the Free Software Foundation; either version 2 of
+**     the License, or (at your option) any later version.
+**
+**     This package is distributed in the hope that it will be useful,
+**     but WITHOUT ANY WARRANTY; without even the implied warranty of
+**     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+**     General Public License for more details.
+**     \endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+#      include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+#      include <config.h>
+#endif
+
+#include "zoom.h"
+#include <synfig/string.h>
+#include <synfig/time.h>
+#include <synfig/context.h>
+#include <synfig/paramdesc.h>
+#include <synfig/renddesc.h>
+#include <synfig/surface.h>
+#include <synfig/value.h>
+#include <synfig/valuenode.h>
+#include <synfig/transform.h>
+
+#endif
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+
+SYNFIG_LAYER_INIT(Zoom);
+SYNFIG_LAYER_SET_NAME(Zoom,"zoom");
+SYNFIG_LAYER_SET_LOCAL_NAME(Zoom,N_("Zoom"));
+SYNFIG_LAYER_SET_CATEGORY(Zoom,N_("Transform"));
+SYNFIG_LAYER_SET_VERSION(Zoom,"0.1");
+SYNFIG_LAYER_SET_CVS_ID(Zoom,"$Id$");
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+/* === E N T R Y P O I N T ================================================= */
+
+Zoom::Zoom():
+       center(0,0),
+       amount(0)
+{
+}
+
+bool
+Zoom::set_param(const String & param, const ValueBase &value)
+{
+
+       IMPORT(center);
+       IMPORT(amount);
+
+       return false;
+}
+
+ValueBase
+Zoom::get_param(const String &param)const
+{
+       EXPORT(center);
+       EXPORT(amount);
+
+       EXPORT_NAME();
+       EXPORT_VERSION();
+
+       return ValueBase();
+}
+
+Layer::Vocab
+Zoom::get_param_vocab()const
+{
+       Layer::Vocab ret;
+
+       ret.push_back(ParamDesc("amount")
+               .set_local_name(_("Amount"))
+               .set_description(_("Amount to zoom in"))
+       );
+
+       ret.push_back(ParamDesc("center")
+               .set_local_name(_("Center"))
+               .set_description(_("Point to zoom in to"))
+       );
+
+       return ret;
+}
+
+synfig::Layer::Handle
+Zoom::hit_check(synfig::Context context, const synfig::Point &pos)const
+{
+       return context.hit_check((pos-center)/exp(amount)+center);
+}
+
+Color
+Zoom::get_color(Context context, const Point &pos)const
+{
+       return context.get_color((pos-center)/exp(amount)+center);
+}
+
+class Zoom_Trans : public Transform
+{
+       etl::handle<const Zoom> layer;
+public:
+       Zoom_Trans(const Zoom* x):Transform(x->get_guid()),layer(x) { }
+
+       synfig::Vector perform(const synfig::Vector& x)const
+       {
+               return (x-layer->center)*exp(layer->amount)+layer->center;
+       }
+
+       synfig::Vector unperform(const synfig::Vector& x)const
+       {
+               return (x-layer->center)/exp(layer->amount)+layer->center;
+       }
+};
+etl::handle<Transform>
+Zoom::get_transform()const
+{
+       return new Zoom_Trans(this);
+}
+
+bool
+Zoom::accelerated_render(Context context,Surface *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_render(surface,quality,desc,cb);
+}
+
+synfig::Rect
+Zoom::get_full_bounding_rect(synfig::Context context)const
+{
+       return (context.get_full_bounding_rect()-center)*exp(amount)+center;
+}