1 // Owner Drawn Gauge helper class
3 // Written by Harald JOHNSEN, started May 2005.
5 // Copyright (C) 2005 Harald JOHNSEN - hjohnsen@evc.net
7 // Ported to OSG by Tim Moore - Jun 2007
9 // Heavily modified to be usable for the 2d Canvas by Thomas Geymayer - April 2012
10 // Supports now multisampling/mipmapping, usage of the stencil buffer and placing
11 // the texture in the scene by certain filter criteria
13 // This library is free software; you can redistribute it and/or
14 // modify it under the terms of the GNU Library General Public
15 // License as published by the Free Software Foundation; either
16 // version 2 of the License, or (at your option) any later version.
18 // This library is distributed in the hope that it will be useful,
19 // but WITHOUT ANY WARRANTY; without even the implied warranty of
20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 // Library General Public License for more details.
23 // You should have received a copy of the GNU Library General Public
24 // License along with this library; if not, write to the Free Software
25 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
27 #ifndef _SG_OD_GAUGE_HXX
28 #define _SG_OD_GAUGE_HXX
30 #include "canvas_fwd.hxx"
32 #include <osg/NodeCallback>
47 * Owner Drawn Gauge (aka render-to-texture) helper class
56 void setSystemAdapter(const SystemAdapterPtr& system_adapter);
59 * Set the size of the render target.
61 * @param size_x X size
62 * @param size_y Y size. Defaults to size_x if not specified
64 void setSize(int size_x, int size_y = -1);
67 * Set the size of the viewport
70 * @param height Defaults to width if not specified
72 void setViewSize(int width, int height = -1);
77 * Get size of squared texture
79 int size() const { return _size_x; }
82 * Set whether to use image coordinates or not.
84 * Default: origin == center of texture
85 * Image Coords: origin == top left corner
87 void useImageCoords(bool use = true);
90 * Enable/Disable using a stencil buffer
92 void useStencil(bool use = true);
95 * Set sampling parameters for mipmapping and coverage sampling
98 * @note color_samples is not allowed to be higher than coverage_samples
101 void setSampling( bool mipmapping,
102 int coverage_samples = 0,
103 int color_samples = 0 );
106 * Enable/Disable updating the texture (If disabled the contents of the
107 * texture remains with the outcome of the last rendering pass)
109 void setRender(bool render);
112 * Say if we can render to a texture.
113 * @return true if rtt is available
115 bool serviceable(void);
118 * Get the OSG camera for drawing this gauge.
120 osg::Camera* getCamera() const { return camera.get(); }
122 osg::Texture2D* getTexture() const { return texture.get(); }
124 // Real initialization function. Bad name.
125 void allocRT(osg::NodeCallback* camera_cull_callback = 0);
129 SystemAdapterPtr _system_adapter;
135 bool _use_image_coords,
139 // Multisampling parameters
140 int _coverage_samples,
144 osg::ref_ptr<osg::Camera> camera;
145 osg::ref_ptr<osg::Texture2D> texture;
147 void updateCoordinateFrame();
148 void updateStencil();
149 void updateSampling();
153 } // namespace canvas
154 } // namespace simgear
156 #endif // _SG_OD_GAUGE_HXX