/usr/include/simgear/canvas/ODGauge.hxx is in libsimgear-dev 3.0.0-6+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 | // Owner Drawn Gauge helper class
//
// Written by Harald JOHNSEN, started May 2005.
//
// Copyright (C) 2005 Harald JOHNSEN - hjohnsen@evc.net
//
// Ported to OSG by Tim Moore - Jun 2007
//
// Heavily modified to be usable for the 2d Canvas by Thomas Geymayer - April 2012
// Supports now multisampling/mipmapping, usage of the stencil buffer and placing
// the texture in the scene by certain filter criteria
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
#ifndef _SG_OD_GAUGE_HXX
#define _SG_OD_GAUGE_HXX
#include "canvas_fwd.hxx"
#include <osg/NodeCallback>
#include <osg/Group>
namespace osg
{
class Camera;
class Texture2D;
}
namespace simgear
{
namespace canvas
{
/**
* Owner Drawn Gauge (aka render-to-texture) helper class
*/
class ODGauge
{
public:
ODGauge();
virtual ~ODGauge();
/**
* Set the size of the render target.
*
* @param size_x X size
* @param size_y Y size. Defaults to size_x if not specified
*/
void setSize(int size_x, int size_y = -1);
/**
* Set the size of the viewport
*
* @param width
* @param height Defaults to width if not specified
*/
void setViewSize(int width, int height = -1);
osg::Vec2s getViewSize() const;
/**
* DEPRECATED
*
* Get size of squared texture
*/
int size() const { return _size_x; }
/**
* Set whether to use image coordinates or not.
*
* Default: origin == center of texture
* Image Coords: origin == top left corner
*/
void useImageCoords(bool use = true);
/**
* Enable/Disable using a stencil buffer
*/
void useStencil(bool use = true);
/**
* Enable/Disable additive alpha blending (Can improve results with
* transparent background)
*/
void useAdditiveBlend(bool use = true);
/**
* Set sampling parameters for mipmapping and coverage sampling
* antialiasing.
*
* @note color_samples is not allowed to be higher than coverage_samples
*
*/
void setSampling( bool mipmapping,
int coverage_samples = 0,
int color_samples = 0 );
/**
* Enable/Disable updating the texture (If disabled the contents of the
* texture remains with the outcome of the last rendering pass)
*/
void setRender(bool render);
/**
* Say if we can render to a texture.
* @return true if rtt is available
*/
bool serviceable() const;
/**
* Get the OSG camera for drawing this gauge.
*/
osg::Camera* getCamera() const { return camera.get(); }
osg::Texture2D* getTexture() const { return texture.get(); }
// Real initialization function. Bad name.
void allocRT(osg::NodeCallback* camera_cull_callback = 0);
void reinit();
void clear();
protected:
int _size_x,
_size_y,
_view_width,
_view_height;
enum Flags
{
AVAILABLE = 1,
USE_IMAGE_COORDS = AVAILABLE << 1,
USE_STENCIL = USE_IMAGE_COORDS << 1,
USE_MIPMAPPING = USE_STENCIL << 1,
USE_ADDITIVE_BLEND = USE_MIPMAPPING << 1
};
uint32_t _flags;
// Multisampling parameters
int _coverage_samples,
_color_samples;
osg::ref_ptr<osg::Camera> camera;
osg::ref_ptr<osg::Texture2D> texture;
bool updateFlag(Flags flag, bool enable);
void updateCoordinateFrame();
void updateStencil();
void updateSampling();
void updateBlendMode();
};
} // namespace canvas
} // namespace simgear
#endif // _SG_OD_GAUGE_HXX
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