Move FGODGauge from FlightGear to SimGear.
This is a first step for moving the Canvas system to SimGear to make it accessible to other applications (eg.FGRadar is going to use it)
This commit is contained in:
Thomas Geymayer
parent
e24e3c0612
commit
f191b4f35c
@ -24,6 +24,7 @@ foreach( mylibfolder
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endforeach( mylibfolder )
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endforeach( mylibfolder )
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if(NOT SIMGEAR_HEADLESS)
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if(NOT SIMGEAR_HEADLESS)
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add_subdirectory(canvas)
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add_subdirectory(environment)
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add_subdirectory(environment)
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add_subdirectory(screen)
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add_subdirectory(screen)
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add_subdirectory(scene)
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add_subdirectory(scene)
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11
simgear/canvas/CMakeLists.txt
Normal file
11
simgear/canvas/CMakeLists.txt
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@ -0,0 +1,11 @@
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include (SimGearComponent)
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set(HEADERS
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ODGauge.hxx
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)
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set(SOURCES
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ODGauge.cxx
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)
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simgear_scene_component(canvas canvas "${SOURCES}" "${HEADERS}")
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276
simgear/canvas/ODGauge.cxx
Normal file
276
simgear/canvas/ODGauge.cxx
Normal file
@ -0,0 +1,276 @@
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// Owner Drawn Gauge helper class
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//
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// Written by Harald JOHNSEN, started May 2005.
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//
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// Copyright (C) 2005 Harald JOHNSEN
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//
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// Ported to OSG by Tim Moore - Jun 2007
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//
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// Heavily modified to be usable for the 2d Canvas by Thomas Geymayer - April 2012
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// Supports now multisampling/mipmapping, usage of the stencil buffer and placing
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// the texture in the scene by certain filter criteria
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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//
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#ifdef HAVE_CONFIG_H
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# include <simgear_config.h>
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#endif
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#include <osg/Texture2D>
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#include <osg/AlphaFunc>
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#include <osg/BlendFunc>
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#include <osg/Camera>
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#include <osg/Matrix>
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#include <osg/PolygonMode>
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#include <osg/ShadeModel>
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#include <osg/StateSet>
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#include <osg/FrameBufferObject> // for GL_DEPTH_STENCIL_EXT on Windows
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#include <simgear/debug/logstream.hxx>
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#include <simgear/scene/util/RenderConstants.hxx>
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#include "ODGauge.hxx"
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#include <cassert>
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namespace simgear
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{
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//------------------------------------------------------------------------------
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ODGauge::ODGauge( const CameraRegistrationCallback& cb_camera_add,
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const CameraRegistrationCallback& cb_camera_remove ):
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_size_x( -1 ),
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_size_y( -1 ),
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_view_width( -1 ),
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_view_height( -1 ),
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_use_image_coords( false ),
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_use_stencil( false ),
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_use_mipmapping( false ),
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_coverage_samples( 0 ),
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_color_samples( 0 ),
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rtAvailable( false ),
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_cb_cam_add( cb_camera_add ),
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_cb_cam_remove( cb_camera_remove )
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{
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}
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//------------------------------------------------------------------------------
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ODGauge::~ODGauge()
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{
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if( camera.valid() )
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_cb_cam_remove(camera.get());
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}
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//------------------------------------------------------------------------------
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void ODGauge::setSize(int size_x, int size_y)
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{
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_size_x = size_x;
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_size_y = size_y < 0 ? size_x : size_y;
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if( texture.valid() )
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texture->setTextureSize(_size_x, _size_x);
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}
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//----------------------------------------------------------------------------
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void ODGauge::setViewSize(int width, int height)
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{
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_view_width = width;
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_view_height = height < 0 ? width : height;
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if( camera )
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updateCoordinateFrame();
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}
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//------------------------------------------------------------------------------
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void ODGauge::useImageCoords(bool use)
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{
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if( use == _use_image_coords )
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return;
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_use_image_coords = use;
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if( texture )
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updateCoordinateFrame();
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}
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//------------------------------------------------------------------------------
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void ODGauge::useStencil(bool use)
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{
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if( use == _use_stencil )
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return;
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_use_stencil = use;
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if( texture )
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updateStencil();
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}
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//------------------------------------------------------------------------------
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void ODGauge::setSampling( bool mipmapping,
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int coverage_samples,
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int color_samples )
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{
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if( _use_mipmapping == mipmapping
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&& _coverage_samples == coverage_samples
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&& _color_samples == color_samples )
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return;
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_use_mipmapping = mipmapping;
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if( color_samples > coverage_samples )
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{
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SG_LOG
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(
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SG_GL,
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SG_WARN,
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"ODGauge::setSampling: color_samples > coverage_samples not allowed!"
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);
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color_samples = coverage_samples;
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}
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_coverage_samples = coverage_samples;
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_color_samples = color_samples;
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updateSampling();
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}
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//------------------------------------------------------------------------------
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void ODGauge::setRender(bool render)
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{
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// Only the far camera should trigger this texture to be rendered.
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camera->setNodeMask(render ? simgear::BACKGROUND_BIT : 0);
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}
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//------------------------------------------------------------------------------
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bool ODGauge::serviceable(void)
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{
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return rtAvailable;
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}
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//------------------------------------------------------------------------------
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void ODGauge::allocRT(osg::NodeCallback* camera_cull_callback)
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{
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camera = new osg::Camera;
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camera->setDataVariance(osg::Object::DYNAMIC);
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camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
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camera->setRenderOrder(osg::Camera::PRE_RENDER);
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camera->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f , 0.0f));
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camera->setClearStencil(0);
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camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT,
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osg::Camera::FRAME_BUFFER );
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if( camera_cull_callback )
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camera->setCullCallback(camera_cull_callback);
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setRender(true);
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updateCoordinateFrame();
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updateStencil();
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osg::StateSet* stateSet = camera->getOrCreateStateSet();
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stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
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stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
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stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
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stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
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stateSet->setAttributeAndModes(new osg::PolygonMode(osg::PolygonMode::FRONT_AND_BACK,
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osg::PolygonMode::FILL),
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osg::StateAttribute::ON);
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stateSet->setAttributeAndModes(new osg::AlphaFunc(osg::AlphaFunc::GREATER,
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0.0f),
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osg::StateAttribute::ON);
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stateSet->setAttribute(new osg::ShadeModel(osg::ShadeModel::FLAT));
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stateSet->setAttributeAndModes(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
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osg::BlendFunc::ONE_MINUS_SRC_ALPHA),
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osg::StateAttribute::ON);
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if( !texture )
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{
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texture = new osg::Texture2D;
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texture->setTextureSize(_size_x, _size_y);
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texture->setInternalFormat(GL_RGBA);
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}
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updateSampling();
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_cb_cam_add(camera.get());
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rtAvailable = true;
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}
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//------------------------------------------------------------------------------
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void ODGauge::updateCoordinateFrame()
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{
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assert( camera );
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if( _view_width < 0 )
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_view_width = _size_x;
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if( _view_height < 0 )
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_view_height = _size_y;
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camera->setViewport(0, 0, _size_x, _size_y);
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if( _use_image_coords )
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camera->setProjectionMatrix(
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osg::Matrix::ortho2D(0, _view_width, _view_height, 0)
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);
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else
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camera->setProjectionMatrix(
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osg::Matrix::ortho2D( -_view_width/2., _view_width/2.,
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-_view_height/2., _view_height/2. )
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);
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}
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//------------------------------------------------------------------------------
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void ODGauge::updateStencil()
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{
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assert( camera );
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GLbitfield mask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
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if( _use_stencil)
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{
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camera->attach( osg::Camera::PACKED_DEPTH_STENCIL_BUFFER,
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GL_DEPTH_STENCIL_EXT );
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mask |= GL_STENCIL_BUFFER_BIT;
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}
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else
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{
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camera->detach(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER);
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}
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camera->setClearMask(mask);
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}
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//------------------------------------------------------------------------------
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void ODGauge::updateSampling()
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{
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assert( camera );
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assert( texture );
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texture->setFilter(
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osg::Texture2D::MIN_FILTER,
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_use_mipmapping ? osg::Texture2D::LINEAR_MIPMAP_LINEAR
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: osg::Texture2D::LINEAR
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);
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camera->attach(
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osg::Camera::COLOR_BUFFER,
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texture.get(),
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0, 0,
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_use_mipmapping,
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_coverage_samples,
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_color_samples
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);
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}
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} // namespace simgear
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156
simgear/canvas/ODGauge.hxx
Normal file
156
simgear/canvas/ODGauge.hxx
Normal file
@ -0,0 +1,156 @@
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// Owner Drawn Gauge helper class
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//
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// Written by Harald JOHNSEN, started May 2005.
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//
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// Copyright (C) 2005 Harald JOHNSEN - hjohnsen@evc.net
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//
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// Ported to OSG by Tim Moore - Jun 2007
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|
//
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|
// Heavily modified to be usable for the 2d Canvas by Thomas Geymayer - April 2012
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// Supports now multisampling/mipmapping, usage of the stencil buffer and placing
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|
// the texture in the scene by certain filter criteria
|
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|
//
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|
// This program is free software; you can redistribute it and/or
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|
// modify it under the terms of the GNU General Public License as
|
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|
// published by the Free Software Foundation; either version 2 of the
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|
// License, or (at your option) any later version.
|
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|
//
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|
// This program is distributed in the hope that it will be useful, but
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|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
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|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
// General Public License for more details.
|
||||||
|
//
|
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|
// You should have received a copy of the GNU General Public License
|
||||||
|
// along with this program; if not, write to the Free Software
|
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|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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//
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#ifndef _SG_OD_GAUGE_HXX
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#define _SG_OD_GAUGE_HXX
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#include <osg/NodeCallback>
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#include <osg/Group>
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#include <boost/function.hpp>
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namespace osg
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{
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class Camera;
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class Texture2D;
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}
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namespace simgear
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{
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/**
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* Owner Drawn Gauge (aka render-to-texture) helper class
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*/
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class ODGauge
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{
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public:
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typedef boost::function<void(osg::Camera*)> CameraRegistrationCallback;
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ODGauge( const CameraRegistrationCallback& cb_camera_add,
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const CameraRegistrationCallback& cb_camera_remove );
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virtual ~ODGauge();
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|
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/**
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* Set the size of the render target.
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*
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* @param size_x X size
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* @param size_y Y size. Defaults to size_x if not specified
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*/
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void setSize(int size_x, int size_y = -1);
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|
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/**
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* Set the size of the viewport
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*
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* @param width
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* @param height Defaults to width if not specified
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*/
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void setViewSize(int width, int height = -1);
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|
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/**
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* DEPRECATED
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*
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* Get size of squared texture
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*/
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int size() const { return _size_x; }
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/**
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* Set whether to use image coordinates or not.
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*
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* Default: origin == center of texture
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* Image Coords: origin == top left corner
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*/
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void useImageCoords(bool use = true);
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|
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|
/**
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* Enable/Disable using a stencil buffer
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|
*/
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void useStencil(bool use = true);
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|
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|
/**
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* Set sampling parameters for mipmapping and coverage sampling
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* antialiasing.
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*
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* @note color_samples is not allowed to be higher than coverage_samples
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*
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*/
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void setSampling( bool mipmapping,
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int coverage_samples = 0,
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int color_samples = 0 );
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|
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/**
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* Enable/Disable updating the texture (If disabled the contents of the
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* texture remains with the outcome of the last rendering pass)
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*/
|
||||||
|
void setRender(bool render);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Say if we can render to a texture.
|
||||||
|
* @return true if rtt is available
|
||||||
|
*/
|
||||||
|
bool serviceable(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* 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);
|
||||||
|
|
||||||
|
private:
|
||||||
|
|
||||||
|
int _size_x,
|
||||||
|
_size_y,
|
||||||
|
_view_width,
|
||||||
|
_view_height;
|
||||||
|
bool _use_image_coords,
|
||||||
|
_use_stencil,
|
||||||
|
_use_mipmapping;
|
||||||
|
|
||||||
|
// Multisampling parameters
|
||||||
|
int _coverage_samples,
|
||||||
|
_color_samples;
|
||||||
|
|
||||||
|
bool rtAvailable;
|
||||||
|
osg::ref_ptr<osg::Camera> camera;
|
||||||
|
osg::ref_ptr<osg::Texture2D> texture;
|
||||||
|
|
||||||
|
CameraRegistrationCallback _cb_cam_add,
|
||||||
|
_cb_cam_remove;
|
||||||
|
|
||||||
|
void updateCoordinateFrame();
|
||||||
|
void updateStencil();
|
||||||
|
void updateSampling();
|
||||||
|
|
||||||
|
};
|
||||||
|
|
||||||
|
} // namespace simgear
|
||||||
|
|
||||||
|
#endif // _SG_OD_GAUGE_HXX
|
||||||
Loading…
Reference in New Issue
Block a user