//
// Written by Harald JOHNSEN, started May 2005.
//
-// Copyright (C) 2005 Harald JOHNSEN - hjohnsen@evc.net
+// Copyright (C) 2005 Harald JOHNSEN
+//
+// 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 program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
-// Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//
-#include <plib/ssg.h>
-#include <simgear/screen/extensions.hxx>
-#include <simgear/screen/RenderTexture.h>
-#include <simgear/debug/logstream.hxx>
-#include SG_GLU_H
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <osg/Texture2D>
+#include <osg/AlphaFunc>
+#include <osg/BlendFunc>
+#include <osg/Camera>
+#include <osg/Geode>
+#include <osg/NodeVisitor>
+#include <osg/Matrix>
+#include <osg/PolygonMode>
+#include <osg/ShadeModel>
+#include <osg/StateSet>
+#include <osg/FrameBufferObject> // for GL_DEPTH_STENCIL_EXT on Windows
+
+#include <osgDB/FileNameUtils>
+
+#include <simgear/scene/material/EffectGeode.hxx>
+#include <simgear/scene/util/RenderConstants.hxx>
#include <Main/globals.hxx>
+#include <Viewer/renderer.hxx>
#include <Scenery/scenery.hxx>
#include "od_gauge.hxx"
-FGODGauge::FGODGauge() :
- rtAvailable( false ),
- rt( 0 )
+#include <cassert>
+
+//------------------------------------------------------------------------------
+FGODGauge::FGODGauge():
+ _size_x( -1 ),
+ _size_y( -1 ),
+ _view_width( -1 ),
+ _view_height( -1 ),
+ _use_image_coords( false ),
+ _use_stencil( false ),
+ _use_mipmapping( false ),
+ _coverage_samples( 0 ),
+ _color_samples( 0 ),
+ rtAvailable( false )
{
}
-// done here and not in init() so we don't allocate a rendering context if it is
-// never used
-void FGODGauge::allocRT () {
- GLint colorBits = 0;
- glGetIntegerv( GL_BLUE_BITS, &colorBits );
- textureWH = 256;
- rt = new RenderTexture();
- if( colorBits < 8 )
- rt->Reset("rgba=5,5,5,1 ctt");
- else
- rt->Reset("rgba ctt");
-
- if( rt->Initialize(256, 256, true) ) {
- SG_LOG(SG_ALL, SG_INFO, "FGODGauge:Initialize sucessfull");
- if (rt->BeginCapture())
- {
- SG_LOG(SG_ALL, SG_INFO, "FGODGauge:BeginCapture sucessfull, RTT available");
- rtAvailable = true;
- glViewport(0, 0, textureWH, textureWH);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluOrtho2D( -256.0, 256.0, -256.0, 256.0 );
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glDisable(GL_LIGHTING);
- glEnable(GL_COLOR_MATERIAL);
- glDisable(GL_CULL_FACE);
- glDisable(GL_FOG);
- glDisable(GL_DEPTH_TEST);
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
- glBindTexture(GL_TEXTURE_2D, 0);
- glEnable(GL_TEXTURE_2D);
- glEnable(GL_ALPHA_TEST);
- glAlphaFunc(GL_GREATER, 0.0f);
- glDisable(GL_SMOOTH);
- glEnable(GL_BLEND);
- glBlendFunc( GL_ONE, GL_ONE_MINUS_SRC_ALPHA );
- rt->EndCapture();
- } else
- SG_LOG(SG_ALL, SG_WARN, "FGODGauge:BeginCapture failed, RTT not available, using backbuffer");
- } else
- SG_LOG(SG_ALL, SG_WARN, "FGODGauge:Initialize failed, RTT not available, using backbuffer");
+//------------------------------------------------------------------------------
+FGODGauge::~FGODGauge()
+{
+ if( camera.valid() )
+ globals->get_renderer()->removeCamera(camera.get());
}
-FGODGauge::~FGODGauge() {
- delete rt;
+//------------------------------------------------------------------------------
+void FGODGauge::setSize(int size_x, int size_y)
+{
+ _size_x = size_x;
+ _size_y = size_y < 0 ? size_x : size_y;
+
+ if( texture.valid() )
+ texture->setTextureSize(_size_x, _size_x);
}
-void FGODGauge::init () {
+//----------------------------------------------------------------------------
+void FGODGauge::setViewSize(int width, int height)
+{
+ _view_width = width;
+ _view_height = height < 0 ? width : height;
+
+ if( camera )
+ updateCoordinateFrame();
}
-void FGODGauge::update (double dt) {
+//------------------------------------------------------------------------------
+void FGODGauge::useImageCoords(bool use)
+{
+ if( use == _use_image_coords )
+ return;
+
+ _use_image_coords = use;
+
+ if( texture )
+ updateCoordinateFrame();
}
-void FGODGauge::beginCapture(int viewSize) {
- if( ! rt )
- allocRT();
- if(rtAvailable) {
- rt->BeginCapture();
- }
- else
- set2D();
- textureWH = viewSize;
- glViewport(0, 0, textureWH, textureWH);
+//------------------------------------------------------------------------------
+void FGODGauge::useStencil(bool use)
+{
+ if( use == _use_stencil )
+ return;
+
+ _use_stencil = use;
+
+ if( texture )
+ updateStencil();
}
-void FGODGauge::beginCapture(void) {
- if( ! rt )
- allocRT();
- if(rtAvailable) {
- rt->BeginCapture();
- }
- else
- set2D();
+//------------------------------------------------------------------------------
+void FGODGauge::setSampling( bool mipmapping,
+ int coverage_samples,
+ int color_samples )
+{
+ if( _use_mipmapping == mipmapping
+ && _coverage_samples == coverage_samples
+ && _color_samples == color_samples )
+ return;
+
+ _use_mipmapping = mipmapping;
+
+ if( color_samples > coverage_samples )
+ {
+ SG_LOG
+ (
+ SG_GL,
+ SG_WARN,
+ "FGODGauge::setSampling: color_samples > coverage_samples not allowed!"
+ );
+ color_samples = coverage_samples;
+ }
+
+ _coverage_samples = coverage_samples;
+ _color_samples = color_samples;
+
+ updateSampling();
}
-void FGODGauge::Clear(void) {
- if(rtAvailable) {
- glClear(GL_COLOR_BUFFER_BIT);
- }
- else {
- glDisable(GL_BLEND);
- glDisable(GL_ALPHA_TEST);
- glColor4f(0.0f, 0.0f, 0.0f, 0.0f);
- glRectf(-256.0, -256.0, 256.0, 256.0);
- glEnable(GL_BLEND);
- glBlendFunc( GL_ONE, GL_ONE_MINUS_SRC_ALPHA );
- glEnable(GL_ALPHA_TEST);
- }
+//------------------------------------------------------------------------------
+bool FGODGauge::serviceable(void)
+{
+ return rtAvailable;
+}
+
+//------------------------------------------------------------------------------
+void FGODGauge::allocRT(osg::NodeCallback* camera_cull_callback)
+{
+ camera = new osg::Camera;
+ camera->setDataVariance(osg::Object::DYNAMIC);
+ // Only the far camera should trigger this texture to be rendered.
+ camera->setNodeMask(simgear::BACKGROUND_BIT);
+ camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
+ camera->setRenderOrder(osg::Camera::PRE_RENDER);
+ camera->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f , 0.0f));
+ camera->setClearStencil(0);
+ camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT,
+ osg::Camera::FRAME_BUFFER );
+
+ if( camera_cull_callback )
+ camera->setCullCallback(camera_cull_callback);
+
+ updateCoordinateFrame();
+ updateStencil();
+
+ osg::StateSet* stateSet = camera->getOrCreateStateSet();
+ stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
+ stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
+ stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
+ stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
+ stateSet->setAttributeAndModes(new osg::PolygonMode(osg::PolygonMode::FRONT_AND_BACK,
+ osg::PolygonMode::FILL),
+ osg::StateAttribute::ON);
+ stateSet->setAttributeAndModes(new osg::AlphaFunc(osg::AlphaFunc::GREATER,
+ 0.0f),
+ osg::StateAttribute::ON);
+ stateSet->setAttribute(new osg::ShadeModel(osg::ShadeModel::FLAT));
+ stateSet->setAttributeAndModes(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
+ osg::BlendFunc::ONE_MINUS_SRC_ALPHA),
+ osg::StateAttribute::ON);
+ if( !texture )
+ {
+ texture = new osg::Texture2D;
+ texture->setTextureSize(_size_x, _size_y);
+ texture->setInternalFormat(GL_RGBA);
+ }
+
+ updateSampling();
+
+ globals->get_renderer()->addCamera(camera.get(), false);
+ rtAvailable = true;
}
-void FGODGauge::endCapture(GLuint texID) {
- glBindTexture(GL_TEXTURE_2D, texID);
- glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, textureWH, textureWH);
- if(rtAvailable)
- rt->EndCapture();
- else
- set3D();
+//------------------------------------------------------------------------------
+void FGODGauge::updateCoordinateFrame()
+{
+ assert( camera );
+
+ if( _view_width < 0 )
+ _view_width = _size_x;
+ if( _view_height < 0 )
+ _view_height = _size_y;
+
+ camera->setViewport(0, 0, _size_x, _size_y);
+
+ if( _use_image_coords )
+ camera->setProjectionMatrix(
+ osg::Matrix::ortho2D(0, _view_width, _view_height, 0)
+ );
+ else
+ camera->setProjectionMatrix(
+ osg::Matrix::ortho2D( -_view_width/2., _view_width/2.,
+ -_view_height/2., _view_height/2. )
+ );
}
-void FGODGauge::setSize(int viewSize) {
- textureWH = viewSize;
- glViewport(0, 0, textureWH, textureWH);
+//------------------------------------------------------------------------------
+void FGODGauge::updateStencil()
+{
+ assert( camera );
+
+ GLbitfield mask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
+
+ if( _use_stencil)
+ {
+ camera->attach( osg::Camera::PACKED_DEPTH_STENCIL_BUFFER,
+ GL_DEPTH_STENCIL_EXT );
+ mask |= GL_STENCIL_BUFFER_BIT;
+ }
+ else
+ {
+ camera->detach(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER);
+ }
+
+ camera->setClearMask(mask);
}
-bool FGODGauge::serviceable(void) {
- return rtAvailable;
+//------------------------------------------------------------------------------
+void FGODGauge::updateSampling()
+{
+ assert( camera );
+ assert( texture );
+
+ texture->setFilter(
+ osg::Texture2D::MIN_FILTER,
+ _use_mipmapping ? osg::Texture2D::LINEAR_MIPMAP_NEAREST
+ : osg::Texture2D::LINEAR
+ );
+ camera->attach(
+ osg::Camera::COLOR_BUFFER,
+ texture.get(),
+ 0, 0,
+ _use_mipmapping,
+ _coverage_samples,
+ _color_samples
+ );
}
/**
- * Locate a texture SSG node in a branch.
+ * Replace a texture in the airplane model with the gauge texture.
*/
-static ssgTexture *
-find_texture_node (ssgEntity * node, const char * name)
+class ReplaceStaticTextureVisitor:
+ public osg::NodeVisitor
{
- if( node->isA( ssgTypeTexture() ) ) {
- ssgTexture *tex = (ssgTexture *) node;
- char * texture_name = tex->getFilename();
- if (texture_name != 0 && !strcmp(name, texture_name))
- return tex;
- }
- else if (node->isAKindOf(ssgTypeBranch())) {
- int nKids = node->getNumKids();
- for (int i = 0; i < nKids; i++) {
- ssgTexture * result =
- find_texture_node(((ssgBranch*)node)->getKid(i), name);
- if (result != 0)
- return result;
+ public:
+
+ ReplaceStaticTextureVisitor( const char* name,
+ osg::Texture2D* new_texture ):
+ osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
+ _tex_name( osgDB::getSimpleFileName(name) ),
+ _new_texture(new_texture)
+ {}
+
+ ReplaceStaticTextureVisitor( const SGPropertyNode* placement,
+ osg::Texture2D* new_texture,
+ osg::NodeCallback* cull_callback = 0 ):
+ osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
+ _tex_name( osgDB::getSimpleFileName(
+ placement->getStringValue("texture"))
+ ),
+ _node_name( placement->getStringValue("node") ),
+ _parent_name( placement->getStringValue("parent") ),
+ _new_texture(new_texture),
+ _cull_callback(cull_callback)
+ {
+ if( _tex_name.empty()
+ && _node_name.empty()
+ && _parent_name.empty() )
+ SG_LOG
+ (
+ SG_GL,
+ SG_WARN,
+ "No filter criterion for replacing texture. "
+ " Every texture will be replaced!"
+ );
}
- }
- return 0;
-}
-void FGODGauge::set_texture(const char * name, GLuint new_texture) {
- ssgEntity * root = globals->get_scenery()->get_aircraft_branch();
- ssgTexture * node = find_texture_node( root, name );
- if( node )
- node->setHandle( new_texture );
-}
+ /**
+ * Get a list of groups which have been inserted into the scene graph to
+ * replace the given texture
+ */
+ Placements& getPlacements()
+ {
+ return _placements;
+ }
+
+ virtual void apply(osg::Geode& node)
+ {
+ simgear::EffectGeode* eg = dynamic_cast<simgear::EffectGeode*>(&node);
+ if( !eg )
+ return;
+
+ osg::StateSet* ss = eg->getEffect()->getDefaultStateSet();
+ if( !ss )
+ return;
+
+ osg::Group *parent = node.getParent(0);
+ if( !_node_name.empty() && parent->getName() != _node_name )
+ return;
+
+ if( !_parent_name.empty() )
+ {
+ // Traverse nodes upwards starting at the parent node (skip current
+ // node)
+ const osg::NodePath& np = getNodePath();
+ bool found = false;
+ for( int i = static_cast<int>(np.size()) - 2; i >= 0; --i )
+ {
+ const osg::Node* path_segment = np[i];
+ const osg::Node* path_parent = path_segment->getParent(0);
+
+ // A node without a name is always the parent of the root node of
+ // the model just containing the file name
+ if( path_parent && path_parent->getName().empty() )
+ return;
+
+ if( path_segment->getName() == _parent_name )
+ {
+ found = true;
+ break;
+ }
+ }
+
+ if( !found )
+ return;
+ }
+
+ for( size_t unit = 0; unit < ss->getNumTextureAttributeLists(); ++unit )
+ {
+ osg::Texture2D* tex = dynamic_cast<osg::Texture2D*>
+ (
+ ss->getTextureAttribute(unit, osg::StateAttribute::TEXTURE)
+ );
+
+ if( !tex || !tex->getImage() || tex == _new_texture )
+ continue;
+
+ if( !_tex_name.empty() )
+ {
+ std::string tex_name = tex->getImage()->getFileName();
+ std::string tex_name_simple = osgDB::getSimpleFileName(tex_name);
+ if( !osgDB::equalCaseInsensitive(_tex_name, tex_name_simple) )
+ continue;
+ }
+
+ // insert a new group between the geode an it's parent which overrides
+ // the texture
+ osg::ref_ptr<osg::Group> group = new osg::Group;
+ group->setName("canvas texture group");
+ group->addChild(eg);
+ parent->removeChild(eg);
+ parent->addChild(group);
+
+ if( _cull_callback )
+ group->setCullCallback(_cull_callback);
-void FGODGauge::set2D() {
- glPushAttrib ( GL_ENABLE_BIT | GL_VIEWPORT_BIT | GL_TRANSFORM_BIT | GL_LIGHTING_BIT ) ;
-
- glDisable(GL_LIGHTING);
- glEnable(GL_COLOR_MATERIAL);
- glDisable(GL_CULL_FACE);
- glDisable(GL_FOG);
- glDisable(GL_DEPTH_TEST);
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glEnable(GL_TEXTURE_2D);
- glDisable(GL_SMOOTH);
- glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
- glBindTexture(GL_TEXTURE_2D, 0);
-
- glViewport ( 0, 0, textureWH, textureWH ) ;
- glMatrixMode ( GL_PROJECTION ) ;
- glPushMatrix () ;
- glLoadIdentity () ;
- gluOrtho2D( -256.0, 256.0, -256.0, 256.0 );
- glMatrixMode ( GL_MODELVIEW ) ;
- glPushMatrix () ;
- glLoadIdentity () ;
-
- glAlphaFunc(GL_GREATER, 0.0f);
+ _placements.push_back(group);
+ osg::StateSet* stateSet = group->getOrCreateStateSet();
+ stateSet->setTextureAttribute( unit, _new_texture,
+ osg::StateAttribute::OVERRIDE );
+ stateSet->setTextureMode( unit, GL_TEXTURE_2D,
+ osg::StateAttribute::ON );
+
+ SG_LOG
+ (
+ SG_GL,
+ SG_INFO,
+ "Replaced texture '" << _tex_name << "'"
+ << " for object '" << parent->getName() << "'"
+ << (!_parent_name.empty() ? " with parent '" + _parent_name + "'"
+ : "")
+ );
+ return;
+ }
+ }
+
+
+
+ protected:
+
+ std::string _tex_name, ///<! Name of texture to be replaced
+ _node_name, ///<! Only replace if node name matches
+ _parent_name; ///<! Only replace if any parent node matches
+ /// given name (all the tree upwards)
+ osg::Texture2D *_new_texture;
+ osg::NodeCallback *_cull_callback;
+
+ Placements _placements;
+};
+
+//------------------------------------------------------------------------------
+ Placements FGODGauge::set_texture(const char* name, osg::Texture2D* new_texture)
+{
+ osg::Group* root = globals->get_scenery()->get_aircraft_branch();
+ ReplaceStaticTextureVisitor visitor(name, new_texture);
+ root->accept(visitor);
+ return visitor.getPlacements();
}
-void FGODGauge::set3D() {
- glMatrixMode ( GL_PROJECTION ) ;
- glPopMatrix () ;
- glMatrixMode ( GL_MODELVIEW ) ;
- glPopMatrix () ;
- glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
- glPopAttrib () ;
+//------------------------------------------------------------------------------
+Placements FGODGauge::set_texture( const SGPropertyNode* placement,
+ osg::Texture2D* new_texture,
+ osg::NodeCallback* cull_callback )
+{
+ osg::Group* root = globals->get_scenery()->get_aircraft_branch();
+ ReplaceStaticTextureVisitor visitor(placement, new_texture, cull_callback);
+ root->accept(visitor);
+ return visitor.getPlacements();
}
projects / flightgear.git / blobdiff