fly/flightgear
1
0
Fork 0
Code Activity
flightgear/src/Canvas/canvas.cxx
Thomas Geymayer 7463ebad1d Canvas: Only use cull callback if it's still valid
2012-09-01 16:50:21 +02:00

463 lines
13 KiB
C++
Raw Blame History

// The canvas for rendering with the 2d api
//
// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
//
// This program 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 program 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.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#include "canvas.hxx"
#include "elements/group.hxx"
#include <Canvas/MouseEvent.hxx>
#include <Canvas/property_helper.hxx>
#include <Main/globals.hxx>
#include <Viewer/CameraGroup.hxx>
#include <Viewer/renderer.hxx>
#include <simgear/scene/util/RenderConstants.hxx>
#include <osg/Camera>
#include <osg/Geode>
#include <osgText/Text>
#include <osgViewer/Viewer>
#include <boost/algorithm/string/predicate.hpp>
#include <iostream>
//----------------------------------------------------------------------------
Canvas::CameraCullCallback::CameraCullCallback():
_render( true ),
_render_frame( 0 )
{
}
//----------------------------------------------------------------------------
void Canvas::CameraCullCallback::enableRendering()
{
_render = true;
}
//----------------------------------------------------------------------------
void Canvas::CameraCullCallback::operator()( osg::Node* node,
osg::NodeVisitor* nv )
{
if( !_render && nv->getTraversalNumber() != _render_frame )
return;
traverse(node, nv);
_render = false;
_render_frame = nv->getTraversalNumber();
}
//----------------------------------------------------------------------------
Canvas::CullCallback::CullCallback(CameraCullCallback* camera_cull):
_camera_cull( camera_cull )
{
}
//----------------------------------------------------------------------------
void Canvas::CullCallback::operator()( osg::Node* node,
osg::NodeVisitor* nv )
{
if( (nv->getTraversalMask() & simgear::MODEL_BIT) && _camera_cull.valid() )
_camera_cull->enableRendering();
traverse(node, nv);
}
//------------------------------------------------------------------------------
Canvas::Canvas(SGPropertyNode* node):
PropertyBasedElement(node),
_size_x(-1),
_size_y(-1),
_view_width(-1),
_view_height(-1),
_status(node, "status"),
_status_msg(node, "status-msg"),
_mouse_x(node, "mouse/x"),
_mouse_y(node, "mouse/y"),
_mouse_dx(node, "mouse/dx"),
_mouse_dy(node, "mouse/dy"),
_mouse_button(node, "mouse/button"),
_mouse_state(node, "mouse/state"),
_mouse_mod(node, "mouse/mod"),
_mouse_scroll(node, "mouse/scroll"),
_mouse_event(node, "mouse/event"),
_sampling_dirty(false),
_color_dirty(true),
_root_group( new canvas::Group(node) ),
_render_always(false)
{
// Remove automatically created property listener as we forward them on our
// own
_root_group->removeListener();
_status = 0;
setStatusFlags(MISSING_SIZE_X | MISSING_SIZE_Y);
_camera_callback = new CameraCullCallback;
_cull_callback = new CullCallback(_camera_callback);
canvas::linkColorNodes
(
"color-background",
_node,
_color_background,
osg::Vec4f(0,0,0,1)
);
}
//------------------------------------------------------------------------------
Canvas::~Canvas()
{
}
//------------------------------------------------------------------------------
void Canvas::update(double delta_time_sec)
{
if( !_texture.serviceable() )
{
if( _status != STATUS_OK )
return;
_texture.setSize(_size_x, _size_y);
_texture.useImageCoords(true);
_texture.useStencil(true);
_texture.allocRT(_camera_callback);
_texture.getCamera()->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f , 1.0f));
_texture.getCamera()->addChild(_root_group->getMatrixTransform());
if( _texture.serviceable() )
{
setStatusFlags(STATUS_OK);
}
else
{
setStatusFlags(CREATE_FAILED);
return;
}
}
_root_group->update(delta_time_sec);
if( _sampling_dirty )
{
_texture.setSampling(
_node->getBoolValue("mipmapping"),
_node->getIntValue("coverage-samples"),
_node->getIntValue("color-samples")
);
_sampling_dirty = false;
}
if( _color_dirty )
{
_texture.getCamera()->setClearColor
(
osg::Vec4( _color_background[0]->getFloatValue(),
_color_background[1]->getFloatValue(),
_color_background[2]->getFloatValue(),
_color_background[3]->getFloatValue() )
);
_color_dirty = false;
}
while( !_dirty_placements.empty() )
{
SGPropertyNode *node = _dirty_placements.back();
_dirty_placements.pop_back();
if( node->getIndex() >= static_cast<int>(_placements.size()) )
// New placement
_placements.resize(node->getIndex() + 1);
else
// Remove possibly existing placements
_placements[ node->getIndex() ].clear();
// Get new placements
PlacementFactoryMap::const_iterator placement_factory =
_placement_factories.find( node->getStringValue("type", "object") );
if( placement_factory != _placement_factories.end() )
{
canvas::Placements& placements =
_placements[ node->getIndex() ] =
placement_factory->second
(
node,
boost::static_pointer_cast<Canvas>(_self.lock())
);
node->setStringValue
(
"status-msg",
placements.empty() ? "No match" : "Ok"
);
}
else
node->setStringValue("status-msg", "Unknown placement type");
}
if( _render_always )
_camera_callback->enableRendering();
}
//------------------------------------------------------------------------------
void Canvas::setSizeX(int sx)
{
if( _size_x == sx )
return;
_size_x = sx;
// TODO resize if texture already allocated
if( _size_x <= 0 )
setStatusFlags(MISSING_SIZE_X);
else
setStatusFlags(MISSING_SIZE_X, false);
// reset flag to allow creation with new size
setStatusFlags(CREATE_FAILED, false);
}
//------------------------------------------------------------------------------
void Canvas::setSizeY(int sy)
{
if( _size_y == sy )
return;
_size_y = sy;
// TODO resize if texture already allocated
if( _size_y <= 0 )
setStatusFlags(MISSING_SIZE_Y);
else
setStatusFlags(MISSING_SIZE_Y, false);
// reset flag to allow creation with new size
setStatusFlags(CREATE_FAILED, false);
}
//------------------------------------------------------------------------------
void Canvas::setViewWidth(int w)
{
if( _view_width == w )
return;
_view_width = w;
_texture.setViewSize(_view_width, _view_height);
}
//------------------------------------------------------------------------------
void Canvas::setViewHeight(int h)
{
if( _view_height == h )
return;
_view_height = h;
_texture.setViewSize(_view_width, _view_height);
}
//------------------------------------------------------------------------------
bool Canvas::handleMouseEvent(const canvas::MouseEvent& event)
{
_mouse_x = event.x;
_mouse_y = event.y;
_mouse_dx = event.dx;
_mouse_dy = event.dy;
_mouse_button = event.button;
_mouse_state = event.state;
_mouse_mod = event.mod;
_mouse_scroll = event.scroll;
// Always set event type last because all listeners are attached to it
_mouse_event = event.type;
return _root_group->handleMouseEvent(event);
}
//------------------------------------------------------------------------------
void Canvas::childAdded( SGPropertyNode * parent,
SGPropertyNode * child )
{
if( parent != _node )
return;
if( child->getNameString() == "placement" )
_dirty_placements.push_back(child);
else
static_cast<canvas::Element*>(_root_group.get())
->childAdded(parent, child);
}
//------------------------------------------------------------------------------
void Canvas::childRemoved( SGPropertyNode * parent,
SGPropertyNode * child )
{
if( parent != _node )
return;
if( child->getNameString() == "placement" )
_placements[ child->getIndex() ].clear();
else
static_cast<canvas::Element*>(_root_group.get())
->childRemoved(parent, child);
}
//----------------------------------------------------------------------------
void Canvas::valueChanged(SGPropertyNode* node)
{
if( boost::starts_with(node->getNameString(), "status") )
return;
bool handled = true;
if( node->getParent()->getParent() == _node )
{
if( !_color_background.empty()
&& _color_background[0]->getParent() == node->getParent() )
{
_color_dirty = true;
}
else if( node->getParent()->getNameString() == "placement" )
{
// prevent double updates...
for( size_t i = 0; i < _dirty_placements.size(); ++i )
{
if( node->getParent() == _dirty_placements[i] )
return;
}
_dirty_placements.push_back(node->getParent());
}
else
handled = false;
}
else if( node->getParent() == _node )
{
if( node->getNameString() == "mipmapping"
|| node->getNameString() == "coverage-samples"
|| node->getNameString() == "color-samples" )
_sampling_dirty = true;
else if( node->getNameString() == "render-always" )
_render_always = node->getBoolValue();
else if( node->getNameString() == "size" )
{
if( node->getIndex() == 0 )
setSizeX( node->getIntValue() );
else if( node->getIndex() == 1 )
setSizeY( node->getIntValue() );
}
else if( node->getNameString() == "view" )
{
if( node->getIndex() == 0 )
setViewWidth( node->getIntValue() );
else if( node->getIndex() == 1 )
setViewHeight( node->getIntValue() );
}
else
handled = false;
}
else
handled = false;
if( !handled )
_root_group->valueChanged(node);
}
//------------------------------------------------------------------------------
osg::Texture2D* Canvas::getTexture() const
{
return _texture.getTexture();
}
//------------------------------------------------------------------------------
GLuint Canvas::getTexId() const
{
osg::Texture2D* tex = _texture.getTexture();
if( !tex )
return 0;
// osgViewer::Viewer::Contexts contexts;
// globals->get_renderer()->getViewer()->getContexts(contexts);
//
// if( contexts.empty() )
// return 0;
osg::Camera* guiCamera =
flightgear::getGUICamera(flightgear::CameraGroup::getDefault());
osg::State* state = guiCamera->getGraphicsContext()->getState(); //contexts[0]->getState();
if( !state )
return 0;
osg::Texture::TextureObject* tobj =
tex->getTextureObject( state->getContextID() );
if( !tobj )
return 0;
return tobj->_id;
}
//------------------------------------------------------------------------------
Canvas::CameraCullCallbackPtr Canvas::getCameraCullCallback() const
{
return _camera_callback;
}
//----------------------------------------------------------------------------
Canvas::CullCallbackPtr Canvas::getCullCallback() const
{
return _cull_callback;
}
//------------------------------------------------------------------------------
void Canvas::addPlacementFactory( const std::string& type,
canvas::PlacementFactory factory )
{
if( _placement_factories.find(type) != _placement_factories.end() )
SG_LOG
(
SG_GENERAL,
SG_WARN,
"Canvas::addPlacementFactory: replace existing factor for type " << type
);
_placement_factories[type] = factory;
}
//------------------------------------------------------------------------------
void Canvas::setStatusFlags(unsigned int flags, bool set)
{
if( set )
_status = _status | flags;
else
_status = _status & ~flags;
// TODO maybe extend simgear::PropertyObject to allow |=, &= etc.
if( (_status & MISSING_SIZE_X) && (_status & MISSING_SIZE_Y) )
_status_msg = "Missing size";
else if( _status & MISSING_SIZE_X )
_status_msg = "Missing size-x";
else if( _status & MISSING_SIZE_Y )
_status_msg = "Missing size-y";
else if( _status & CREATE_FAILED )
_status_msg = "Creating render target failed";
else if( _status == STATUS_OK && !_texture.serviceable() )
_status_msg = "Creation pending...";
else
_status_msg = "Ok";
}
//------------------------------------------------------------------------------
Canvas::PlacementFactoryMap Canvas::_placement_factories;
View git blame Copy permalink