void DepthPeelBin::drawFSTP( osg::RenderInfo& renderInfo, osg::State& state, osg::GL2Extensions* ext, PerContextInfo& pci,
GLint& fstpLoc, GLint& texturePercentLoc )
{
TRACEDUMP("DepthPeelBin::drawFSTP");
// Set up the program and uniforms.
state.applyAttribute( _fstpProgram.get() );
if( fstpLoc < 0 )
#if OSG_SUPPORTS_UNIFORM_ID
fstpLoc = state.getUniformLocation( _fstpUniform->getNameID() );
#else
fstpLoc = state.getUniformLocation( _fstpUniform->getName() );
#endif
_fstpUniform->apply( ext, fstpLoc );
if( texturePercentLoc < 0 )
#if OSG_SUPPORTS_UNIFORM_ID
texturePercentLoc = state.getUniformLocation( _texturePercentUniform->getNameID() );
#else
texturePercentLoc = state.getUniformLocation( _texturePercentUniform->getName() );
#endif
_texturePercentUniform->apply( ext, texturePercentLoc );
state.setActiveTextureUnit( s_textureUnit+1 );
glBindTexture( GL_TEXTURE_2D, pci._colorTex );
state.applyAttribute( _fstpBlendFunc.get() );
state.applyMode( GL_BLEND, true );
state.applyMode( GL_DEPTH_TEST, false );
_fstp->draw( renderInfo );
state.setActiveTextureUnit( s_textureUnit+1 );
glBindTexture( GL_TEXTURE_2D, 0 );
}
void
MPGeometry::renderPrimitiveSets(osg::State& state,
bool renderColor,
bool usingVBOs) const
{
// check the map frame to see if it's up to date
if ( _frame.needsSync() )
{
// this lock protects a MapFrame sync when we have multiple DRAW threads.
Threading::ScopedMutexLock exclusive( _frameSyncMutex );
if ( _frame.needsSync() && _frame.sync() ) // always double check
{
// This should only happen is the layer ordering changes;
// If layers are added or removed, the Tile gets rebuilt and
// the point is moot.
std::vector<Layer> reordered;
const ImageLayerVector& layers = _frame.imageLayers();
reordered.reserve( layers.size() );
for( ImageLayerVector::const_iterator i = layers.begin(); i != layers.end(); ++i )
{
std::vector<Layer>::iterator j = std::find( _layers.begin(), _layers.end(), i->get()->getUID() );
if ( j != _layers.end() )
reordered.push_back( *j );
}
_layers.swap( reordered );
}
}
unsigned layersDrawn = 0;
// access the GL extensions interface for the current GC:
const osg::Program::PerContextProgram* pcp = 0L;
#if OSG_MIN_VERSION_REQUIRED(3,3,3)
osg::ref_ptr<osg::GLExtensions> ext;
#else
osg::ref_ptr<osg::GL2Extensions> ext;
#endif
unsigned contextID;
if (_supportsGLSL)
{
contextID = state.getContextID();
#if OSG_MIN_VERSION_REQUIRED(3,3,3)
ext = osg::GLExtensions::Get(contextID, true);
#else
ext = osg::GL2Extensions::Get( contextID, true );
#endif
pcp = state.getLastAppliedProgramObject();
}
// cannot store these in the object since there could be multiple GCs (and multiple
// PerContextPrograms) at large
GLint tileKeyLocation = -1;
GLint birthTimeLocation = -1;
GLint opacityLocation = -1;
GLint uidLocation = -1;
GLint orderLocation = -1;
GLint texMatParentLocation = -1;
GLint minRangeLocation = -1;
GLint maxRangeLocation = -1;
// The PCP can change (especially in a VirtualProgram environment). So we do need to
// requery the uni locations each time unfortunately. TODO: explore optimizations.
if ( pcp )
{
tileKeyLocation = pcp->getUniformLocation( _tileKeyUniformNameID );
birthTimeLocation = pcp->getUniformLocation( _birthTimeUniformNameID );
opacityLocation = pcp->getUniformLocation( _opacityUniformNameID );
uidLocation = pcp->getUniformLocation( _uidUniformNameID );
orderLocation = pcp->getUniformLocation( _orderUniformNameID );
texMatParentLocation = pcp->getUniformLocation( _texMatParentUniformNameID );
minRangeLocation = pcp->getUniformLocation( _minRangeUniformNameID );
maxRangeLocation = pcp->getUniformLocation( _maxRangeUniformNameID );
}
// apply the tilekey uniform once.
if ( tileKeyLocation >= 0 )
{
ext->glUniform4fv( tileKeyLocation, 1, _tileKeyValue.ptr() );
}
// set the "birth time" - i.e. the time this tile last entered the scene in the current GC.
if ( birthTimeLocation >= 0 )
{
PerContextData& pcd = _pcd[contextID];
if ( pcd.birthTime < 0.0f )
{
const osg::FrameStamp* stamp = state.getFrameStamp();
if ( stamp )
{
pcd.birthTime = stamp->getReferenceTime();
}
}
ext->glUniform1f( birthTimeLocation, pcd.birthTime );
}
// activate the tile coordinate set - same for all layers
if ( renderColor )
{
state.setTexCoordPointer( _imageUnit+1, _tileCoords.get() );
}
#ifndef OSG_GLES2_AVAILABLE
if ( renderColor )
{
// emit a default terrain color since we're not binding a color array:
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
}
#endif
// activate the elevation texture if there is one. Same for all layers.
//if ( _elevTex.valid() )
//{
// state.setActiveTextureUnit( 2 );
// state.setTexCoordPointer( 1, _tileCoords.get() ); // necessary?? since we do it above
// _elevTex->apply( state );
// // todo: probably need an elev texture matrix as well. -gw
//}
// track the active image unit.
int activeImageUnit = -1;
// remember whether we applied a parent texture.
bool usedTexParent = false;
if ( _layers.size() > 0 )
{
float prev_opacity = -1.0f;
// first bind any shared layers. We still have to do this even if we are
// in !renderColor mode b/c these textures could be used by vertex shaders
// to alter the geometry.
int sharedLayers = 0;
if ( pcp )
{
for(unsigned i=0; i<_layers.size(); ++i)
{
const Layer& layer = _layers[i];
// a "shared" layer binds to a secondary texture unit so that other layers
// can see it and use it.
if ( layer._imageLayer->isShared() )
{
++sharedLayers;
int sharedUnit = layer._imageLayer->shareImageUnit().get();
{
state.setActiveTextureUnit( sharedUnit );
state.setTexCoordPointer( sharedUnit, layer._texCoords.get() );
// bind the texture for this layer to the active share unit.
layer._tex->apply( state );
// Shared layers need a texture matrix since the terrain engine doesn't
// provide a "current texture coordinate set" uniform (i.e. oe_layer_texc)
GLint texMatLocation = 0;
texMatLocation = pcp->getUniformLocation( layer._texMatUniformID );
if ( texMatLocation >= 0 )
{
ext->glUniformMatrix4fv( texMatLocation, 1, GL_FALSE, layer._texMat.ptr() );
}
}
}
}
}
if (renderColor)
{
// find the first opaque layer, top-down, and start there:
unsigned first = 0;
for(first = _layers.size()-1; first > 0; --first)
{
const Layer& layer = _layers[first];
if (layer._opaque &&
//Color filters can modify the opacity
layer._imageLayer->getColorFilters().empty() &&
layer._imageLayer->getVisible() &&
layer._imageLayer->getOpacity() >= 1.0f)
{
break;
}
}
// interate over all the image layers
for(unsigned i=first; i<_layers.size(); ++i)
{
const Layer& layer = _layers[i];
if ( layer._imageLayer->getVisible() && layer._imageLayer->getOpacity() > 0.0f )
{
// activate the visible unit if necessary:
if ( activeImageUnit != _imageUnit )
{
state.setActiveTextureUnit( _imageUnit );
activeImageUnit = _imageUnit;
}
// bind the texture for this layer:
layer._tex->apply( state );
// in FFP mode, we need to enable the GL mode for texturing:
if ( !pcp ) //!_supportsGLSL)
{
state.applyMode(GL_TEXTURE_2D, true);
}
// if we're using a parent texture for blending, activate that now
if ( texMatParentLocation >= 0 && layer._texParent.valid() )
{
state.setActiveTextureUnit( _imageUnitParent );
activeImageUnit = _imageUnitParent;
layer._texParent->apply( state );
usedTexParent = true;
}
// bind the texture coordinates for this layer.
// TODO: can probably optimize this by sharing or using texture matrixes.
// State::setTexCoordPointer does some redundant work under the hood.
state.setTexCoordPointer( _imageUnit, layer._texCoords.get() );
// apply uniform values:
if ( pcp )
{
// apply opacity:
if ( opacityLocation >= 0 )
{
float opacity = layer._imageLayer->getOpacity();
if ( opacity != prev_opacity )
{
ext->glUniform1f( opacityLocation, (GLfloat)opacity );
prev_opacity = opacity;
}
}
// assign the layer UID:
if ( uidLocation >= 0 )
{
ext->glUniform1i( uidLocation, (GLint)layer._layerID );
}
// assign the layer order:
if ( orderLocation >= 0 )
{
ext->glUniform1i( orderLocation, (GLint)layersDrawn );
}
// assign the parent texture matrix
if ( texMatParentLocation >= 0 && layer._texParent.valid() )
{
ext->glUniformMatrix4fv( texMatParentLocation, 1, GL_FALSE, layer._texMatParent.ptr() );
}
// assign the min range
if ( minRangeLocation >= 0 )
{
ext->glUniform1f( minRangeLocation, layer._imageLayer->getImageLayerOptions().minVisibleRange().get() );
}
// assign the max range
if ( maxRangeLocation >= 0 )
{
ext->glUniform1f( maxRangeLocation, layer._imageLayer->getImageLayerOptions().maxVisibleRange().get() );
}
}
// draw the primitive sets.
for(unsigned int primitiveSetNum=0; primitiveSetNum!=_primitives.size(); ++primitiveSetNum)
{
const osg::PrimitiveSet* primitiveset = _primitives[primitiveSetNum].get();
if ( primitiveset )
{
primitiveset->draw(state, usingVBOs);
}
else
{
OE_WARN << LC << "Strange, MPGeometry had a 0L primset" << std::endl;
}
}
++layersDrawn;
}
}
}
}
// if we didn't draw anything, draw the raw tiles anyway with no texture.
if ( layersDrawn == 0 )
{
if ( pcp )
{
if ( opacityLocation >= 0 )
ext->glUniform1f( opacityLocation, (GLfloat)1.0f );
if ( uidLocation >= 0 )
ext->glUniform1i( uidLocation, (GLint)-1 );
if ( orderLocation >= 0 )
ext->glUniform1i( orderLocation, (GLint)0 );
}
// draw the primitives themselves.
for(unsigned int primitiveSetNum=0; primitiveSetNum!=_primitives.size(); ++primitiveSetNum)
{
const osg::PrimitiveSet* primitiveset = _primitives[primitiveSetNum].get();
primitiveset->draw(state, usingVBOs);
}
}
else // at least one textured layer was drawn:
{
// prevent texture leakage
// TODO: find a way to remove this to speed things up
if ( renderColor )
{
glBindTexture( GL_TEXTURE_2D, 0 );
// if a parent texture was applied, need to disable both.
if ( usedTexParent )
{
state.setActiveTextureUnit(
activeImageUnit != _imageUnitParent ? _imageUnitParent :
_imageUnit );
glBindTexture( GL_TEXTURE_2D, 0);
}
}
}
}