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PUI: change alpha composition mode.

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This fixes the missing model-view text, but needs some wider testing,
since it may mess up some other things.
This commit is contained in:
James Turner 2018-10-25 00:04:54 +01:00
parent 07cb303e8c
commit df9c368099
1 changed files with 6 additions and 1 deletions
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7
src/Viewer/PUICamera.cxx
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@ -113,6 +113,9 @@ public:
glPushAttrib(GL_ALL_ATTRIB_BITS);
glPushClientAttrib(~0u);
glEnable ( GL_BLEND ) ;
glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
// reset pixel storage stuff for PLIB FNT drawing via glBitmap
glPixelStorei(GL_PACK_ALIGNMENT, 4);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
@ -348,7 +351,9 @@ void PUICamera::init(osg::Group* parent)
stateSet->setRenderBinDetails(1001, "RenderBin");
stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::ON);
stateSet->setTextureAttribute(0, _fboTexture);
stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
// use GL_ONE becuase we pre-multiplied by alpha when building the FBO texture
stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::ONE, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);