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Better fix for CanvasWidget transparency

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Use osg GLExtensions to retrieve glBlendFuncSeperate on Win32
This commit is contained in:
James Turner 2017-10-22 19:25:12 +01:00
parent 89ca665bfb
commit e090427591
1 changed files with 6 additions and 3 deletions
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9
src/GUI/CanvasWidget.cxx
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@ -26,6 +26,8 @@
#include <Main/fg_os.hxx> // fgGetKeyModifiers()
#include <Scripting/NasalSys.hxx>
#include <osg/GLExtensions>
#include <simgear/canvas/Canvas.hxx>
#include <simgear/canvas/events/MouseEvent.hxx>
@ -196,9 +198,10 @@ void CanvasWidget::setSize(int w, int h)
//------------------------------------------------------------------------------
void CanvasWidget::draw(int dx, int dy)
{
osg::GLExtensions* extensions = osg::GLExtensions::Get(0, true);
glEnable(GL_TEXTURE_2D);
// glEnable(GL_BLEND);
// glBlendFuncSeparate(GL_ONE, GL_ZERO, GL_ZERO, GL_ONE);
glEnable(GL_BLEND);
extensions->glBlendFuncSeparate(GL_ONE, GL_ZERO, GL_ZERO, GL_ONE);
glBindTexture(GL_TEXTURE_2D, _canvas_mgr->getCanvasTexId(_canvas));
glBegin( GL_QUADS );
@ -209,5 +212,5 @@ void CanvasWidget::draw(int dx, int dy)
glTexCoord2f(0,1); glVertex2f(dx + abox.min[0], dy + abox.max[1]);
glEnd();
glDisable(GL_TEXTURE_2D);
// glDisable(GL_BLEND);
glDisable(GL_BLEND);
}