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Workaround for transparency problems on wayland.

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Reset alpha channel value to 1 at the end of 3d  rendering. The way Qt handles OpenGL widgets with transparent pixels in their final output is inconsistent.
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Karliss
2025-02-09 16:53:18 +02:00
committed by Chris Hennes
parent 1350dd6bd0
commit cb8c193408
1 changed files with 20 additions and 0 deletions
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20
src/Gui/View3DInventorViewer.cpp
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@@ -2457,6 +2457,26 @@ void View3DInventorViewer::renderScene()
if (naviCubeEnabled) {
naviCube->drawNaviCube();
}
// Workaround for inconsistent QT behavior related to handling custom OpenGL widgets that
// leave non opaque alpha values in final output.
// On wayland that can cause window to become transparent or blurry trail effect in the
// parts that contain partially transparent objects.
//
// At the end of rendering clear alpha value, so that it doesn't matter how rest of the
// compositing stack at QT and desktop level would interpret transparent pixels.
//
// Related issues:
// https://bugreports.qt.io/browse/QTBUG-110014
// https://bugreports.qt.io/browse/QTBUG-132197
// https://bugreports.qt.io/browse/QTBUG-119214
// https://github.com/FreeCAD/FreeCAD/issues/8341
// https://github.com/FreeCAD/FreeCAD/issues/6177
glPushAttrib(GL_COLOR_BUFFER_BIT);
glColorMask(false, false, false, true);
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
glPopAttrib();
}
void View3DInventorViewer::setSeekMode(bool on)