Fix OpenGL possibly not working on Windows

zturtleman · zturtleman · commit 8c6c6ea29e2a · 2019-09-15T20:13:12.000-05:00
On Windows, Qt 5 prefers ANGLE or software renderer over some native
OpenGL drivers. However the statically linked immediate mode fixed
function OpenGL code in Maverick does not work in those cases. (Model
viewports and texture widgets are just black.) So tell Qt to always
use the native OpenGL driver.
diff --git a/src/implui/qtmain.cc b/src/implui/qtmain.cc
@@ -133,6 +133,10 @@ QApplication * ui_getapp()
 
 int ui_prep( int & argc, char * argv[] )
 {
+   // Don't use OpenGL ES (ANGLE, software) on Windows
+   // (It must be set before QApplication is created)
+   QCoreApplication::setAttribute( Qt::AA_UseDesktopOpenGL );
+
    s_app = new ModelApp( argc, argv );
 
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))

Original file line number	Diff line number	Diff line change
`@@ -133,6 +133,10 @@ QApplication * ui_getapp()`
`133`	`133`
`134`	`134`	`int ui_prep( int & argc, char * argv[] )`
`135`	`135`	`{`
	`136`	`+ // Don't use OpenGL ES (ANGLE, software) on Windows`
	`137`	`+ // (It must be set before QApplication is created)`
	`138`	`+ QCoreApplication::setAttribute( Qt::AA_UseDesktopOpenGL );`
	`139`	`+`
`136`	`140`	`s_app = new ModelApp( argc, argv );`
`137`	`141`
`138`	`142`	`#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))`