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Force ANGLE GPU acceleration on Windows

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.. we know that opengl drivers for windows can be sketchy, so rather
   than not use opengl at all we insist on ANGLE at startup.

.. this is experimental and has been included as a single commit
   in the hope it will remain, but may be reverted if there are
   significant issues.
This commit is contained in:
Mark Liversedge
2021-08-20 13:32:03 +01:00
parent e1ed960714
commit f8cdbf3e39
2 changed files with 20 additions and 7 deletions
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6
src/Core/main.cpp
View File

@@ -414,6 +414,12 @@ main(int argc, char *argv[])
// what to do. We may add our own error handler later.
gsl_set_error_handler_off();
#ifdef Q_OS_WIN
// windows we use ANGLE for opengl on top of DirectX
// it avoids issues with bad graphics drivers
QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
#endif
// create the application -- only ever ONE regardless of restarts
application = new QApplication(argc, argv);
//XXXIdleEventFilter idleFilter;

21
src/Gui/ChartSpace.cpp
View File

@@ -1,4 +1,4 @@
/*
/*
* Copyright (c) 2020 Mark Liversedge (liversedge@gmail.com)
*
* This program is free software; you can redistribute it and/or modify it
@@ -50,14 +50,21 @@ ChartSpace::ChartSpace(Context *context, int scope, GcWindow *window) :
scene = new QGraphicsScene(this);
view = new QGraphicsView(this);
#ifdef Q_OS_LINUX
// hardware acceleration is important for this widget
#if defined(Q_OS_LINUX)
// if we have OpenGL and its 2.0 or higher, lets use it.
// this is pretty much any GPU since 2004 and keeps Qt happy.
// we only do this on Linux since Windows and MacOS have issues
// on Windows AMD Radeon drivers are dreadful and on MacOS
// OpenGL support is deprecated and users have reported rendering
// issues when this is enabled.
if (gl_major >= 2.0) view->setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers | QGL::DirectRendering)));
// we only do this on Linux
//if (gl_major >= 2.0) view->setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers | QGL::DirectRendering)));
if (gl_major >= 2.0) view->setViewport(new QGLWidget());
#endif
#if defined(Q_OS_WIN)
// on windows we always use OpenGL since we have forced
// ANGLE in main.cpp to implement opengl on top of directx
view->setViewport(new QGLWidget());
#endif
#if defined (Q_OS_MACOS)
// we have no options right now, it sucks
#endif
view->viewport()->setAttribute(Qt::WA_AcceptTouchEvents, false); // stops it stealing focus on mouseover