605f9fad13
Qt 5.12.2 OBS-URL: https://build.opensuse.org/request/show/685624 OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/libqt5-qtbase?expand=0&rev=94
103 lines
4.4 KiB
Diff
103 lines
4.4 KiB
Diff
From e0bf494295398cbc3ba5a84380525f9c00e3f8ad Mon Sep 17 00:00:00 2001
|
|
From: Fabian Vogt <fabian@ritter-vogt.de>
|
|
Date: Thu, 14 Mar 2019 10:32:16 +0100
|
|
Subject: [PATCH 3/3] Revert "White-list more recent Mesa version for
|
|
multi-threading"
|
|
|
|
This reverts commit 97600d2c2885e667ced0926815b5a12a7f25285c.
|
|
---
|
|
.../xcb_glx/qglxintegration.cpp | 60 +++++++++++--------
|
|
1 file changed, 35 insertions(+), 25 deletions(-)
|
|
|
|
diff --git a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
|
|
index ddb8f45188..41012c0b04 100644
|
|
--- a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
|
|
+++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
|
|
@@ -48,7 +48,6 @@
|
|
#undef register
|
|
#include <GL/glx.h>
|
|
|
|
-#include <QtCore/QRegularExpression>
|
|
#include <QtGui/QOpenGLContext>
|
|
#include <QtGui/QOffscreenSurface>
|
|
|
|
@@ -650,6 +649,32 @@ static const char *qglx_threadedgl_blacklist_renderer[] = {
|
|
0
|
|
};
|
|
|
|
+// This disables threaded rendering on anything using mesa, e.g.
|
|
+// - nvidia/nouveau
|
|
+// - amd/gallium
|
|
+// - intel
|
|
+// - some software opengl implementations
|
|
+//
|
|
+// The client glx vendor string is used to identify those setups as that seems to show the least
|
|
+// variance between the bad configurations. It's always "Mesa Project and SGI". There are some
|
|
+// configurations which don't use mesa and which can do threaded rendering (amd and nvidia chips
|
|
+// with their own proprietary drivers).
|
|
+//
|
|
+// This, of course, is very broad and disables threaded rendering on a lot of devices which would
|
|
+// be able to use it. However, the bugs listed below don't follow any easily recognizable pattern
|
|
+// and we should rather be safe.
|
|
+//
|
|
+// http://cgit.freedesktop.org/xcb/libxcb/commit/?id=be0fe56c3bcad5124dcc6c47a2fad01acd16f71a will
|
|
+// fix some of the issues. Basically, the proprietary drivers seem to have a way of working around
|
|
+// a fundamental flaw with multithreaded access to xcb, but mesa doesn't. The blacklist should be
|
|
+// reevaluated once that patch is released in some version of xcb.
|
|
+static const char *qglx_threadedgl_blacklist_vendor[] = {
|
|
+ "Mesa Project and SGI", // QTCREATORBUG-10875 (crash in creator)
|
|
+ // QTBUG-34492 (flickering in fullscreen)
|
|
+ // QTBUG-38221
|
|
+ 0
|
|
+};
|
|
+
|
|
void QGLXContext::queryDummyContext()
|
|
{
|
|
if (m_queriedDummyContext)
|
|
@@ -709,33 +734,18 @@ void QGLXContext::queryDummyContext()
|
|
}
|
|
}
|
|
|
|
- if (glxvendor && m_supportsThreading) {
|
|
- // Blacklist Mesa drivers due to QTCREATORBUG-10875 (crash in creator),
|
|
- // QTBUG-34492 (flickering in fullscreen) and QTBUG-38221
|
|
- const char *mesaVersionStr = nullptr;
|
|
- if (strstr(glxvendor, "Mesa Project") != 0) {
|
|
- mesaVersionStr = (const char *) glGetString(GL_VERSION);
|
|
- m_supportsThreading = false;
|
|
- }
|
|
+ if (glxvendor) {
|
|
+ for (int i = 0; qglx_threadedgl_blacklist_vendor[i]; ++i) {
|
|
+ if (strstr(glxvendor, qglx_threadedgl_blacklist_vendor[i]) != 0) {
|
|
+ qCDebug(lcQpaGl).nospace() << "Multithreaded OpenGL disabled: "
|
|
+ "blacklisted vendor \""
|
|
+ << qglx_threadedgl_blacklist_vendor[i]
|
|
+ << "\"";
|
|
|
|
- if (mesaVersionStr) {
|
|
- // The issue was fixed in Xcb 1.11, but we can't check for that
|
|
- // at runtime, so instead assume it fixed with recent Mesa versions
|
|
- // released several years after the Xcb fix.
|
|
- QRegularExpression versionTest(QStringLiteral("Mesa (\\d+)"));
|
|
- QRegularExpressionMatch result = versionTest.match(QString::fromLatin1(mesaVersionStr));
|
|
- int versionNr = 0;
|
|
- if (result.hasMatch())
|
|
- versionNr = result.captured(1).toInt();
|
|
- if (versionNr >= 17) {
|
|
- // White-listed
|
|
- m_supportsThreading = true;
|
|
+ m_supportsThreading = false;
|
|
+ break;
|
|
}
|
|
}
|
|
- if (!m_supportsThreading) {
|
|
- qCDebug(lcQpaGl).nospace() << "Multithreaded OpenGL disabled: "
|
|
- "blacklisted vendor \"Mesa Project\"";
|
|
- }
|
|
}
|
|
|
|
context.doneCurrent();
|
|
--
|
|
2.20.1
|
|
|