diff options
| author | Marco Martin <mart@kde.org> | 2017-02-10 15:00:23 +0100 |
|---|---|---|
| committer | Laszlo Agocs <laszlo.agocs@qt.io> | 2017-04-05 10:04:54 +0000 |
| commit | 9ae028f507a22bd03c861e9d14c2efc4aa2efeda (patch) | |
| tree | 3a4346dfdf1d4aeaa6878b9b5f2bcae433a9f8b1 /src/gui/kernel/qopenglcontext.cpp | |
| parent | 6b52039866db6629747faa0aa1b57c206ed1cd6f (diff) | |
Environment variable enabling the workaround FBO readback bug
On some ARM devices the font glyph generation is broken
Add an environment variable to enable workaround_brokenFBOReadBack
in QOpenGLContext, to fix font rendering on such devices as
Mali and Adreno
Change-Id: I9cc99ecb8b71a35bc369ec9dd11b877016b1179e
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Diffstat (limited to 'src/gui/kernel/qopenglcontext.cpp')
| -rw-r--r-- | src/gui/kernel/qopenglcontext.cpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/gui/kernel/qopenglcontext.cpp b/src/gui/kernel/qopenglcontext.cpp index 8aea593bf0..3dc06ae60e 100644 --- a/src/gui/kernel/qopenglcontext.cpp +++ b/src/gui/kernel/qopenglcontext.cpp @@ -982,6 +982,40 @@ bool QOpenGLContext::makeCurrent(QSurface *surface) QOpenGLContext *previous = QOpenGLContextPrivate::setCurrentContext(this); if (d->platformGLContext->makeCurrent(surface->surfaceHandle())) { + static bool needsWorkaroundSet = false; + static bool needsWorkaround = false; + + if (!needsWorkaroundSet) { + QByteArray env; +#ifdef Q_OS_ANDROID + env = qgetenv(QByteArrayLiteral("QT_ANDROID_DISABLE_GLYPH_CACHE_WORKAROUND")); + needsWorkaround = env.isEmpty() || env == QByteArrayLiteral("0") || env == QByteArrayLiteral("false"); +#endif + env = qgetenv(QByteArrayLiteral("QT_ENABLE_GLYPH_CACHE_WORKAROUND")); + if (env == QByteArrayLiteral("1") || env == QByteArrayLiteral("true")) + needsWorkaround = true; + + if (!needsWorkaround) { + const char *rendererString = reinterpret_cast<const char *>(functions()->glGetString(GL_RENDERER)); + if (rendererString) + needsWorkaround = + qstrncmp(rendererString, "Mali-4xx", 6) == 0 // Mali-400, Mali-450 + || qstrncmp(rendererString, "Adreno (TM) 2xx", 13) == 0 // Adreno 200, 203, 205 + || qstrncmp(rendererString, "Adreno 2xx", 8) == 0 // Same as above but without the '(TM)' + || qstrncmp(rendererString, "Adreno (TM) 30x", 14) == 0 // Adreno 302, 305 + || qstrncmp(rendererString, "Adreno 30x", 9) == 0 // Same as above but without the '(TM)' + || qstrncmp(rendererString, "Adreno (TM) 4xx", 13) == 0 // Adreno 405, 418, 420, 430 + || qstrncmp(rendererString, "Adreno 4xx", 8) == 0 // Same as above but without the '(TM)' + || qstrcmp(rendererString, "GC800 core") == 0 + || qstrcmp(rendererString, "GC1000 core") == 0 + || qstrcmp(rendererString, "Immersion.16") == 0; + } + needsWorkaroundSet = true; + } + + if (needsWorkaround) + d->workaround_brokenFBOReadBack = true; + d->surface = surface; d->shareGroup->d_func()->deletePendingResources(this); |