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egl: Remove the disabling of surfaceless contexts for Mesa

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The current check is based on the state of things in 2015,
we will assume that this is no longer an issue with more
modern Mesa versions.

Change-Id: I60c4966eea817a6df1a1edf6064a978fbcd44cf7
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
This commit is contained in:
Laszlo Agocs 2022-04-26 06:59:37 -07:00
parent 8161726619
commit e8562b0e8d
1 changed files with 0 additions and 9 deletions
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9
src/gui/opengl/platform/egl/qeglpbuffer.cpp
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@ -65,15 +65,6 @@ QEGLPbuffer::QEGLPbuffer(EGLDisplay display, const QSurfaceFormat &format, QOffs
m_hasSurfaceless = !flags.testFlag(QEGLPlatformContext::NoSurfaceless)
&& q_hasEglExtension(display, "EGL_KHR_surfaceless_context");
// Disable surfaceless contexts on Mesa for now. As of 10.6.0 and Intel at least, some
// operations (glReadPixels) are unable to work without a surface since they at some
// point temporarily unbind the current FBO and then later blow up in some seemingly
// safe operations, like setting the viewport, that apparently need access to the
// read/draw surface in the Intel backend.
const char *vendor = eglQueryString(display, EGL_VENDOR); // hard to check for GL_ strings here, so blacklist all Mesa
if (vendor && strstr(vendor, "Mesa"))
m_hasSurfaceless = false;
if (m_hasSurfaceless)
return;