"fbo not supported" on Intel HD 4000
dalboris opened this issue · comments
A user reported that he managed to compile VPaint, but that he has the following error message at runtime, both on Linux and Windows:
fbo not supported
He is using a HP Elitebook 8470p laptop, with an Intel Core i5 3320m, with Intel HD 4000. This is quite an old chipset (released in 2012), but according to Intel it should support OpenGL 4.0, and VPaint only requires OpenGL 3.2.
There are a bunch of similar issues on the Internet, but mostly with Intel HD 3000, not Intel HD 4000. For example:
LWJGL/lwjgl#119
processing/processing#4586
It isn't clear yet whether our specific problem is actually a bug of VPaint (using a FBO with some configuration not officially supported by OpenGL 3.2), or a bug in the OpenGL driver of the HD 4000, claiming that it supports 100% OpenGL 3.2 while actually it doesn't. The above links definitly show that it was a driver problem for the HD 3000. It may or may not be the same for the HD 4000. Either way, it's probably going to be complicated to solve, unfortunately. But I'll see what I can do, especially if this would also affect VGC.
Relevant: https://community.khronos.org/t/problem-using-framebuffer-for-picking/72670/6
It seems quite likely that the problem is with using FBOs with unsigned integers (instead of floats) for picking, which the HD 4000 doesn't seem to support properly. Disabling blending, or reducing the number of bits of the framebuffer (32bits to 16bits) might help.
Note that the message "fbo not supported" is actually VPaint code in View::newPicking():
void View::newPicking()
{
// code adapted from http://www.songho.ca/opengl/gl_fbo.html
// create a texture object
glGenTextures(1, &textureId_);
glBindTexture(GL_TEXTURE_2D, textureId_);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE); // automatic mipmap
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, WINDOW_SIZE_X_, WINDOW_SIZE_Y_, 0,
GL_RGBA, GL_UNSIGNED_BYTE, 0);
glBindTexture(GL_TEXTURE_2D, 0);
// test availability of OpenGL version
if(GLEW_VERSION_2_0)
{
//qDebug("supported");
}
else
{
qDebug("not supported");
}
if(glewIsSupported("GL_ARB_framebuffer_object"))
{
//qDebug("fbo supported");
}
else
{
qDebug("fbo not supported");
}
// create a renderbuffer object to store depth info
glGenRenderbuffers(1, &rboId_);
glBindRenderbuffer(GL_RENDERBUFFER, rboId_);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT,
WINDOW_SIZE_X_, WINDOW_SIZE_Y_);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
// create a framebuffer object
glGenFramebuffers(1, &fboId_);
glBindFramebuffer(GL_FRAMEBUFFER, fboId_);
// attach the texture to FBO color attachment point
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, textureId_, 0);
// attach the renderbuffer to depth attachment point
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, rboId_);
// check FBO status
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(status != GL_FRAMEBUFFER_COMPLETE)
{
qDebug() << "ERROR void View::newPicking()"
<< "FBO status != GL_FRAMEBUFFER_COMPLETE";
return;
}
// switch back to window-system-provided framebuffer
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// allocate memory for picking
pickingImg_ = new uchar[4 * WINDOW_SIZE_X_ * WINDOW_SIZE_Y_];
}
New development: I just installed Kubuntu 16.04 updates on my on my main Linux laptop, launched VPaint, and I got this error too! Then I realized that this laptop (Asus Zenbook UX31A bought in Feb 2014) is actually using an Intel HD 4000. Since VPaint used to work on this laptop (I made all my Siggraph presentations with it), both on Kubuntu 16.04 and Windows 7, this is not a hardware limitation. And actually, even the same VPaint binary on the same operating system used to work.
The version that first showed me this error was the latest commit from VPaint master branch (2c80ed5), compiled locally on Kubuntu 16.04 on Dec 25, 2018 against Qt 5.10.0.
So far, I also tried a locally built version of VPaint 1.6 against Qt 5.6.0, and the error doesn't occur.
So this can be caused by either OS/driver updates, changes in Qt, or changes in VPaint, or any combinations of those. I'll definitely investigate since I need the latest version of VPaint to run on this laptop!
Alright, this is in fact a regression introduced by 0e80508, where I changed from using the old, deprectated QGLWidget, to the newer, better QOpenGLWidget.
More precisely, on an Asus Zenbook UX31A (with Intel HD 4000), up-to-date Kubuntu 16.04, Qt 5.12.5, we have the following:
-
Compiling 6b3f9c5 produces no GL-related warning, and the program runs fine without warnings.
-
Compiling the following commit 0e80508, which ports from QGLWidget to QOpenglWidget, the application crashes with "fbo not supported", and compiling gives the following warning:
In file included from ../../../../Qt/5.12.5/gcc_64/include/QtGui/QOpenGLContext:1:0,
from ../../src/Gui/Background/BackgroundRenderer.cpp:13:
../../../../Qt/5.12.5/gcc_64/include/QtGui/qopenglcontext.h:55:2: warning: #warning qopenglfunctions.h is not compatible with GLEW, GLEW defines will be undefined [-Wcpp]
#warning qopenglfunctions.h is not compatible with GLEW, GLEW defines will be undefined
^
../../../../Qt/5.12.5/gcc_64/include/QtGui/qopenglcontext.h:56:2: warning: #warning To use GLEW with Qt, do not include <qopengl.h> or <QOpenGLFunctions> after glew.h [-Wcpp]
#warning To use GLEW with Qt, do not include <qopengl.h> or <QOpenGLFunctions> after glew.h
^
If I remove the following code in View.cpp:
if(glewIsSupported("GL_ARB_framebuffer_object"))
{
//qDebug("fbo supported");
}
else
{
qDebug("fbo not supported");
}
Then the app crashes on the following line:
glGenRenderbuffers(1, &rboId_);
So this really looks like an issue with using GLEW and QOpenGLWidget together in an improper way, and I hope it is fixable (we should use the QtOpenGLFunctions instead of the GLEW direct functions calls).
Why it somehow worked before I updated my Kubuntu is still a mystery, though.
Note: I was wondering whether we needed GLEW at all (now that we use QOpenGLWidget), but the answer is yes, because we use GLU for tessellation purposes, and Qt does not provide GLU functions.
After more testing, here are some partial thoughts and results.
Using QOpenGLWidget with GLEW really is problematic. If we include GLEW before QOpenGLFunctions, then there is a warning and the latter undefines most (all?) OpenGL 3.0+ functionality defined by GLEW. For example, glewIsSupported("GL_ARB_framebuffer_object") returns false, and glGenRenderbuffers is a nullptr crashing on invocation. At least on the laptop with the Intel HD 4000 chipset (despite the chipset supporting this functionality).
If we do the opposite and include GLEW after QOpenGLFunctions, then it doesn't compile, as GLEW complains that gl.h has already been included.
Therefore, what I tried was to remove GLEW altogether, and manually include GLU in the C++ files that require it for tesselation, which are KeyFace.cpp and InbetweenFace.cpp:
#if defined(__APPLE__) && defined(__MACH__)
# include <OpenGL/glu.h>
#else
# include <GL/glu.h>
#endif
Doing so, OpenGL 3.0+ functions are not globally accessible anymore. We can access them in relevant C++ files by doing these types of things:
auto* f = context()->versionFunctions<OpenGLFunctions_[...]>();
f->glGenRenderbuffers(1, &rboId_);
Also, doing so, it seems that OpenGL 2.1 functions are still globally accessible, at least they compile.
However, there are still a few issues:
-
Ideally, we'd like to get an OpenGL 3.2 Compatibility Profile context. However, when requesting such profile on the laptop with Intel HD 4000, we get an OpenGL 4.2 Core Profile context instead. Therefore, if we try to get 3.2 functionality via
context()->versionFunctions<OpenGLFunctions_3_2_Compatibility>(), we get a nullptr (so invoking its OpenGL functions obviously crash the application). -
With an OpenGL 4.2 Core Profile context, directly calling OpenGL 2.0 global functions (e.g.
glVertex2d()) seems to do nothing. I managed to get the app running and not crashing without GLEW, and with such profile, but nothing was drawn except the grey background. -
macOS seems not to support the OpenGL 3.2 Compatibility Profile anyway.
The next step is then to try by requesting an OpenGL 3.0 context, even though I believe VPaint requires some OpenGL 3.2 functionality (integer pixel formats? non-rectangle buffers? To be investigated). Note that if we request an OpenGL 3.0 context without calling QSurfaceFormat::setOption(QSurfaceFormat::DeprecatedFunctions), Qt still gives an OpenGL 4.2 Core Profile... which is weird. Adding the option seems to correctly provide an OpenGL 3.0 context.
For information, when we run the following on the Intel HD 4000 laptop, Kubuntu 16.04, Qt 5.12.5:
int main(int argc, char *argv[])
{
Application app(argc, argv);
std::vector<std::pair<int, int>> glVersions = {
{1, 0},
{1, 1},
{1, 2},
{1, 3},
{1, 4},
{1, 5},
{2, 0},
{2, 1},
{3, 0},
{3, 1},
{3, 2},
{3, 3},
{4, 0},
{4, 1},
{4, 2},
{4, 3},
{4, 4},
{4, 5}
};
for (auto version : glVersions) {
QSurfaceFormat format;
format.setVersion(version.first, version.second);
format.setOption(QSurfaceFormat::DeprecatedFunctions);
format.setDepthBufferSize(24);
format.setRedBufferSize(8);
format.setGreenBufferSize(8);
format.setBlueBufferSize(8);
format.setAlphaBufferSize(0);
format.setStencilBufferSize(8);
format.setSamples(1);
format.setSwapBehavior(QSurfaceFormat::DefaultSwapBehavior);
format.setSwapInterval(0);
format.setColorSpace(QSurfaceFormat::DefaultColorSpace);
format.setProfile(QSurfaceFormat::CompatibilityProfile);
QOpenGLContext* c = new QOpenGLContext();
c->setFormat(format);
c->create();
qDebug() << "Requested format:" << format;
qDebug() << "";
qDebug() << "Obtained format:" << c->format();
qDebug() << "-------------------------------------------";
}
}
We get the following output:
Requested format: QSurfaceFormat(version 1.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.3, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.4, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.5, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.3, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.3, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.4, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.5, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile)
-------------------------------------------
And running glxinfo gives the following:
~$ glxinfo
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB,
GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info,
GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer,
GLX_OML_swap_method, GLX_SGIS_multisample, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_swap_control
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
GLX_ARB_context_flush_control, GLX_ARB_create_context,
GLX_ARB_create_context_profile, GLX_ARB_create_context_robustness,
GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB,
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_buffer_age,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB,
GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info,
GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer,
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control,
GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
GLX_SGIX_visual_select_group, GLX_SGI_make_current_read,
GLX_SGI_swap_control, GLX_SGI_video_sync
GLX version: 1.4
GLX extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample,
GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB,
GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info,
GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer,
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control,
GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
GLX_SGIX_visual_select_group, GLX_SGI_make_current_read,
GLX_SGI_swap_control, GLX_SGI_video_sync
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Intel Open Source Technology Center (0x8086)
Device: Mesa DRI Intel(R) Ivybridge Mobile (0x166)
Version: 18.0.5
Accelerated: yes
Video memory: 1536MB
Unified memory: yes
Preferred profile: core (0x1)
Max core profile version: 4.2
Max compat profile version: 3.0
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.0
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile
OpenGL core profile version string: 4.2 (Core Profile) Mesa 18.0.5
OpenGL core profile shading language version string: 4.20
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth,
GL_AMD_draw_buffers_blend, GL_AMD_seamless_cubemap_per_texture,
GL_AMD_shader_trinary_minmax, GL_AMD_vertex_shader_layer,
GL_AMD_vertex_shader_viewport_index, GL_ANGLE_texture_compression_dxt3,
GL_ANGLE_texture_compression_dxt5, GL_APPLE_object_purgeable,
GL_ARB_ES2_compatibility, GL_ARB_ES3_compatibility,
GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_blend_func_extended,
GL_ARB_buffer_storage, GL_ARB_clear_buffer_object, GL_ARB_clear_texture,
GL_ARB_clip_control, GL_ARB_compressed_texture_pixel_storage,
GL_ARB_compute_shader, GL_ARB_conditional_render_inverted,
GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_copy_image,
GL_ARB_cull_distance, GL_ARB_debug_output, GL_ARB_depth_buffer_float,
GL_ARB_depth_clamp, GL_ARB_derivative_control, GL_ARB_direct_state_access,
GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend,
GL_ARB_draw_elements_base_vertex, GL_ARB_draw_indirect,
GL_ARB_draw_instanced, GL_ARB_enhanced_layouts,
GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location,
GL_ARB_fragment_coord_conventions, GL_ARB_fragment_layer_viewport,
GL_ARB_fragment_shader, GL_ARB_framebuffer_no_attachments,
GL_ARB_framebuffer_object, GL_ARB_framebuffer_sRGB,
GL_ARB_get_program_binary, GL_ARB_get_texture_sub_image,
GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, GL_ARB_half_float_pixel,
GL_ARB_half_float_vertex, GL_ARB_indirect_parameters,
GL_ARB_instanced_arrays, GL_ARB_internalformat_query,
GL_ARB_internalformat_query2, GL_ARB_invalidate_subdata,
GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multi_bind,
GL_ARB_multi_draw_indirect, GL_ARB_occlusion_query2,
GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object,
GL_ARB_point_sprite, GL_ARB_polygon_offset_clamp,
GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
GL_ARB_robustness, GL_ARB_sample_shading, GL_ARB_sampler_objects,
GL_ARB_seamless_cube_map, GL_ARB_seamless_cubemap_per_texture,
GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counter_ops,
GL_ARB_shader_atomic_counters, GL_ARB_shader_bit_encoding,
GL_ARB_shader_clock, GL_ARB_shader_draw_parameters,
GL_ARB_shader_group_vote, GL_ARB_shader_image_load_store,
GL_ARB_shader_image_size, GL_ARB_shader_objects, GL_ARB_shader_precision,
GL_ARB_shader_storage_buffer_object, GL_ARB_shader_subroutine,
GL_ARB_shader_texture_image_samples, GL_ARB_shader_texture_lod,
GL_ARB_shader_viewport_layer_array, GL_ARB_shading_language_420pack,
GL_ARB_shading_language_packing, GL_ARB_sync, GL_ARB_tessellation_shader,
GL_ARB_texture_barrier, GL_ARB_texture_buffer_object,
GL_ARB_texture_buffer_object_rgb32, GL_ARB_texture_buffer_range,
GL_ARB_texture_compression_bptc, GL_ARB_texture_compression_rgtc,
GL_ARB_texture_cube_map_array, GL_ARB_texture_filter_anisotropic,
GL_ARB_texture_float, GL_ARB_texture_gather,
GL_ARB_texture_mirror_clamp_to_edge, GL_ARB_texture_multisample,
GL_ARB_texture_non_power_of_two, GL_ARB_texture_query_levels,
GL_ARB_texture_query_lod, GL_ARB_texture_rectangle, GL_ARB_texture_rg,
GL_ARB_texture_rgb10_a2ui, GL_ARB_texture_storage,
GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle,
GL_ARB_texture_view, GL_ARB_timer_query, GL_ARB_transform_feedback2,
GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced,
GL_ARB_transform_feedback_overflow_query, GL_ARB_uniform_buffer_object,
GL_ARB_vertex_array_bgra, GL_ARB_vertex_array_object,
GL_ARB_vertex_attrib_64bit, GL_ARB_vertex_attrib_binding,
GL_ARB_vertex_shader, GL_ARB_vertex_type_10f_11f_11f_rev,
GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_viewport_array,
GL_ATI_blend_equation_separate, GL_ATI_texture_float, GL_EXT_abgr,
GL_EXT_blend_equation_separate, GL_EXT_draw_buffers2,
GL_EXT_draw_instanced, GL_EXT_framebuffer_blit,
GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_multisample_blit_scaled,
GL_EXT_framebuffer_sRGB, GL_EXT_packed_depth_stencil, GL_EXT_packed_float,
GL_EXT_pixel_buffer_object, GL_EXT_polygon_offset_clamp,
GL_EXT_provoking_vertex, GL_EXT_shader_integer_mix,
GL_EXT_shader_samples_identical, GL_EXT_texture_array,
GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc,
GL_EXT_texture_compression_s3tc, GL_EXT_texture_filter_anisotropic,
GL_EXT_texture_integer, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_decode,
GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm,
GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback,
GL_EXT_vertex_array_bgra, GL_IBM_multimode_draw_arrays,
GL_INTEL_performance_query, GL_KHR_blend_equation_advanced,
GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error,
GL_KHR_robustness, GL_MESA_pack_invert, GL_MESA_shader_integer_functions,
GL_MESA_texture_signed_rgba, GL_NV_conditional_render, GL_NV_depth_clamp,
GL_NV_packed_depth_stencil, GL_NV_texture_barrier, GL_OES_EGL_image,
GL_S3_s3tc
OpenGL version string: 3.0 Mesa 18.0.5
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth,
GL_AMD_draw_buffers_blend, GL_AMD_seamless_cubemap_per_texture,
GL_AMD_shader_trinary_minmax, GL_ANGLE_texture_compression_dxt3,
GL_ANGLE_texture_compression_dxt5, GL_APPLE_object_purgeable,
GL_APPLE_packed_pixels, GL_ARB_ES2_compatibility,
GL_ARB_ES3_compatibility, GL_ARB_arrays_of_arrays,
GL_ARB_blend_func_extended, GL_ARB_buffer_storage,
GL_ARB_clear_buffer_object, GL_ARB_clear_texture, GL_ARB_clip_control,
GL_ARB_color_buffer_float, GL_ARB_compressed_texture_pixel_storage,
GL_ARB_compute_shader, GL_ARB_conditional_render_inverted,
GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_copy_image,
GL_ARB_cull_distance, GL_ARB_debug_output, GL_ARB_depth_buffer_float,
GL_ARB_depth_clamp, GL_ARB_depth_texture, GL_ARB_derivative_control,
GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend,
GL_ARB_draw_elements_base_vertex, GL_ARB_draw_instanced,
GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location,
GL_ARB_fragment_coord_conventions, GL_ARB_fragment_program,
GL_ARB_fragment_program_shadow, GL_ARB_fragment_shader,
GL_ARB_framebuffer_no_attachments, GL_ARB_framebuffer_object,
GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary,
GL_ARB_get_texture_sub_image, GL_ARB_half_float_pixel,
GL_ARB_half_float_vertex, GL_ARB_instanced_arrays,
GL_ARB_internalformat_query, GL_ARB_internalformat_query2,
GL_ARB_invalidate_subdata, GL_ARB_map_buffer_alignment,
GL_ARB_map_buffer_range, GL_ARB_multi_bind, GL_ARB_multisample,
GL_ARB_multitexture, GL_ARB_occlusion_query, GL_ARB_occlusion_query2,
GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object,
GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_polygon_offset_clamp,
GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
GL_ARB_robustness, GL_ARB_sample_shading, GL_ARB_sampler_objects,
GL_ARB_seamless_cube_map, GL_ARB_seamless_cubemap_per_texture,
GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counter_ops,
GL_ARB_shader_atomic_counters, GL_ARB_shader_bit_encoding,
GL_ARB_shader_clock, GL_ARB_shader_draw_parameters,
GL_ARB_shader_group_vote, GL_ARB_shader_image_load_store,
GL_ARB_shader_image_size, GL_ARB_shader_objects, GL_ARB_shader_precision,
GL_ARB_shader_storage_buffer_object, GL_ARB_shader_texture_image_samples,
GL_ARB_shader_texture_lod, GL_ARB_shading_language_100,
GL_ARB_shading_language_420pack, GL_ARB_shading_language_packing,
GL_ARB_shadow, GL_ARB_sync, GL_ARB_texture_barrier,
GL_ARB_texture_border_clamp, GL_ARB_texture_compression,
GL_ARB_texture_compression_bptc, GL_ARB_texture_compression_rgtc,
GL_ARB_texture_cube_map, GL_ARB_texture_cube_map_array,
GL_ARB_texture_env_add, GL_ARB_texture_env_combine,
GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3,
GL_ARB_texture_filter_anisotropic, GL_ARB_texture_float,
GL_ARB_texture_gather, GL_ARB_texture_mirror_clamp_to_edge,
GL_ARB_texture_mirrored_repeat, GL_ARB_texture_multisample,
GL_ARB_texture_non_power_of_two, GL_ARB_texture_query_levels,
GL_ARB_texture_query_lod, GL_ARB_texture_rectangle, GL_ARB_texture_rg,
GL_ARB_texture_rgb10_a2ui, GL_ARB_texture_storage,
GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle,
GL_ARB_texture_view, GL_ARB_timer_query, GL_ARB_transform_feedback2,
GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced,
GL_ARB_transform_feedback_overflow_query, GL_ARB_transpose_matrix,
GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra,
GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_binding,
GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader,
GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev,
GL_ARB_window_pos, GL_ATI_blend_equation_separate, GL_ATI_draw_buffers,
GL_ATI_separate_stencil, GL_ATI_texture_env_combine3,
GL_ATI_texture_float, GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color,
GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate,
GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array,
GL_EXT_copy_texture, GL_EXT_draw_buffers2, GL_EXT_draw_instanced,
GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_framebuffer_blit,
GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_multisample_blit_scaled,
GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB,
GL_EXT_gpu_program_parameters, GL_EXT_multi_draw_arrays,
GL_EXT_packed_depth_stencil, GL_EXT_packed_float, GL_EXT_packed_pixels,
GL_EXT_pixel_buffer_object, GL_EXT_point_parameters,
GL_EXT_polygon_offset, GL_EXT_polygon_offset_clamp,
GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color,
GL_EXT_separate_specular_color, GL_EXT_shader_integer_mix,
GL_EXT_shader_samples_identical, GL_EXT_shadow_funcs,
GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_subtexture,
GL_EXT_texture, GL_EXT_texture3D, GL_EXT_texture_array,
GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc,
GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map,
GL_EXT_texture_edge_clamp, GL_EXT_texture_env_add,
GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3,
GL_EXT_texture_filter_anisotropic, GL_EXT_texture_integer,
GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_texture_rectangle,
GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_decode,
GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm,
GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback,
GL_EXT_vertex_array, GL_EXT_vertex_array_bgra,
GL_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip,
GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate,
GL_INTEL_performance_query, GL_KHR_blend_equation_advanced,
GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error,
GL_KHR_robustness, GL_MESA_pack_invert, GL_MESA_shader_integer_functions,
GL_MESA_texture_signed_rgba, GL_MESA_window_pos, GL_NV_blend_square,
GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_light_max_exponent,
GL_NV_packed_depth_stencil, GL_NV_primitive_restart,
GL_NV_texgen_reflection, GL_NV_texture_barrier,
GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_OES_EGL_image,
GL_OES_read_format, GL_S3_s3tc, GL_SGIS_generate_mipmap,
GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp,
GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 18.0.5
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:
GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5,
GL_APPLE_texture_max_level, GL_EXT_blend_func_extended,
GL_EXT_blend_minmax, GL_EXT_clip_cull_distance, GL_EXT_color_buffer_float,
GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_discard_framebuffer,
GL_EXT_disjoint_timer_query, GL_EXT_draw_buffers,
GL_EXT_draw_buffers_indexed, GL_EXT_draw_elements_base_vertex,
GL_EXT_frag_depth, GL_EXT_map_buffer_range, GL_EXT_multi_draw_arrays,
GL_EXT_occlusion_query_boolean, GL_EXT_polygon_offset_clamp,
GL_EXT_read_format_bgra, GL_EXT_robustness,
GL_EXT_separate_shader_objects, GL_EXT_shader_integer_mix,
GL_EXT_texture_border_clamp, GL_EXT_texture_compression_dxt1,
GL_EXT_texture_filter_anisotropic, GL_EXT_texture_format_BGRA8888,
GL_EXT_texture_rg, GL_EXT_texture_sRGB_decode,
GL_EXT_texture_type_2_10_10_10_REV, GL_EXT_unpack_subimage,
GL_INTEL_performance_query, GL_KHR_blend_equation_advanced,
GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error,
GL_KHR_robustness, GL_MESA_shader_integer_functions, GL_NV_draw_buffers,
GL_NV_fbo_color_attachments, GL_NV_read_buffer, GL_NV_read_depth,
GL_NV_read_depth_stencil, GL_NV_read_stencil, GL_OES_EGL_image,
GL_OES_EGL_image_external, GL_OES_EGL_sync,
GL_OES_compressed_ETC1_RGB8_texture, GL_OES_depth24, GL_OES_depth_texture,
GL_OES_depth_texture_cube_map, GL_OES_draw_buffers_indexed,
GL_OES_draw_elements_base_vertex, GL_OES_element_index_uint,
GL_OES_fbo_render_mipmap, GL_OES_get_program_binary, GL_OES_mapbuffer,
GL_OES_packed_depth_stencil, GL_OES_required_internalformat,
GL_OES_rgb8_rgba8, GL_OES_sample_shading, GL_OES_sample_variables,
GL_OES_shader_multisample_interpolation, GL_OES_standard_derivatives,
GL_OES_stencil8, GL_OES_surfaceless_context, GL_OES_texture_3D,
GL_OES_texture_border_clamp, GL_OES_texture_float,
GL_OES_texture_float_linear, GL_OES_texture_half_float,
GL_OES_texture_half_float_linear, GL_OES_texture_npot,
GL_OES_vertex_array_object, GL_OES_vertex_half_float
60 GLX Visuals
visual x bf lv rg d st colorbuffer sr ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a F gb bf th cl r g b a ns b eat
----------------------------------------------------------------------------
0x020 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x021 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x0c3 24 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x0c4 24 tc 0 32 0 r . . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x0c5 24 tc 0 32 0 r . . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x0c6 24 tc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x0c7 24 tc 0 24 0 r . . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x0c8 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0c9 24 tc 0 24 0 r . . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0ca 24 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x0cb 24 tc 0 32 0 r . . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x0cc 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0cd 24 tc 0 32 0 r . . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0ce 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 16 16 16 16 0 0 Slow
0x0cf 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0d0 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 16 16 16 0 0 0 Slow
0x0d1 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0d2 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 16 16 16 16 0 0 Slow
0x0d3 24 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 4 1 None
0x0d4 24 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 8 1 None
0x0d5 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 4 1 None
0x0d6 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 8 1 None
0x0d7 24 tc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 4 1 None
0x0d8 24 tc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 8 1 None
0x0d9 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 4 1 None
0x0da 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 8 1 None
0x0db 24 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 4 1 None
0x0dc 24 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 8 1 None
0x0dd 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 4 1 None
0x0de 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 8 1 None
0x0df 24 dc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x0e0 24 dc 0 32 0 r . . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x0e1 24 dc 0 32 0 r . . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x0e2 24 dc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x0e3 24 dc 0 24 0 r . . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x0e4 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0e5 24 dc 0 24 0 r . . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0e6 24 dc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x0e7 24 dc 0 32 0 r . . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x0e8 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0e9 24 dc 0 32 0 r . . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0ea 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x0eb 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 16 16 16 16 0 0 Slow
0x0ec 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0ed 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 16 16 16 0 0 0 Slow
0x0ee 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0ef 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 16 16 16 16 0 0 Slow
0x0f0 24 dc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 4 1 None
0x0f1 24 dc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 8 1 None
0x0f2 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 4 1 None
0x0f3 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 8 1 None
0x0f4 24 dc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 4 1 None
0x0f5 24 dc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 8 1 None
0x0f6 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 4 1 None
0x0f7 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 8 1 None
0x0f8 24 dc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 4 1 None
0x0f9 24 dc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 8 1 None
0x0fa 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 4 1 None
0x0fb 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 8 1 None
0x06e 32 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
84 GLXFBConfigs:
visual x bf lv rg d st colorbuffer sr ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a F gb bf th cl r g b a ns b eat
----------------------------------------------------------------------------
0x06f 0 tc 0 16 0 r y . 5 6 5 0 . . 0 0 0 0 0 0 0 0 0 None
0x070 0 tc 0 16 0 r . . 5 6 5 0 . . 0 0 0 0 0 0 0 0 0 None
0x071 0 tc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 0 0 None
0x072 0 tc 0 16 0 r . . 5 6 5 0 . . 0 16 0 0 0 0 0 0 0 None
0x073 0 tc 0 16 0 r y . 5 6 5 0 . . 0 24 8 0 0 0 0 0 0 None
0x074 0 tc 0 16 0 r . . 5 6 5 0 . . 0 24 8 0 0 0 0 0 0 None
0x075 24 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x076 24 tc 0 32 0 r . . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x077 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x078 24 tc 0 32 0 r . . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x079 24 tc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x07a 24 tc 0 24 0 r . . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x07b 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x07c 24 tc 0 24 0 r . . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x07d 24 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x07e 24 tc 0 32 0 r . . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x07f 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x080 24 tc 0 32 0 r . . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x081 0 tc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 0 0 None
0x082 0 tc 0 16 0 r y . 5 6 5 0 . . 0 16 0 16 16 16 0 0 0 Slow
0x083 32 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x084 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 16 16 16 16 0 0 Slow
0x085 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x086 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 16 16 16 0 0 0 Slow
0x087 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x088 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 16 16 16 16 0 0 Slow
0x089 0 tc 0 16 0 r y . 5 6 5 0 . . 0 0 0 0 0 0 0 4 1 None
0x08a 0 tc 0 16 0 r y . 5 6 5 0 . . 0 0 0 0 0 0 0 8 1 None
0x08b 0 tc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 4 1 None
0x08c 0 tc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 8 1 None
0x08d 24 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 4 1 None
0x08e 24 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 8 1 None
0x08f 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 4 1 None
0x090 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 8 1 None
0x091 24 tc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 4 1 None
0x092 24 tc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 8 1 None
0x093 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 4 1 None
0x094 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 8 1 None
0x095 24 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 4 1 None
0x096 24 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 8 1 None
0x097 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 4 1 None
0x098 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 8 1 None
0x099 0 dc 0 16 0 r y . 5 6 5 0 . . 0 0 0 0 0 0 0 0 0 None
0x09a 0 dc 0 16 0 r . . 5 6 5 0 . . 0 0 0 0 0 0 0 0 0 None
0x09b 0 dc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 0 0 None
0x09c 0 dc 0 16 0 r . . 5 6 5 0 . . 0 16 0 0 0 0 0 0 0 None
0x09d 0 dc 0 16 0 r y . 5 6 5 0 . . 0 24 8 0 0 0 0 0 0 None
0x09e 0 dc 0 16 0 r . . 5 6 5 0 . . 0 24 8 0 0 0 0 0 0 None
0x09f 24 dc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x0a0 24 dc 0 32 0 r . . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None
0x0a1 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x0a2 24 dc 0 32 0 r . . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x0a3 24 dc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x0a4 24 dc 0 24 0 r . . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None
0x0a5 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0a6 24 dc 0 24 0 r . . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0a7 24 dc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x0a8 24 dc 0 32 0 r . . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None
0x0a9 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0aa 24 dc 0 32 0 r . . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0ab 0 dc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 0 0 None
0x0ac 0 dc 0 16 0 r y . 5 6 5 0 . . 0 16 0 16 16 16 0 0 0 Slow
0x0ad 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None
0x0ae 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 16 16 16 16 0 0 Slow
0x0af 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None
0x0b0 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 16 16 16 0 0 0 Slow
0x0b1 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None
0x0b2 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 16 16 16 16 0 0 Slow
0x0b3 0 dc 0 16 0 r y . 5 6 5 0 . . 0 0 0 0 0 0 0 4 1 None
0x0b4 0 dc 0 16 0 r y . 5 6 5 0 . . 0 0 0 0 0 0 0 8 1 None
0x0b5 0 dc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 4 1 None
0x0b6 0 dc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 8 1 None
0x0b7 24 dc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 4 1 None
0x0b8 24 dc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 8 1 None
0x0b9 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 4 1 None
0x0ba 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 8 1 None
0x0bb 24 dc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 4 1 None
0x0bc 24 dc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 8 1 None
0x0bd 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 4 1 None
0x0be 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 8 1 None
0x0bf 24 dc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 4 1 None
0x0c0 24 dc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 8 1 None
0x0c1 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 4 1 None
0x0c2 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 8 1 None
Alright, not including GLEW, and requesting an OpenGL 3.0 context (making sure to set the DeprecatedFunctions option) does work on Kubuntu 16.04 on the laptop with Intel HD 4000. I'll test later on other hardware and operating systems, but already made a commit.
Note that despite not including GLEW, I still keep it in the project and link to it. I don't believe this is necessary, but it'll make it easier to add it back if necessary. VPaint should be thrown away eventually, so I go for the minimal working bugfix.
Unfortunately VPaint now crashes on opening on a MacBook Pro (13-inch, 2017, Four Thunderbolt 3 Ports), Intel Iris Plus Graphics 650 1536 MB. This is really annoying, it's because macOS doesn't support at all OpenGL 3.0+ compatibility profiles, so even though I request a 3.0 compatibility profile with:
void GLUtils::init()
{
// Performance seems to be significantly impacted by format.setSamples().
// For now I keep setSamples(1). May change to 4 or 16 after investigation.
QCoreApplication::setAttribute(Qt::AA_UseDesktopOpenGL);
QSurfaceFormat format;
format.setVersion(VPAINT_OPENGL_VERSION_MAJOR, VPAINT_OPENGL_VERSION_MINOR);
format.setOption(QSurfaceFormat::DeprecatedFunctions);
format.setDepthBufferSize(24);
format.setRedBufferSize(8);
format.setGreenBufferSize(8);
format.setBlueBufferSize(8);
format.setAlphaBufferSize(0);
format.setStencilBufferSize(8);
format.setSamples(1);
format.setSwapBehavior(QSurfaceFormat::DefaultSwapBehavior);
format.setSwapInterval(0);
format.setColorSpace(QSurfaceFormat::DefaultColorSpace);
format.setProfile(QSurfaceFormat::CompatibilityProfile);
QSurfaceFormat::setDefaultFormat(format);
}
I get in fact a 2.1 context:
QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
and the following call returns a nullptr:
void GLWidget::initializeGL()
{
[...]
auto* f = context()->versionFunctions<OpenGLFunctions>();
[...]
}
It seems that it was somewhat working before when using GLEW, but it wasn't really clean anyway. Obviously, the proper fix would be to stop using deprecated OpenGL and request a 3.2 Core Profile, but this would take way too long to implement for prototype software meant to be thrown away soon. Another perhaps sensible solution would be to request a 2.x profile and then use extensions to access 3.x functions. I'm not sure how to do this with Qt 5.12, but I'll investigate. A potential uglier fix is to use back GLEW, doing ugly defines/undefines so that both GLEW and Qt can somehow collaborate.
Note: below is the output from the test program written a few messages above. We can see that macOS really insists on an OpenGL 2.1 context.
Requested format: QSurfaceFormat(version 1.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.3, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.4, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 1.5, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 3.3, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.2, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.3, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.4, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
Requested format: QSurfaceFormat(version 4.5, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile)
Obtained format: QSurfaceFormat(version 2.1, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 8, samples 2, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile)
-------------------------------------------
This should be fixed now. We are now only requesting an OpenGL 2.1 context, and querying explicitely for the GL_ARB_framebuffer_object, which are the only functionality besides OpenGL 2.1 which we need. This is cleaner and should work properly on all platforms, including macOS and older sytems.