johncbowman
commented
10 months ago Check asy --version. You need to install the missing OpenGL libraries and reconfigure.
Closed hshackle closed 10 months ago
johncbowman
commented
10 months ago Check asy --version. You need to install the missing OpenGL libraries and reconfigure.
hshackle
commented
10 months ago Sorry, I'm not sure if I follow - running asy --version gives:
Asymptote version 2.86git [(C) 2004 Andy Hammerlindl, John C. Bowman, Tom Prince]
ENABLED OPTIONS:
V3D 3D vector graphics output
WebGL 3D HTML rendering
OpenGL 3D OSMesa offscreen rendering
SSBO GLSL shader storage buffer objects
GSL GNU Scientific Library (special functions)
FFTW3 Fast Fourier transforms
XDR External Data Representation (portable binary file format for V3D)
CURL URL support
LSP Language Server Protocol
Readline Interactive history and editing
Sigsegv Distinguish stack overflows from segmentation faults
GC Boehm garbage collector
threads Render OpenGL in separate thread
DISABLED OPTIONS:
Eigen Eigenvalue libraryI would have expected OpenGL to be listed under "disabled options" if I was missing libraries. For what it's worth, I ran glxgears and glmark2 and both appear to run fine (I do not know whether these are relevant diagnostics - I just saw them appear in discussion before). I have freeglut 3.4.0-1 installed from the Arch repo.
user202729
commented
6 months ago Looks like same issue as #361 .
For me, it works if the version is
$ asy --version
Asymptote version 2.87-25 [(C) 2004 Andy Hammerlindl, John C. Bowman, Tom Prince]
ENABLED OPTIONS:
V3D 3D vector graphics output
WebGL 3D HTML rendering
OpenGL 3D OpenGL renderingOn Arch Linux, for some reason the asymptote package uses offscreen rendering by default. As a workaround, asymptote-git can be used.
johncbowman
commented
6 months ago If asy --version shows
OpenGL 3D OSMesa offscreen rendering
it must have been configured with --enable-offscreen, which is only intended for headless servers with no GPU card (like http://asymptote.ualberta.ca/).
user202729
commented
6 months ago Yes, but the no-offscreen rendering has a quirk that a window pops up every time I compile asymptote.
(edit: -iconify and -glOptions exist.)
Which library would I need to install to get off-screen rendering to work? (I assume OSMesa? but I already have it installed:
$ ls /usr/lib/libOSMesa* -1
/usr/lib/libOSMesa.so
/usr/lib/libOSMesa.so.8
/usr/lib/libOSMesa.so.8.0.0as mentioned above I was just using the standard asymptote package on Arch Linux)
glmark2 seems to work fine off-screen as well:
$ glmark2 --off-screen
=======================================================
glmark2 2023.01
=======================================================
OpenGL Information
GL_VENDOR: Intel
GL_RENDERER: Mesa Intel(R) HD Graphics 5500 (BDW GT2)
GL_VERSION: 4.6 (Compatibility Profile) Mesa 23.2.1-arch1.2
Surface Config: buf=32 r=8 g=8 b=8 a=8 depth=24 stencil=0 samples=0
Surface Size: 800x600 windowed
=======================================================
[build] use-vbo=false: FPS: 2552 FrameTime: 0.392 ms
[build] use-vbo=true: FPS: 3834 FrameTime: 0.261 ms
[texture] texture-filter=nearest: FPS: 2766 FrameTime: 0.362 ms
[texture] texture-filter=linear: FPS: 2575 FrameTime: 0.388 msEdit: For now, https://tex.stackexchange.com/questions/261101/how-do-i-run-asymptote-in-batch-mode-without-creating-windows gives a workaround -- create a virtual buffer X server.
user202729
commented
6 months ago With some debugging work, I have reduced the problem to:
#include <iostream>
#include <cstdlib>
#include <GL/osmesa.h>
using namespace std;
int screenWidth = 800;
int screenHeight = 600;
unsigned char* osmesa_buffer;
OSMesaContext ctx;
int main() {
cout << "Allocating osmesa_buffer of size " << screenWidth << "x"
<< screenHeight << "x4x" << sizeof(GLubyte) << endl;
osmesa_buffer = new unsigned char[screenWidth * screenHeight * 4 * sizeof(GLubyte)];
if (!osmesa_buffer) {
cerr << "Cannot allocate image buffer." << endl;
exit(-1);
}
const int attribs[] = {
OSMESA_FORMAT, OSMESA_RGBA,
OSMESA_DEPTH_BITS, 16,
OSMESA_STENCIL_BITS, 0,
OSMESA_ACCUM_BITS, 0,
OSMESA_PROFILE, OSMESA_CORE_PROFILE,
//OSMESA_PROFILE, OSMESA_COMPAT_PROFILE,
OSMESA_CONTEXT_MAJOR_VERSION, 4,
OSMESA_CONTEXT_MINOR_VERSION, 3,
0, 0
};
ctx = OSMesaCreateContextAttribs(attribs, NULL);
//ctx = OSMesaCreateContextExt(OSMESA_RGBA, 16, 0, 0, NULL);
if (!ctx) exit(-1);
if (!OSMesaMakeCurrent(ctx, osmesa_buffer, GL_UNSIGNED_BYTE, screenWidth, screenHeight)) {
cerr << "OSMesaMakeCurrent failed." << endl;
exit(-1);
}
int z = 0, s = 0, a = 0;
glGetIntegerv(GL_DEPTH_BITS, &z);
glGetIntegerv(GL_STENCIL_BITS, &s);
glGetIntegerv(GL_ACCUM_RED_BITS, &a);
cout << "Offscreen context settings: Depth=" << z << " Stencil=" << s
<< " Accum=" << a << endl;
if (z <= 0) {
cerr << "Error initializing offscreen context: Depth=" << z << endl;
exit(-1);
}
OSMesaDestroyContext(ctx);
delete[] osmesa_buffer;
return 0;
}Running the code above will output
Allocating osmesa_buffer of size 800x600x4x1
Offscreen context settings: Depth=0 Stencil=0 Accum=0
Error initializing offscreen context: Depth=0on my machine.
I observe that:
If the line OSMESA_PROFILE, OSMESA_CORE_PROFILE, is commented and the line //OSMESA_PROFILE, OSMESA_COMPAT_PROFILE, is uncommented, then it will works well.
If OSMesaCreateContextExt is used instead, then it will also work well.
Any idea what is going on? I'm not very familiar with OpenGL, so I'm not sure what's the difference between the core and compatibility profile (but note that the default profile is the compatibility profile)
In any case, whether or not you can reproduce the issue, I think we can just try to create the context the first way, then if depth = 0 then delete the context and recreate it the second way. There should be no harm?
(side note: problem is currently the official Arch Linux build of the package uses offscreen rendering. I think there is no disadvantage to using offscreen rendering?)
Might be relevant: my osmesa.h file contains
/*
* Create an Off-Screen Mesa rendering context with attribute list.
* The list is composed of (attribute, value) pairs and terminated with
* attribute==0. Supported Attributes:
*
* Attributes Values
* --------------------------------------------------------------------------
* OSMESA_FORMAT OSMESA_RGBA*, OSMESA_BGRA, OSMESA_ARGB, etc.
* OSMESA_DEPTH_BITS 0*, 16, 24, 32
* OSMESA_STENCIL_BITS 0*, 8
* OSMESA_ACCUM_BITS 0*, 16
* OSMESA_PROFILE OSMESA_COMPAT_PROFILE*, OSMESA_CORE_PROFILE
* OSMESA_CONTEXT_MAJOR_VERSION 1*, 2, 3
* OSMESA_CONTEXT_MINOR_VERSION 0+
*
* Note: * = default value
*
* We return a context version >= what's specified by OSMESA_CONTEXT_MAJOR/
* MINOR_VERSION for the given profile. For example, if you request a GL 1.4
* compat profile, you might get a GL 3.0 compat profile.
* Otherwise, null is returned if the version/profile is not supported.
*
* New in Mesa 11.2
*/it only has version up to 3? No version 4?
johncbowman
commented
6 months ago There shouldn't be any problem using OSMESA_COMPAT_PROFILE so I have made that change. But offscreen mode is only meant for a headless server lacking a GPU card or monitor. It isn't meant for normal interactive use:
In offscreen mode you will not have any interactive capability to adjust the camera position or zoom in on the scene (using the -V option). That means that you will only see 2D projections of your scene rather than true 3D vector graphics output. So if you want 3D vector graphics you must configure with --disable-offscreen. If Arch Linux is accidentally distributing a headless version of Asymptote that is a mistake that should be reported.
Incidentally, the brief OpenGL window that you see with --disable-offscreen (the default configuration option) is a normal feature of OpenGL. Either ignore it or specify the -iconify option on the command line to hide the rendering window used to project 3D graphics to 2D when the -noV option is specified (the default under UNIX).
Fortunately, all of these concerns will disappear when we migrate from OpenGL to Vulkan (hopefully in the 2.88 release). There won't be any phantom windows opening and, if absolutely needed, you will be able to control offscreen mode from the command line.
user202729
commented
6 months ago There shouldn't be any problem using OSMESA_COMPAT_PROFILE so I have made that change.
Interesting. Still, we don't know why the bug happens with core profile though.
Incidentally, the brief OpenGL window that you see with --disable-offscreen (the default configuration option) is a normal feature of OpenGL. Either ignore it or specify the -iconify option on the command line to hide the rendering window used to project 3D graphics to 2D when the -noV option is specified (the default under UNIX).
(The actual reason I complain about the brief window is https://github.com/vectorgraphics/asymptote/issues/423 . Normal user won't find it a trouble because the glutHideWindow(); is already there.)
In offscreen mode you will not have any interactive capability to adjust the camera position or zoom in on the scene (using the -V option).
Good point. I guess this can be raised to the Arch Linux package maintainer...
vEnhance
commented
5 months ago Good point. I guess this can be raised to the Arch Linux package maintainer...
The account registration on the Arch bug tracker is currently disabled, so I've gone and filed the issue for you:
https://gitlab.archlinux.org/archlinux/packaging/packages/asymptote/-/issues/1
I'm running into problems with Aymptote if I try to run it with
settings.renderset to anything other than 0. I am running Asymptote 2.86-2 on Arch Linux, downloaded from the Arch repository. I took the following minimal example from the Asymptote tutorial:and running
asy -vv test.asygives the following output:There is no issue if I use
settings.render = 0, but this leads to a very low-quality image.