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Missing gpu warning #1328

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5536543
fix: add warning instead of seg fault on missing GPU
deltag0 Jul 3, 2026
5c86c5c
docs: document hard GPU requirement and new startup error in user manual
deltag0 Jul 3, 2026
0904adf
chore: gitignore .serena/ local tool config
deltag0 Jul 3, 2026
306b5c8
docs: revert gitignore and clean docs
deltag0 Jul 3, 2026
e2a9ea8
docs: clean docs
deltag0 Jul 3, 2026
787fc68
format
deltag0 Jul 3, 2026
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1 change: 1 addition & 0 deletions docs/rv-manuals/rv-user-manual/rv-user-manual-chapter-fourteen.md
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,7 @@ While high performance playback cannot be guaranteed, these minimum system requi
| Component | Recommended Minimum |
| --- | --- |
| CPU | 64-bit, 6 cores, 12 logical processors |
| GPU | OpenGL support |
| Memory (RAM) | 16 GB |
| Memory (GPU) | 8 GB |
| Storage | RAID or nvme |
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5 changes: 5 additions & 0 deletions src/bin/apps/rv/main.cpp
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Expand Up @@ -787,6 +787,11 @@ int utf8Main(int argc, char* argv[])
TwkGLF::FBOVideoDevice* dummyDev = new TwkGLF::FBOVideoDevice(0, 10, 10, false);
IPCore::ImageRenderer::queryGL();
const char* glVersion = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
if (!glVersion)
{
cout << "ERROR: no GPU available: GL_SHADING_LANGUAGE_VERSION query failed" << endl;
exit(-1);
}
IPCore::Shader::Function::useShadingLanguageVersion(glVersion);
#endif

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5 changes: 5 additions & 0 deletions src/bin/imgtools/rvio/main.cpp
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Expand Up @@ -985,6 +985,11 @@ int utf8Main(int argc, char* argv[])
#endif
IPCore::ImageRenderer::queryGL();
const char* glVersion = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
if (!glVersion)
{
cout << "ERROR: no GPU available: GL_SHADING_LANGUAGE_VERSION query failed" << endl;
exit(-1);
}
IPCore::Shader::Function::useShadingLanguageVersion(glVersion);

#ifndef PLATFORM_WINDOWS
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32 changes: 30 additions & 2 deletions src/lib/graphics/TwkGLFFBO/FBOVideoDevice.cpp
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Expand Up @@ -10,6 +10,7 @@
#include <TwkGLF/GL.h>
#include <TwkGLF/GLFBO.h>
#include <TwkExc/Exception.h>
#include <cstdlib>
#include <iostream>

#ifdef PLATFORM_LINUX
Expand Down Expand Up @@ -154,9 +155,22 @@ namespace TwkGLF
int attrs[] = {GLX_BUFFER_SIZE, 32, GLX_RGBA, 0, GLX_STENCIL_SIZE, 1};

m_imp->display = XOpenDisplay(0);
if (!m_imp->display)
{
cout << "ERROR: no GPU available: could not open X display" << endl;
exit(-1);
}

m_imp->root = DefaultRootWindow(m_imp->display);
m_imp->vis = glXChooseVisual(m_imp->display, DefaultScreen(m_imp->display), attrs);

if (!m_imp->vis)
{
cout << "ERROR: no GPU available: no matching GLX visual"
<< endl;
exit(-1);
}

swa.colormap = XCreateColormap(m_imp->display, m_imp->root, m_imp->vis->visual, AllocNone);

swa.event_mask = ExposureMask | KeyPressMask;
Expand All @@ -166,6 +180,12 @@ namespace TwkGLF

m_imp->ctx = glXCreateContext(m_imp->display, m_imp->vis, 0, True);

if (!m_imp->ctx)
{
cout << "ERROR: no GPU available: could not create GLX context" << endl;
exit(-1);
}

glXMakeCurrent(m_imp->display, m_imp->tiny, m_imp->ctx);
#endif

Expand Down Expand Up @@ -241,10 +261,18 @@ namespace TwkGLF
SetPixelFormat(m_imp->deviceContext, result, &m_imp->format);

m_imp->glContext = wglCreateContext(m_imp->deviceContext);
assert(m_imp->glContext != NULL);
if (!m_imp->glContext)
{
cout << "ERROR: no GPU available: could not create WGL context" << endl;
exit(-1);
}

wglMakeCurrent(m_imp->deviceContext, m_imp->glContext);
assert(wglGetCurrentContext() != NULL);
if (!wglGetCurrentContext())
{
cout << "ERROR: no GPU available: could not activate WGL context" << endl;
exit(-1);
}
glewInit(NULL);
#endif

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