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Fix glew init issue when using on Wayland #14

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Fix glew init issue when using on Wayland #14

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c9ff080
Fix glew init issue when using on Wayland
bogado Oct 8, 2026
52fa7cb
Wayland GLEW fix: use __linux__ and WAYLAND_DISPLAY, keep X11 errors
pepc84 Oct 20, 2026
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11 changes: 9 additions & 2 deletions src/Processing.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3628,9 +3628,16 @@ void PApplet::run(){
});
glfwMakeContextCurrent(gWindow);
glewExperimental = GL_TRUE;
glewExperimental = GL_TRUE;
GLenum glewErr = glewInit();
if(glewErr != GLEW_OK){
bool glewOk = (glewErr == GLEW_OK);
#if defined(__linux__) && defined(GLEW_ERROR_NO_GLX_DISPLAY)
// A GLX-built GLEW reports NO_GLX_DISPLAY under native Wayland (GLFW uses EGL there),
// but the core GL functions are already loaded by then, so it's safe to carry on.
if (!glewOk && glewErr == GLEW_ERROR_NO_GLX_DISPLAY && getenv("WAYLAND_DISPLAY") != nullptr)
glewOk = true;
#endif
if(!glewOk){

#ifdef _WIN32
char msg[256]; snprintf(msg,sizeof(msg),"glewInit() failed: %s", glewGetErrorString(glewErr));
MessageBoxA(NULL, msg, "processing-cpp Error", MB_OK|MB_ICONERROR);
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