Hi, On 06/06/2019 17:05, Pieter Barendrecht wrote:
I'm trying to figure out exactly what to include to be able to use the OpenGL command glDispatchComputeGroupSizeARB (which I'm positive is supported on my machine/system). Unfortunately, the typical extension workflow (i.e. #include <QtOpenGLExtensions> in the relevant header file and QT += openglextensions in the .pro file) does not seem to work — it still results in an 'use of undeclared identifier' error upon compiling the code. Any thoughts? I'm on Linux (64bit), using Qt 5.12.
I believe the QtOpenGLExtensions hasn't been regenerated for quite a while, and thus does not cover this extension (Khronos changed the extension database format or somesuch).
An easy workaround is to resolve the entry point manually. Include qopengl.h and do something like this:
if (ctx->hasExtension("GL_ARB_compute_variable_group_size")) {
entry =
reinterpret_cast<PFNGLDISPATCHCOMPUTEGROUPSIZEARBPROC>(ctx->getProcAddress("glDispatchComputeGroupSizeARB");
// use it
}
HTH, -- Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB (France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com KDAB - The Qt, C++ and OpenGL Experts
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