glGenBuffers(1, &pbo);
glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
- glBufferData(GL_PIXEL_PACK_BUFFER_ARB, global_flags.width * global_flags.height * 4, NULL, GL_STREAM_READ);
+ glBufferData(GL_PIXEL_PACK_BUFFER_ARB, global_flags.width * global_flags.height * 4, nullptr, GL_STREAM_READ);
ui->histogram->xAxis->setVisible(true);
ui->histogram->yAxis->setVisible(false);