[Bug 69689] FBO with GL_RGBA16F texture format silent drawing corruption

https://bugs.freedesktop.org/show_bug.cgi?id=69689

--- Comment #9 from Johannes Jordan freedesktop@lanrules.de --- I am sorry my testcase uses Qt, but it would be much more time consuming for me to learn/rewrite everything without Qt.

This is the qmake file: # cat fbotest.pro QT += core gui opengl greaterThan(QT_MAJOR_VERSION, 4): QT += widgets TARGET = fbotest TEMPLATE = app SOURCES += fbotest.cpp HEADERS += fbotest.h

Then run qmake, make, ./fbotest

The testcase draws a rectangle and some text into a FBO, then blits it onto another FBO due to multisampling, finally draws the texture on screen. This is common practice.

Thank you for taking your time to try the testcase!