qt5base-lts/examples/opengl
Craig Scott d97fd7af2b Build examples in isolated sub-builds using ExternalProject
Examples are intended to show how to build against an installed Qt.
Building them as part of the main build means the way the Qt targets
are defined and created are not representative of an end user's build.
By building them as separate projects using ExternalProject, we can
more closely replicate the intended audience's environment. This
should allow us to catch more problems earlier.

Having examples built as part of the main build also creates problems
with some static builds where a tool built by the main build is needed
during configure time. This happens with other repos like qtdeclarative
but not (currently) with qtbase. Converting the examples in qtbase to
be built using ExternalProject is intended as a demonstrator for how
other repos can do similar. Until other repos are converted, they will
continue to work as they did before, with examples as part of the main
build for non-static builds only.

The new build-externally behavior is only supported for non-prefix
builds with this change. Prefix builds will continue to use the old
non-external method. Support for building examples externally in
prefix builds will be a separate change.

Task-number: QTBUG-90820
Fixes: QTBUG-91068
Change-Id: I2304329940568dbdb7da18d54d5595ea7d8668bc
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-05-26 13:33:29 +02:00
..
2dpainting CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
computegles31 CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
contextinfo CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
cube CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
doc Doc: Move example file that was left behind 2020-09-10 11:24:18 +02:00
hellogl2 CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
hellogles3 CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
hellowindow CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
openglwindow CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
paintedwindow CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
qopenglwidget CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
qopenglwindow CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
textures CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
threadedqopenglwidget CMake: Regenerate examples to set the WIN32_EXECUTABLE property 2020-10-27 12:49:39 +01:00
CMakeLists.txt Build examples in isolated sub-builds using ExternalProject 2021-05-26 13:33:29 +02:00
opengl.pro Remove legacy OpenGL examples 2020-02-21 09:01:08 +00:00
README Remove references to demos from docs. 2011-07-05 19:57:54 +02:00

Qt provides support for integration with OpenGL implementations on all
platforms, giving developers the opportunity to display hardware accelerated
3D graphics alongside a more conventional user interface.

These examples demonstrate the basic techniques used to take advantage of
OpenGL in Qt applications.


Documentation for these examples can be found via the Examples
link in the main Qt documentation.