Doc: Fix documentation warnings related to Clang QDoc parser

Since Qt 5.11, QDoc uses Clang to parse C++ documentation. Clang
requires a module header, as well as proper include paths, to
build a precompiled header and process the sources.

To do this, add a custom module header that pulls in all Qt 3D modules
- this way, we can continue using a single documentation project to
covers all of Qt 3D.

Fix all documentation warnings are caused by missing namespaces, QML
module/type names and typos, as well as a number of linking problems
and other minor issues.

After this change, the remaining documentation issues consist of
'No documentation for ...' warnings.

Task-number: QTBUG-67790
Change-Id: I38b91163c475a00cc1893e793240470c5409eb57
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/render/materialsystem/qgraphicsapifilter.cpp b/src/render/materialsystem/qgraphicsapifilter.cpp
index a94018360..65ad77d28 100644
--- a/src/render/materialsystem/qgraphicsapifilter.cpp
+++ b/src/render/materialsystem/qgraphicsapifilter.cpp
@@ -141,6 +141,8 @@ QGraphicsApiFilter::~QGraphicsApiFilter()
 
   \value OpenGLES QSurfaceFormat::OpenGLES
   \value OpenGL QSurfaceFormat::OpenGL
+  \value Vulkan Vulkan
+  \value DirectX DirectX
 
 */