Fix detection of Vulkan

When Qt is built to enable Vulkan support, it is given the path to
the Vulkan header source. This then enables the vulkan feature.

Qt3D used this feature to decide if it could use Vulkan directly or
not, however, since it is now built separately, it has no idea where
to find the headers, so QVulkanInstance is not properly defined.
This caused an issue when using official installers of Qt since
those are configured to support Vulkan.

So we now do a separate config check to find Vulkan for Qt3D.

When building Qt3D, you need to make sure if can find Vulkan (the same
way you configure Qt itself)

Task-number: QTBUG-90243
Change-Id: Ia05381597b4974d7b0914706ea2f607341dccacc
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
(cherry picked from commit 9a473a3c9b246f4895ae73d7060745b8b199a6c5)

7 files changed, 45 insertions, 24 deletions

diff --git a/src/extras/defaults/qt3dwindow.cpp b/src/extras/defaults/qt3dwindow.cpp
index 1b809c168..d1e72b54d 100644
--- a/src/extras/defaults/qt3dwindow.cpp
+++ b/src/extras/defaults/qt3dwindow.cpp
@@ -67,7 +67,7 @@
 
 #include <QEvent>
 
-#if QT_CONFIG(vulkan)
+#if QT_CONFIG(qt3d_vulkan)
 #include <QVulkanInstance>
 #endif
 
@@ -311,7 +311,7 @@ void setupWindowSurface(QWindow *window, Qt3DRender::API api) noexcept
         qputenv("QSG_RHI_BACKEND", "metal");
         window->setSurfaceType(QSurface::MetalSurface);
         break;
-#if QT_CONFIG(vulkan)
+#if QT_CONFIG(qt3d_vulkan)
     case Qt3DRender::API::Vulkan:
     {
         qputenv("QSG_RHI_BACKEND", "vulkan");
diff --git a/src/plugins/renderers/configure.cmake b/src/plugins/renderers/configure.cmake
index 49d8a8d04..5d2fbcde5 100644
--- a/src/plugins/renderers/configure.cmake
+++ b/src/plugins/renderers/configure.cmake
@@ -11,20 +11,3 @@
 
 
 #### Features
-
-qt_feature("qt3d_opengl_renderer" PRIVATE
-    SECTION "Qt 3D Renderers"
-    LABEL "OpenGL Renderer"
-    PURPOSE "Build the OpenGL renderer"
-)
-
-qt_feature("qt3d_rhi_renderer" PRIVATE
-    SECTION "Qt 3D Renderers"
-    LABEL "RHI Renderer"
-    PURPOSE "Build the RHI renderer"
-)
-
-qt_configure_add_summary_section(NAME "Qt3D Renderers")
-qt_configure_add_summary_entry(ARGS "qt3d_opengl_renderer")
-qt_configure_add_summary_entry(ARGS "qt3d_rhi_renderer")
-qt_configure_end_summary_section() # end of "Qt3D" section
diff --git a/src/plugins/renderers/rhi/graphicshelpers/submissioncontext.cpp b/src/plugins/renderers/rhi/graphicshelpers/submissioncontext.cpp
index cdaad436d..94884a27a 100644
--- a/src/plugins/renderers/rhi/graphicshelpers/submissioncontext.cpp
+++ b/src/plugins/renderers/rhi/graphicshelpers/submissioncontext.cpp
@@ -89,7 +89,7 @@
 #include <QtGui/private/qrhigles2_p.h>
 #endif
 
-#if QT_CONFIG(vulkan)
+#if QT_CONFIG(qt3d_vulkan)
 #include <QtGui/private/qrhivulkan_p.h>
 #endif
 #include <bitset>
@@ -578,7 +578,7 @@ void SubmissionContext::initialize()
 
     QRhi::Flags rhiFlags = QRhi::EnableDebugMarkers;
 
-#if QT_CONFIG(vulkan)
+#if QT_CONFIG(qt3d_vulkan)
     if (requestedApi == Qt3DRender::API::Vulkan) {
         QRhiVulkanInitParams params;
         params.inst = &Qt3DRender::staticVulkanInstance();
diff --git a/src/render/configure.cmake b/src/render/configure.cmake
new file mode 100644
index 000000000..18ee374da
--- /dev/null
+++ b/src/render/configure.cmake
@@ -0,0 +1,36 @@
+#### Inputs
+
+
+
+#### Libraries
+
+find_package(Vulkan)
+
+#### Tests
+
+
+
+#### Features
+
+qt_feature("qt3d-opengl-renderer" PRIVATE
+    SECTION "Qt 3D Renderers"
+    LABEL "OpenGL Renderer"
+    PURPOSE "Use the OpenGL renderer"
+)
+qt_feature("qt3d-rhi-renderer" PRIVATE
+    SECTION "Qt 3D Renderers"
+    LABEL "RHI Renderer"
+    PURPOSE "Use the RHI renderer"
+)
+qt_feature("qt3d-vulkan" PUBLIC
+    LABEL "Vulkan"
+    CONDITION Vulkan_FOUND AND QT_FEATURE_qt3d_rhi_renderer
+)
+
+qt_configure_add_summary_section(NAME "Qt 3D APIs")
+qt_configure_add_summary_entry(ARGS "qt3d-vulkan")
+qt_configure_end_summary_section() # end of "Qt 3D APIs" section
+qt_configure_add_summary_section(NAME "Qt 3D Renderers")
+qt_configure_add_summary_entry(ARGS "qt3d-opengl-renderer")
+qt_configure_add_summary_entry(ARGS "qt3d-rhi-renderer")
+qt_configure_end_summary_section() # end of "Qt 3D Renderers" section
diff --git a/src/render/surfaces/vulkaninstance.cpp b/src/render/surfaces/vulkaninstance.cpp
index a8de2fce8..24b1d55fa 100644
--- a/src/render/surfaces/vulkaninstance.cpp
+++ b/src/render/surfaces/vulkaninstance.cpp
@@ -39,7 +39,7 @@
 
 #include "vulkaninstance_p.h"
 
-#if QT_CONFIG(vulkan)
+#if QT_CONFIG(qt3d_vulkan)
 
 #include <QVulkanInstance>
 
diff --git a/src/render/surfaces/vulkaninstance_p.h b/src/render/surfaces/vulkaninstance_p.h
index 67f52af6a..5d6203cfd 100644
--- a/src/render/surfaces/vulkaninstance_p.h
+++ b/src/render/surfaces/vulkaninstance_p.h
@@ -52,11 +52,12 @@
 //
 
 #include <QtGui/qtguiglobal.h>
+#include <Qt3DRender/qt3drender-config.h>
 #include <Qt3DRender/private/qt3drender_global_p.h>
 
 QT_BEGIN_NAMESPACE
 
-#if QT_CONFIG(vulkan)
+#if QT_CONFIG(qt3d_vulkan)
 class QVulkanInstance;
 namespace Qt3DRender {
 Q_3DRENDERSHARED_PRIVATE_EXPORT
diff --git a/tests/manual/rhi/simple-rhi-cpp/main.cpp b/tests/manual/rhi/simple-rhi-cpp/main.cpp
index f839012f2..021b72ef6 100644
--- a/tests/manual/rhi/simple-rhi-cpp/main.cpp
+++ b/tests/manual/rhi/simple-rhi-cpp/main.cpp
@@ -95,6 +95,7 @@
 #include <Qt3DRender/QMaterial>
 #include <Qt3DRender/QTexture>
 #include <qmath.h>
+#include <Qt3DRender/qt3drender-config.h>
 
 static const constexpr auto vertex_shader = R"_(#version 450
 
@@ -247,7 +248,7 @@ int main(int argc, char* argv[])
         if (argv[1] == QByteArrayLiteral("--d3d11")) api = Qt3DRender::API::DirectX;
 #endif
 
-#if QT_CONFIG(vulkan)
+#if QT_CONFIG(qt3d_vulkan)
         if (argv[1] == QByteArrayLiteral("--vulkan")) api = Qt3DRender::API::Vulkan;
 #endif