Factor out more resources.

+ Use QOpenGLShader to get compiled shader code in TreeView.
+ Remove last remaining Qt resources dependency in libqtk.
+ shaders.h in libqtk to define default GLSL shader programs.

src/app/CMakeLists.txt

@@ -26,7 +26,17 @@ else()
   )
 endif()
 
+if(QTK_GUI_SCENE)
+  qt6_add_big_resources(QTK_GUI_SOURCES "${QTK_RESOURCES}/resources.qrc")
+else()
+  qt6_add_big_resources(
+      QTK_GUI_SOURCES
+      "${QTK_RESOURCES}/minimal_resources.qrc"
+  )
+endif()
+
 qt_add_executable(qtk_gui ${QTK_GUI_SOURCES})
+
 target_link_libraries(qtk_gui PRIVATE qtk_plugin_library)
 
 if (QTK_GUI_SCENE)

src/app/main.cpp

@@ -10,17 +10,9 @@
 
 #include "qtkmainwindow.h"
 
-#ifdef QTK_GUI_SCENE
-#include "qtkscene.h"
-using AppScene = QtkScene;
-#else
-using AppScene = EmptyScene;
-#endif
-
 int main(int argc, char * argv[])
 {
-  Q_INIT_RESOURCE(resources);
-
+  initResources();
   QApplication a(argc, argv);
 
   auto window = MainWindow::getMainWindow();

src/app/qtkmainwindow.h

@@ -16,6 +16,21 @@
 
 #include "designer-plugins/debugconsole.h"
 
+#ifdef QTK_GUI_SCENE
+#include "qtkscene.h"
+using AppScene = QtkScene;
+inline void initResources()
+{
+  Q_INIT_RESOURCE(resources);
+}
+#else
+using AppScene = EmptyScene;
+inline void initResources()
+{
+  Q_INIT_RESOURCE(minimal_resources);
+}
+#endif
+
 namespace Ui
 {
   class MainWindow;

src/app/qtkscene.cpp

@@ -42,8 +42,8 @@ void QtkScene::init()
   // Clone qtk-resources if it doesn't already exist.
   QDir repoDir("resources/");
   if (!repoDir.exists()) {
-    qDebug() << "Cloning qtk-resources repository to '"
-             << repoDir.absolutePath() << "'...";
+    qDebug() << "Cloning qtk-resources repository to " << repoDir.absolutePath()
+             << "...";
 
     // Run git clone
     QProcess gitProcess;