Remove qt resource images from libqtk.

resources/minimal_resources.qrc

@@ -1,6 +1,5 @@
 <RCC>
     <qresource prefix="/textures">
-        <file alias="plaster.png">images/plaster.png</file>
         <file alias="crate.png">images/crate.png</file>
         <file alias="stone.png">images/stone.png</file>
         <file alias="wood.png">images/wood.png</file>

resources/resources.qrc

@@ -1,6 +1,5 @@
 <RCC>
     <qresource prefix="/textures">
-        <file alias="plaster.png">images/plaster.png</file>
         <file alias="crate.png">images/crate.png</file>
         <file alias="stone.png">images/stone.png</file>
         <file alias="wood.png">images/wood.png</file>

src/app/qtkmainwindow.cpp

@@ -62,7 +62,7 @@ MainWindow::MainWindow(QWidget * parent) : QMainWindow(parent)
   ui_->menuView->addAction(ui_->qtk__TreeView->toggleViewAction());
 
   // Set the window icon used for Qtk.
-  setWindowIcon(Qtk::getIcon());
+  setWindowIcon(getIcon());
 }
 
 MainWindow::~MainWindow()

src/app/qtkmainwindow.h

@@ -132,6 +132,11 @@ class MainWindow : public QMainWindow
      */
     void setScene(Qtk::Scene * scene);
 
+    /**
+     * @return Default icon to use for Qtk desktop application.
+     */
+    static QIcon getIcon() { return QIcon(":/icons/icon.png"); }
+
   public slots:
     /**
      * Trigger a refresh for widgets related to a scene that has been updated.

src/designer-plugins/widgetplugin.cpp

@@ -67,7 +67,7 @@ QString WidgetPlugin::whatsThis() const
 
 QIcon WidgetPlugin::icon() const
 {
-  return Qtk::getIcon();
+  return QIcon(":/icons/icon.png");
 }
 
 bool WidgetPlugin::isContainer() const

src/qtk/qtkapi.h

@@ -43,14 +43,6 @@ namespace Qtk
     }
     return widget;
   }
-
-  /**
-   * @return Default icon to use for Qtk desktop application.
-   */
-  static QIcon getIcon()
-  {
-    return QIcon(":/icons/icon.png");
-  }
 }  // namespace Qtk
 
 #endif  // QTK_QTKAPI_H

src/qtk/texture.cpp

@@ -8,6 +8,7 @@
 
 #include <QDebug>
 #include <QImageReader>
+#include <QPainter>
 
 #include "texture.h"
 
@@ -65,6 +66,22 @@ QOpenGLTexture * OpenGLTextureFactory::initCubeMap(const char * right,
                      QImage(back));
 }
 
+QImage OpenGLTextureFactory::defaultTexture()
+{
+  QImage image({256, 256}, QImage::Format_RGBA8888);
+  image.fill(Qt::lightGray);
+
+  // Draw a red '?' to the center of the image.
+  QPainter painter(&image);
+  painter.setRenderHint(QPainter::Antialiasing);
+  painter.setPen(Qt::red);
+  painter.setFont({"Helvetica", 100, QFont::Bold});
+  constexpr QRect rect(0, 0, 256, 256);
+  painter.drawText(rect, Qt::AlignCenter, "?");
+
+  return image;
+}
+
 QOpenGLTexture * OpenGLTextureFactory::initCubeMap(const QImage & right,
                                                    const QImage & top,
                                                    const QImage & front,

src/qtk/texture.h

@@ -145,13 +145,7 @@ namespace Qtk
                                           const char * back);
 
       /// The texture used in place of a missing texture.
-      static QImage defaultTexture()
-      {
-        // Use plaster for default texture if image fails to load.
-        // This prevents segfaults when loading a texture that doesn't exist.
-        // TODO: Replace with a '?' texture to indicate missing texture.
-        return QImage(":/textures/plaster.png");
-      }
+      static QImage defaultTexture();
 
     private:
       // Private ctor to prevent creating instances of this class