Add CustomPaintWidget and super-super hacky initial 'rendering' test

qrenderdoc/CustomPaintWidget.cpp

@@ -0,0 +1,27 @@
+#include "CustomPaintWidget.h"
+#include <QPainter>
+
+#include "renderdoc_replay.h"
+
+extern ReplayOutput *out;
+extern TextureDisplay d;
+
+CustomPaintWidget::CustomPaintWidget(QWidget *parent) : QWidget(parent)
+{
+  setAttribute(Qt::WA_PaintOnScreen);
+}
+
+CustomPaintWidget::~CustomPaintWidget()
+{
+
+}
+
+void CustomPaintWidget::paintEvent(QPaintEvent *e)
+{
+  static float t = 0.0f;
+  t += 0.01f;
+  d.scale = 1.5f + sinf(t);
+  ReplayOutput_SetTextureDisplay(out, d);
+  ReplayOutput_Display(out);
+}
+