[core] Refactor HeadlessBackend

1 files changed, 21 insertions, 14 deletions

diff --git a/platform/qt/test/headless_backend_qt.cpp b/platform/qt/test/headless_backend_qt.cpp
index 3f287ae578..f6552c4557 100644
--- a/platform/qt/test/headless_backend_qt.cpp
+++ b/platform/qt/test/headless_backend_qt.cpp
@@ -1,5 +1,4 @@
 #include <mbgl/platform/default/headless_backend.hpp>
-#include <mbgl/platform/default/headless_display.hpp>
 
 #include <QApplication>
 #include <QGLContext>
@@ -9,8 +8,22 @@
 #include <QOpenGLContext>
 #endif
 
+#include <cassert>
+
 namespace mbgl {
 
+struct QtImpl : public HeadlessBackend::Impl {
+    void activateContext() final {
+        widget.makeCurrent();
+    }
+
+    void deactivateContext() final {
+        widget.doneCurrent();
+    }
+
+    QGLWidget widget;
+};
+
 gl::glProc HeadlessBackend::initializeExtension(const char* name) {
 #if QT_VERSION >= 0x050000
         QOpenGLContext* thisContext = QOpenGLContext::currentContext();
@@ -21,26 +34,20 @@ gl::glProc HeadlessBackend::initializeExtension(const char* name) {
 #endif
 }
 
+bool HeadlessBackend::hasDisplay() {
+    return true;
+};
+
 void HeadlessBackend::createContext() {
+    assert(!hasContext());
+
     static const char* argv[] = { "mbgl" };
     static int argc = 1;
     static auto* app = new QApplication(argc, const_cast<char**>(argv));
 
     Q_UNUSED(app);
 
-    glContext = new QGLWidget;
-}
-
-void HeadlessBackend::destroyContext() {
-    delete glContext;
-}
-
-void HeadlessBackend::activateContext() {
-    glContext->makeCurrent();
-}
-
-void HeadlessBackend::deactivateContext() {
-    glContext->doneCurrent();
+    impl.reset(new QtImpl);
 }
 
 } // namespace mbgl