1 files changed, 49 insertions, 0 deletions
diff --git a/platform/qt/src/qmapboxgl_renderer_backend.cpp b/platform/qt/src/qmapboxgl_renderer_backend.cpp
new file mode 100644
index 0000000000..917741f5ce
--- /dev/null
+++ b/platform/qt/src/qmapboxgl_renderer_backend.cpp
@@ -0,0 +1,49 @@
+#include "qmapboxgl_renderer_backend.hpp"
+
+#include <QtGlobal>
+
+#if QT_VERSION >= 0x050000
+#include <QOpenGLContext>
+#else
+#include <QGLContext>
+#endif
+
+void QMapboxGLRendererBackend::updateAssumedState()
+{
+    assumeFramebufferBinding(ImplicitFramebufferBinding);
+    assumeViewport(0, 0, m_size);
+}
+
+void QMapboxGLRendererBackend::bind()
+{
+    assert(mbgl::BackendScope::exists());
+
+    setFramebufferBinding(m_fbo);
+    setViewport(0, 0, m_size);
+}
+
+mbgl::Size QMapboxGLRendererBackend::getFramebufferSize() const
+{
+    return m_size;
+}
+
+void QMapboxGLRendererBackend::updateFramebuffer(quint32 fbo, const mbgl::Size &size)
+{
+    m_fbo = fbo;
+    m_size = size;
+}
+
+/*!
+    Initializes an OpenGL extension function such as Vertex Array Objects (VAOs),
+    required by Mapbox GL Native engine.
+*/
+mbgl::gl::ProcAddress QMapboxGLRendererBackend::getExtensionFunctionPointer(const char* name)
+{
+#if QT_VERSION >= 0x050000
+    QOpenGLContext* thisContext = QOpenGLContext::currentContext();
+    return thisContext->getProcAddress(name);
+#else
+    const QGLContext* thisContext = QGLContext::currentContext();
+    return reinterpret_cast<mbgl::gl::ProcAddress>(thisContext->getProcAddress(name));
+#endif
+}