restored previous renderer iteration for porting

app/widget/viewer/viewer.cpp

@@ -32,6 +32,7 @@
 
 ViewerWidget::ViewerWidget(QWidget *parent) :
   QWidget(parent),
+  video_renderer_(nullptr),
   viewer_node_(nullptr),
   playback_speed_(0)
 {
@@ -161,7 +162,6 @@ void ViewerWidget::ConnectViewerNode(ViewerOutput *node)
   }
 
   video_renderer_->SetViewerNode(viewer_node_);
-  opengl_backend_.SetViewerNode(viewer_node_);
 }
 
 void ViewerWidget::DisconnectViewerNode()

app/widget/viewer/viewer.h

@@ -30,7 +30,7 @@
 
 #include "common/rational.h"
 #include "node/output/viewer/viewer.h"
-#include "render/backend/opengl/openglbackend.h"
+#include "render/backend/videorenderbackend.h"
 #include "viewerglwidget.h"
 #include "viewersizer.h"
 #include "widget/playbackcontrols/playbackcontrols.h"
@@ -111,7 +111,7 @@ private:
   void PushScrubbedAudio();
 
   // FIXME: Test code only
-  OpenGLBackend opengl_backend_;
+  VideoRendererProcessor* video_renderer_;
   // End test code
 
   ViewerSizer* sizer_;

app/widget/viewer/viewerglwidget.cpp

@@ -25,8 +25,8 @@
 #include <QOpenGLFunctions>
 #include <QOpenGLTexture>
 
-#include "render/gl/functions.h"
-#include "render/gl/shadergenerators.h"
+#include "render/backend/opengl/functions.h"
+#include "render/backend/opengl/openglshader.h"
 
 ViewerGLWidget::ViewerGLWidget(QWidget *parent) :
   QOpenGLWidget(parent),
@@ -87,7 +87,7 @@ void ViewerGLWidget::paintGL()
 void ViewerGLWidget::SetupPipeline()
 {
   // Re-retrieve pipeline pertaining to this context
-  pipeline_ = olive::ShaderGenerator::OCIOPipeline(context(),
+  pipeline_ = OpenGLShader::CreateOCIO(context(),
                                                    ocio_lut_,
                                                    color_service_->GetProcessor(),
                                                    true);