From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 24 May 2019 19:29:41 +0000 (+0300)
Subject: Create Stage pipeline when added to a view
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=e34e82619af0704b465e081f257f9952972e04b2;p=libs%2Fdemoscene.git

Create Stage pipeline when added to a view

Also remove add_postprocessor since it's kinda useless when the pipeline
is create at some random time during playback.
---

diff --git a/source/stage.cpp b/source/stage.cpp
index e1ce352..0ca5c5e 100644
--- a/source/stage.cpp
+++ b/source/stage.cpp
@@ -6,7 +6,8 @@ using namespace std;
 using namespace Msp;
 
 Stage::Stage():
-	pipeline(0)
+	pipeline(0),
+	last_view(0)
 { }
 
 Stage::~Stage()
@@ -19,11 +20,6 @@ void Stage::add_things(Demo::ThingMap &things, const string &prefix)
 	things[prefix+"camera"] = static_cast<GL::Placeable *>(&camera);
 }
 
-void Stage::add_postprocessor(GL::PostProcessor &pp)
-{
-	pipeline->add_postprocessor(pp);
-}
-
 void Stage::set_camera(const GL::Camera &c)
 {
 	camera.set_object_matrix(c.get_object_matrix());
@@ -53,6 +49,14 @@ void Stage::UseInView::validate() const
 
 void Stage::UseInView::start(float, float)
 {
+	if(!stage->pipeline || view!=stage->last_view)
+	{
+		stage->create_pipeline(*view);
+		if(!stage->pipeline)
+			throw logic_error("null pipeline");
+		stage->last_view = view;
+	}
+
 	view->set_camera(&stage->camera);
 	view->set_content(stage->pipeline);
 }
diff --git a/source/stage.h b/source/stage.h
index c108f6f..7d4664f 100644
--- a/source/stage.h
+++ b/source/stage.h
@@ -64,15 +64,19 @@ public:
 protected:
 	Msp::GL::Pipeline *pipeline;
 	Msp::GL::Camera camera;
+	Msp::GL::View *last_view;
 
 public:
 	Stage();
 	~Stage();
 
 	virtual void add_things(Demo::ThingMap &, const std::string &);
-	void add_postprocessor(Msp::GL::PostProcessor &);
+
 	void set_camera(const Msp::GL::Camera &);
 	Msp::GL::Camera &get_camera() { return camera; }
+
+protected:
+	virtual void create_pipeline(Msp::GL::View &) = 0;
 };
 
 #endif