From e485bf4ef5bf69406be2858a52629cada1bb765c Mon Sep 17 00:00:00 2001
From: falsycat <me@falsy.cat>
Date: Wed, 9 Oct 2019 00:00:00 +0000
Subject: [PATCH] [update] Added Context methods related to framebuffers.

---
 sjplayer/src/sjplayer/Context.d | 21 ++++++++++++++++++++-
 sjplayer/src/sjplayer/package.d | 10 ++++++----
 sjplayer/standalone/main.d      |  9 ++++++---
 3 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/sjplayer/src/sjplayer/Context.d b/sjplayer/src/sjplayer/Context.d
index 20535d0..e2a6863 100644
--- a/sjplayer/src/sjplayer/Context.d
+++ b/sjplayer/src/sjplayer/Context.d
@@ -15,6 +15,7 @@ import sjplayer.Actor,
        sjplayer.ContextBuilderInterface,
        sjplayer.ElementDrawerInterface,
        sjplayer.ElementInterface,
+       sjplayer.PostEffect,
        sjplayer.ProgramSet,
        sjplayer.ScheduledControllerInterface,
        sjplayer.VarStore;
@@ -23,9 +24,10 @@ import sjplayer.Actor,
 class Context {
  public:
   ///
-  this(ParametersBlock[] params, ProgramSet programs) {
+  this(ParametersBlock[] params, vec2i window_size, ProgramSet programs) {
     actor_      = new Actor(programs.Get!ActorProgram);
     background_ = new Background(programs.Get!BackgroundProgram);
+    posteffect_ = new PostEffect(programs.Get!PostEffectProgram, window_size);
 
     auto builder  = new Builder;
     auto varstore = new VarStore(actor_);
@@ -60,10 +62,14 @@ class Context {
   ///
   ~this() {
     controllers_.each!destroy;
+    actor_controller_.destroy();
+
     drawers_.each!destroy;
     elements_.each!destroy;
 
+    actor_.destroy();
     background_.destroy();
+    posteffect_.destroy();
   }
 
   ///
@@ -80,6 +86,16 @@ class Context {
     controllers_.each!(x => x.Operate(time));
   }
 
+  ///
+  void StartDrawing() {
+    posteffect_.BindFramebuffer();
+  }
+  ///
+  void EndDrawing() {
+    posteffect_.UnbindFramebuffer();
+    posteffect_.DrawFramebuffer();
+  }
+
   ///
   void DrawBackground() {
     background_.Draw();
@@ -119,6 +135,9 @@ class Context {
   Background background_;
   invariant(background_);
 
+  PostEffect posteffect_;
+  invariant(posteffect_);
+
   ElementInterface[] elements_;
 
   ElementDrawerInterface[] drawers_;
diff --git a/sjplayer/src/sjplayer/package.d b/sjplayer/src/sjplayer/package.d
index 9993ce7..8cc3f53 100644
--- a/sjplayer/src/sjplayer/package.d
+++ b/sjplayer/src/sjplayer/package.d
@@ -1,6 +1,8 @@
 /// License: MIT
 module sjplayer;
 
+import gl4d;
+
 import sjscript;
 
 public {
@@ -9,11 +11,11 @@ public {
 }
 
 ///
-Context CreateContextFromText(string src, ProgramSet programs) {
-  return src.CreateScriptAst().CreateContextFromScriptAst(programs);
+Context CreateContextFromText(string src, vec2i window_size, ProgramSet programs) {
+  return src.CreateScriptAst().CreateContextFromScriptAst(window_size, programs);
 }
 ///
 Context CreateContextFromScriptAst(
-    ParametersBlock[] params, ProgramSet programs) {
-  return new Context(params, programs);
+    ParametersBlock[] params, vec2i window_size, ProgramSet programs) {
+  return new Context(params, window_size, programs);
 }
diff --git a/sjplayer/standalone/main.d b/sjplayer/standalone/main.d
index 551f775..3fd3fe2 100644
--- a/sjplayer/standalone/main.d
+++ b/sjplayer/standalone/main.d
@@ -25,7 +25,8 @@ int main(string[] args) {
   auto programs = new ProgramSet;
   scope(exit) programs.destroy();
 
-  auto context = script_file.readText.CreateContextFromText(programs);
+  auto context = script_file.readText.
+    CreateContextFromText(vec2i(600, 600), programs);
   scope(exit) context.destroy();
 
   while (true) {
@@ -39,10 +40,13 @@ int main(string[] args) {
     context.OperateScheduledControllers(beat);
     context.UpdateActor(vec2(0, 0));
 
-    gl.Clear(GL_COLOR_BUFFER_BIT);
+    context.StartDrawing();
+
     context.DrawBackground();
     context.DrawElements();
     context.DrawActor();
+
+    context.EndDrawing();
     sfWindow_display(win);
   }
   return 0;
@@ -70,6 +74,5 @@ sfWindow* Initialize() {
   gl.ApplyContext();
   gl.Enable(GL_BLEND);
   gl.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
   return win;
 }