From fbc9a5d037ebb2a9b950d0b2e87aa654e4570f0e Mon Sep 17 00:00:00 2001
From: Anselme <anselme16@hotmail.fr>
Date: Mon, 7 Dec 2015 07:18:57 +0100
Subject: [PATCH] added posteffectmodule

---
 forwardmodule.cpp    |  9 +++++++++
 forwardmodule.h      |  9 ++++++++-
 framebuffer.cpp      | 18 +++++++++++++++---
 framebuffer.h        |  3 ++-
 posteffectmodule.cpp | 12 ++++++++++++
 posteffectmodule.h   | 17 +++++++++++++++++
 6 files changed, 63 insertions(+), 5 deletions(-)
 create mode 100644 posteffectmodule.cpp
 create mode 100644 posteffectmodule.h

diff --git a/forwardmodule.cpp b/forwardmodule.cpp
index 2d117db..0c58bfa 100644
--- a/forwardmodule.cpp
+++ b/forwardmodule.cpp
@@ -25,6 +25,9 @@ const char* const ForwardModule::lightStr[] =
 
 void ForwardModule::renderGL(Camera* myCamera, Scene* scene)
 {
+    // bind target
+    renderTarget->bindFBO();
+
     // render ambient lighting
     glAssert(glClearColor(0, 0.1f, 0.05f, 1.)); // add attribute, and setter for clear color
     glAssert(glClearDepth(1.0));
@@ -163,3 +166,9 @@ void ForwardModule::compileShaders(Scene* scene)
         }
     }
 }
+
+void ForwardModule::setRenderTarget(FrameBuffer* target)
+{
+    if(target != NULL)
+        renderTarget = target;
+}
diff --git a/forwardmodule.h b/forwardmodule.h
index 4651445..0512529 100644
--- a/forwardmodule.h
+++ b/forwardmodule.h
@@ -7,6 +7,7 @@
 #include <glew/glew.h>
 #include "shadersource.h"
 #include "material.h"
+#include "framebuffer.h"
 
 class Light;
 class Scene;
@@ -15,7 +16,10 @@ class PhongEntity;
 class ForwardModule : public Module
 {
 public:
-    ForwardModule() : shaderSources(NULL) {}
+    ForwardModule() :
+        shaderSources(NULL),
+        renderTarget(FrameBuffer::getScreen())
+    {}
 
     virtual void renderGL(Camera* myCamera, Scene* scene);
     virtual bool requiresModernOpenGL() {return true;} // write some compatibility code to change that to false
@@ -25,6 +29,8 @@ public:
     void setShaderSource(ShaderSource* source);
     void compileShaders(Scene* scene);
 
+    void setRenderTarget(FrameBuffer* target);
+
 private:
     enum {
         // light flags
@@ -41,6 +47,7 @@ private:
     ShaderSource* shaderSources;
     std::vector<Shader*> shaders;
     std::vector<unsigned int> flags;
+    FrameBuffer* renderTarget;
 
     void lightPass(Camera* myCamera, Scene* scene, Light* light, unsigned int type);
 };
diff --git a/framebuffer.cpp b/framebuffer.cpp
index 04bc564..8dd200e 100644
--- a/framebuffer.cpp
+++ b/framebuffer.cpp
@@ -2,14 +2,18 @@
 #include "texture.h"
 #include "glassert.h"
 
-FrameBuffer::FrameBuffer()
+FrameBuffer::FrameBuffer(bool isNULL)
 {
-    glAssert(glGenFramebuffers(1, &fbo));
+    if(isNULL)
+        fbo = 0;
+    else
+        glAssert(glGenFramebuffers(1, &fbo));
 }
 
 FrameBuffer::~FrameBuffer()
 {
-    glAssert(glDeleteFramebuffers(1, &fbo));
+    if(fbo != 0)
+        glAssert(glDeleteFramebuffers(1, &fbo));
 }
 
 void FrameBuffer::addTexture(Texture* tex, GLenum attachment)
@@ -35,3 +39,11 @@ Texture* FrameBuffer::getTexture(int texId)
 {
     return textures[texId];
 }
+
+FrameBuffer* FrameBuffer::getScreen()
+{
+    static FrameBuffer* screen = NULL;
+    if(screen != NULL)
+        screen = new FrameBuffer(true);
+    return screen;
+}
diff --git a/framebuffer.h b/framebuffer.h
index f5b35da..ae39694 100644
--- a/framebuffer.h
+++ b/framebuffer.h
@@ -13,13 +13,14 @@ protected:
     std::vector<Texture*> textures;
     std::vector<GLuint> attachments;
 public:
-    FrameBuffer();
+    FrameBuffer(bool isNULL = false);
     ~FrameBuffer();
     void addTexture(Texture* tex, GLenum attachment);
     void initGL();
 
     void bindFBO();
     Texture* getTexture(int texId);
+    static FrameBuffer* getScreen();
 };
 
 #endif // FRAMEBUFFER_H
diff --git a/posteffectmodule.cpp b/posteffectmodule.cpp
new file mode 100644
index 0000000..79b2c5b
--- /dev/null
+++ b/posteffectmodule.cpp
@@ -0,0 +1,12 @@
+#include "posteffectmodule.h"
+
+PostEffectModule::PostEffectModule()
+{
+
+}
+
+PostEffectModule::~PostEffectModule()
+{
+
+}
+
diff --git a/posteffectmodule.h b/posteffectmodule.h
new file mode 100644
index 0000000..ff76ac5
--- /dev/null
+++ b/posteffectmodule.h
@@ -0,0 +1,17 @@
+#ifndef POSTEFFECTMODULE_H
+#define POSTEFFECTMODULE_H
+
+#include "module.h"
+
+class FrameBuffer;
+
+class PostEffectModule : public Module
+{
+	FrameBuffer* inputFBO;
+	FrameBuffer* outputFBO;
+public:
+    PostEffectModule();
+    ~PostEffectModule();
+};
+
+#endif // POSTEFFECTMODULE_H