Create Framebuffer render function

res/shaders/postprocessing.frag

@@ -1,6 +1,6 @@
 #version 330 core
 
-const float GAMMA = 2.0f;
+const float GAMMA = 2.2f;
 
 layout(location = 0) out vec4 f_color;
 

src/Controller.cpp

@@ -115,7 +115,7 @@ void Controller::run() {
     
     camera->translate(glm::vec3(0.0f, 1.5f, 5.0f));
 
-    pp_framebuffer = new Framebuffer(INIT_WINDOW_WIDTH, INIT_WINDOW_HEIGHT);
+    pp_framebuffer = new Framebuffer(INIT_WINDOW_WIDTH, INIT_WINDOW_HEIGHT, &postProcessingProgram);
 
     // This is the game loop
     while(!glfwWindowShouldClose(gameWindow->getGLFWwindow())) {
@@ -150,17 +150,7 @@ void Controller::run() {
         world.draw(camera->getViewProj(), camera->getPosition());
         pp_framebuffer->unbind();
 
-        postProcessingProgram.bind();
-        glActiveTexture(GL_TEXTURE0);
-        glBindTexture(GL_TEXTURE_2D, pp_framebuffer->getTextureId());
-        GLint location = glGetUniformLocation(postProcessingProgram.getShaderProgramId(), "u_texture");
-        glUniform1i(location, 0);
-        GLuint temp_vao;
-        glGenVertexArrays(1, &temp_vao);
-        glBindVertexArray(temp_vao);
-        glDrawArrays(GL_TRIANGLES, 0, 3);
-        glBindVertexArray(0);
-        postProcessingProgram.unbind();
+        pp_framebuffer->render();
 
         #ifdef _DEBUG
         renderImGui(world.getEntities(), &world.getPointLights()[0], &lightColor, &rotateLightSource);
@@ -170,7 +160,7 @@ void Controller::run() {
             
         // Update window size
         if(gameWindow->checkWindowWasResized())
-            updateWindowSize();
+            updateWindowSize(&postProcessingProgram);
 
         // Check events, handle input
         gameEventHandler->handleEvents();
@@ -211,12 +201,12 @@ void Controller::error_callback(int error, const char* description) {
     fprintf(stderr, "Error: %s\n", description);
 }
 
-void Controller::updateWindowSize() {
+void Controller::updateWindowSize(ShaderProgram *pp_program) {
     camera->updateAspectRatio(gameWindow->getWindowAspectRatio());
     gameEventHandler->setFirstMouseInput(1);
 
     delete pp_framebuffer;
-    pp_framebuffer = new Framebuffer(gameWindow->getWindowWidth(), gameWindow->getWindowHeight());
+    pp_framebuffer = new Framebuffer(gameWindow->getWindowWidth(), gameWindow->getWindowHeight(), pp_program);
 }
 
 #ifdef _DEBUG

src/Controller.h

@@ -26,7 +26,7 @@ private:
 
     void limit_framerate();
 
-    void updateWindowSize();
+    void updateWindowSize(ShaderProgram *pp_program);
 
     void renderImGui(std::vector<Entity> *entites, PointLight *pointLight, glm::vec3 *lightColor, bool *rotateLightSource);
 

src/Framebuffer.cpp

@@ -2,7 +2,9 @@
 
 #include <cstddef>
 
-Framebuffer::Framebuffer(uint32_t width, uint32_t height) {
+Framebuffer::Framebuffer(uint32_t width, uint32_t height, ShaderProgram *shaderProgram) {
+
+    this->shaderProgram = shaderProgram;
 
     glGenFramebuffers(1, &FBO);
 
@@ -37,3 +39,19 @@ void Framebuffer::bind() {
 void Framebuffer::unbind() {
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
+
+void Framebuffer::render() {
+        shaderProgram->bind();
+        glActiveTexture(GL_TEXTURE0);
+        glBindTexture(GL_TEXTURE_2D, getTextureId());
+        GLint location = glGetUniformLocation(shaderProgram->getShaderProgramId(), "u_texture");
+        glUniform1i(location, 0);
+
+        // A VAO is necessary although no data is stored in it
+        GLuint temp_vao;
+        glGenVertexArrays(1, &temp_vao);
+        glBindVertexArray(temp_vao);
+        glDrawArrays(GL_TRIANGLES, 0, 3);
+        glBindVertexArray(0);
+        shaderProgram->unbind();
+}

src/Framebuffer.h

@@ -1,17 +1,20 @@
 #pragma once
 
 #include <glad/glad.h>
+#include "ShaderProgram.h"
 
 class Framebuffer {
 
 public:
 
-    Framebuffer(uint32_t width, uint32_t height);
+    Framebuffer(uint32_t width, uint32_t height, ShaderProgram *ShaderProgram);
     ~Framebuffer();
 
     void bind();
     void unbind();
 
+    void render();
+
     GLuint getTextureId() {
         return textures[0];
     }
@@ -21,4 +24,6 @@ private:
     GLuint FBO;
     GLuint textures[2];
 
+    ShaderProgram *shaderProgram;
+
 };

src/World.cpp

@@ -20,7 +20,7 @@ World::World(ShaderProgram *shaderProgram)
 
     // This will be removed in future when gloss maps are implemented
     shaderProgram->bind();
-    shaderProgram->setUniform("u_material.shininess", 64.0f);
+    shaderProgram->setUniform("u_material.shininess", 100.0f);
     shaderProgram->unbind();
 
 }