From 00a4b8e1e20c65cfd142591b8d0ed768056ec124 Mon Sep 17 00:00:00 2001
From: EmaMaker <emamaker0@gmail.com>
Date: Sun, 17 Sep 2023 15:48:11 +0200
Subject: [PATCH] renderer: properly handle framebuffer resizing

---
 include/renderer.hpp |  4 +++-
 src/main.cpp         |  2 +-
 src/renderer.cpp     | 18 ++++++++++++++----
 3 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/include/renderer.hpp b/include/renderer.hpp
index 7ade5b6..f7c1a58 100644
--- a/include/renderer.hpp
+++ b/include/renderer.hpp
@@ -12,9 +12,11 @@ namespace renderer{
     typedef oneapi::tbb::concurrent_unordered_set<Chunk::Chunk*> RenderSet;
 
     void init(GLFWwindow* window);
-    void render(GLFWwindow* window);
+    void render();
+    void resize_framebuffer(int width, int height);
     void framebuffer_size_callback(GLFWwindow *window, int width, int height);
     void destroy();
+
     Shader* getRenderShader();
     RenderSet& getChunksToRender();
     oneapi::tbb::concurrent_queue<chunkmesher::MeshData*>& getMeshDataQueue();
diff --git a/src/main.cpp b/src/main.cpp
index ea1172f..161920f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -99,7 +99,7 @@ int main()
 	if(glfwGetTime() - lastBlockPick > 0.1) blockpick = false;
 
 	// Render pass
-	renderer::render(window);
+	renderer::render();
 
         // Swap buffers to avoid tearing
         glfwSwapBuffers(window);
diff --git a/src/renderer.cpp b/src/renderer.cpp
index 9c27a65..073a1af 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -23,7 +23,6 @@ namespace renderer{
     GLuint renderTexFrameBuffer, renderTex, renderTexDepthBuffer, quadVAO, quadVBO;
     int screenWidth, screenHeight;
 
-
     void init(GLFWwindow* window){
 	// Setup rendering
 	// We will render the image to a texture, then display the texture on a quad that fills the
@@ -105,9 +104,10 @@ namespace renderer{
     }
 
 
-    void render(GLFWwindow* window){
+    void render(){
 	// Bind the frame buffer to render to the texture
 	glBindFramebuffer(GL_FRAMEBUFFER, renderTexFrameBuffer);
+	glViewport(0, 0, screenWidth, screenHeight);
 	glEnable(GL_DEPTH_TEST);
 	if(wireframe) glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
 	else glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
@@ -220,14 +220,24 @@ namespace renderer{
     }
 
     void framebuffer_size_callback(GLFWwindow *window, int width, int height){
+	resize_framebuffer(width, height);
+    }
+
+    void resize_framebuffer(int width, int height){
 	screenWidth = width;
 	screenHeight = height;
 
+	theCamera.viewPortCallBack(nullptr, width, height);
+
+	glBindFramebuffer(GL_FRAMEBUFFER, renderTexFrameBuffer);
 	glBindTexture(GL_TEXTURE_2D, renderTex);
-	glTexImage2D(GL_TEXTURE_2D, 0,GL_RGB, screenWidth, screenHeight, 0,GL_RGB, GL_UNSIGNED_BYTE, 0); // Support
+	glTexImage2D(GL_TEXTURE_2D, 0,GL_RGB, width, height, 0,GL_RGB, GL_UNSIGNED_BYTE, 0); // Support
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, renderTex, 0);
 
 	glBindRenderbuffer(GL_RENDERBUFFER, renderTexDepthBuffer);
-	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, screenWidth, screenHeight); //Support up to
+	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height); //Support up to
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
+		renderTexDepthBuffer);
     }
 
     void destroy(){