From db448390ae22122732f3b385d9002089e39e9f93 Mon Sep 17 00:00:00 2001
From: Nigel <nigelbarink@hotmail.com>
Date: Sun, 16 Oct 2022 18:58:21 +0200
Subject: [PATCH] Small issue fix, Added post-processing fx

---
 Framebuffers.fs | 65 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/main.cpp    | 13 +++++++---
 2 files changed, 74 insertions(+), 4 deletions(-)

diff --git a/Framebuffers.fs b/Framebuffers.fs
index ec8960c..e0fe2c8 100644
--- a/Framebuffers.fs
+++ b/Framebuffers.fs
@@ -4,7 +4,72 @@ out vec4 FragColor;
 in vec2 TexCoords;
 
 uniform sampler2D screenTexure;
+const float offset = 1.0/ 300.0;
 
 void main(){
     FragColor = texture(screenTexure, TexCoords);
+
+   // Inversion filter
+   //FragColor =  vec4( vec3 (1.0 - texture(screenTexure, TexCoords) ), 1.0) ;
+
+
+    //grayscale
+    /*
+    FragColor = texture(screenTexure, TexCoords);
+    float average = (FragColor.r + FragColor.g + FragColor.b) / 3.0;
+    FragColor = vec4(average, average, average, 1.0);
+    */
+
+   // physically accurate grayscale 
+   // FragColor = texture(screenTexure, TexCoords);
+   // float average = 0.2126 * FragColor.r + 0.7152 * FragColor.g +  0.0722 * FragColor.b;
+   // FragColor = vec4(average,average,average, 1.0);
+
+   vec2 offset[9] = vec2[] (
+    vec2(-offset, offset),  // top-left
+    vec2(0.0f, offset),     // top-center
+    vec2(offset, offset),   // top-right
+    vec2(-offset, 0.0f),    // center-left
+    vec2(0.0f, 0.0f),       // center-center
+    vec2(offset, 0.0f),     // center-right
+    vec2(-offset, -offset), // bottom-left
+    vec2(0.0f, -offset),    // bottom-center
+    vec2(offset, -offset)   // bottom-right
+   );
+
+    // sharpen
+   /*float kernel[9] = float[](
+    -1, -1, -1,
+    -1,  9, -1,
+    -1, -1, -1
+   );*/
+
+    // blur
+    /* float kernel[9] = float[](
+     1.0 /16, 2.0 /16, 1.0 /16,
+     2.0 /16, 4.0 /16, 2.0 /16,
+     1.0 /16, 2.0 /16, 1.0 /16
+   );*/
+
+   // Edge-detection
+  /* float kernel[9] = float[] (
+    1, 1, 1,
+    1, -8, 1,
+    1, 1, 1
+   );
+
+   vec3 sampleTex[9];
+   for (int i= 0; i < 9; i++) {
+        sampleTex[i] = vec3(texture(screenTexure, TexCoords.st + offset[i]));
+   }
+
+   vec3 col = vec3(0.0);
+   for (int i = 0; i < 9; i++) {
+     col += sampleTex[i] * kernel[i];
+   }
+
+   FragColor = vec4(col, 1.0);
+*/ 
+
+
 }
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 01186c2..34ab34d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -265,16 +265,21 @@ while(!glfwWindowShouldClose(window))
 
    framebuffer.Bind();
    drawScene_pass(shader,  backpack);
-   outline_pass(outlineShader, backpack);
+   //outline_pass(outlineShader, backpack);
    
-   // Reset stencil 
+ 
+
+
+   DrawToScreen(ScreenVAO, ColourBuffer->id, framebufferShader);
+   
+  // Reset stencil 
    glStencilMask(0xFF);
    glStencilFunc(GL_ALWAYS, 1, 0xFF);   
    glEnable(GL_DEPTH_TEST); 
 
 
-   DrawToScreen(ScreenVAO, ColourBuffer->id, framebufferShader);
-   
+
+
    glfwSwapBuffers(window);
    glfwPollEvents();
 }