Merge pull request #504 from MihailRis/post-effects

Post-processing effects

res/preload.json

@@ -5,10 +5,12 @@
         "main",
         "lines",
         "entity",
-        "screen",
         "background",
         "skybox_gen"
     ],
+    "post-effects": [
+        "default"
+    ],
     "textures": [
         "gui/menubg",
         "gui/delete_icon",

res/shaders/effect.glslf

@@ -0,0 +1,13 @@
+in vec2 v_uv;
+out vec4 f_color;
+
+uniform sampler2D u_screen;
+uniform ivec2 u_screenSize;
+uniform float u_intensity;
+
+#include <__effect__>
+
+void main() {
+    f_color = effect();
+}
+

res/shaders/effect.glslv

@@ -1,13 +1,10 @@
 layout (location = 0) in vec2 v_position;
 
-out vec2 v_coord;
+out vec2 v_uv;
 
 uniform ivec2 u_screenSize;
-uniform float u_timer;
-uniform float u_dayTime;
 
 void main(){
-    v_coord = v_position * 0.5 + 0.5;
+    v_uv = v_position * 0.5 + 0.5;
     gl_Position = vec4(v_position, 0.0, 1.0);
 }
-

res/shaders/effects/default.glsl

@@ -0,0 +1,3 @@
+vec4 effect() {
+    return texture(u_screen, v_uv);
+}

res/shaders/effects/grayscale.glsl

@@ -0,0 +1,5 @@
+vec4 effect() {
+    vec3 color = texture(u_screen, v_uv).rgb;
+    float m = (color.r + color.g + color.b) / 3.0;
+    return vec4(mix(color, vec3(m), u_intensity), 1.0);
+}

res/shaders/effects/negative.glsl

@@ -0,0 +1,6 @@
+vec4 effect() {
+    vec4 color = texture(u_screen, v_uv);
+    color = mix(color, 1.0 - color, u_intensity);
+    color.a = 1.0;
+    return color;
+}

res/shaders/effects/vignette.glsl

@@ -0,0 +1,15 @@
+#include <commons>
+
+#param float p_radius = 1.1
+#param float p_softness = 0.7
+
+vec4 apply_vignette(vec4 color) {
+    vec2 position = v_uv - vec2(0.5);
+    float dist = length(position);
+    float vignette = smoothstep(p_radius, p_radius - p_softness, dist);
+    return vec4(color.rgb * vignette, 1.0);
+}
+
+vec4 effect() {
+    return apply_vignette(texture(u_screen, v_uv));
+}

res/shaders/screen.glslf

@@ -1,25 +0,0 @@
-in vec2 v_coord;
-out vec4 f_color;
-
-uniform sampler2D u_texture0;
-uniform ivec2 u_screenSize;
-
-// Vignette
-vec4 apply_vignette(vec4 color) {
-    vec2 position = (gl_FragCoord.xy / u_screenSize) - vec2(0.5);
-    float dist = length(position);
-
-    float radius = 1.3;
-    float softness = 1.0;
-    float vignette = smoothstep(radius, radius - softness, dist);
-
-    color.rgb = color.rgb * vignette;
-
-    return color;
-}
-
-void main() {
-    f_color = texture(u_texture0, v_coord);
-    f_color = apply_vignette(f_color);
-}
-