1 files changed, 35 insertions, 38 deletions

diff --git a/Assets/Shaders/crt_shader.gdshader b/Assets/Shaders/crt_shader.gdshader
index 5c698a6..456262a 100644
--- a/Assets/Shaders/crt_shader.gdshader
+++ b/Assets/Shaders/crt_shader.gdshader
@@ -1,30 +1,37 @@
-/*
-Godot 3 2D CRT Shader.
-A 2D shader for Godot 3 simulating a CRT..
-Author: hiulit
-Repository: https://github.com/hiulit/Godot-3-2D-CRT-Shader
-Issues: https://github.com/hiulit/Godot-3-2D-CRT-Shader/issues
-License: MIT https://github.com/hiulit/Godot-3-2D-CRT-Shader/blob/master/LICENSE
-*/
-
 shader_type canvas_item;
 
+uniform bool bloom_enabled = true;
+uniform float bloom_amount: hint_range(0.0, 0.5, 0.01) = 0.5;
+uniform float bloom_radius: hint_range(0.0, 10.0, 0.1) = 2.0;
 
 uniform bool chromatic_abberation_enabled = true;
 uniform float chromatic_abberation_amount : hint_range(0.0, 10.0, 0.01) = 4.0;
 
-uniform bool vignette_enabled = true;
-uniform float vignette_opacity : hint_range(0.0, 1.0, 0.01) = 0.2;
-
 uniform bool scan_lines_enabled = true;
 uniform float scan_lines_count : hint_range(0, 180, 1) = 180;
 uniform float scan_lines_opacity : hint_range(0.0, 1.0, 0.01) = 1.0;
 
+uniform bool vignette_enabled = true;
+uniform float vignette_opacity : hint_range(0.0, 1.0, 0.01) = 0.2;
+
 uniform float boost_intensity : hint_range(1.0, 2.0, 0.01) = 1.2;
 
 const float PI = 3.14159265359;
 
 /**
+ * Apply bloom.
+ */
+vec3 bloom(sampler2D tex, vec2 uv, vec2 pixel_size)
+{
+	vec3 glow0 = max(textureLod(tex, uv + vec2(-pixel_size.x, 0), bloom_radius).rgb - bloom_amount, vec3(0.0));
+	vec3 glow1 = max(textureLod(tex, uv + vec2(pixel_size.x,  0), bloom_radius).rgb - bloom_amount, vec3(0.0));
+	vec3 glow2 = max(textureLod(tex, uv + vec2(0, -pixel_size.y), bloom_radius).rgb - bloom_amount, vec3(0.0));
+	vec3 glow3 = max(textureLod(tex, uv + vec2(0,  pixel_size.y), bloom_radius).rgb - bloom_amount, vec3(0.0));
+	
+	return 0.25 * (glow0 + glow1 + glow2 + glow3);
+}
+
+/**
  * Apply chromatic abberation the the given texture.
  */
 vec3 chromatic_abberation(sampler2D tex, vec2 uv, vec2 screen_size) {
@@ -40,15 +47,6 @@ vec3 chromatic_abberation(sampler2D tex, vec2 uv, vec2 screen_size) {
 }
 
 /**
- * Apply a vignette.
- */
-vec3 vignette(vec3 color, vec2 uv, vec2 screen_size) {
-	float vignette = uv.x * uv.y * (1.0 - uv.x) * (1.0 - uv.y);
-	vignette = clamp(pow((screen_size.x / 4.0) * vignette, vignette_opacity), 0.0, 1.0);
-	return color * vignette;
-}
-
-/**
  * Apply scan lines
  */
 vec3 scan_lines(vec3 color, vec2 uv) {
@@ -57,27 +55,26 @@ vec3 scan_lines(vec3 color, vec2 uv) {
 	return color * scan_line * boost_intensity;
 }
 
+/**
+ * Apply a vignette.
+ */
+vec3 vignette(vec3 color, vec2 uv, vec2 screen_size) {
+	float vignette = uv.x * uv.y * (1.0 - uv.x) * (1.0 - uv.y);
+	vignette = clamp(pow((screen_size.x / 4.0) * vignette, vignette_opacity), 0.0, 1.0);
+	return color * vignette;
+}
+
 void fragment() {
 	vec3 color = texture(SCREEN_TEXTURE, SCREEN_UV).rgb;
 	vec2 screen_size = 1.0 / SCREEN_PIXEL_SIZE;
 
-	color = mix(
-		color,
-		chromatic_abberation(SCREEN_TEXTURE, SCREEN_UV, screen_size),
-		float(chromatic_abberation_enabled)
-	);
-
-	color = mix(
-		color,
-		vignette(color, SCREEN_UV, screen_size),
-		float(vignette_enabled)
-	);
+	vec3 bloom_color = bloom(SCREEN_TEXTURE, SCREEN_UV, SCREEN_PIXEL_SIZE);
+	vec3 scan_lines_color = scan_lines(color, SCREEN_UV);
 
-	color = mix(
-		color,
-		scan_lines(color, SCREEN_UV),
-		float(scan_lines_enabled)
-	);
+	color = mix(color, chromatic_abberation(SCREEN_TEXTURE, SCREEN_UV, screen_size), float(chromatic_abberation_enabled));
+	color = mix(color, bloom_color, 0.5 * float(bloom_enabled));
+	color = color + scan_lines(color, SCREEN_UV) * float(scan_lines_enabled);
+	color = color * vignette(color, SCREEN_UV, screen_size);
 
 	COLOR = vec4(color, 1.0);
-}
\ No newline at end of file
+}