added simple crt shader

data/shaders/alpha_mask.frag

@@ -1,22 +0,0 @@
-
-in vec4 color;
-in vec2 texCoord;
-out vec4 fragColor;
-
-uniform sampler2D tex;
-uniform sampler2D mask_tex;
-
-uniform float offset_x;
-uniform float offset_y;
-uniform float resolution_x;
-uniform float resolution_y;
-uniform float mask_resolution_x;
-uniform float mask_resolution_y;
-
-void main(void)
-{
-	vec4 col = texture2D(tex, texCoord);
-	vec2 mask_coords = vec2((texCoord.x*resolution_x + offset_x)/mask_resolution_x, (texCoord.y*resolution_y + offset_y)/mask_resolution_y);
-	vec4 mask = texture2D(mask_tex, mask_coords);
-	fragColor = vec4(col.rgb, col.a*mask.a);
-}

data/shaders/crt-simple.frag

@@ -0,0 +1,23 @@
+varying vec4 color;
+varying vec2 texCoord;
+
+uniform sampler2D tex;
+uniform vec4 myColor;
+
+out vec4 fragColor;
+
+void main(void)
+{
+    vec4 c = myColor * color;
+
+	vec4 rgba = texture2D(tex, texCoord);
+    vec4 intensity;
+
+  if(fract(gl_FragCoord.y * (0.5 * 4.0 / 3.0)) > 0.5) {
+    intensity = vec4(0);
+  } else {
+    intensity = smoothstep(0.2, 0.8, rgba) + normalize(rgba);
+  }
+  
+    fragColor = intensity * -0.25 + rgba * 1.1;
+}

data/shaders/marching_ants.frag

@@ -1,51 +0,0 @@
-
-in vec4 color;
-in vec2 texCoord;
-out vec4 fragColor;
-
-uniform sampler2D tex;
-
-uniform float resolution_x;
-uniform float resolution_y;
-
-uniform float screen_w;
-uniform float screen_h;
-
-uniform float time;
-uniform float zoom;
-
-void main(void)
-{
-	float x_offset = 1.0/(screen_w*zoom) + 1.0/(resolution_x*zoom);
-	float y_offset = 1.0/(screen_h*zoom) + 1.0/(resolution_y*zoom);
-	
-	vec4 center = texture2D(tex, texCoord);
-	vec4 left = texture2D(tex, vec2(texCoord.s - x_offset, texCoord.t));
-	vec4 right = texture2D(tex, vec2(texCoord.s + x_offset, texCoord.t));
-	vec4 up = texture2D(tex, vec2(texCoord.s, texCoord.t - y_offset));
-	vec4 down = texture2D(tex, vec2(texCoord.s, texCoord.t + y_offset));
-	
-	bool is_image_edge = (texCoord.s - x_offset < 0 || texCoord.s + x_offset > 1 || texCoord.t - y_offset < 0 || texCoord.t + y_offset > 1);
-	
-	if(left.a != right.a || left.a != up.a || left.a != down.a || (center.a > 0.5 && is_image_edge))
-	{
-		if(center.a > 0.5)
-		{
-			float speed = 0.6;
-			float ant_size = 10;
-			float black_to_white_ratio = 0.5;
-			float ant_position = (gl_FragCoord.x + gl_FragCoord.y);
-			float t = step(black_to_white_ratio, mod(time*speed + ant_position/ant_size, 1.0));
-			
-			fragColor = vec4(t, t, t, 1);
-		}
-		else
-			fragColor = vec4(1, 1, 1, 1);
-	}
-	else if(center.a < 0.5)
-	{
-		fragColor = vec4(0, 0, 0, 0.1);
-	}
-	else
-		discard;
-}

data/shaders/untextured.frag

@@ -1,8 +0,0 @@
-#version 120
-
-varying vec4 color;
-
-void main(void)
-{
-    gl_FragColor = color;
-}

data/shaders/untextured.vert

@@ -1,13 +0,0 @@
-#version 120
-
-attribute vec3 gpu_Vertex;
-attribute vec4 gpu_Color;
-uniform mat4 gpu_ModelViewProjectionMatrix;
-
-varying vec4 color;
-
-void main(void)
-{
-    color = gpu_Color;
-    gl_Position = gpu_ModelViewProjectionMatrix * vec4(gpu_Vertex, 1.0);
-}