Update/merge examples back into main repo (#192)

Examples/resources/shaders/glsl120/pixelizer.fs

@@ -0,0 +1,30 @@
+#version 120
+
+// Input vertex attributes (from vertex shader)
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+
+// NOTE: Add here your custom variables
+
+// NOTE: Render size values must be passed from code
+const float renderWidth = 800.0;
+const float renderHeight = 450.0;
+
+float pixelWidth = 5.0;
+float pixelHeight = 5.0;
+
+void main()
+{
+    float dx = pixelWidth*(1.0/renderWidth);
+    float dy = pixelHeight*(1.0/renderHeight);
+
+    vec2 coord = vec2(dx*floor(fragTexCoord.x/dx), dy*floor(fragTexCoord.y/dy));
+
+    vec3 tc = texture2D(texture0, coord).rgb;
+
+    gl_FragColor = vec4(tc, 1.0);
+}