Improved shaders_postprocessing example

examples/shaders/resources/shaders/glsl100/sobel.fs

@@ -1,18 +1,17 @@
-#version 330
+#version 100
+
+precision mediump float;
 
 // Input vertex attributes (from vertex shader)
-in vec2 fragTexCoord;
-in vec4 fragColor;
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
 
 // Input uniform values
 uniform sampler2D texture0;
 uniform vec4 colDiffuse;
 
-// Output fragment color
-out vec4 finalColor;
-
 // NOTE: Add here your custom variables
-uniform vec2 resolution = vec2(800, 450);
+vec2 resolution = vec2(800.0, 450.0);
 
 void main() 
 {