ShaderToy wrapper

gistfile1.glsl

// VERTEX SHADER 
 
attribute vec2 pos;
void main() {
    gl_Position = vec4(pos.xy,0.0,1.0);
}
 
// FRAGMENT SHADER 
 
#ifdef GL_ES
precision highp float;
#endif
#extension GL_OES_standard_derivatives : enable
uniform vec3      iResolution;
uniform float     iGlobalTime;
uniform float     iChannelTime[4];
uniform vec4      iMouse;
uniform vec4      iDate;
uniform float     iSampleRate;
uniform vec3      iChannelResolution[4];
uniform sampler2D iChannel0;
uniform sampler2D iChannel1;
uniform sampler2D iChannel2;
uniform sampler2D iChannel3;
 
// Shader Code
 
void main( void ){
    vec4 color = vec4(0.0,0.0,0.0,1.0);
    mainImage( color, gl_FragCoord.xy );
    color.w = 1.0;
    gl_FragColor = color;
}