#if __VERSION__ < 130
#define TEXTURE2D texture2D
#else
#define TEXTURE2D texture
#endif

uniform float u_Time;
uniform sampler2D u_Tex0;
uniform sampler2D u_Tex1;
uniform sampler2D u_Tex2;
varying vec2 v_TexCoord;
varying vec2 v_TexCoord2;

uniform vec2 u_Resolution;
uniform float u_float1;
uniform float u_float2;
uniform float u_float3;
varying vec2 v_TexCoord3;
varying vec2 v_TexCoord4;
uniform float u_float4;

float _OutlineAlpha = 1.0;
float _OutlineGlow = 1.0;
float outline_thickness = 0.05;
vec4 _OutlineColor = vec4(1.0,1.0,0.0,0.0);

void main()
{
	vec4 _MainTex = TEXTURE2D(u_Tex0, v_TexCoord);
					vec2 destUv = vec2(0.01 * _MainTex.x, 0.01 * _MainTex.y);
					
					float outDistortAmnt = (TEXTURE2D(u_Tex1, v_TexCoord4).r - 0.5) * outline_thickness;
					destUv.x += outDistortAmnt;
					destUv.y += outDistortAmnt;

					float spriteLeft = TEXTURE2D(u_Tex0, v_TexCoord + vec2(destUv.x, 0)).a;
					float spriteRight = TEXTURE2D(u_Tex0, v_TexCoord - vec2(destUv.x, 0)).a;
					float spriteBottom = TEXTURE2D(u_Tex0, v_TexCoord + vec2(0, destUv.y)).a;
					float spriteTop = TEXTURE2D(u_Tex0, v_TexCoord - vec2(0, destUv.y)).a;
					float result = spriteLeft + spriteRight + spriteBottom + spriteTop;
					
					float spriteTopLeft = TEXTURE2D(u_Tex0, v_TexCoord + vec2(destUv.x, destUv.y)).a;
					float spriteTopRight = TEXTURE2D(u_Tex0, v_TexCoord + vec2(-destUv.x, destUv.y)).a;
					float spriteBotLeft = TEXTURE2D(u_Tex0, v_TexCoord + vec2(destUv.x, -destUv.y)).a;
					float spriteBotRight = TEXTURE2D(u_Tex0, v_TexCoord + vec2(-destUv.x, -destUv.y)).a;
					result = result + spriteTopLeft + spriteTopRight + spriteBotLeft + spriteBotRight;
					
					result = step(0.05, clamp(result,0.0,1.0));
					vec4 tempOutColor = TEXTURE2D(u_Tex2, v_TexCoord4);
					//tempOutColor *= _OutlineColor;
					_OutlineColor = tempOutColor;
					
					result *= (1.0 - _MainTex.a) * _OutlineAlpha;
					
					
					vec4 outline = _OutlineColor;
					//outline.rgb *= _OutlineGlow;
					//outline.a = result;
					gl_FragColor = mix(_MainTex, outline, result);
}