Cocos2DX Vertex Blend and Light Map Shader

lmap_blend1.vert

attribute vec4 a_position;
attribute vec2 a_texCoord;
attribute vec2 a_texCoord1;
attribute vec2 a_texCoord2;
attribute vec4 a_color;
varying vec4 v_color;
varying vec2 v_texture_coord;
varying vec2 v_texture_coord1;
varying vec2 v_texture_coord2;

void main(void)
{
    gl_Position = CC_MVPMatrix * a_position;
    v_texture_coord = a_texCoord;
    v_texture_coord.y = (1.0 - v_texture_coord.y);
    v_texture_coord1 = a_texCoord1;
    v_texture_coord1.y = (1.0 - v_texture_coord1.y);
    v_texture_coord2 = a_texCoord2;
    v_texture_coord2.y = (1.0 - v_texture_coord2.y);
    v_color = a_color;
}

lmap_blend2.frag

#ifdef GL_ES
varying mediump vec2 v_texture_coord;
varying mediump vec2 v_texture_coord1;
varying mediump vec2 v_texture_coord2;
varying mediump vec4 v_color;
#else
varying vec4 v_color;
varying vec2 v_texture_coord;
varying vec2 v_texture_coord1;
varying vec2 v_texture_coord2;
#endif

uniform sampler2D lightmap;
uniform sampler2D blend;

void main(void)
{
    gl_FragColor = mix(texture2D(CC_Texture0, v_texture_coord),texture2D(blend, v_texture_coord1), v_color.r) * (texture2D(lightmap, v_texture_coord2) * 2.0);
}