"#ifdef GL_ES\n"
"precision highp float;\n"
"#endif\n"
"attribute vec4 vertex;\n"
"attribute vec2 tex_coord;\n"
"attribute vec2 tex_sample;\n"
"uniform mat4 mvp;\n"
"varying vec2 tex_c;\n"
"varying vec2 tex_s[4];\n"
"varying vec4 div_s;\n"
"void main()\n"
"{\n"
"   gl_Position = mvp * vertex;\n"
"   tex_c = tex_coord;\n"
"   tex_s[0] = vec2(-tex_sample.x, -tex_sample.y);\n"
"   tex_s[1] = vec2( tex_sample.x, -tex_sample.y);\n"
"   tex_s[2] = vec2( tex_sample.x,  tex_sample.y);\n"
"   tex_s[3] = vec2(-tex_sample.x,  tex_sample.y);\n"
"   div_s = vec4(4, 4, 4, 4);\n"
"}\n"