uniform sampler2D texture;
uniform vec4 color;

void main(){
    gl_FragColor = texture2D(texture, gl_TexCoord[0].xy) * color;
}

      char* tmp = (char*)texture->lock();
      for(int x = 0; x<texture->getSize().X; x += 4) {
          for(int y = 0; y<texture->getSize().y; ++y) {
               tmp[y * texture->getSize().X + x + 0] *= color_alpha;
               tmp[y * texture->getSize().X + x + 1] *= color_red;
               tmp[y * texture->getSize().X + x + 2] *= color_green;
               tmp[y * texture->getSize().X + x + 3] *= color_blue;
          }
     }