if (!surface_exists(screensurface))
    screensurface = surface_create(640, 480);
surface_copy(screensurface, 0, 0, application_surface);
shader_replace_simple_set_hook(47);
shader_set_uniform_f(i_idx, 1);
shader_set_uniform_f(i_width, sprite_get_width(palette));
shader_set_uniform_f(i_height, sprite_get_height(palette));
shader_set_uniform_f(i_blend, clamp(timer - 12, 0, 1));
var uvs = sprite_get_uvs(palette, 0);
shader_set_uniform_f(i_uvs, uvs[0], uvs[1], uvs[2], uvs[3]);
var t_sampler = shader_get_sampler_index(shd_palettemapper_simple, "iPalette");
texture_set_stage(t_sampler, sprite_get_texture(palette, 0));
draw_surface(screensurface, camerax(), cameray());
shader_replace_simple_reset_hook();