Deltarune (Chapter 3) script viewer

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gml_GlobalScript_scr_chromakey

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global.__shd_chromakey_u_key_color = shader_get_uniform(shd_chromakey, "key_color");
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global.__shd_chromakey_u_similarity = shader_get_uniform(shd_chromakey, "similarity");
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global.__chromakey_surface = -1;
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global.__chromakey_mask_surface = -1;
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function surface_check(arg0, arg1, arg2)
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{
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    if (!surface_exists(arg0))
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    {
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        return surface_create(arg1, arg2);
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    }
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    else if (surface_get_width(arg0) != arg1 || surface_get_height(arg0) != arg2)
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    {
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        surface_resize(arg0, arg1, arg2);
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        return arg0;
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    }
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    return arg0;
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}
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function chromakey_mask_begin(arg0, arg1 = 0)
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{
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    global.__chromakey_mask_surface = surface_check(global.__chromakey_mask_surface, room_width, room_height);
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    surface_set_target(global.__chromakey_mask_surface);
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    draw_clear_alpha(c_black, 0);
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    gpu_set_blendmode_ext_sepalpha(bm_src_alpha, bm_inv_src_alpha, bm_one, bm_inv_src_alpha);
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    shader_set(shd_chromakey);
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    shader_set_uniform_f(global.__shd_chromakey_u_key_color, color_get_red(arg0) / 255, color_get_green(arg0) / 255, color_get_blue(arg0) / 255);
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    shader_set_uniform_f(global.__shd_chromakey_u_similarity, arg1);
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}
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function chromakey_mask_end()
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{
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    shader_reset();
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    surface_reset_target();
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}
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function chromakey_on()
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{
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    global.__chromakey_surface = surface_check(global.__chromakey_surface, room_width, room_height);
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    surface_set_target(global.__chromakey_surface);
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    draw_clear_alpha(c_black, 0);
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    gpu_set_blendmode_ext_sepalpha(bm_src_alpha, bm_inv_src_alpha, bm_one, bm_inv_src_alpha);
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}
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function chromakey_off()
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{
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    gpu_set_blendenable(false);
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    gpu_set_colorwriteenable(0, 0, 0, 1);
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    draw_surface(global.__chromakey_mask_surface, 0, 0);
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    gpu_set_blendenable(true);
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    gpu_set_colorwriteenable(1, 1, 1, 1);
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    surface_reset_target();
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    gpu_set_blendmode(bm_normal);
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    draw_surface(global.__chromakey_surface, 0, 0);
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}