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| Linux 24 bit depth issue |
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Lucas Dalmasso
Member #20,839
August 2021
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Im doing some basic low level things with allegro like locking bitmaps and manipulating the memory inside. |
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Dizzy Egg
Member #10,824
March 2009
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Have you tried using al_set_new_bitmap_flags and choosing one of the 32-but flags ?
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Polybios
Member #12,293
October 2010
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IIRC you either get 24 or 32 bit modes depending on the system. You should be able to create a video bitmap with 32 bits in any case and work on that. But trying to force it as Dizzy Egg suggested is worth a try. |
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Mark Oates
Member #1,146
March 2001
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It's possible your machine doesn't support 32-bit depth. My MacBook Pro M1 has a 32-bit depth, but my MacMini only has 24. Same with my Windows laptop which only supports 24-bit depth. All of them are relatively new devices. Similar to what Dizzy said, you can pass 32 when creating your display and see if it sticks: int preferred_depth_size = 32; al_set_new_display_option(ALLEGRO_DEPTH_SIZE, preferred_depth_size, ALLEGRO_SUGGEST); ALLEGRO_DISPLAY *al_display = al_create_display(1920, 1080); if (!al_display) print("Display could not be created"); int actual_depth_size = al_get_display_option(al_display, ALLEGRO_DEPTH_SIZE); printf("Display depth info:\n - expected:%d\n - actual:%d", preferred_depth_size, actual_depth_size); What do you need specifically a 32 bit depth for, I'm curious. -- |
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