https://github.com/bbbbbr/gb-window-as-sprite

Demo using the video overlay Window as a huge pseudo-sprite for the original Game Boy (DMG/CGB)
https://github.com/bbbbbr/gb-window-as-sprite

game-boy gameboy gameboy-game retro-gaming

Last synced: about 1 year ago
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Demo using the video overlay Window as a huge pseudo-sprite for the original Game Boy (DMG/CGB)

• Host: GitHub
• URL: https://github.com/bbbbbr/gb-window-as-sprite
• Owner: bbbbbr
• License: unlicense
• Created: 2019-06-29T01:29:44.000Z (almost 7 years ago)
• Default Branch: release_gbdk2020
• Last Pushed: 2021-06-12T06:13:45.000Z (almost 5 years ago)
• Last Synced: 2025-03-29T04:24:11.411Z (about 1 year ago)
• Topics: game-boy, gameboy, gameboy-game, retro-gaming
• Language: C
• Size: 409 KB
• Stars: 7
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
Game Boy Window as a Giant Sprite

===========

The original Game Boy (DMG/CGB/etc) is limited to 8x8 and 8x16 sprites, or a larger meta-sprite composed from up to 40 of those smaller, individually managed sprites. There are some workarounds, but generally this limits the maximum size of sprites to a small size on an already small screen.

As an exercise, this demos using the video overlay Window as a huge pseudo-sprite (with some limitations). The priority feature and transparent pixels of regular sprites are used to create some foreground/background layering.

* Star sprites: S_PRIORITY flag set so they appear behind the Window sprite, except where it's pixels are set to color zero.

* Game Boy sprites: S_PRIORITY flag *not* set so it's above the Window sprite.

* Background layer: All pixels set to color zero.

![Game Boy video overlay window Giant Sprite demo - nyancat cassette](https://raw.githubusercontent.com/bbbbbr/gb-window-as-sprite/release/info/screenshot_anim.gif)

Built with GBDK-2020 - https://github.com/gbdk-2020/gbdk-2020