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> Replaces #5213 # Objective Implement sprite tiling and [9 slice scaling](https://en.wikipedia.org/wiki/9-slice_scaling) for `bevy_sprite`. Allowing slice scaling and texture tiling. Basic scaling vs 9 slice scaling:  Slicing example: <img width="481" alt="Screenshot 2022-07-05 at 15 05 49" src="https://user-images.githubusercontent.com/26703856/177336112-9e961af0-c0af-4197-aec9-430c1170a79d.png"> Tiling example: <img width="1329" alt="Screenshot 2023-11-16 at 13 53 32" src="https://github.com/bevyengine/bevy/assets/26703856/14db39b7-d9e0-4bc3-ba0e-b1f2db39ae8f"> # Solution - `SpriteBundlue` now has a `scale_mode` component storing a `SpriteScaleMode` enum with three variants: - `Stretched` (default) - `Tiled` to have sprites tile horizontally and/or vertically - `Sliced` allowing 9 slicing the texture and optionally tile some sections with a `Textureslicer`. - `bevy_sprite` has two extra systems to compute a `ComputedTextureSlices` if necessary,: - One system react to changes on `Sprite`, `Handle<Image>` or `SpriteScaleMode` - The other listens to `AssetEvent<Image>` to compute slices on sprites when the texture is ready or changed - I updated the `bevy_sprite` extraction stage to extract potentially multiple textures instead of one, depending on the presence of `ComputedTextureSlices` - I added two examples showcasing the slicing and tiling feature. The addition of `ComputedTextureSlices` as a cache is to avoid querying the image data, to retrieve its dimensions, every frame in a extract or prepare stage. Also it reacts to changes so we can have stuff like this (tiling example): https://github.com/bevyengine/bevy/assets/26703856/a349a9f3-33c3-471f-8ef4-a0e5dfce3b01 # Related - [ ] Once #5103 or #10099 is merged I can enable tiling and slicing for texture sheets as ui # To discuss There is an other option, to consider slice/tiling as part of the asset, using the new asset preprocessing but I have no clue on how to do it. Also, instead of retrieving the Image dimensions, we could use the same system as the sprite sheet and have the user give the image dimensions directly (grid). But I think it's less user friendly --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> Co-authored-by: ickshonpe <david.curthoys@googlemail.com> Co-authored-by: Alice Cecile <alice.i.cecil@gmail.com> |
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