bevy/crates/bevy_sprite
IceSentry 9de25ad330
Add AlphaMask2d phase (#14724)
# Objective

- Bevy now supports an opaque phase for mesh2d, but it's very common for
2d textures to have a transparent alpha channel.

## Solution

- Add an alpha mask phase identical to the one in 3d. It will do the
alpha masking in the shader before drawing the mesh.
- Uses the BinnedRenderPhase
- Since it's an opaque draw it also correctly writes to depth

## Testing

- Tested the mes2d_alpha_mode example and the bevymark example with
alpha mask mode enabled

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## Showcase


![image](https://github.com/user-attachments/assets/9e5e4561-d0a7-4aa3-b049-d4b1247d5ed4)

The white logo on the right is rendered with alpha mask enabled.

Running the bevymark example I can get 65fps for 120k mesh2d all using
alpha mask.

## Notes

This is one more step for mesh2d improvements
https://github.com/bevyengine/bevy/issues/13265

---------

Co-authored-by: Kristoffer Søholm <k.soeholm@gmail.com>
2024-08-15 14:10:37 +00:00
..
src Add AlphaMask2d phase (#14724) 2024-08-15 14:10:37 +00:00
Cargo.toml Use BinnedRenderPhase for Opaque2d (#13091) 2024-08-12 15:38:24 +00:00
README.md Add README.md to all crates (#13184) 2024-05-02 18:56:00 +00:00

Bevy Sprite

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