tree c74845c55cd0cae06da4c62bcf55ef33e040bda1
parent 05de81ed7ef479b47318bfe2f31ee7b8483c4bd0
author Jonah Williams <jonahwilliams@google.com> 1743211988 -0700
committer GitHub <noreply@github.com> 1743211988 +0000
gpgsig -----BEGIN PGP SIGNATURE-----
 
 wsFcBAABCAAQBQJn503kCRC1aQ7uu5UhlAAAoSoQACPv8p3NgGdTBm9et3uq9Lct
 qdrXUiErB1NzItRMG8ZZcgZhF6mqhB5k0y96qhnkC7MYoSWgOzTvJr3Cp5HG7wMb
 a3omJwXDrU4ZszpeMOGe1SxzfL/gX6H/3wzjE3f9kitfnCGhc4lyAWI//35gkuOb
 Hs3oQ+L0z1PvIgGLbB9zAsJWsza4on++uWaApTKAesgsWLmi8QIAkzUBW42IwjYG
 swrhdSsvi+D0UryZvO8hVF7QFuqKTknSPy4Nozid3Fbu3MiCmrhu0/sJNqh6k9Db
 xr+KZStrxuoAqrtfQhrav8NHAbSbHUEyyAa6/zHVMtbptEvar5eJ33exT2vOoSA5
 uDI7SGxUfrozFetyuksYOYXvh3L3qLzM1quBoBrcFy/GeZ3un5eOJOeU/Mje+FZR
 8f/GpVYMZ1IoY65JBH/CanbtFv8zQlF+j12unrhJcpr3cPXui34V6O1F5sSm2VVu
 AbbIHp7Ix2Z1g8Ch/a8J2X78kfBj8r4b3E+fuksFKzI2Khzhun9hdriRstj1F1+G
 06MNRZXQcPk4NOj8hKx/MSkhpaf2iUXrBjEkKnDOLrXgxLFDQvz6/zM47o3K7IE3
 iMQzObkLlnOHW5SVKPwj13TfLQ2q9MKQItEsW5CrF7u7gwyVha2a8HkE2zOOFL27
 Pgd4xcqMPieWcLZjJ4tj
 =ZQjP
 -----END PGP SIGNATURE-----
 

[Impeller] optimize drawImageRect with blend and matrix color filter. (#165998)

Fixes https://github.com/flutter/flutter/issues/165959

Flame uses a lot of individual calls to drawImageRect w/ blend color
filters to color the sprites. This is much slower with Impeller today,
because we convert this into:

```
saveLayer(color filter)
drawImageRect
restore
```

Instead, we can detect this case and convert to a call to drawAtlas.
drawAtlas will use the porter-duff shader which removes the saveLayer
entirely. We could do this optimization while recording, but for now its
fine to do in dispatch.

We do have a snapshot optimization that catches "normal" image usage,
but it doesn't apply in the flame case as the source rects are sampling
from a larger texture and we don't have a way to pass those through the
snapshot system.

## Before

<img
src="https://github.com/user-attachments/assets/faada042-843f-4f15-af20-9baf862f66fd"
width="200"/>


## After

<img
src="https://github.com/user-attachments/assets/c83e061c-190f-4613-a725-88e16b776c04"
width="200"/>

---------

Co-authored-by: gaaclarke <30870216+gaaclarke@users.noreply.github.com>