Jonah Williams d790b88806 [Impeller] Support copy from buffer to texture for GLES blitpass, use blit pass to set contents in glyph atlas. (flutter/engine#52510) ...

part of https://github.com/flutter/flutter/issues/138798

Works around https://github.com/flutter/flutter/issues/144498 for the glyph atlas.

Adds BlitPass::AddCopy implementation for GLES, which is mostly a copy of Texture::SetContents. Updates the glyph atlas to use a blit pass and device private textures instead of set contents (which is unsafely on Metal).

This also removes DeviceBuffer::AsTexture, which isn't actually used anywhere - and creates a linear texture on iOS (and fails with an unsupported API on simulators).

Note that in general, we don't actually have support for hostVisible textures on GLES _or_ Vulkan. Instead, VMA is falling back to device private textures. We may want to, separately, remove the concept of host visible from textures - and similarly remove the concept of transient from buffers.

2024-05-08 00:02:22 +00:00

..

src/flutter

[Impeller] Support copy from buffer to texture for GLES blitpass, use blit pass to set contents in glyph atlas. (flutter/engine#52510)

2024-05-08 00:02:22 +00:00