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metal: preserve render buffer contents in more situations

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This commit is contained in:
Julian Orth 2026-02-13 17:05:30 +01:00
parent dce572865b
commit 410e4676ce
2 changed files with 53 additions and 29 deletions
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42
src/backends/metal/video.rs
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@ -41,7 +41,7 @@ use {
asyncevent::AsyncEvent, binary_search_map::BinarySearchMap, bitflags::BitflagsExt,
cell_ext::CellExt, clonecell::CloneCell, copyhashmap::CopyHashMap, errorfmt::ErrorFmt,
geometric_decay::GeometricDecay, numcell::NumCell, on_change::OnChange,
opaque_cell::OpaqueCell, ordered_float::F64, oserror::OsError,
opaque_cell::OpaqueCell, ordered_float::F64, oserror::OsError, rc_eq::rc_eq,
},
video::{
INVALID_MODIFIER, Modifier,
@ -66,6 +66,7 @@ use {
std::{
cell::{Cell, RefCell},
collections::hash_map::Entry,
error::Error,
ffi::CString,
fmt::{Debug, Formatter},
mem,
@ -3021,4 +3022,43 @@ impl RenderBuffer {
self.damage_queue.clear_all();
self.damage_queue.damage(&[rect]);
}
pub fn clear(&self, cd: &Rc<ColorDescription>) -> Result<Option<SyncFile>, Box<dyn Error>> {
self.dev_fb
.clear(AcquireSync::Unnecessary, ReleaseSync::Explicit, cd)
.map_err(Into::into)
}
pub fn copy_to_new(
&self,
new: &Self,
cd: &Rc<ColorDescription>,
) -> Result<Option<SyncFile>, Box<dyn Error>> {
let old = self;
let copy_texture = |new: &Rc<dyn GfxFramebuffer>, old: &Rc<dyn GfxTexture>| {
new.copy_texture(
AcquireSync::Unnecessary,
ReleaseSync::Explicit,
cd,
old,
cd,
None,
AcquireSync::Unnecessary,
ReleaseSync::Explicit,
0,
0,
)
.map_err(Into::into)
};
if rc_eq(&old.dev_ctx, &new.dev_ctx) {
return copy_texture(&new.dev_fb, old.dev_tex.as_ref().unwrap_or(&old.render_tex));
}
let tex = new
.dev_ctx
.gfx
.clone()
.dmabuf_img(old.dev_bo.dmabuf())?
.to_texture()?;
copy_texture(&new.dev_fb, &tex)
}
}