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mesa/st: use compute pbo download for readpixels

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this massively improves (>100%) ReadPixels perf in a number of cases

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29841>
This commit is contained in:
Mike Blumenkrantz
2024-06-21 09:41:58 -04:00
committed by Marge Bot
parent ef0a156670
commit 6f8e6fb99c
1 changed files with 7 additions and 0 deletions
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7
src/mesa/state_tracker/st_cb_readpixels.c
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@@ -435,6 +435,9 @@ st_ReadPixels(struct gl_context *ctx, GLint x, GLint y,
st_validate_state(st, ST_PIPELINE_UPDATE_FB_STATE_MASK);
st_flush_bitmap_cache(st);
if (rb->TexImage && st->force_compute_based_texture_transfer)
goto fallback;
if (!st->prefer_blit_based_texture_transfer) {
goto fallback;
}
@@ -565,5 +568,9 @@ st_ReadPixels(struct gl_context *ctx, GLint x, GLint y,
return;
fallback:
if (rb->TexImage && (st->allow_compute_based_texture_transfer || st->force_compute_based_texture_transfer)) {
if (st_GetTexSubImage_shader(ctx, x, y, 0, width, height, 1, format, type, pixels, rb->TexImage))
return;
}
_mesa_readpixels(ctx, x, y, width, height, format, type, pack, pixels);
}