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panfrost: Disable early-z when alpha test is used

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Fixes rendering artefacts in Minetest on Midgard.

Fixes: 275277a2b4 ("panfrost: Implement alpha testing natively")
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9676>
This commit is contained in:
Icecream95 2021-03-18 20:02:22 +13:00 • committed by Marge Bot
parent 9d947127d3
commit ae62fb3737
1 changed files with 2 additions and 1 deletions
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3
src/gallium/drivers/panfrost/pan_cmdstream.c
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@ -490,7 +490,8 @@ panfrost_prepare_midgard_fs_state(struct panfrost_context *ctx,
/* Reasons to disable early-Z from a shader perspective */
bool late_z = fs->info.fs.can_discard || fs->info.writes_global ||
fs->info.fs.writes_depth || fs->info.fs.writes_stencil;
fs->info.fs.writes_depth || fs->info.fs.writes_stencil ||
(zsa->alpha_func != MALI_FUNC_ALWAYS);
/* If either depth or stencil is enabled, discard matters */
bool zs_enabled =