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iris: Use the linear version of the surface format during fast clears.

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Newer gens (> 9) will start doing the linear -> sRGB conversion of the
clear color for us, if we use a sRGB surface format. So let's make sure
that doesn't happen and keep the same semantics as before.

Even though the hardware could convert the clear color for us during
fast clear, that converted color is only used for sampling. For resolve,
the original color would be used (without the conversion). So we convert
it ourselves and the same converted color gets used for both sampling
and resolving, simplifying the whole logic.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Rafael Antognolli 2019-04-23 15:18:01 -07:00
parent 56927a8cf5
commit 91bcbfc351
1 changed files with 7 additions and 1 deletions
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8
src/gallium/drivers/iris/iris_clear.c
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@ -269,7 +269,13 @@ fast_clear_color(struct iris_context *ice,
iris_blorp_surf_for_resource(&ice->vtbl, &surf, p_res, res->aux.usage,
level, true);
blorp_fast_clear(&blorp_batch, &surf, format,
/* In newer gens (> 9), the hardware will do a linear -> sRGB conversion of
* the clear color during the fast clear, if the surface format is of sRGB
* type. We use the linear version of the surface format here to prevent
* that from happening, since we already do our own linear -> sRGB
* conversion in convert_fast_clear_color().
*/
blorp_fast_clear(&blorp_batch, &surf, isl_format_srgb_to_linear(format),
level, box->z, box->depth,
box->x, box->y, box->x + box->width,
box->y + box->height);