From: Marek Olšák <marek.ol...@amd.com>
The swizzle has no effect on DCC encoding.
---
src/gallium/drivers/radeonsi/si_texture.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/src/gallium/drivers/radeonsi/si_texture.c
b/src/gallium/drivers/radeonsi/si_texture.c
index 5a29624f1fa..1f0de5e71ec 100644
--- a/src/gallium/drivers/radeonsi/si_texture.c
+++ b/src/gallium/drivers/radeonsi/si_texture.c
@@ -1926,38 +1926,32 @@ vi_get_dcc_channel_type(const struct
util_format_description *desc)
return dcc_channel_incompatible;
}
}
/* Return if it's allowed to reinterpret one format as another with DCC
enabled. */
bool vi_dcc_formats_compatible(enum pipe_format format1,
enum pipe_format format2)
{
const struct util_format_description *desc1, *desc2;
enum dcc_channel_type type1, type2;
- int i;
if (format1 == format2)
return true;
desc1 = util_format_description(format1);
desc2 = util_format_description(format2);
+ /* This constraint is only needed if we use the TC-compatible
+ * DCC clear encoding with the clear value of 1. */
if (desc1->nr_channels != desc2->nr_channels)
return false;
- /* Swizzles must be the same. */
- for (i = 0; i < desc1->nr_channels; i++)
- if (desc1->swizzle[i] <= PIPE_SWIZZLE_W &&
- desc2->swizzle[i] <= PIPE_SWIZZLE_W &&
- desc1->swizzle[i] != desc2->swizzle[i])
- return false;
-
type1 = vi_get_dcc_channel_type(desc1);
type2 = vi_get_dcc_channel_type(desc2);
return type1 != dcc_channel_incompatible &&
type2 != dcc_channel_incompatible &&
type1 == type2;
}
bool vi_dcc_formats_are_incompatible(struct pipe_resource *tex,
unsigned level,
--
2.15.1
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
