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isl: add new helper for format component compatibility 

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17329>
This commit is contained in:
Lionel Landwerlin 2022-07-01 10:43:21 +03:00 committed by Marge Bot
parent 10cd9ce606
commit ab4beaf3fb
2 changed files with 25 additions and 7 deletions
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3
src/intel/isl/isl.h
View File

@ -1872,6 +1872,9 @@ bool isl_formats_are_ccs_e_compatible(const struct intel_device_info *devinfo,
uint8_t isl_format_get_aux_map_encoding(enum isl_format format);
uint8_t isl_get_render_compression_format(enum isl_format format);
bool isl_formats_have_same_bits_per_channel(enum isl_format format1,
enum isl_format format2);
bool isl_format_has_unorm_channel(enum isl_format fmt) ATTRIBUTE_CONST;
bool isl_format_has_snorm_channel(enum isl_format fmt) ATTRIBUTE_CONST;
bool isl_format_has_ufloat_channel(enum isl_format fmt) ATTRIBUTE_CONST;

29
src/intel/isl/isl_format.c
View File

@ -948,6 +948,27 @@ isl_format_supports_multisampling(const struct intel_device_info *devinfo,
}
}
/**
* Returns true if the two formats are component size compatible meaning that
* each component from one format has the same number of bits as the other
* format.
*
* This is useful to check whether an image used with 2 different formats can
* be fast cleared with a non 0 clear color.
*/
bool
isl_formats_have_same_bits_per_channel(enum isl_format format1,
enum isl_format format2)
{
const struct isl_format_layout *fmtl1 = isl_format_get_layout(format1);
const struct isl_format_layout *fmtl2 = isl_format_get_layout(format2);
return fmtl1->channels.r.bits == fmtl2->channels.r.bits &&
fmtl1->channels.g.bits == fmtl2->channels.g.bits &&
fmtl1->channels.b.bits == fmtl2->channels.b.bits &&
fmtl1->channels.a.bits == fmtl2->channels.a.bits;
}
/**
* Returns true if the two formats are "CCS_E compatible" meaning that you can
* render in one format with CCS_E enabled and then texture using the other
@ -976,16 +997,10 @@ isl_formats_are_ccs_e_compatible(const struct intel_device_info *devinfo,
if (format2 == ISL_FORMAT_A8_UNORM)
format2 = ISL_FORMAT_R8_UNORM;
const struct isl_format_layout *fmtl1 = isl_format_get_layout(format1);
const struct isl_format_layout *fmtl2 = isl_format_get_layout(format2);
/* The compression used by CCS is not dependent on the actual data encoding
* of the format but only depends on the bit-layout of the channels.
*/
return fmtl1->channels.r.bits == fmtl2->channels.r.bits &&
fmtl1->channels.g.bits == fmtl2->channels.g.bits &&
fmtl1->channels.b.bits == fmtl2->channels.b.bits &&
fmtl1->channels.a.bits == fmtl2->channels.a.bits;
return isl_formats_have_same_bits_per_channel(format1, format2);
}
static bool