diff options
Diffstat (limited to 'src/intel/isl')
| -rw-r--r-- | src/intel/isl/isl.h | 4 | ||||
| -rw-r--r-- | src/intel/isl/isl_format.c | 31 |
2 files changed, 35 insertions, 0 deletions
diff --git a/src/intel/isl/isl.h b/src/intel/isl/isl.h index 47e4a1eb4ee..eff7218748e 100644 --- a/src/intel/isl/isl.h +++ b/src/intel/isl/isl.h @@ -1047,6 +1047,10 @@ bool isl_format_supports_ccs_e(const struct gen_device_info *devinfo, bool isl_format_supports_multisampling(const struct gen_device_info *devinfo, enum isl_format format); +bool isl_formats_are_ccs_e_compatible(const struct gen_device_info *devinfo, + 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; diff --git a/src/intel/isl/isl_format.c b/src/intel/isl/isl_format.c index ed5a0636eb4..ef6c98d50b3 100644 --- a/src/intel/isl/isl_format.c +++ b/src/intel/isl/isl_format.c @@ -504,6 +504,37 @@ isl_format_supports_multisampling(const struct gen_device_info *devinfo, } } +/** + * 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 + * format without needing a resolve. + * + * Note: Even if the formats are compatible, special care must be taken if a + * clear color is involved because the encoding of the clear color is heavily + * format-dependent. + */ +bool +isl_formats_are_ccs_e_compatible(const struct gen_device_info *devinfo, + enum isl_format format1, + enum isl_format format2) +{ + /* They must support CCS_E */ + if (!isl_format_supports_ccs_e(devinfo, format1) || + !isl_format_supports_ccs_e(devinfo, format2)) + return false; + + 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; +} + static inline bool isl_format_has_channel_type(enum isl_format fmt, enum isl_base_type type) { |