From 6142e3c07c051371de27a1b41f6986e03ad30c0d Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Wed, 1 Feb 2017 11:41:51 -0800 Subject: intel/isl: Add a format_supports_ccs_d helper MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Nothing uses this yet but it serves as a nice bit of documentation that's relatively easy to find. Reviewed-by: Samuel Iglesias Gonsálvez Reviewed-by: Chad Versace Reviewed-by: Anuj Phogat --- src/intel/isl/isl.h | 2 ++ src/intel/isl/isl_format.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/src/intel/isl/isl.h b/src/intel/isl/isl.h index bdc5ebf5c12..47e4a1eb4ee 100644 --- a/src/intel/isl/isl.h +++ b/src/intel/isl/isl.h @@ -1040,6 +1040,8 @@ bool isl_format_supports_filtering(const struct gen_device_info *devinfo, enum isl_format format); bool isl_format_supports_vertex_fetch(const struct gen_device_info *devinfo, enum isl_format format); +bool isl_format_supports_ccs_d(const struct gen_device_info *devinfo, + enum isl_format format); bool isl_format_supports_ccs_e(const struct gen_device_info *devinfo, enum isl_format format); bool isl_format_supports_multisampling(const struct gen_device_info *devinfo, diff --git a/src/intel/isl/isl_format.c b/src/intel/isl/isl_format.c index ebc8ec9e708..ed5a0636eb4 100644 --- a/src/intel/isl/isl_format.c +++ b/src/intel/isl/isl_format.c @@ -437,6 +437,28 @@ isl_format_supports_vertex_fetch(const struct gen_device_info *devinfo, return format_gen(devinfo) >= format_info[format].input_vb; } +/** + * Returns true if the given format can support single-sample fast clears. + * This function only checks the format. In order to determine if a surface + * supports CCS_E, several other factors need to be considered such as tiling + * and sample count. See isl_surf_get_ccs_surf for details. + */ +bool +isl_format_supports_ccs_d(const struct gen_device_info *devinfo, + enum isl_format format) +{ + /* Fast clears were first added on Ivy Bridge */ + if (devinfo->gen < 7) + return false; + + if (!isl_format_supports_rendering(devinfo, format)) + return false; + + const struct isl_format_layout *fmtl = isl_format_get_layout(format); + + return fmtl->bpb == 32 || fmtl->bpb == 64 || fmtl->bpb == 128; +} + bool isl_format_supports_ccs_e(const struct gen_device_info *devinfo, enum isl_format format) -- cgit v1.2.3