When working with framebuffer modifiers, it can be useful to extract the vendor identifier or check a modifier against a given vendor identifier. Add one macro that extracts the vendor identifier and a helper to check a modifier against a given vendor identifier.
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| @@ -373,6 +373,12 @@ extern "C" { · 372 unmodified lines | ||
| 373 | 373 | |
| 374 | 374 | #define DRM_FORMAT_RESERVED ((1ULL << 56) - 1) |
| 375 | 375 | |
| 376 | +#define fourcc_mod_get_vendor(modifier) \ | |
| 377 | + (((modifier) >> 56) & 0xff) | |
| 378 | + | |
| 379 | +#define fourcc_mod_is_vendor(modifier, vendor) \ | |
| 380 | + (fourcc_mod_get_vendor(modifier) == DRM_FORMAT_MOD_VENDOR_## vendor) | |
| 381 | + | |
| 376 | 382 | #define fourcc_mod_code(vendor, val) \ |
| 377 | 383 | ((((__u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | ((val) & 0x00ffffffffffffffULL)) |
| 378 | 384 | |