Find a file
Jan Beich 0095702303 build: ignore warnings in libdrm headers
In file included from ../log.c:4:
In file included from ../include/log.h:4:
In file included from ../include/libliftoff.h:8:
/usr/local/include/xf86drmMode.h:551:19: error: zero size arrays are an extension [-Werror,-Wzero-length-array]
        uint32_t lessees[0];
                         ^
/usr/local/include/xf86drmMode.h:558:19: error: zero size arrays are an extension [-Werror,-Wzero-length-array]
        uint32_t objects[0];
                         ^
2020-10-31 09:17:13 +01:00
example Replace liftoff_device_apply with liftoff_output_apply 2019-11-24 18:13:40 +01:00
include Add log verbosity helper 2020-03-08 13:05:30 +01:00
test build: ignore warnings in libdrm headers 2020-10-31 09:17:13 +01:00
.build.yml ci: add codecov 2019-10-14 18:04:59 +03:00
.editorconfig Initial experiments 2019-08-21 23:07:37 +03:00
.gitignore Add build-* to .gitignore 2019-10-19 13:46:11 +03:00
alloc.c Don't pick a plane for fully transparent layers 2020-05-26 21:29:59 +02:00
device.c Retry atomic commit on EINTR and EAGAIN 2020-01-13 12:28:39 +01:00
layer.c Log layer priority only on change 2020-03-08 13:03:05 +01:00
LICENSE Add LICENSE 2019-08-21 23:13:35 +03:00
list.c Rename library to liftoff 2019-09-12 11:40:21 +03:00
log.c Add log verbosity helper 2020-03-08 13:05:30 +01:00
meson.build build: ignore warnings in libdrm headers 2020-10-31 09:17:13 +01:00
output.c Print composition layer in logs 2020-04-09 18:25:37 +02:00
plane.c Add support for the rotation property 2020-05-26 11:35:50 +02:00
README.md readme: add link to FOSDEM 2020 talk 2020-03-25 16:23:59 +01:00

libliftoff

builds.sr.ht status

Lightweight hardware composer library for libdrm.

libliftoff eases the use of KMS planes from userspace without standing in your way. Users create "virtual planes" called layers, set KMS properties on them, and libliftoff will allocate planes for these layers if possible.

Resources:

Building

Depends on libdrm. Requires universal planes and atomic.

meson build/
ninja -C build/

Usage

See liftoff.h. Here's the general idea:

struct liftoff_device *device;
struct liftoff_output *output;
struct liftoff_layer *layer;
drmModeAtomicReq *req;
int ret;

device = liftoff_device_create(drm_fd);
output = liftoff_output_create(device, crtc_id);

layer = liftoff_layer_create(output);
liftoff_layer_set_property(layer, "FB_ID", fb_id);
/* Probably setup more properties and more layers */

req = drmModeAtomicAlloc();
if (!liftoff_output_apply(output, req)) {
	perror("liftoff_output_apply");
	exit(1);
}

ret = drmModeAtomicCommit(drm_fd, req, DRM_MODE_ATOMIC_NONBLOCK, NULL);
if (ret < 0) {
	perror("drmModeAtomicCommit");
	exit(1);
}
drmModeAtomicFree(req);

Contributing

Report bugs and send pull requests on GitHub.

We use the Wayland/Weston style and contribution guidelines, see Weston's contributing document.

License

MIT