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Fix KMS cursor capture on Nvidia GPUs

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This commit is contained in:
Cameron Gutman 2024-01-27 23:43:19 -06:00
parent 8182f592e8
commit cf416f55e1
1 changed files with 14 additions and 0 deletions
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14
src/platform/linux/kmsgrab.cpp
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@ -979,6 +979,20 @@ namespace platf {
// We will map the entire region, but only copy what the source rectangle specifies
size_t mapped_size = ((size_t) fb->pitches[0]) * fb->height;
void *mapped_data = mmap(nullptr, mapped_size, PROT_READ, MAP_SHARED, plane_fd.el, fb->offsets[0]);
// If we got ENOSYS back, let's try to map it as a dumb buffer instead (required for Nvidia GPUs)
if (mapped_data == MAP_FAILED && errno == ENOSYS) {
drm_mode_map_dumb map = {};
map.handle = fb->handles[0];
if (drmIoctl(card.fd.el, DRM_IOCTL_MODE_MAP_DUMB, &map) < 0) {
BOOST_LOG(error) << "Failed to map cursor FB as dumb buffer: "sv << strerror(errno);
captured_cursor.visible = false;
return;
}
mapped_data = mmap(nullptr, mapped_size, PROT_READ, MAP_SHARED, card.fd.el, map.offset);
}
if (mapped_data == MAP_FAILED) {
BOOST_LOG(error) << "Failed to mmap cursor FB: "sv << strerror(errno);
captured_cursor.visible = false;