diff options
Diffstat (limited to 'src/gamma-linux-drm.c')
| -rw-r--r-- | src/gamma-linux-drm.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/src/gamma-linux-drm.c b/src/gamma-linux-drm.c index e5e3482..57127bf 100644 --- a/src/gamma-linux-drm.c +++ b/src/gamma-linux-drm.c @@ -400,9 +400,7 @@ int libgamma_linux_drm_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this #endif r = drmModeCrtcGetGamma(card->fd, (uint32_t)(this->crtc), (uint32_t)(ramps->red_size), ramps->red, ramps->green, ramps->blue); - if (r < 0) - return LIBGAMMA_GAMMA_RAMP_READ_FAILED; - return 0; + return r ? LIBGAMMA_GAMMA_RAMP_READ_FAILED : 0; } @@ -417,5 +415,40 @@ int libgamma_linux_drm_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this int libgamma_linux_drm_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this, libgamma_gamma_ramps_t ramps) { + libgamma_drm_card_data_t* card = this->partition->data; + int r; +#ifdef DEBUG + if ((ramps.red_size != ramps.green_size) || + (ramps.red_size != ramps.blue_size)) + return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE; +#endif + r = drmModeCrtcSetGamma(card->fd, (uint32_t)(size_t)(this->data), + (uint32_t)(ramps.red_size), ramps.red, ramps.green, ramps.blue); + if (r) + switch (errno) + { + case EACCES: + case EAGAIN: + case EIO: + /* Permission denied errors must be ignored, because we do not + * have permission to do this while a display server is active. + * We are also checking for some other error codes just in case. */ + case EBUSY: + case EINPROGRESS: + /* It is hard to find documentation for DRM (in fact all of this is + * just based on the functions names and some testing,) perhaps we + * could get this if we are updating to fast. */ + break; + case EBADF: + case ENODEV: + case ENXIO: + /* XXX: I have not actually tested removing my graphics card or, + * monitor but I imagine either of these is what would happen. */ + return LIBGAMMA_GRAPHICS_CARD_REMOVED; + + default: + return LIBGAMMA_ERRNO_SET; + } + return 0; } |