diff options
Diffstat (limited to 'libgamma_linux_drm_crtc_get_gamma_ramps16.c')
| -rw-r--r-- | libgamma_linux_drm_crtc_get_gamma_ramps16.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/libgamma_linux_drm_crtc_get_gamma_ramps16.c b/libgamma_linux_drm_crtc_get_gamma_ramps16.c new file mode 100644 index 0000000..889b934 --- /dev/null +++ b/libgamma_linux_drm_crtc_get_gamma_ramps16.c @@ -0,0 +1,27 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +/** + * Get the current gamma ramps for a CRTC, 16-bit gamma-depth version + * + * @param this The CRTC state + * @param ramps The gamma ramps to fill with the current values + * @return Zero on success, otherwise (negative) the value of an + * error identifier provided by this library + */ +int +libgamma_linux_drm_crtc_get_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_t *restrict ramps) +{ + libgamma_drm_card_data_t *restrict card = this->partition->data; + int r; +#ifdef DEBUG + /* Gamma ramp sizes are identical but not fixed */ + if (ramps->red_size != ramps->green_size || ramps->red_size != ramps->blue_size) + return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE; +#endif + /* Read current gamma ramps */ + r = drmModeCrtcGetGamma(card->fd, (uint32_t)(size_t)this->data, (uint32_t)ramps->red_size, + ramps->red, ramps->green, ramps->blue); + return r ? LIBGAMMA_GAMMA_RAMP_READ_FAILED : 0; +} |