diff options
Diffstat (limited to '')
-rw-r--r-- | libgamma_quartz_cg_get_crtc_information.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/libgamma_quartz_cg_get_crtc_information.c b/libgamma_quartz_cg_get_crtc_information.c new file mode 100644 index 0000000..da4937e --- /dev/null +++ b/libgamma_quartz_cg_get_crtc_information.c @@ -0,0 +1,56 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + + +/** + * Read information about a CRTC + * + * @param this Instance of a data structure to fill with the information about the CRTC + * @param crtc The state of the CRTC whose information should be read + * @param fields OR:ed identifiers for the information about the CRTC that should be read. + * @return Zero on success, -1 on error. On error refer to the error reports in `this` + */ +int +libgamma_quartz_cg_get_crtc_information(libgamma_crtc_information_t *restrict this, + libgamma_crtc_state_t *restrict crtc, int32_t fields) +{ +#define SUPPORTED_FIELDS (LIBGAMMA_CRTC_INFO_GAMMA_SIZE | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH) +#define _E(FIELD) ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0) + + CGDirectDisplayID *restrict crtcs; + size_t gamma_size; + + /* Quartz/CoreGraphics does not support EDID or monitor dimensions */ + this->edid_error = _E(LIBGAMMA_CRTC_INFO_EDID); + this->width_mm_error = _E(LIBGAMMA_CRTC_INFO_WIDTH_MM); + this->height_mm_error = _E(LIBGAMMA_CRTC_INFO_HEIGHT_MM); + this->width_mm_edid_error = _E(LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID); + this->height_mm_edid_error = _E(LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID); + /* Quartz/CoreGraphics does support gamma ramp size query + The gamma ramps are identical but not fixed, and the query can fail */ + this->gamma_size_error = 0; + if ((fields & LIBGAMMA_CRTC_INFO_GAMMA_SIZE)) { + crtcs = crtc->partition->data; + gamma_size = CGDisplayGammaTableCapacity(crtcs[crtc->crtc]); + this->red_gamma_size = this->green_gamma_size = this->blue_gamma_size = (size_t)gamma_size; + this->gamma_size_error = gamma_size < 2 ? LIBGAMMA_SINGLETON_GAMMA_RAMP : 0; + } + /* Quartz/CoreGraphics uses `float` ramps */ + this->gamma_depth = -1; + this->gamma_depth_error = 0; + /* Quartz/CoreGraphics does not support gamma ramp support queries */ + this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT); + /* Quartz/CoreGraphics does not support EDID or connector information */ + this->subpixel_order_error = _E(LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER); + this->active_error = _E(LIBGAMMA_CRTC_INFO_ACTIVE); + this->connector_name_error = _E(LIBGAMMA_CRTC_INFO_CONNECTOR_NAME); + this->connector_type_error = _E(LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE); + this->gamma_error = _E(LIBGAMMA_CRTC_INFO_GAMMA); + + /* We failed if gamma ramp size query failed or if an unsupport field was queried */ + return (this->gamma_size_error || (fields & ~SUPPORTED_FIELDS)) ? -1 : 0; + +#undef _E +#undef SUPPORTED_FIELDS +} |