diff options
Diffstat (limited to '')
| -rw-r--r-- | libgamma_dummy_get_crtc_information.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/libgamma_dummy_get_crtc_information.c b/libgamma_dummy_get_crtc_information.c new file mode 100644 index 0000000..188afc9 --- /dev/null +++ b/libgamma_dummy_get_crtc_information.c @@ -0,0 +1,69 @@ +/* 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_dummy_get_crtc_information(libgamma_crtc_information_t *restrict this, + libgamma_crtc_state_t *restrict crtc, int32_t fields) +{ + libgamma_dummy_crtc_t *restrict data = crtc->data; + int supported = libgamma_dummy_internal_configurations.capabilities.crtc_information; + int e = 0; + size_t n; + + /* Copy over information */ + *this = data->info; + + /* Duplicate strings */ + if (this->edid) { + this->edid = malloc(this->edid_length * sizeof(char)); + if (!this->edid) + this->edid_error = errno; + memcpy(this->edid, data->info.edid, this->edid_length * sizeof(char)); + } + if (this->connector_name) { + n = strlen(this->connector_name); + this->connector_name = malloc((n + 1) * sizeof(char)); + if (!this->connector_name) + this->connector_name_error = errno; + memcpy(this->connector_name, data->info.connector_name, (n + 1) * sizeof(char)); + } + + /* Parse EDID */ + if (this->edid_error) + this->width_mm_edid_error = this->height_mm_edid_error = this->gamma_error = this->edid_error; + else if (fields & (LIBGAMMA_CRTC_INFO_MACRO_EDID ^ LIBGAMMA_CRTC_INFO_EDID)) + e |= libgamma_internal_parse_edid(this, fields); + + /* Test errors */ +#define _E(FIELD, VAR)\ + ((fields & FIELD) ? ((supported & FIELD) ? VAR : (VAR = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED)) : 0) + e |= _E(LIBGAMMA_CRTC_INFO_EDID, this->edid_error); + e |= _E(LIBGAMMA_CRTC_INFO_WIDTH_MM, this->width_mm_error); + e |= _E(LIBGAMMA_CRTC_INFO_HEIGHT_MM, this->height_mm_error); + e |= _E(LIBGAMMA_CRTC_INFO_GAMMA_SIZE, this->gamma_size_error); + e |= _E(LIBGAMMA_CRTC_INFO_GAMMA_DEPTH, this->gamma_depth_error); + e |= _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT, this->gamma_support_error); + e |= _E(LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER, this->subpixel_order_error); + e |= _E(LIBGAMMA_CRTC_INFO_ACTIVE, this->active_error); + e |= _E(LIBGAMMA_CRTC_INFO_CONNECTOR_NAME, this->connector_name_error); + e |= _E(LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE, this->connector_type_error); + + if ((fields & LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID) && !(supported & LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID)) + e |= this->width_mm_edid_error = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED; + if ((fields & LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID) && !(supported & LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID)) + e |= this->height_mm_edid_error = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED; + if ((fields & LIBGAMMA_CRTC_INFO_GAMMA) && !(supported & LIBGAMMA_CRTC_INFO_GAMMA)) + e |= this->gamma_error = LIBGAMMA_CRTC_INFO_NOT_SUPPORTED; +#undef _E + + return e ? -1 : 0; +} |