/* See LICENSE file for copyright and license details. */ #ifndef HAVE_LIBGAMMA_METHOD_QUARTZ_CORE_GRAPHICS # error Compiling gamma-quartz-cg.c without HAVE_LIBGAMMA_METHOD_QUARTZ_CORE_GRAPHICS #endif #include "gamma-quartz-cg.h" #include "libgamma-error.h" #ifdef FAKE_LIBGAMMA_METHOD_QUARTZ_CORE_GRAPHICS # include "fake-quartz-cg.h" #else # include # include # define close_fake_quartz_cg() /* For compatibility with "fake-quartz-cg.h" */ #endif #include #include /** * Return the capabilities of the adjustment method * * @param this The data structure to fill with the method's capabilities */ void libgamma_quartz_cg_method_capabilities(libgamma_method_capabilities_t* restrict this) { /* Gamma ramps size and depth can be queried */ this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH; /* Quartz/CoreGraphics does not support sites or partitions */ this->default_site_known = 1; this->multiple_sites = 0; this->multiple_partitions = 0; /* Quartz/CoreGraphics does support CRTC:s */ this->multiple_crtcs = 1; /* Partitions are not supported... */ this->partitions_are_graphics_cards = 0; /* CoreGraphics have support for system restore */ this->site_restore = 1; this->partition_restore = 1; /* But not for individual CRTC:s */ this->crtc_restore = 0; /* Gamma ramp sizes are identifical but not fixed */ this->identical_gamma_sizes = 1; this->fixed_gamma_size = 0; /* Gamma ramp depths are fixed */ this->fixed_gamma_depth = 1; /* Quartz/CoreGraphics is a real adjustment method that can be faked */ #ifdef FAKE_LIBGAMMA_METHOD_QUARTZ_CORE_GRAPHICS /* It is considered real but fake if it is translated to X RandR */ this->fake = 1; # ifdef HAVE_LIBGAMMA_METHOD_X_RANDR this->real = 1; # else this->real = 0; # endif #else /* It is real and not fake if we are running on Mac OS X */ this->fake = 0; this->real = 1; #endif /* Gamma ramp adjustments are non-persistent */ this->auto_restore = 1; } /** * Initialise an allocated site state * * @param this The site state to initialise * @param site The site identifier, unless it is `NULL` it must a * `free`:able. Once the state is destroyed the library * will attempt to free it. There you should not free * it yourself, and it must not be a string constant * or allocate on the stack. Note however that it will * not be free:d if this function fails. * @return Zero on success, otherwise (negative) the value of an * error identifier provided by this library */ int libgamma_quartz_cg_site_initialise(libgamma_site_state_t *restrict this, char *restrict site) { this->partitions_available = 1; return site ? 0 : LIBGAMMA_NO_SUCH_SITE; } /** * Release all resources held by a site state * * @param this The site state */ void libgamma_quartz_cg_site_destroy(libgamma_site_state_t *restrict this) { (void) this; close_fake_quartz_cg(); } /** * Restore the gamma ramps all CRTC:s with a site to the system settings * * @param this The site state * @return Zero on success, otherwise (negative) the value of an * error identifier provided by this library */ int libgamma_quartz_cg_site_restore(libgamma_site_state_t *restrict this) { (void) this; CGDisplayRestoreColorSyncSettings(); return 0; } /** * Initialise an allocated partition state * * @param this The partition state to initialise * @param site The site state for the site that the partition belongs to * @param partition The the index of the partition within the site * @return Zero on success, otherwise (negative) the value of an * error identifier provided by this library */ int libgamma_quartz_cg_partition_initialise(libgamma_partition_state_t *restrict this, libgamma_site_state_t *restrict site, size_t partition) { CGDirectDisplayID *crtcs, *crtcs_old; uint32_t cap = 4, n; (void) site; this->data = NULL; if (partition) return LIBGAMMA_NO_SUCH_PARTITION; /* Allocate array of CRTC ID:s */ crtcs = malloc((size_t)cap * sizeof(CGDirectDisplayID)); if (!crtcs) return LIBGAMMA_ERRNO_SET; /* It is not possible to ask CoreGraphics how many CRTC:s are * available. We have to ask it to give us a ID:s of a number * of CRTC:s and ask for more if we got as many as we asked for. */ for (;;) { /* Ask for CRTC ID:s */ if (CGGetOnlineDisplayList(cap, crtcs, &n) != kCGErrorSuccess) return free(crtcs), LIBGAMMA_LIST_CRTCS_FAILED; /* If we did not get as many as we asked for then we have all */ if (n < cap) break; /* Increase the number CRTC ID:s to ask for */ if (cap > SIZE_MAX / 2) /* We could also test ~0, but it is still too many */ return free(crtcs), LIBGAMMA_IMPOSSIBLE_AMOUNT; cap <<= 1; /* Grow the array of CRTC ID:s so that it can fit all we are asking for */ crtcs = realloc(crtcs_old = crtcs, (size_t)cap * sizeof(CGDirectDisplayID)); if (!crtcs) { free(crtcs_old); return LIBGAMMA_ERRNO_SET; } } /* Store CRTC ID:s and CRTC count */ this->data = crtcs; this->crtcs_available = (size_t)n; return 0; } /** * Release all resources held by a partition state * * @param this The partition state */ void libgamma_quartz_cg_partition_destroy(libgamma_partition_state_t *restrict this) { free(this->data); } /** * Restore the gamma ramps all CRTC:s with a partition to the system settings * * @param this The partition state * @return Zero on success, otherwise (negative) the value of an * error identifier provided by this library */ int libgamma_quartz_cg_partition_restore(libgamma_partition_state_t *restrict this) { return libgamma_quartz_cg_site_restore(this->site); } /** * Initialise an allocated CRTC state * * @param this The CRTC state to initialise * @param partition The partition state for the partition that the CRTC belongs to * @param crtc The the index of the CRTC within the site * @return Zero on success, otherwise (negative) the value of an * error identifier provided by this library */ int libgamma_quartz_cg_crtc_initialise(libgamma_crtc_state_t *restrict this, libgamma_partition_state_t *restrict partition, size_t crtc) { (void) this; return crtc < partition->crtcs_available ? 0 : LIBGAMMA_NO_SUCH_CRTC; } /** * Release all resources held by a CRTC state * * @param this The CRTC state */ void libgamma_quartz_cg_crtc_destroy(libgamma_crtc_state_t *restrict this) { (void) this; } /** * Restore the gamma ramps for a CRTC to the system settings for that CRTC * * @param this The CRTC state * @return Zero on success, otherwise (negative) the value of an * error identifier provided by this library */ int libgamma_quartz_cg_crtc_restore(libgamma_crtc_state_t *restrict this) { (void) this; errno = ENOTSUP; return LIBGAMMA_ERRNO_SET; } /** * 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 } /** * Get the current gamma ramps for a CRTC, `float` 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_quartz_cg_crtc_get_gamma_rampsf(libgamma_crtc_state_t *restrict this, libgamma_gamma_rampsf_t *restrict ramps) { CGDirectDisplayID *restrict crtcs = this->partition->data; CGDirectDisplayID crtc_id = crtcs[this->crtc]; uint32_t gamma_size_out; CGError r; #ifdef DEBUG /* Gamma ramps 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 = CGGetDisplayTransferByTable(crtc_id, (uint32_t)ramps->red_size, ramps->red, ramps->green, ramps->blue, &gamma_size_out); if (r != kCGErrorSuccess) return LIBGAMMA_GAMMA_RAMP_READ_FAILED; /* I hope that it will not actually ever change, but it does return the the gamma ramp size despite that it can be queried without querying for more */ if (gamma_size_out != ramps->red_size) return LIBGAMMA_GAMMA_RAMP_SIZE_CHANGED; return 0; } /** * Set the gamma ramps for a CRTC, `float` version * * @param this The CRTC state * @param ramps The gamma ramps to apply * @return Zero on success, otherwise (negative) the value of an * error identifier provided by this library */ int libgamma_quartz_cg_crtc_set_gamma_rampsf(libgamma_crtc_state_t *restrict this, libgamma_gamma_rampsf_t ramps) { CGDirectDisplayID *restrict crtcs = this->partition->data; CGDirectDisplayID crtc_id = crtcs[this->crtc]; CGError r; #ifdef DEBUG /* Gamma ramps 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 /* Apply gamma ramps */ r = CGSetDisplayTransferByTable(crtc_id, (uint32_t)ramps.red_size, ramps.red, ramps.green, ramps.blue); return r == kCGErrorSuccess ? 0 : LIBGAMMA_GAMMA_RAMP_WRITE_FAILED; }