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-rw-r--r--src/lib/gamma-quartz-cg.c353
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diff --git a/src/lib/gamma-quartz-cg.c b/src/lib/gamma-quartz-cg.c
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+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+#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 <CoreGraphics/CGDirectDisplay.h>
+# define close_fake_quartz_cg() /* For compatibility with "fake-quartz-cg.h". */
+#endif
+
+#include <stdlib.h>
+#include <errno.h>
+
+
+/**
+ * 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)
+{
+ this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE
+ | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH;
+ this->default_site_known = 1;
+ this->multiple_sites = 0;
+ this->multiple_partitions = 0;
+ this->multiple_crtcs = 1;
+ this->partitions_are_graphics_cards = 0;
+ this->site_restore = 1;
+ this->partition_restore = 1;
+ this->crtc_restore = 0;
+ this->identical_gamma_sizes = 1;
+ this->fixed_gamma_size = 0;
+ this->fixed_gamma_depth = 1;
+#ifdef FAKE_LIBGAMMA_METHOD_QUARTZ_CORE_GRAPHICS
+ this->fake = 1;
+# ifdef HAVE_LIBGAMMA_METHOD_X_RANDR
+ this->real = 1;
+# else
+ this->real = 0;
+# endif
+#else
+ this->fake = 0;
+ this->real = 1;
+#endif
+}
+
+
+/**
+ * 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. One 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)
+{
+ if (site != NULL)
+ return LIBGAMMA_NO_SUCH_SITE;
+
+ this->partitions_available = 1;
+ return 0;
+}
+
+
+/**
+ * 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)
+{
+ uint32_t cap = 4, n;
+ CGDirectDisplayID* crtcs;
+ CGDirectDisplayID* crtcs_old;
+ CGError r;
+
+ (void) site;
+
+ this->data = NULL;
+
+ if (partition != 0)
+ return LIBGAMMA_NO_SUCH_PARTITION;
+
+ crtcs = malloc((size_t)cap * sizeof(CGDirectDisplayID));
+ if (crtcs == NULL)
+ return LIBGAMMA_ERRNO_SET;
+
+ for (;;)
+ {
+ r = CGGetOnlineDisplayList(cap, crtcs, &n);
+ if (r != kCGErrorSuccess)
+ {
+ free(crtcs);
+ return LIBGAMMA_LIST_CRTCS_FAILED;
+ }
+ if (n < cap)
+ break;
+ if (cap == 0) /* We could also test ~0, but it is still too many. */
+ {
+ free(crtcs);
+ return LIBGAMMA_IMPOSSIBLE_AMOUNT;
+ }
+ crtcs_old = crtcs;
+ crtcs = realloc(crtcs, (size_t)cap * sizeof(CGDirectDisplayID));
+ if (crtcs)
+ {
+ free(crtcs_old);
+ return LIBGAMMA_ERRNO_SET;
+ }
+ }
+
+ 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;
+ if (crtc >= partition->crtcs_available)
+ return LIBGAMMA_NO_SUCH_CRTC;
+ return 0;
+}
+
+
+/**
+ * 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;
+ return errno = ENOTSUP, 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)
+
+ 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);
+ if ((fields & LIBGAMMA_CRTC_INFO_GAMMA_SIZE))
+ {
+ CGDirectDisplayID* crtcs = crtc->partition->data;
+ CGDirectDisplayID crtc_id = crtcs[crtc->crtc];
+ size_t gamma_size = CGDisplayGammaTableCapacity(crtc_id);;
+ this->red_gamma_size = (size_t)gamma_size;
+ this->green_gamma_size = this->red_gamma_size;
+ this->blue_gamma_size = this->red_gamma_size;
+ this->gamma_size_error = gamma_size < 2 ? LIBGAMMA_SINGLETON_GAMMA_RAMP : 0;
+ }
+ else
+ this->gamma_size_error = 0;
+ this->gamma_depth = -1;
+ this->gamma_depth_error = 0;
+ this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT);
+ 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);
+
+#undef _E
+
+ return this->gamma_size_error ? -1 : (fields & ~SUPPORTED_FIELDS) ? -1 : 0;
+
+#undef SUPPORTED_FIELDS
+}
+
+
+/**
+ * Get current the 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
+ if ((ramps->red_size != ramps->green_size) ||
+ (ramps->red_size != ramps->blue_size))
+ return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
+#endif
+ 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;
+ 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
+ if ((ramps.red_size != ramps.green_size) ||
+ (ramps.red_size != ramps.blue_size))
+ return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
+#endif
+ r = CGSetDisplayTransferByTable(crtc_id, (uint32_t)(ramps.red_size),
+ ramps.red, ramps.green, ramps.blue);
+ return r == kCGErrorSuccess ? 0 : LIBGAMMA_GAMMA_RAMP_WRITE_FAILED;
+}
+