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-rw-r--r--src/gamma-quartz-cg.c353
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diff --git a/src/gamma-quartz-cg.c b/src/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;
-}
-