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authorMattias Andrée <maandree@operamail.com>2014-08-28 16:36:49 +0200
committerMattias Andrée <maandree@operamail.com>2014-08-28 16:36:49 +0200
commit6c418015505f29f7c59f86b472b7535f5d87fc84 (patch)
tree1daa0c3114fe41c1f4d865f639ffa5034ebb8194 /src/lib/gamma-dummy.c.gpp
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dummy method: set and get gamma ramps
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src/lib/gamma-dummy.c.gpp')
-rw-r--r--src/lib/gamma-dummy.c.gpp1017
1 files changed, 1017 insertions, 0 deletions
diff --git a/src/lib/gamma-dummy.c.gpp b/src/lib/gamma-dummy.c.gpp
new file mode 100644
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--- /dev/null
+++ b/src/lib/gamma-dummy.c.gpp
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+/* -*- c -*- */
+/**
+ * libgamma -- Display server abstraction layer for gamma ramp adjustments
+ * Copyright (C) 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_DUMMY
+# error Compiling gamma-dummy.c without HAVE_LIBGAMMA_METHOD_DUMMY
+#endif
+
+#include "gamma-dummy.h"
+
+#include "libgamma-error.h"
+#include "libgamma-method.h"
+#include "libgamma-facade.h"
+#include "edid.h"
+#include "gamma-helper.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+
+/**
+ * Configuration set for the dummy adjustment method.
+ */
+typedef struct libgamma_dummy_configurations
+{
+ /**
+ * The method's capabilities.
+ *
+ * Some fields are ignored:
+ * - real
+ * - fake
+ */
+ libgamma_method_capabilities_t capabilities;
+
+ /**
+ * Template for CRTC:s information.
+ *
+ * Some fields are ignored:
+ * - width_mm_edid
+ * - width_mm_edid_error
+ * - height_mm_edid
+ * - height_mm_edid_error
+ * - gamma_red
+ * - gamma_green
+ * - gamma_blue
+ * - gamma_error
+ */
+ libgamma_crtc_information_t crtc_info_template;
+
+ /**
+ * The adjustment method to use.
+ */
+ int real_method;
+
+ /**
+ * The number of sites on the system.
+ */
+ size_t site_count;
+
+ /**
+ * The number of paritions on a site before it has been configured.
+ */
+ size_t default_partition_count;
+
+ /**
+ * The number of CRTC:s on a paritions before it has been configured.
+ */
+ size_t default_crtc_count;
+
+ /**
+ * Whether the sites should be inherited from the real method.
+ */
+ unsigned inherit_sites : 1;
+
+ /**
+ * Whether the partitions should be inherited from the real method.
+ */
+ unsigned inherit_partition_count : 1;
+
+ /**
+ * Whether the CRTC:s should be inherited from the real method.
+ */
+ unsigned inherit_crtc_count : 1;
+
+ /**
+ * When a site has been created, stall until the partition count has
+ * been configured.
+ */
+ unsigned stall_for_partition_count : 1;
+
+ /**
+ * When a parition has been created, stall until the CRTC count has
+ * been configured.
+ */
+ unsigned stall_for_crtc_count : 1;
+
+ /**
+ * Methods should stall until the system has been configured
+ * unless $LIBGAMMA_DUMMY_STALL is not true.
+ */
+ unsigned stalled_start : 1;
+
+ /**
+ * Whether to print what is going on in the phony system.
+ */
+ unsigned verbose : 1;
+
+} libgamma_dummy_configurations_t;
+
+
+/**
+ * Dummy adjustment method internal data for a CRTC.
+ */
+typedef struct libgamma_dummy_crtc
+{
+ /**
+ * The gamma ramp for the red channel.
+ */
+ void* restrict gamma_red;
+
+ /**
+ * The gamma ramp for the green channel.
+ */
+ void* restrict gamma_green;
+
+ /**
+ * The gamma ramp for the blue channel.
+ */
+ void* restrict gamma_blue;
+
+ /**
+ * Information about the CRTC and monitor.
+ *
+ * Some fields are ignored:
+ * - width_mm_edid
+ * - width_mm_edid_error
+ * - height_mm_edid
+ * - height_mm_edid_error
+ * - gamma_red
+ * - gamma_green
+ * - gamma_blue
+ * - gamma_error
+ */
+ libgamma_crtc_information_t info;
+
+ /**
+ * Partition state that contains this information.
+ */
+ libgamma_crtc_state_t* state;
+
+} libgamma_dummy_crtc_t;
+
+
+/**
+ * Dummy adjustment method internal data for a partition.
+ */
+typedef struct libgamma_dummy_partition
+{
+ /**
+ * The CRTC:s on the system.
+ */
+ libgamma_dummy_crtc_t* crtcs;
+
+ /**
+ * The number of CRTC:s on the system.
+ */
+ size_t crtc_count;
+
+ /**
+ * Partition state that contains this information.
+ */
+ libgamma_partition_state_t* state;
+
+} libgamma_dummy_partition_t;
+
+
+/**
+ * Dummy adjustment method internal data for a site.
+ */
+typedef struct libgamma_dummy_site
+{
+ /**
+ * The partitions on the system.
+ */
+ libgamma_dummy_partition_t* partitions;
+
+ /**
+ * The number of partitions on the system.
+ */
+ size_t partition_count;
+
+ /**
+ * Site state that contains this information.
+ */
+ libgamma_site_state_t* state;
+
+} libgamma_dummy_site_t;
+
+
+
+/**
+ * Restore the gamma ramps for a CRTC to the system settings for that CRTC
+ * and ignore the method's capabilities.
+ *
+ * @param this The CRTC data
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+static int libgamma_dummy_crtc_restore_forced(libgamma_dummy_crtc_t* restrict data);
+
+
+
+/**
+ * Configurations for the dummy adjustment method.
+ */
+static libgamma_dummy_configurations_t libgamma_dummy_configurations =
+ {
+ .capabilities =
+ {
+ .crtc_information = (1 << LIBGAMMA_CRTC_INFO_COUNT) - 1,
+ .default_site_known = 1,
+ .multiple_sites = 1,
+ .multiple_partitions = 1,
+ .multiple_crtcs = 1,
+ .partitions_are_graphics_cards = 1,
+ .site_restore = 1,
+ .partition_restore = 1,
+ .crtc_restore = 1,
+ .identical_gamma_sizes = 0,
+ .fixed_gamma_size = 0,
+ .fixed_gamma_depth = 0
+ },
+ .crtc_info_template =
+ {
+ .edid = NULL,
+ .edid_length = 0,
+ .edid_error = LIBGAMMA_EDID_NOT_FOUND,
+ .width_mm = 400,
+ .width_mm_error = 0,
+ .height_mm = 300,
+ .height_mm_error = 0,
+ .red_gamma_size = 1024,
+ .green_gamma_size = 2048,
+ .blue_gamma_size = 512,
+ .gamma_size_error = 0,
+ .gamma_depth = 64,
+ .gamma_depth_error = 0,
+ .gamma_support = 1,
+ .gamma_support_error = 0,
+ .subpixel_order = LIBGAMMA_SUBPIXEL_ORDER_HORIZONTAL_RGB,
+ .subpixel_order_error = 0,
+ .active = 1,
+ .active_error = 0,
+ .connector_name = NULL,
+ .connector_name_error = LIBGAMMA_CONNECTOR_TYPE_NOT_RECOGNISED,
+ .connector_type = LIBGAMMA_CONNECTOR_TYPE_Unknown,
+ .connector_type_error = 0
+ },
+ .real_method = LIBGAMMA_METHOD_DUMMY,
+ .site_count = 2,
+ .default_partition_count = 2,
+ .default_crtc_count = 2,
+ .inherit_sites = 1,
+ .inherit_partition_count = 1,
+ .inherit_crtc_count = 1,
+ .stall_for_partition_count = 0,
+ .stall_for_crtc_count = 0,
+ .stalled_start = 1,
+ .verbose = 0
+ };
+
+
+
+/**
+ * Return the capabilities of the adjustment method.
+ *
+ * @param this The data structure to fill with the method's capabilities.
+ */
+void libgamma_dummy_method_capabilities(libgamma_method_capabilities_t* restrict this)
+{
+ *this = libgamma_dummy_configurations.capabilities;
+ this->real = libgamma_dummy_configurations.real_method != LIBGAMMA_METHOD_DUMMY;
+ this->fake = this->real;
+}
+
+
+/**
+ * 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_dummy_site_initialise(libgamma_site_state_t* restrict this,
+ char* restrict site)
+{
+ libgamma_dummy_site_t* data = NULL;
+ size_t i, sites, crtcs;
+
+ sites = libgamma_dummy_configurations.site_count;
+ if (libgamma_dummy_configurations.capabilities.multiple_sites == 0)
+ sites = sites == 0 ? 0 : 1;
+ this->data = NULL;
+
+ if ((site != NULL) && (*site) && ((atoll(site) < 0) || (sites <= (unsigned long long)atoll(site))))
+ return LIBGAMMA_NO_SUCH_SITE;
+
+ data = malloc(sizeof(libgamma_dummy_site_t));
+ if (data == NULL)
+ goto fail;
+
+ this->data = data;
+ data->state = this;
+
+ data->partition_count = libgamma_dummy_configurations.default_partition_count;
+ if (libgamma_dummy_configurations.capabilities.multiple_partitions == 0)
+ data->partition_count = data->partition_count == 0 ? 0 : 1;
+
+ crtcs = libgamma_dummy_configurations.default_crtc_count;
+ if (libgamma_dummy_configurations.capabilities.multiple_crtcs == 0)
+ crtcs = crtcs == 0 ? 0 : 1;
+
+ data->partitions = malloc(data->partition_count * sizeof(libgamma_dummy_partition_t));
+ if (data->partitions == NULL)
+ goto fail;
+
+ for (i = 0; i < data->partition_count; i++)
+ data->partitions[i].crtc_count = crtcs;
+
+ return 0;
+
+ fail:
+ free(data);
+ this->data = NULL;
+ return LIBGAMMA_ERRNO_SET;
+}
+
+
+/**
+ * Release all resources held by a site state.
+ *
+ * @param this The site state.
+ */
+void libgamma_dummy_site_destroy(libgamma_site_state_t* restrict this)
+{
+ libgamma_dummy_site_t* data = this->data;
+ if (data == NULL)
+ return;
+
+ free(data->partitions);
+ free(data);
+}
+
+
+/**
+ * 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_dummy_site_restore(libgamma_site_state_t* restrict this)
+{
+ libgamma_dummy_site_t* data = this->data;
+ size_t i, j;
+
+ if (libgamma_dummy_configurations.capabilities.site_restore == 0)
+ return errno = ENOTSUP, LIBGAMMA_ERRNO_SET;
+
+ for (j = 0; j < data->partition_count; j++)
+ for (i = 0; i < data->partitions[j].crtc_count; i++)
+ if (libgamma_dummy_crtc_restore_forced(data->partitions[j].crtcs + i) < 0)
+ return -1;
+
+ 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_dummy_partition_initialise(libgamma_partition_state_t* restrict this,
+ libgamma_site_state_t* restrict site, size_t partition)
+{
+ libgamma_crtc_information_t template = libgamma_dummy_configurations.crtc_info_template;
+ libgamma_dummy_site_t* site_data = site->data;
+ libgamma_dummy_partition_t* data = site_data->partitions + partition;
+ libgamma_dummy_crtc_t* crtc_data;
+ size_t i;
+
+ this->data = NULL;
+
+ if (partition >= site_data->partition_count)
+ return LIBGAMMA_NO_SUCH_PARTITION;
+
+ this->data = data;
+ data->state = this;
+
+ data->crtcs = calloc(data->crtc_count, sizeof(libgamma_dummy_crtc_t));
+ if (data->crtcs == NULL)
+ goto fail;
+ for (i = 0; i < data->crtc_count; i++)
+ {
+ crtc_data = data->crtcs + i;
+ crtc_data->info = template;
+
+ /* Duplicate strings. */
+ if (crtc_data->info.edid != NULL)
+ {
+ crtc_data->info.edid = malloc(crtc_data->info.edid_length * sizeof(char));
+ if (crtc_data->info.edid == NULL)
+ goto fail;
+ memcpy(crtc_data->info.edid, template.edid, crtc_data->info.edid_length * sizeof(char));
+ }
+ if (crtc_data->info.connector_name != NULL)
+ {
+ size_t n = strlen(crtc_data->info.connector_name);
+ crtc_data->info.connector_name = malloc((n + 1) * sizeof(char));
+ if (crtc_data->info.connector_name == NULL)
+ goto fail;
+ memcpy(crtc_data->info.connector_name, template.connector_name, (n + 1) * sizeof(char));
+ }
+ }
+
+ return 0;
+
+ fail:
+ for (i = 0; i < data->crtc_count; i++)
+ {
+ free(data->crtcs[i].info.edid);
+ free(data->crtcs[i].info.connector_name);
+ }
+ free(data->crtcs);
+ data->crtcs = NULL;
+ return LIBGAMMA_ERRNO_SET;
+}
+
+
+/**
+ * Release all resources held by a partition state.
+ *
+ * @param this The partition state.
+ */
+void libgamma_dummy_partition_destroy(libgamma_partition_state_t* restrict this)
+{
+ libgamma_dummy_partition_t* data = this->data;
+ size_t i;
+
+ if (data == NULL)
+ return;
+
+ for (i = 0; i < data->crtc_count; i++)
+ {
+ free(data->crtcs[i].info.edid);
+ free(data->crtcs[i].info.connector_name);
+ }
+ free(data->crtcs);
+ data->crtcs = NULL;
+}
+
+
+/**
+ * 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_dummy_partition_restore(libgamma_partition_state_t* restrict this)
+{
+ libgamma_dummy_partition_t* data = this->data;
+ size_t i;
+
+ if (libgamma_dummy_configurations.capabilities.partition_restore == 0)
+ return errno = ENOTSUP, LIBGAMMA_ERRNO_SET;
+
+ for (i = 0; i < data->crtc_count; i++)
+ if (libgamma_dummy_crtc_restore_forced(data->crtcs + i) < 0)
+ return -1;
+
+ return 0;
+}
+
+
+
+/**
+ * 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_dummy_crtc_initialise(libgamma_crtc_state_t* restrict this,
+ libgamma_partition_state_t* restrict partition, size_t crtc)
+{
+ libgamma_dummy_partition_t* partition_data = partition->data;
+ libgamma_dummy_crtc_t* data = partition_data->crtcs + crtc;
+ size_t stop_size;
+
+ this->data = NULL;
+
+ if (crtc >= partition_data->crtc_count)
+ return LIBGAMMA_NO_SUCH_CRTC;
+
+ this->data = data;
+ data->state = this;
+
+ if (data->info.gamma_depth == -1)
+ stop_size = sizeof(float);
+ else if (data->info.gamma_depth == -2)
+ stop_size = sizeof(double);
+ else
+ stop_size = (size_t)(data->info.gamma_depth) / 8;
+
+ if ((data->gamma_red = malloc(data->info.red_gamma_size * stop_size)) == NULL)
+ goto fail;
+ if ((data->gamma_green = malloc(data->info.green_gamma_size * stop_size)) == NULL)
+ goto fail;
+ if ((data->gamma_blue = malloc(data->info.blue_gamma_size * stop_size)) == NULL)
+ goto fail;
+
+ return libgamma_dummy_crtc_restore_forced(data);
+
+ fail:
+ free(data->gamma_red), data->gamma_red = NULL;
+ free(data->gamma_green), data->gamma_green = NULL;
+ free(data->gamma_blue), data->gamma_blue = NULL;
+ return LIBGAMMA_ERRNO_SET;
+}
+
+
+/**
+ * Release all resources held by a CRTC state.
+ *
+ * @param this The CRTC state.
+ */
+void libgamma_dummy_crtc_destroy(libgamma_crtc_state_t* restrict this)
+{
+ libgamma_dummy_crtc_t* data = this->data;
+ if (data == NULL)
+ return;
+
+ free(data->gamma_red), data->gamma_red = NULL;
+ free(data->gamma_green), data->gamma_green = NULL;
+ free(data->gamma_blue), data->gamma_blue = NULL;
+}
+
+
+/**
+ * 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_dummy_crtc_restore(libgamma_crtc_state_t* restrict this)
+{
+ if (libgamma_dummy_configurations.capabilities.crtc_restore == 0)
+ return errno = ENOTSUP, LIBGAMMA_ERRNO_SET;
+
+ return libgamma_dummy_crtc_restore_forced(this->data);
+}
+
+
+/**
+ * Restore the gamma ramps for a CRTC to the system settings for that CRTC
+ * and ignore the method's capabilities.
+ *
+ * @param this The CRTC data
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+static int libgamma_dummy_crtc_restore_forced(libgamma_dummy_crtc_t* restrict data)
+{
+ size_t rn = data->info.blue_gamma_size;
+ size_t gn = data->info.green_gamma_size;
+ size_t bn = data->info.blue_gamma_size;
+ size_t i;
+ if (data->gamma_red == NULL)
+ return 0;
+
+#define __reset_ramps(BITS) \
+ int ## BITS ## _t* red = data->gamma_red; \
+ int ## BITS ## _t* green = data->gamma_green; \
+ int ## BITS ## _t* blue = data->gamma_blue; \
+ double max = (double)INT ## BITS ## _MAX; \
+ for (i = 0; i < rn; i++) \
+ red[i] = (int ## BITS ## _t)(max * ((double)i / (double)(rn - 1))); \
+ for (i = 0; i < gn; i++) \
+ green[i] = (int ## BITS ## _t)(max * ((double)i / (double)(gn - 1))); \
+ for (i = 0; i < bn; i++) \
+ blue[i] = (int ## BITS ## _t)(max * ((double)i / (double)(bn - 1)))
+
+ if (data->info.gamma_depth == 8) { __reset_ramps(8); }
+ else if (data->info.gamma_depth == 16) { __reset_ramps(16); }
+ else if (data->info.gamma_depth == 32) { __reset_ramps(32); }
+ else if (data->info.gamma_depth == 64) { __reset_ramps(64); }
+ else if (data->info.gamma_depth == -1)
+ {
+ float* red = data->gamma_red;
+ float* green = data->gamma_green;
+ float* blue = data->gamma_blue;
+ for (i = 0; i < rn; i++)
+ red[i] = (float)((double)i / (double)(rn - 1));
+ for (i = 0; i < gn; i++)
+ green[i] = (float)((double)i / (double)(gn - 1));
+ for (i = 0; i < bn; i++)
+ blue[i] = (float)((double)i / (double)(bn - 1));
+ }
+ else
+ {
+ double* red = data->gamma_red;
+ double* green = data->gamma_green;
+ double* blue = data->gamma_blue;
+ for (i = 0; i < rn; i++)
+ red[i] = (double)i / (double)(rn - 1);
+ for (i = 0; i < gn; i++)
+ green[i] = (double)i / (double)(gn - 1);
+ for (i = 0; i < bn; i++)
+ blue[i] = (double)i / (double)(bn - 1);
+ }
+
+#undef __reset_ramps
+
+ return 0;
+}
+
+
+
+/**
+ * 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_configurations.capabilities.crtc_information;
+ int e = 0;
+
+ /* Copy over information. */
+ *this = data->info;
+
+ /* Duplicate strings. */
+ if (this->edid != NULL)
+ {
+ this->edid = malloc(this->edid_length * sizeof(char));
+ if (this->edid == NULL)
+ this->edid_error = errno;
+ memcpy(this->edid, data->info.edid, this->edid_length * sizeof(char));
+ }
+ if (this->connector_name != NULL)
+ {
+ size_t n = strlen(this->connector_name);
+ this->connector_name = malloc((n + 1) * sizeof(char));
+ if (this->connector_name == NULL)
+ this->connector_name_error = errno;
+ memcpy(this->connector_name, data->info.connector_name, (n + 1) * sizeof(char));
+ }
+
+ /* Parse EDID. */
+ if ((fields & (LIBGAMMA_CRTC_INFO_MACRO_EDID ^ LIBGAMMA_CRTC_INFO_EDID)))
+ e |= libgamma_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;
+}
+
+
+/**
+ * Get current the gamma ramps for a CRTC.
+ *
+ * @param 1 The data type for the ramp stop elements.
+ * @param 2 The `ramp*` pattern for the ramp structure and function to call.
+ * @param 3 Either of `bit8`, `bit16`, `bit32`, `bit64`, `float_single`, `float_double`;
+ * rather self-explanatory.
+ * @param 4 The number of bits in the gamma depth, -1 for single precision float,
+ * (`float`) and -2 for double percition float (`double`).
+ * @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.
+ */
+$>libgamma_dummy_crtc_get_gamma_ramps ()
+$>{
+int libgamma_dummy_crtc_get_gamma_${2}(libgamma_crtc_state_t* restrict this,
+ libgamma_gamma_${2}_t* restrict ramps)
+{
+ libgamma_dummy_crtc_t* data = this->data;
+ libgamma_gamma_ramps_any_t ramps_;
+ ${1}* r_ramp = data->gamma_red;
+ ${1}* g_ramp = data->gamma_green;
+ ${1}* b_ramp = data->gamma_blue;
+ size_t rn = data->info.red_gamma_size;
+ size_t gn = data->info.green_gamma_size;
+ size_t bn = data->info.blue_gamma_size;
+ size_t i;
+
+#ifdef DEBUG
+ /* Check gamma ramp sizes. */
+ if (libgamma_dummy_configurations.capabilities.identical_gamma_sizes)
+ if ((ramps->red_size != ramps->green_size) ||
+ (ramps->red_size != ramps->blue_size))
+ return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
+ if ((ramps->red_size != rn) ||
+ (ramps->green_size != gn) ||
+ (ramps->blue_size != bn))
+ return LIBGAMMA_WRONG_GAMMA_RAMP_SIZE;
+#endif
+
+ if (data->info.gamma_support == 0)
+ return LIBGAMMA_GAMMA_RAMP_READ_FAILED;
+
+#define __trans(DEPTH, SUFFIX) \
+ if (data->info.gamma_depth == DEPTH) \
+ return ramps_.${3} = *ramps, \
+ libgamma_translated_ramp_get(this, &ramps_, ${4}, DEPTH, libgamma_crtc_get_gamma_ramps ## SUFFIX)
+$>if [ ! ${4} = 8 ]; then
+ __trans(8, 8);
+$>fi
+$>if [ ! ${4} = 16 ]; then
+ __trans(16, 16);
+$>fi
+$>if [ ! ${4} = 32 ]; then
+ __trans(32, 32);
+$>fi
+$>if [ ! ${4} = 64 ]; then
+ __trans(64, 64);
+$>fi
+$>if [ ! ${4} = -1 ]; then
+ __trans(-1, f);
+$>fi
+$>if [ ! ${4} = -2 ]; then
+ __trans(-2, d);
+$>fi
+#undef __trans
+
+ for (i = 0; i < rn; i++) ramps->red[i] = r_ramp[i];
+ for (i = 0; i < gn; i++) ramps->green[i] = g_ramp[i];
+ for (i = 0; i < bn; i++) ramps->blue[i] = b_ramp[i];
+
+ return 0;
+}
+$>}
+
+
+/**
+ * Set the gamma ramps for a CRTC.
+ *
+ * @param 1 The data type for the ramp stop elements.
+ * @param 2 The `ramp*` pattern for the ramp structure and function to call.
+ * @param 3 Either of `bit8`, `bit16`, `bit32`, `bit64`, `float_single`, `float_double`;
+ * rather self-explanatory.
+ * @param 4 The number of bits in the gamma depth, -1 for single precision float,
+ * (`float`) and -2 for double percition float (`double`).
+ * @param this The CRTC state.
+ * @param ramps The gamma ramps to apply.
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+$>libgamma_dummy_crtc_set_gamma_ramps ()
+$>{
+int libgamma_dummy_crtc_set_gamma_${2}(libgamma_crtc_state_t* restrict this,
+ libgamma_gamma_${2}_t ramps)
+{
+ libgamma_dummy_crtc_t* data = this->data;
+ libgamma_gamma_ramps_any_t ramps_;
+ ${1}* r_ramp = data->gamma_red;
+ ${1}* g_ramp = data->gamma_green;
+ ${1}* b_ramp = data->gamma_blue;
+ size_t rn = data->info.red_gamma_size;
+ size_t gn = data->info.green_gamma_size;
+ size_t bn = data->info.blue_gamma_size;
+ size_t i;
+
+#ifdef DEBUG
+ /* Check gamma ramp sizes. */
+ if (libgamma_dummy_configurations.capabilities.identical_gamma_sizes)
+ if ((ramps.red_size != ramps.green_size) ||
+ (ramps.red_size != ramps.blue_size))
+ return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
+ if ((ramps.red_size != rn) ||
+ (ramps.green_size != gn) ||
+ (ramps.blue_size != bn))
+ return LIBGAMMA_WRONG_GAMMA_RAMP_SIZE;
+#endif
+
+ if (data->info.gamma_support == 0)
+ return LIBGAMMA_GAMMA_RAMP_READ_FAILED;
+
+#define __trans(DEPTH, SUFFIX) \
+ if (data->info.gamma_depth == DEPTH) \
+ return ramps_.${3} = ramps, \
+ libgamma_translated_ramp_set(this, ramps_, ${4}, DEPTH, libgamma_crtc_set_gamma_ramps ## SUFFIX)
+$>if [ ! ${4} = 8 ]; then
+ __trans(8, 8);
+$>fi
+$>if [ ! ${4} = 16 ]; then
+ __trans(16, 16);
+$>fi
+$>if [ ! ${4} = 32 ]; then
+ __trans(32, 32);
+$>fi
+$>if [ ! ${4} = 64 ]; then
+ __trans(64, 64);
+$>fi
+$>if [ ! ${4} = -1 ]; then
+ __trans(-1, f);
+$>fi
+$>if [ ! ${4} = -2 ]; then
+ __trans(-2, d);
+$>fi
+#undef __trans
+
+ for (i = 0; i < rn; i++) r_ramp[i] = ramps.red[i];
+ for (i = 0; i < gn; i++) g_ramp[i] = ramps.green[i];
+ for (i = 0; i < bn; i++) b_ramp[i] = ramps.blue[i];
+
+ return 0;
+}
+$>}
+
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 8-bit gamma-depth version.
+ *
+ * @param this The CRTC state.
+ * @param ramps The gamma ramps to fill with the current values.
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+$>libgamma_dummy_crtc_get_gamma_ramps uint8_t ramps8 bits8 8
+
+
+/**
+ * Set the gamma ramps for a CRTC, 8-bit gamma-depth 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.
+ */
+$>libgamma_dummy_crtc_set_gamma_ramps uint8_t ramps8 bits8 8
+
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 16-bit gamma-depth version.
+ *
+ * @param this The CRTC state.
+ * @param ramps The gamma ramps to fill with the current values.
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+$>libgamma_dummy_crtc_get_gamma_ramps uint16_t ramps16 bits16 16
+
+
+/**
+ * Set the gamma ramps for a CRTC, 16-bit gamma-depth 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.
+ */
+$>libgamma_dummy_crtc_set_gamma_ramps uint16_t ramps16 bits16 16
+
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 32-bit gamma-depth version.
+ *
+ * @param this The CRTC state.
+ * @param ramps The gamma ramps to fill with the current values.
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+$>libgamma_dummy_crtc_get_gamma_ramps uint32_t ramps32 bits32 32
+
+
+/**
+ * Set the gamma ramps for a CRTC, 32-bit gamma-depth 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.
+ */
+$>libgamma_dummy_crtc_set_gamma_ramps uint32_t ramps32 bits32 32
+
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 64-bit gamma-depth version.
+ *
+ * @param this The CRTC state.
+ * @param ramps The gamma ramps to fill with the current values.
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+$>libgamma_dummy_crtc_get_gamma_ramps uint64_t ramps64 bits64 64
+
+
+/**
+ * Set the gamma ramps for a CRTC, 64-bit gamma-depth 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.
+ */
+$>libgamma_dummy_crtc_set_gamma_ramps uint64_t ramps64 bits64 64
+
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `float` version.
+ *
+ * @param this The CRTC state.
+ * @param ramps The gamma ramps to fill with the current values.
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+$>libgamma_dummy_crtc_get_gamma_ramps float rampsf float_single -1
+
+
+/**
+ * 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.
+ */
+$>libgamma_dummy_crtc_set_gamma_ramps float rampsf float_single -1
+
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `double` version.
+ *
+ * @param this The CRTC state.
+ * @param ramps The gamma ramps to fill with the current values.
+ * @return Zero on success, otherwise (negative) the value of an
+ * error identifier provided by this library.
+ */
+$>libgamma_dummy_crtc_get_gamma_ramps double rampsd float_double -2
+
+
+/**
+ * Set the gamma ramps for a CRTC, `double` 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.
+ */
+$>libgamma_dummy_crtc_set_gamma_ramps double rampsd float_double -2
+