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Diffstat (limited to '')
| -rw-r--r-- | src/lib/gamma-wayland.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/src/lib/gamma-wayland.c b/src/lib/gamma-wayland.c new file mode 100644 index 0000000..ceeacd5 --- /dev/null +++ b/src/lib/gamma-wayland.c @@ -0,0 +1,850 @@ +/** + * libgamma -- Display server abstraction layer for gamma ramp adjustments + * Copyright (C) 2014, 2015 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_WAYLAND +# error Compiling gamma-wayland.c without HAVE_LIBGAMMA_METHOD_WAYLAND +#endif + +#include "gamma-wayland.h" +#ifdef __GCC__ +# pragma GCC diagnostic push +# pragma GCC diagnostic ignored "-Wcast-qual" +#endif +#include "wayland-gamma-control-client-protocol.h" +#ifdef __GCC__ +# pragma GCC diagnostic pop +#endif + +#include "libgamma-error.h" + +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <stdint.h> +#ifdef DEBUG +# include <stdio.h> +#endif + +#include <wayland-client.h> + + + +/** + * This function is called when the display server + * announces global resources. + * + * @param site_state The site state + * @param registry The event handler + * @param id The ID of the resource + * @param interface The name of the resource's type + * @param version The version of the resource's type + */ +static void registry_global_handler(void* site_state, struct wl_registry* registry, uint32_t id, + const char* interface, uint32_t version); + +/** + * This function is called when the display server + * announces that global resources have been removed. + * + * @param site_state The site state + * @param registry The event handler + * @param id The ID of the resource + */ +static void registry_global_remover(void* site_state, struct wl_registry* registry, uint32_t id); + +/** + * This function is invoked when the display + * server tells us the size of a gamma ramp. + * + * @param crtc_data The protocol-specific data for the CRTC + * @param control The gamma ramp controll for the CRTC + * @param size The number of stops in the gamma ramps of the CRTC + */ +static void gamma_control_gamma_size(void* crtc_data, struct gamma_control* control, uint32_t size); + +/** + * This function is invoked when the display server + * tells us that a request has been completed. + * + * @param crtc_data The protocol-specific data for the CRTC + * @param callback The callback + * @param request_data Request-specific callback data + */ +static void display_synced(void* crtc_data, struct wl_callback* callback, uint32_t request_data); + +/** + * This function is called when the display server + * tells us about an output's geometry. + * + * @param crtc_data The protocol-specific data for the CRTC + * @param output The output + * @param x The left position, within the global compositor space, of the output + * @param y The top position, within the global compositor space, of the output + * @param physical_width Width in millimeters of the monitor's viewport + * @param physical_height Weight in millimeters of the monitor's viewport + * @param subpixel_ The monitor's subpixel-orientation + * @param make Textual description of the monitor's manufacturer + * @param model Textual description of the monitor's model + * @param transform Output flipping and rotation + */ +static void geometry(void* crtc_data, struct wl_output* output, int32_t x, int32_t y, + int32_t physical_width, int32_t physical_height, int32_t subpixel_, + const char* make, const char* model, int32_t transform); + + + +/** + * Data structure for CRTC data. + */ +typedef struct libgamma_wayland_crtc_data +{ + /** + * Wayland-representation of the output. + */ + struct wl_output* output; + + /** + * Display synchronisation callback. + */ + struct wl_callback* display_sync; + + /** + * Gamma controller for the output. + */ + struct gamma_control* gamma_control; + + /** + * The size of the gamma ramps. + */ + uint32_t gamma_size; + + /** + * Whether `gamma_size` has been set. + */ + int gamma_size_announced; + + /** + * Whether gamma may be supported. + */ + int gamma_maybe_supported; + + /** + * ID of the CRTC. + */ + uint32_t global_id; + + /** + * Whether the CRTC has been removed. + */ + int removed; + + /** + * Whether the CRTC have an geometry listener assigned. + */ + int have_geometry_listener; + + /** + * The output's geometry. + */ + libgamma_crtc_information_t geometry; + +} libgamma_wayland_crtc_data_t; + + +/** + * Data structure for site data. + */ +typedef struct libgamma_wayland_site_data +{ + /** + * Connection to the display. + */ + struct wl_display* display; + + /** + * Event handlers for the display. + */ + struct wl_registry* registry; + + /** + * Gamma controller for the display. + */ + struct gamma_control_manager* gamma_control_manager; + + /** + * The number of CRTC:s that are available under this + * partition. Note that the CRTC:s are not necessarily + * online. + */ + size_t crtcs_available; + + /** + * The number of CRTC:s that are available under this + * partition. Note that the CRTC:s are not necessarily + * online. + */ + size_t crtcs_allocated; + + /** + * CRTC information fields. + */ + libgamma_wayland_crtc_data_t** crtcs; + + /** + * Error set from `registry_global_handler`. + */ + int async_errno; + + /** + * Whether gamma may be supported. + */ + int gamma_maybe_supported; + +} libgamma_wayland_site_data_t; + + +/** + * Event handlers for the display. + */ +static const struct wl_registry_listener registry_listener = + { + registry_global_handler, + registry_global_remover, + }; + +/** + * Gamma event handlers for CRTC:s. + */ +static const struct gamma_control_listener gamma_control_listener = + { + gamma_control_gamma_size, + }; + +/** + * Output event handlers. + */ +static const struct wl_output_listener output_listener = + { + geometry, + NULL, + NULL, + NULL, + }; + +static const struct wl_callback_listener display_sync_listener = + { + display_synced, + }; + + + +/** + * Return the capabilities of the adjustment method. + * + * @param this The data structure to fill with the method's capabilities. + */ +void libgamma_wayland_method_capabilities(libgamma_method_capabilities_t* restrict this) +{ + char* display = getenv("WAYLAND_DISPLAY"); + this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE + | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH + | LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT + | LIBGAMMA_CRTC_INFO_MACRO_VIEWPORT + | LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER; + /* Wayland supports multiple sites and CRTC:s, but not paritions. */ + this->default_site_known = (display && *display) ? 1 : 0; + this->multiple_sites = 1; + this->multiple_partitions = 0; + this->multiple_crtcs = 1; + this->partitions_are_graphics_cards = 0; + /* Wayland/Orbital has per-CRTC restore capabilities. */ + this->site_restore = 0; + this->partition_restore = 0; + this->crtc_restore = 1; + /* Gamma ramp sizes are identical but not fixed. */ + this->identical_gamma_sizes = 1; + this->fixed_gamma_size = 0; + /* Gamma ramp depths are fixed. */ + this->fixed_gamma_depth = 1; + /* Wayland/Orbital is a real non-faked adjustment method. */ + this->real = 1; + this->fake = 0; +} + + +/** + * This function is called when the display server + * announces global resources. + * + * @param site_state The site state + * @param registry The event handler + * @param id The ID of the resource + * @param interface The name of the resource's type + * @param version The version of the resource's type + */ +static void registry_global_handler(void* site_state, struct wl_registry* registry, uint32_t id, + const char* interface, uint32_t version) +{ + libgamma_site_state_t* site = site_state; + libgamma_wayland_site_data_t* data = site->data; + libgamma_wayland_crtc_data_t** crtcs = data->crtcs; + libgamma_wayland_crtc_data_t* crtc; + size_t new_allocation, i; + + (void) version; + + /* Stop if an earlier call failed. */ + if (data->async_errno) + return; + + if (!strcmp(interface, "gamma_control_manager")) + { + data->gamma_control_manager = wl_registry_bind(registry, id, &gamma_control_manager_interface, 1); + if (data->gamma_control_manager == NULL) + data->async_errno = errno; + } + else if (!strcmp(interface, "wl_output")) + { + /* Check that ID is not used. */ + for (i = 0; i < data->crtcs_available; i++) + if (crtcs[i] && (crtcs[i]->global_id == id)) + return; + + /* Reallocate CRTC resource array. */ + if (data->crtcs_available == data->crtcs_allocated) + { + new_allocation = data->crtcs_allocated ? (data->crtcs_allocated << 1) : 1; + crtcs = realloc(crtcs, new_allocation * sizeof(libgamma_wayland_crtc_data_t*)); + if (crtcs == NULL) + { + data->async_errno = errno; + return; + } + data->crtcs = crtcs; + data->crtcs_allocated = new_allocation; + } + + /* Allocate CRTC resource. */ + crtc = calloc(1, sizeof(libgamma_wayland_crtc_data_t)); + crtcs[data->crtcs_available] = crtc; + if (crtc == NULL) + { + data->async_errno = errno; + return; + } + + /* Set CRTC data. */ + crtc->global_id = id; + crtc->output = wl_registry_bind(registry, id, &wl_output_interface, 1); + crtc->removed = 0; + + /* Increase CRTC cound and check for overflow. */ + if (data->crtcs_available++ == (size_t)~0) + { + free(crtc); + data->async_errno = LIBGAMMA_IMPOSSIBLE_AMOUNT; + return; + } + } +} + + +/** + * This function is called when the display server + * announces that global resources have been removed. + * + * @param site_state The site state + * @param registry The event handler + * @param id The ID of the resource + */ +static void registry_global_remover(void* site_state, struct wl_registry* registry, uint32_t id) +{ + libgamma_site_state_t* site = site_state; + libgamma_wayland_site_data_t* data = site->data; + libgamma_wayland_crtc_data_t* crtc; + size_t i; + + (void) registry; + + for (i = 0; i < data->crtcs_available; i++) + if ((crtc = data->crtcs[i])) + if (crtc->global_id == id) + { + crtc->removed = 1; + break; + } +} + + +/** + * 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_wayland_site_initialise(libgamma_site_state_t* restrict this, + char* restrict site) +{ + libgamma_wayland_site_data_t* data; + + /* Allocate adjustment method dependent data memory area. + We use `calloc` because we want `data`'s pointers to be `NULL` if not allocated at `fail`. */ + if ((this->data = data = calloc(1, sizeof(libgamma_wayland_site_data_t))) == NULL) + return LIBGAMMA_ERRNO_SET; + + /* Connect to the display server. */ + data->display = wl_display_connect(site); + if (data->display == NULL) + return LIBGAMMA_OPEN_SITE_FAILED; + data->registry = wl_display_get_registry(data->display); + if (data->registry == NULL) + return LIBGAMMA_ERRNO_SET; + if (wl_registry_add_listener(data->registry, ®istry_listener, this) < 0) + return LIBGAMMA_ERRNO_SET; + + /* Synchronise with display. */ + if (wl_display_roundtrip(data->display) < 0) + return LIBGAMMA_ERRNO_SET; + + /* Check for errors. */ + if (data->async_errno > 0) + return errno = data->async_errno, LIBGAMMA_ERRNO_SET; + if (data->async_errno < 0) + return data->async_errno; + + /* Check that we have a gamma controller. */ + if (data->gamma_control_manager) + data->gamma_maybe_supported = 1; + + this->partitions_available = 1; + return 0; +} + + +/** + * Release all resources held by a site state. + * + * @param this The site state. + */ +void libgamma_wayland_site_destroy(libgamma_site_state_t* restrict this) +{ + libgamma_wayland_site_data_t* data = this->data; + libgamma_wayland_crtc_data_t* crtc; + if (data->gamma_control_manager != NULL) + gamma_control_manager_destroy(data->gamma_control_manager); + if (data->registry != NULL) + wl_registry_destroy(data->registry); + if (data->display != NULL) + wl_display_disconnect(data->display); + while (data->crtcs_available--) + { + crtc = data->crtcs[data->crtcs_available]; + if (crtc->gamma_control != NULL) + gamma_control_destroy(crtc->gamma_control); + if (crtc->output != NULL) + wl_output_destroy(crtc->output); + if (crtc->display_sync != NULL) + wl_callback_destroy(crtc->display_sync); + free(crtc); + } + free(data->crtcs); + 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_wayland_site_restore(libgamma_site_state_t* restrict this) +{ + (void) this; + return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; +} + + +/** + * 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_wayland_partition_initialise(libgamma_partition_state_t* restrict this, + libgamma_site_state_t* restrict site, size_t partition) +{ + libgamma_wayland_site_data_t* data = site->data; + + this->data = NULL; + this->crtcs_available = 0; + + if (partition != 0) + return LIBGAMMA_NO_SUCH_PARTITION; + + this->crtcs_available = data->crtcs_available; + return 0; +} + + +/** + * Release all resources held by a partition state. + * + * @param this The partition state. + */ +void libgamma_wayland_partition_destroy(libgamma_partition_state_t* restrict this) +{ + (void) this; +} + + +/** + * 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_wayland_partition_restore(libgamma_partition_state_t* restrict this) +{ + return libgamma_wayland_site_restore(this->site); +} + + +/** + * This function is invoked when the display + * server tells us the size of a gamma ramp. + * + * @param crtc_data The protocol-specific data for the CRTC + * @param control The gamma ramp controll for the CRTC + * @param size The number of stops in the gamma ramps of the CRTC + */ +static void gamma_control_gamma_size(void* crtc_data, struct gamma_control* control, uint32_t size) +{ + libgamma_wayland_crtc_data_t* data = crtc_data; + (void) control; + data->gamma_size = size; + data->gamma_size_announced = 1; +} + + +/** + * 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_wayland_crtc_initialise(libgamma_crtc_state_t* restrict this, + libgamma_partition_state_t* restrict partition, size_t crtc) +{ + libgamma_wayland_crtc_data_t* data; + libgamma_wayland_site_data_t* site = partition->site->data; + + this->data = NULL; + + if (crtc >= partition->crtcs_available) + return LIBGAMMA_NO_SUCH_CRTC; + + data = site->crtcs[crtc]; + + if (site->gamma_maybe_supported == 0) + return this->data = data, 0; + + data->gamma_control = gamma_control_manager_get_gamma_control(site->gamma_control_manager, data->output); + if (data->gamma_control) + { + data->gamma_maybe_supported = 1; + gamma_control_add_listener(data->gamma_control, &gamma_control_listener, data); + } + if (wl_display_roundtrip(site->display) < 0) + return LIBGAMMA_ERRNO_SET; + if (data->gamma_size_announced == 0) + data->gamma_maybe_supported = 0; + else if (data->gamma_size < 2) + return LIBGAMMA_SINGLETON_GAMMA_RAMP; + + this->data = data; + + return 0; +} + + +/** + * Release all resources held by a CRTC state. + * + * @param this The CRTC state. + */ +void libgamma_wayland_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_wayland_crtc_restore(libgamma_crtc_state_t* restrict this) +{ + libgamma_wayland_crtc_data_t* data = this->data; + libgamma_wayland_site_data_t* site = this->partition->site->data; + gamma_control_reset_gamma(data->gamma_control); + if (wl_display_flush(site->display) < 0) + return LIBGAMMA_ERRNO_SET; + return 0; +} + + + +/** + * This function is called when the display server + * tells us about an output's geometry. + * + * @param crtc_data The protocol-specific data for the CRTC + * @param output The output + * @param x The left position, within the global compositor space, of the output + * @param y The top position, within the global compositor space, of the output + * @param physical_width Width in millimeters of the monitor's viewport + * @param physical_height Weight in millimeters of the monitor's viewport + * @param subpixel_ The monitor's subpixel-orientation + * @param make Textual description of the monitor's manufacturer + * @param model Textual description of the monitor's model + * @param transform Output flipping and rotation + */ +static void geometry(void* crtc_data, struct wl_output* output, int32_t x, int32_t y, + int32_t physical_width, int32_t physical_height, int32_t subpixel_, + const char* make, const char* model, int32_t transform) +{ + libgamma_wayland_crtc_data_t* data = crtc_data; + libgamma_crtc_information_t* info = &(data->geometry); + enum wl_output_subpixel subpixel = subpixel_; + + (void) output; + (void) x; + (void) y; + (void) transform; + (void) make; /* TODO new field (fix after merge to master branch) */ + (void) model; /* TODO new field (fix after merge to master branch) */ + + info->width_mm = (size_t)(physical_width < 0 ? 0 : physical_width); + info->height_mm = (size_t)(physical_height < 0 ? 0 : physical_height); + info->width_mm_error = 0; + info->height_mm_error = 0; + + info->subpixel_order_error = 0; + switch (subpixel) + { +#define O(ORDER) \ + case WL_OUTPUT_SUBPIXEL_##ORDER: \ + info->subpixel_order = LIBGAMMA_SUBPIXEL_ORDER_##ORDER; \ + break + O(UNKNOWN); + O(NONE); + O(HORIZONTAL_RGB); + O(HORIZONTAL_BGR); + O(VERTICAL_RGB); + O(VERTICAL_BGR); +#undef O + default: + info->subpixel_order_error = LIBGAMMA_SUBPIXEL_ORDER_NOT_RECOGNISED; + break; + } +} + + +/** + * 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_wayland_get_crtc_information(libgamma_crtc_information_t* restrict this, + libgamma_crtc_state_t* restrict crtc, int32_t fields) +{ +#define _EE(FIELD, ERROR) ((fields & FIELD) ? ERROR : 0) +#define _E(FIELD) _EE(FIELD, LIBGAMMA_CRTC_INFO_NOT_SUPPORTED) + + libgamma_wayland_crtc_data_t* data = crtc->data; + libgamma_wayland_site_data_t* site = crtc->partition->site->data; + int e = 0; + + /* Wipe all error indicators. */ + memset(this, 0, sizeof(libgamma_crtc_information_t)); + + + /* Get geometry. */ + this->width_mm_error = _EE(LIBGAMMA_CRTC_INFO_WIDTH_MM, LIBGAMMA_OUTPUT_INFORMATION_QUERY_FAILED); + this->height_mm_error = _EE(LIBGAMMA_CRTC_INFO_HEIGHT_MM, LIBGAMMA_OUTPUT_INFORMATION_QUERY_FAILED); + this->subpixel_order_error = _EE(LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER, LIBGAMMA_OUTPUT_INFORMATION_QUERY_FAILED); + if (this->width_mm_error || this->height_mm_error || this->subpixel_order_error) + { + if (data->have_geometry_listener == 0) + { + data->have_geometry_listener = 1; + data->geometry = *this; + wl_output_add_listener(data->output, &output_listener, data); + wl_display_roundtrip(site->display); + } + *this = data->geometry; + e |= this->width_mm_error | this->height_mm_error | this->subpixel_order_error; + } + + + /* There is no support for EDID, or any other way to get the gamma. */ + e |= this->edid_error = _E(LIBGAMMA_CRTC_INFO_EDID); + e |= this->width_mm_edid_error = _E(LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID); + e |= this->height_mm_edid_error = _E(LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID); + e |= this->gamma_error = _E(LIBGAMMA_CRTC_INFO_GAMMA); + + /* Store gamma size. */ + this->red_gamma_size = (size_t)(data->gamma_size); + this->green_gamma_size = (size_t)(data->gamma_size); + this->blue_gamma_size = (size_t)(data->gamma_size); + e |= this->gamma_size_error = data->gamma_maybe_supported ? 0 : + _EE(LIBGAMMA_CRTC_INFO_GAMMA_SIZE, LIBGAMMA_GAMMA_RAMPS_NOT_SUPPORTED); + + /* Store gamma depth and gamma support. */ + this->gamma_depth = 16; + this->gamma_support = data->gamma_maybe_supported; + + /* Store active. */ + this->active = data->removed == 0; + + /* There is no connector support. */ + e |= this->connector_name_error = _E(LIBGAMMA_CRTC_INFO_CONNECTOR_NAME); + e |= this->connector_type_error = _E(LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE); + + + /* There was a failure if and only if unsupport field was requested. */ + return e ? -1 : 0; + +#undef _E +#undef _EE +} + + +/** + * Get the current 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. + */ +int libgamma_wayland_crtc_get_gamma_ramps16(libgamma_crtc_state_t* restrict this, + libgamma_gamma_ramps16_t* restrict ramps) +{ + (void) this; + (void) ramps; + return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; +} + + +/** + * This function is invoked when the display server + * tells us that a request has been completed. + * + * @param crtc_data The protocol-specific data for the CRTC + * @param callback The callback + * @param request_data Request-specific callback data + */ +static void display_synced(void* crtc_data, struct wl_callback* callback, uint32_t request_data) +{ + libgamma_wayland_crtc_data_t* crtc = crtc_data; + + (void) request_data; + + crtc->display_sync = NULL; + wl_callback_destroy(callback); +} + + +/** + * 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. + */ +int libgamma_wayland_crtc_set_gamma_ramps16(libgamma_crtc_state_t* restrict this, + libgamma_gamma_ramps16_t ramps) +{ + libgamma_wayland_site_data_t* site = this->partition->site->data; + libgamma_wayland_crtc_data_t* crtc = this->data; + struct wl_array red; + struct wl_array green; + struct wl_array blue; + int r = 0; + + /* Verify that gamma can be set. */ +#ifdef DEBUG + if (crtc->gamma_maybe_supported == 0) + return LIBGAMMA_GAMMA_RAMPS_NOT_SUPPORTED; +#endif + if (crtc->removed) + return 0; + +#ifdef DEBUG + /* Gamma ramp 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 + + /* Translate gamma ramps to Wayland structure. */ + red .size = red .alloc = ramps. red_size * sizeof(uint16_t); + green.size = green.alloc = ramps.green_size * sizeof(uint16_t); + blue .size = blue .alloc = ramps. blue_size * sizeof(uint16_t); + red .data = ramps.red; + green.data = ramps.green; + blue .data = ramps.blue; + + /* Apply gamma ramps. */ + gamma_control_set_gamma(crtc->gamma_control, &red, &green, &blue); + crtc->display_sync = wl_display_sync(site->display); + wl_callback_add_listener(crtc->display_sync, &display_sync_listener, crtc); + wl_display_flush(site->display); + while (crtc->display_sync && (r >= 0)) + r = wl_display_dispatch(site->display); + if (r < 0) + return LIBGAMMA_GAMMA_RAMP_WRITE_FAILED; + + /* TODO Check for errors. */ + + return 0; +} + |