diff options
Diffstat (limited to 'src/lib/gamma-x-vidmode.c')
| -rw-r--r-- | src/lib/gamma-x-vidmode.c | 368 |
1 files changed, 184 insertions, 184 deletions
diff --git a/src/lib/gamma-x-vidmode.c b/src/lib/gamma-x-vidmode.c index 13cc740..bae9d31 100644 --- a/src/lib/gamma-x-vidmode.c +++ b/src/lib/gamma-x-vidmode.c @@ -1,20 +1,4 @@ -/** - * 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/>. - */ +/* See LICENSE file for copyright and license details. */ #ifndef HAVE_LIBGAMMA_METHOD_X_VIDMODE # error Compiling gamma-x-vidmode.c without HAVE_LIBGAMMA_METHOD_X_VIDMODE #endif @@ -31,44 +15,44 @@ /** - * Return the capabilities of the adjustment method. + * Return the capabilities of the adjustment method * - * @param this The data structure to fill with the method's capabilities. + * @param this The data structure to fill with the method's capabilities */ -void libgamma_x_vidmode_method_capabilities(libgamma_method_capabilities_t* restrict this) +void +libgamma_x_vidmode_method_capabilities(libgamma_method_capabilities_t *restrict this) { - char* restrict display = getenv("DISPLAY"); - /* Gamma ramps size and depth can be queried. */ - this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE - | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH; - /* X VidMode supports multiple sites and partitions but not CRTC:s. */ - this->default_site_known = (display && *display) ? 1 : 0; - this->multiple_sites = 1; - this->multiple_partitions = 1; - this->multiple_crtcs = 0; - /* Partitions are screens and not graphics cards in X. */ - this->partitions_are_graphics_cards = 0; - /* X does not have system restore capabilities. */ - this->site_restore = 0; - this->partition_restore = 0; - this->crtc_restore = 0; - /* 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; - /* X VidMode is a real non-faked adjustment method */ - this->real = 1; - this->fake = 0; - /* Gamma ramp adjustments are persistent. */ - this->auto_restore = 0; + char *restrict display = getenv("DISPLAY"); + /* Gamma ramps size and depth can be queried */ + this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH; + /* X VidMode supports multiple sites and partitions but not CRTC:s */ + this->default_site_known = (display && *display) ? 1 : 0; + this->multiple_sites = 1; + this->multiple_partitions = 1; + this->multiple_crtcs = 0; + /* Partitions are screens and not graphics cards in X */ + this->partitions_are_graphics_cards = 0; + /* X does not have system restore capabilities */ + this->site_restore = 0; + this->partition_restore = 0; + this->crtc_restore = 0; + /* 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; + /* X VidMode is a real non-faked adjustment method */ + this->real = 1; + this->fake = 0; + /* Gamma ramp adjustments are persistent */ + this->auto_restore = 0; } /** - * Initialise an allocated site state. + * Initialise an allocated site state * - * @param this The site state to initialise. + * @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 @@ -76,237 +60,253 @@ void libgamma_x_vidmode_method_capabilities(libgamma_method_capabilities_t* rest * 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. + * error identifier provided by this library */ -int libgamma_x_vidmode_site_initialise(libgamma_site_state_t* restrict this, - char* restrict site) +int +libgamma_x_vidmode_site_initialise(libgamma_site_state_t *restrict this, char *restrict site) { - /* Connect to the display. */ - Display* restrict connection = XOpenDisplay(site); - int _major, _minor, screens; - if ((this->data = connection) == NULL) - return LIBGAMMA_OPEN_SITE_FAILED; - /* Query X VidMode extension protocol version. */ - if (!XF86VidModeQueryVersion(connection, &_major, &_minor)) - return XCloseDisplay(connection), LIBGAMMA_PROTOCOL_VERSION_QUERY_FAILED; - /* Query the number of available screens. */ - if ((screens = ScreenCount(connection)) < 0) - return XCloseDisplay(connection), LIBGAMMA_NEGATIVE_PARTITION_COUNT; - this->partitions_available = (size_t)screens; - return 0; + /* Connect to the display */ + Display *restrict connection; + int _major, _minor, screens; + this->data = connection = XOpenDisplay(site); + if (!this->data) + return LIBGAMMA_OPEN_SITE_FAILED; + /* Query X VidMode extension protocol version */ + if (!XF86VidModeQueryVersion(connection, &_major, &_minor)) { + XCloseDisplay(connection); + return LIBGAMMA_PROTOCOL_VERSION_QUERY_FAILED; + } + /* Query the number of available screens */ + screens = ScreenCount(connection); + if (screens < 0) { + XCloseDisplay(connection); + return LIBGAMMA_NEGATIVE_PARTITION_COUNT; + } + this->partitions_available = (size_t)screens; + return 0; } /** - * Release all resources held by a site state. + * Release all resources held by a site state * - * @param this The site state. + * @param this The site state */ -void libgamma_x_vidmode_site_destroy(libgamma_site_state_t* restrict this) +void +libgamma_x_vidmode_site_destroy(libgamma_site_state_t *restrict this) { - XCloseDisplay((Display*)(this->data)); + XCloseDisplay((Display *)this->data); } /** - * Restore the gamma ramps all CRTC:s with a site to the system settings. + * Restore the gamma ramps all CRTC:s with a site to the system settings * - * @param this The site state. + * @param this The site state * @return Zero on success, otherwise (negative) the value of an - * error identifier provided by this library. + * error identifier provided by this library */ -int libgamma_x_vidmode_site_restore(libgamma_site_state_t* restrict this) +int +libgamma_x_vidmode_site_restore(libgamma_site_state_t *restrict this) { - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; + (void) this; + errno = ENOTSUP; + return LIBGAMMA_ERRNO_SET; } /** - * Initialise an allocated partition state. + * 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. + * @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. + * error identifier provided by this library */ -int libgamma_x_vidmode_partition_initialise(libgamma_partition_state_t* restrict this, - libgamma_site_state_t* restrict site, size_t partition) +int +libgamma_x_vidmode_partition_initialise(libgamma_partition_state_t *restrict this, + libgamma_site_state_t *restrict site, size_t partition) { - this->crtcs_available = 1; - return partition >= site->partitions_available ? LIBGAMMA_NO_SUCH_PARTITION : 0; + this->crtcs_available = 1; + return partition < site->partitions_available ? 0 : LIBGAMMA_NO_SUCH_PARTITION; } /** - * Release all resources held by a partition state. + * Release all resources held by a partition state * - * @param this The partition state. + * @param this The partition state */ -void libgamma_x_vidmode_partition_destroy(libgamma_partition_state_t* restrict this) +void +libgamma_x_vidmode_partition_destroy(libgamma_partition_state_t *restrict this) { - (void) this; + (void) this; } /** - * Restore the gamma ramps all CRTC:s with a partition to the system settings. + * Restore the gamma ramps all CRTC:s with a partition to the system settings * - * @param this The partition state. + * @param this The partition state * @return Zero on success, otherwise (negative) the value of an - * error identifier provided by this library. + * error identifier provided by this library */ -int libgamma_x_vidmode_partition_restore(libgamma_partition_state_t* restrict this) +int +libgamma_x_vidmode_partition_restore(libgamma_partition_state_t *restrict this) { - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; + (void) this; + errno = ENOTSUP; + return LIBGAMMA_ERRNO_SET; } /** - * Initialise an allocated CRTC state. + * 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. + * @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. + * error identifier provided by this library */ -int libgamma_x_vidmode_crtc_initialise(libgamma_crtc_state_t* restrict this, - libgamma_partition_state_t* restrict partition, size_t crtc) +int +libgamma_x_vidmode_crtc_initialise(libgamma_crtc_state_t *restrict this, + libgamma_partition_state_t *restrict partition, size_t crtc) { - (void) this; - (void) partition; - return crtc == 0 ? 0 : LIBGAMMA_NO_SUCH_CRTC; + (void) this; + (void) partition; + return !crtc ? 0 : LIBGAMMA_NO_SUCH_CRTC; } /** - * Release all resources held by a CRTC state. + * Release all resources held by a CRTC state * - * @param this The CRTC state. + * @param this The CRTC state */ -void libgamma_x_vidmode_crtc_destroy(libgamma_crtc_state_t* restrict this) +void +libgamma_x_vidmode_crtc_destroy(libgamma_crtc_state_t *restrict this) { - (void) this; + (void) this; } /** - * Restore the gamma ramps for a CRTC to the system settings for that CRTC. + * Restore the gamma ramps for a CRTC to the system settings for that CRTC * - * @param this The CRTC state. + * @param this The CRTC state * @return Zero on success, otherwise (negative) the value of an - * error identifier provided by this library. + * error identifier provided by this library */ -int libgamma_x_vidmode_crtc_restore(libgamma_crtc_state_t* restrict this) +int +libgamma_x_vidmode_crtc_restore(libgamma_crtc_state_t *restrict this) { - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; + (void) this; + errno = ENOTSUP; + return LIBGAMMA_ERRNO_SET; } /** - * Read information about a CRTC. + * 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 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`. + * @return Zero on success, -1 on error; oOn error refer to the error reports in `this` */ -int libgamma_x_vidmode_get_crtc_information(libgamma_crtc_information_t* restrict this, - libgamma_crtc_state_t* restrict crtc, int32_t fields) +int +libgamma_x_vidmode_get_crtc_information(libgamma_crtc_information_t *restrict this, + libgamma_crtc_state_t *restrict crtc, int32_t fields) { #define _E(FIELD) ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0) - - /* X VidMode 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); - this->gamma_size_error = 0; - /* X VidMode does support gamma ramp size query. The gamma - ramps are identical but not fixed, and the query can fail. */ - if ((fields & LIBGAMMA_CRTC_INFO_GAMMA_SIZE)) - { - Display* restrict connection = crtc->partition->site->data; - int stops = 0; - if (!XF86VidModeGetGammaRampSize(connection, (int)(crtc->partition->partition), &stops)) - this->gamma_size_error = LIBGAMMA_GAMMA_RAMPS_SIZE_QUERY_FAILED; - else if (stops < 2) - this->gamma_size_error = LIBGAMMA_SINGLETON_GAMMA_RAMP; - this->red_gamma_size = this->green_gamma_size = this->blue_gamma_size = (size_t)stops; - } - /* X VidMode uses 16-bit integer ramps. */ - this->gamma_depth = 16; - this->gamma_depth_error = 0; - /* X VidMode does not support gamma ramp support queries. */ - this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT); - /* X VidMode 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 & ~(LIBGAMMA_CRTC_INFO_GAMMA_DEPTH | LIBGAMMA_CRTC_INFO_GAMMA_SIZE)) ? -1 : 0; - + + Display *restrict connection; + int stops = 0; + + /* X VidMode 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); + this->gamma_size_error = 0; + /* X VidMode does support gamma ramp size query. The gamma + ramps are identical but not fixed, and the query can fail. */ + if ((fields & LIBGAMMA_CRTC_INFO_GAMMA_SIZE)) { + connection = crtc->partition->site->data; + if (!XF86VidModeGetGammaRampSize(connection, (int)crtc->partition->partition, &stops)) + this->gamma_size_error = LIBGAMMA_GAMMA_RAMPS_SIZE_QUERY_FAILED; + else if (stops < 2) + this->gamma_size_error = LIBGAMMA_SINGLETON_GAMMA_RAMP; + this->red_gamma_size = this->green_gamma_size = this->blue_gamma_size = (size_t)stops; + } + /* X VidMode uses 16-bit integer ramps */ + this->gamma_depth = 16; + this->gamma_depth_error = 0; + /* X VidMode does not support gamma ramp support queries */ + this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT); + /* X VidMode 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 & ~(LIBGAMMA_CRTC_INFO_GAMMA_DEPTH | LIBGAMMA_CRTC_INFO_GAMMA_SIZE))) ? -1 : 0; + #undef _E } /** - * Get the current gamma ramps for a CRTC, 16-bit gamma-depth version. + * 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. + * @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. + * error identifier provided by this library */ -int libgamma_x_vidmode_crtc_get_gamma_ramps16(libgamma_crtc_state_t* restrict this, - libgamma_gamma_ramps16_t* restrict ramps) +int +libgamma_x_vidmode_crtc_get_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_t *restrict ramps) { #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; + /* 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 - /* Read current gamma ramps. */ - if (!XF86VidModeGetGammaRamp((Display*)(this->partition->site->data), (int)(this->partition->partition), - (int)(ramps->red_size), ramps->red, ramps->green, ramps->blue)) - return LIBGAMMA_GAMMA_RAMP_READ_FAILED; - return 0; + /* Read current gamma ramps */ + if (!XF86VidModeGetGammaRamp((Display *)this->partition->site->data, (int)this->partition->partition, + (int)ramps->red_size, ramps->red, ramps->green, ramps->blue)) + return LIBGAMMA_GAMMA_RAMP_READ_FAILED; + return 0; } /** - * Set the gamma ramps for a CRTC, 16-bit gamma-depth version. + * Set the gamma ramps for a CRTC, 16-bit gamma-depth version * - * @param this The CRTC state. - * @param ramps The gamma ramps to apply. + * @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. + * error identifier provided by this library */ -int libgamma_x_vidmode_crtc_set_gamma_ramps16(libgamma_crtc_state_t* restrict this, - libgamma_gamma_ramps16_t ramps) +int +libgamma_x_vidmode_crtc_set_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_t ramps) { #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; + /* 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 - /* Apply gamma ramps. */ - if (!XF86VidModeSetGammaRamp((Display*)(this->partition->site->data), (int)(this->partition->partition), - (int)(ramps.red_size), ramps.red, ramps.green, ramps.blue)) - return LIBGAMMA_GAMMA_RAMP_WRITE_FAILED; - return 0; + /* Apply gamma ramps */ + if (!XF86VidModeSetGammaRamp((Display *)this->partition->site->data, (int)this->partition->partition, + (int)ramps.red_size, ramps.red, ramps.green, ramps.blue)) + return LIBGAMMA_GAMMA_RAMP_WRITE_FAILED; + return 0; } - |