From f52513b09580c1533e6c48a4162d3d5f61f3b081 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 5 Mar 2021 18:23:13 +0100 Subject: misc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libgamma_x_vidmode_get_crtc_information.c | 55 +++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 libgamma_x_vidmode_get_crtc_information.c (limited to 'libgamma_x_vidmode_get_crtc_information.c') diff --git a/libgamma_x_vidmode_get_crtc_information.c b/libgamma_x_vidmode_get_crtc_information.c new file mode 100644 index 0000000..8462b1b --- /dev/null +++ b/libgamma_x_vidmode_get_crtc_information.c @@ -0,0 +1,55 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +/** + * 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; 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) +{ +#define _E(FIELD) ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 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 +} -- cgit v1.2.3-70-g09d2