/** * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) * * This program 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 program 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 program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef BLUESHIFT_RANDR_C_H #define BLUESHIFT_RANDR_C_H #include <stdlib.h> #include <stdio.h> #include <inttypes.h> #include <xcb/xcb.h> #include <xcb/randr.h> /** * The major version of RandR the program expects */ #define RANDR_VERSION_MAJOR 1 /** * The minor version of RandR the program expects */ #define RANDR_VERSION_MINOR 3 /** * Data structure for CRTC caches */ typedef struct blueshift_randr_crtc { /** * Size of colour curves on the X-axis */ uint16_t curve_size; /** * CRT controller */ xcb_randr_crtc_t* crtc; } blueshift_randr_crtc_t; /** * Start stage of colour curve control * * @param use_screen The screen to use * @param display The display to use, `NULL` for the current one * @return Zero on success */ int blueshift_randr_open(int use_screen, char* display); /** * Gets the current colour curves * * @param use_crtc The CRTC to use * @return {the size of the red curve, *the red curve, * the size of the green curve, *the green curve, * the size of the blue curve, *the blue curve}, * needs to be free:d. `NULL` on error. */ uint16_t* blueshift_randr_read(int use_crtc); /** * Apply stage of colour curve control * * @param use_crtc The CRTC to use, -1 for all * @param r_curve The red colour curve * @param g_curve The green colour curve * @param b_curve The blue colour curve * @return Zero on success */ int blueshift_randr_apply(int use_crtc, uint16_t* r_curve, uint16_t* g_curve, uint16_t* b_curve); /** * Resource freeing stage of colour curve control */ void blueshift_randr_close(void); #endif