From 6e10b5d8eae9424b831b673e2ec63e9a64ecfe86 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 8 Aug 2014 01:34:43 +0200 Subject: warnings + add state.c MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/state.c | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 src/state.c (limited to 'src/state.c') diff --git a/src/state.c b/src/state.c new file mode 100644 index 0000000..4ca3a75 --- /dev/null +++ b/src/state.c @@ -0,0 +1,135 @@ +/** + * crt-calibrator – Calibration utility for CRT monitors + * 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 . + */ +#include "state.h" + +#include + + +/** + * The framebuffers on the system + */ +framebuffer_t* restrict framebuffers = NULL; + +/** + * The number of elements in `framebuffers` + */ +size_t framebuffer_count = 0; + +/** + * The graphics cards on the system + */ +drm_card_t* restrict cards = NULL; + +/** + * The number of elements in `cards` + */ +size_t card_count = 0; + +/** + * The connected CRT controllers on the system + */ +drm_crtc_t* restrict crtcs = NULL; + +/** + * The number of elements in `crtcs` + */ +size_t crtc_count = 0; + + + +/** + * Acquire video control + * + * @return Zero on success, -1 on error + */ +int acquire_video(void) +{ + size_t f, c, i, fn = fb_count(), cn = drm_card_count(); + drm_crtc_t* restrict old_crtcs; + + framebuffers = malloc(fn * sizeof(framebuffer_t)); + if (framebuffers == NULL) + return -1; + + for (f = 0; f < fn; f++) + { + framebuffer_t fb; + if (fb_open(f, &fb) < 0) + return -1; + framebuffers[framebuffer_count++] = fb; + } + + cards = malloc(cn * sizeof(drm_card_t)); + if (cards == NULL) + return -1; + + for (c = 0; c < cn; c++) + { + drm_card_t card; + if (drm_card_open(c, &card) < 0) + return -1; + cards[card_count++] = card; + + old_crtcs = crtcs; + crtcs = realloc(crtcs, (crtc_count + card.crtc_count) * sizeof(drm_crtc_t)); + if (crtcs == NULL) + { + crtcs = old_crtcs; + return -1; + } + + for (i = 0; i < card.crtc_count; i++) + { + drm_crtc_t crtc; + if (drm_crtc_open(i, cards + c, &crtc) < 0) + return -1; + if (crtc.connected) + crtcs[crtc_count++] = crtc; + else + drm_crtc_close(&crtc); + } + } + + return 0; +} + + +/** + * Release video control + */ +void release_video(void) +{ + size_t i; + + for (i = 0; i < crtc_count; i++) + drm_crtc_close(crtcs + i); + crtc_count = 0; + + for (i = 0; i < card_count; i++) + drm_card_close(cards + i); + card_count = 0; + + for (i = 0; i < framebuffer_count; i++) + fb_close(framebuffers + i); + framebuffer_count = 0; + + free(crtcs), crtcs = NULL; + free(cards), cards = NULL; + free(framebuffers), framebuffers = NULL; +} + -- cgit v1.2.3-70-g09d2