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author | Mattias Andrée <maandree@kth.se> | 2021-02-20 23:20:05 +0100 |
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committer | Mattias Andrée <maandree@kth.se> | 2021-02-20 23:20:11 +0100 |
commit | 91ce2e7e5c8c7659237b89b8c4a072b1c46b1fca (patch) | |
tree | ae87077ad8d6aaa4cbb064f092fe3b380b9852d6 /state.c | |
parent | update dist (diff) | |
download | crt-calibrator-91ce2e7e5c8c7659237b89b8c4a072b1c46b1fca.tar.gz crt-calibrator-91ce2e7e5c8c7659237b89b8c4a072b1c46b1fca.tar.bz2 crt-calibrator-91ce2e7e5c8c7659237b89b8c4a072b1c46b1fca.tar.xz |
misc + change license + remove info manual1.3.2
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'state.c')
-rw-r--r-- | state.c | 144 |
1 files changed, 144 insertions, 0 deletions
@@ -0,0 +1,144 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +/** + * 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 software brightness setting on each connected CRT controller, on each channel + */ +double *restrict brightnesses[3]; + +/** + * The software contrast setting on each connected CRT controller, on each channel + */ +double *restrict contrasts[3]; + +/** + * The gamma correction on each connected CRT controller, on each channel + */ +double *restrict gammas[3]; + +/** + * The number of elements in `crtcs`, `brightnesses[]`, `contrasts[]` and `gammas[]` + */ +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, crtc; + drm_card_t card; + framebuffer_t fb; + + framebuffers = malloc(fn * sizeof(framebuffer_t)); + if (!framebuffers) + return -1; + + for (f = 0; f < fn; f++) { + if (fb_open(f, &fb) < 0) + return -1; + framebuffers[framebuffer_count++] = fb; + } + + cards = malloc(cn * sizeof(drm_card_t)); + if (!cards) + return -1; + + for (c = 0; c < cn; c++) { + 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) { + crtcs = old_crtcs; + return -1; + } + + for (i = 0; i < card.crtc_count; i++) { + if (drm_crtc_open(i, cards + c, &crtc) < 0) + return -1; + if (crtc.connected) + crtcs[crtc_count++] = crtc; + else + drm_crtc_close(&crtc); + } + } + + for (c = 0; c < 3; c++) { + brightnesses[c] = malloc(crtc_count * sizeof(double)); + if (!brightnesses[c]) + return -1; + contrasts[c] = malloc(crtc_count * sizeof(double)); + if (!contrasts[c]) + return -1; + gammas[c] = malloc(crtc_count * sizeof(double)); + if (!gammas[c]) + return -1; + } + + return 0; +} + + +/** + * Release video control + */ +void +release_video(void) +{ + size_t i; + while (crtc_count) + drm_crtc_close(&crtcs[--crtc_count]); + while (card_count) + drm_card_close(&cards[--card_count]); + while (framebuffer_count) + fb_close(&framebuffers[--framebuffer_count]); + for (i = 0; i < 3; i++) { + free(brightnesses[i]); + free(contrasts[i]); + free(gammas[i]); + brightnesses[i] = NULL; + contrasts[i] = NULL; + gammas[i] = NULL; + } + free(crtcs); + free(cards); + free(framebuffers); + crtcs = NULL; + cards = NULL; + framebuffers = NULL; +} |