Support for running Redshift without a graphical environment in Linux by using Direct Rendering Manager

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/gamma-drm.h b/src/gamma-drm.h
new file mode 100644
index 0000000..8ef0ba5
--- /dev/null
+++ b/src/gamma-drm.h
@@ -0,0 +1,58 @@
+/* gamma-drm.h -- DRM gamma adjustment header
+   This file is part of Redshift.
+
+   Redshift 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.
+
+   Redshift 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 Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2014  Mattias Andrée <maandree@member.fsf.org>
+*/
+
+#ifndef _REDSHIFT_GAMMA_DRM_H
+#define _REDSHIFT_GAMMA_DRM_H
+
+#include <stdint.h>
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+
+typedef struct {
+	int crtc_num;
+	int crtc_id;
+	int gamma_size;
+	uint16_t* r_gamma;
+	uint16_t* g_gamma;
+	uint16_t* b_gamma;
+} drm_crtc_state_t;
+
+typedef struct {
+	int card_num;
+	int crtc_num;
+	int fd;
+	drmModeRes* res;
+	drm_crtc_state_t* crtcs;
+} drm_state_t;
+
+
+int drm_init(drm_state_t *state);
+int drm_start(drm_state_t *state);
+void drm_free(drm_state_t *state);
+
+void drm_print_help(FILE *f);
+int drm_set_option(drm_state_t *state, const char *key, const char *value);
+
+void drm_restore(drm_state_t *state);
+int drm_set_temperature(drm_state_t *state, int temp, float brightness, const float gamma[3]);
+
+
+#endif /* ! _REDSHIFT_GAMMA_DRM_H */