Move source and headers to src dir.

1 files changed, 155 insertions, 0 deletions

diff --git a/src/randr.c b/src/randr.c
new file mode 100644
index 0000000..5226b81
--- /dev/null
+++ b/src/randr.c
@@ -0,0 +1,155 @@
+/* randr.c -- X RandR gamma adjustment source
+   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) 2009  Jon Lund Steffensen <jonlst@gmail.com>
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <xcb/xcb.h>
+#include <xcb/randr.h>
+
+#include "colorramp.h"
+
+
+int
+randr_check_extension()
+{
+	xcb_generic_error_t *error;
+
+	/* Open X server connection */
+	xcb_connection_t *conn = xcb_connect(NULL, NULL);
+
+	/* Query RandR version */
+	xcb_randr_query_version_cookie_t ver_cookie =
+		xcb_randr_query_version(conn, 1, 3);
+	xcb_randr_query_version_reply_t *ver_reply =
+		xcb_randr_query_version_reply(conn, ver_cookie, &error);
+
+	if (error) {
+		fprintf(stderr, "RANDR Query Version, error: %d\n",
+			error->error_code);
+		xcb_disconnect(conn);
+		return -1;
+	}
+
+	if (ver_reply->major_version < 1 || ver_reply->minor_version < 3) {
+		fprintf(stderr, "Unsupported RANDR version (%u.%u)\n",
+			ver_reply->major_version, ver_reply->minor_version);
+		free(ver_reply);
+		xcb_disconnect(conn);
+		return -1;
+	}
+
+	free(ver_reply);
+
+	/* Close connection */
+	xcb_disconnect(conn);
+
+	return 0;
+}
+
+int
+randr_set_temperature(int temp, float gamma[3])
+{
+	xcb_generic_error_t *error;
+
+	/* Open X server connection */
+	xcb_connection_t *conn = xcb_connect(NULL, NULL);
+
+	/* Get first screen */
+	const xcb_setup_t *setup = xcb_get_setup(conn);
+	xcb_screen_iterator_t iter = xcb_setup_roots_iterator(setup);
+	xcb_screen_t *screen = iter.data;
+
+	/* Get list of CRTCs for the screen */
+	xcb_randr_get_screen_resources_current_cookie_t res_cookie =
+		xcb_randr_get_screen_resources_current(conn, screen->root);
+	xcb_randr_get_screen_resources_current_reply_t *res_reply =
+		xcb_randr_get_screen_resources_current_reply(conn, res_cookie,
+							     &error);
+
+	if (error) {
+		fprintf(stderr, "RANDR Get Screen Resources Current,"
+			" error: %d\n", error->error_code);
+		xcb_disconnect(conn);
+		return -1;
+	}
+
+	xcb_randr_crtc_t *crtcs =
+		xcb_randr_get_screen_resources_current_crtcs(res_reply);
+	xcb_randr_crtc_t crtc = crtcs[0];
+
+	free(res_reply);
+
+	/* Request size of gamma ramps */
+	xcb_randr_get_crtc_gamma_size_cookie_t gamma_size_cookie =
+		xcb_randr_get_crtc_gamma_size(conn, crtc);
+	xcb_randr_get_crtc_gamma_size_reply_t *gamma_size_reply =
+		xcb_randr_get_crtc_gamma_size_reply(conn, gamma_size_cookie,
+						    &error);
+
+	if (error) {
+		fprintf(stderr, "RANDR Get CRTC Gamma Size, error: %d\n",
+			error->error_code);
+		xcb_disconnect(conn);
+		return -1;
+	}
+
+	int gamma_ramp_size = gamma_size_reply->size;
+
+	free(gamma_size_reply);
+
+	if (gamma_ramp_size == 0) {
+		fprintf(stderr, "Error: Gamma ramp size too small, %i\n",
+			gamma_ramp_size);
+		xcb_disconnect(conn);
+		return -1;
+	}
+
+	/* Create new gamma ramps */
+	uint16_t *gamma_ramps = malloc(3*gamma_ramp_size*sizeof(uint16_t));
+	if (gamma_ramps == NULL) abort();
+
+	uint16_t *gamma_r = &gamma_ramps[0*gamma_ramp_size];
+	uint16_t *gamma_g = &gamma_ramps[1*gamma_ramp_size];
+	uint16_t *gamma_b = &gamma_ramps[2*gamma_ramp_size];
+
+	colorramp_fill(gamma_r, gamma_g, gamma_b, gamma_ramp_size,
+		       temp, gamma);
+
+	/* Set new gamma ramps */
+	xcb_void_cookie_t gamma_set_cookie =
+		xcb_randr_set_crtc_gamma_checked(conn, crtc, gamma_ramp_size,
+						 gamma_r, gamma_g, gamma_b);
+	error = xcb_request_check(conn, gamma_set_cookie);
+
+	if (error) {
+		fprintf(stderr, "RANDR Set CRTC Gamma, error: %d\n",
+			error->error_code);
+		free(gamma_ramps);
+		xcb_disconnect(conn);
+		return -1;
+	}
+
+	free(gamma_ramps);
+
+	/* Close connection */
+	xcb_disconnect(conn);
+
+	return 0;
+}