style

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/colourramp.c b/src/colourramp.c
new file mode 100644
index 0000000..1aa7f27
--- /dev/null
+++ b/src/colourramp.c
@@ -0,0 +1,70 @@
+/* colourramp.c -- colour temperature calculation source
+ * This file is part of redshift-ng.
+ * 
+ * redshift-ng 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-ng 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-ng.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ * Copyright (c) 2013, 2014  Jon Lund Steffensen <jonlst@gmail.com>
+ * Copyright (c) 2013        Ingo Thies <ithies@astro.uni-bonn.de> [historical, no longer applies]
+ * Copyright (c) 2016, 2025  Mattias Andrée <m@maandree.se>
+ */
+#include "common.h"
+
+#if defined(__GNUC__)
+# pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
+
+
+#define X(SUFFIX, TYPE, MAX, DEPTH)\
+	/**
+	 * Fill a gamma ramp
+	 * 
+	 * @param  ramp        The gamma ramp
+	 * @param  size        The gamma ramp size (number of stops)
+	 * @param  brightness  The brightness (between 0 and 1) of the channel, which is
+	 *                     the overall applied brightness multiplied but the effect
+	 *                     on the channel from the colour temperature
+	 * @param  gamma       The gamma to apply to the channel
+	 */\
+	static void\
+	fill_ramp_##SUFFIX(TYPE *ramp, size_t size, double brightness, double gamma)\
+	{\
+		size_t i;\
+		double v;\
+		brightness /= (size - 1U);\
+		if (gamma == 1.0) {\
+			brightness *= (MAX);\
+			for (i = 0; i < size; i++)\
+				ramp[i] = (TYPE)(i * brightness);\
+		} else {\
+			gamma = 1.0 / gamma;\
+			for (i = 0; i < size; i++) {\
+				v = pow(i * brightness, gamma) * (MAX);\
+				ramp[i] = (TYPE)v;\
+			}\
+		}\
+	}\
+	\
+	void\
+	colourramp_fill_##SUFFIX(TYPE *gamma_r, TYPE *gamma_g, TYPE *gamma_b,\
+	                         size_t size_r, size_t size_g, size_t size_b,\
+	                         const struct colour_setting *setting)\
+	{\
+		double r = 1, g = 1, b = 1;\
+		libred_get_colour(setting->temperature, &r, &g, &b);\
+		fill_ramp_##SUFFIX(gamma_r, size_r, setting->brightness * r, setting->gamma[0]);\
+		fill_ramp_##SUFFIX(gamma_g, size_g, setting->brightness * g, setting->gamma[1]);\
+		fill_ramp_##SUFFIX(gamma_b, size_b, setting->brightness * b, setting->gamma[2]);\
+	}
+
+LIST_RAMPS_STOP_VALUE_TYPES(X,)