m + split out libred

Signed-off-by: Mattias Andrée <maandree@member.fsf.org>

1 files changed, 0 insertions, 130 deletions

diff --git a/src/blackbody.c b/src/blackbody.c
deleted file mode 100644
index d393686..0000000
--- a/src/blackbody.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/**
- * Copyright © 2016  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 <http://www.gnu.org/licenses/>.
- */
-#include "blackbody.h"
-#include "macros.h"
-#include <math.h>
-#include <errno.h>
-
-
-
-/**
- * Convert from CIE xyY to [0, 1] sRGB.
- * 
- * @param  x  The 'x' component.
- * @param  y  The 'y' component.
- * @param  Y  The 'Y' component.
- * @param  r  Output parameter for the “red” value.
- *            (Seriously, sRGB red is orange, just look at it fullscreen.)
- * @param  g  Output parameter for the green value.
- * @param  b  Output parameter for the blue value.
- */
-void
-ciexyy_to_srgb(double x, double y, double Y, double *r, double *g, double *b)
-{
-#define SRGB(C)  (((C) <= 0.0031308) ? (12.92 * (C)) : ((1.0 + 0.055) * pow((C), 1.0 / 2.4) - 0.055))
-	double X, Z;
-
-	/* Convert CIE xyY to CIE XYZ. */
-	X = Y * (y == 0.0 ? 0.0 : (x / y));
-	Z = Y * (y == 0.0 ? 0.0 : ((1.0 - x - y) / y));
-
-	/* Convert CIE XYZ to [0, 1] linear RGB. (ciexyz_to_linear) */
-	*r = ( 3.240450 * X) + (-1.537140 * Y) + (-0.4985320 * Z);
-	*g = (-0.969266 * X) + ( 1.876010 * Y) + ( 0.0415561 * Z);
-	*b = (0.0556434 * X) + (-0.204026 * Y) + ( 1.0572300 * Z);
-
-	/* Convert [0, 1] linear RGB to [0, 1] sRGB. */
-	SRGB(*r), SRGB(*g), SRGB(*b);
-}
-
-
-/**
- * Perform linear interpolation (considered very good)
- * between the CIE xyY values for two colour temperatures
- * and convert the result to sRGB. The two colours should
- * be the closest below the desired colour temperature,
- * and the closest above the desired colour temperature.
- * 
- * @param  x1    The 'x' component for the low colour.
- * @param  y1    The 'y' component for the low colour.
- * @param  x2    The 'x' component for the high colour.
- * @param  y2    The 'y' component for the high colour.
- * @param  temp  The desired colour temperature.
- * @param  r     Output parameter for the “red” value.
- * @param  g     Output parameter for the green value.
- * @param  b     Output parameter for the blue value.
- */
-static void
-interpolate(double x1, double y1, double x2, double y2, double temp, double *r, double *g, double *b)
-{
-	double weight = fmod(temp, (double)DELTA_TEMPERATURE) / (double)DELTA_TEMPERATURE;
-	double x = x1 * (1 - weight) + x2 * weight;
-	double y = y1 * (1 - weight) + y2 * weight;
-	ciexyy_to_srgb(x, y, 1.0, r, g, b);
-}
-
-
-/**
- * Get the [0, 1] sRGB values of a colour temperature.
- * 
- * @param   fd    File descriptor for the colour table.
- * @param   temp  The desired colour temperature.
- * @param   r     Output parameter for the “red” value.
- * @param   g     Output parameter for the green value.
- * @param   b     Output parameter for the blue value.
- * @return        0 on succeess, -1 on error.
- * 
- * @throws  0     The file did not have the expected size.
- * @throws  EDOM  The selected temperature is below 1000 K.
- */
-int
-get_colour(int fd, long int temp, double *r, double *g, double *b)
-{
-	double values[10]; /* low:x,y,r,g,b + high:x,y,r,g,b */
-	off_t offset;
-	double max;
-
-	/* We do not have any values for above 40 000 K, but
-	 * the differences will be unnoticeable, perhaps even
-	 * unencodeable. */
-	if (temp > HIGHEST_TEMPERATURE)  temp = HIGHEST_TEMPERATURE;
-	/* Things do not glow below 1000 K. Yes, fire is hot! */
-	if (temp < LOWEST_TEMPERATURE)   t ((errno = EDOM));
-
-	/* Read table. */
-	offset = ((off_t)temp - LOWEST_TEMPERATURE) / DELTA_TEMPERATURE;
-	offset *= (off_t)(sizeof(values) / 2);
-	errno = 0; xpread(fd, values, sizeof(values), offset);
-
-	/* Get colour. */
-	if (temp % DELTA_TEMPERATURE)
-		interpolate(values[0], values[1], values[6], values[7], (double)temp, r, g, b);
-	else
-		*r = values[2], *g = values[3], *b = values[4];
-
-	/* Adjust colours for use. */
-	max = fmax(fmax(fabs(*r), fabs(*g)), fabs(*b));
-	if (max != 0)  *r /= max, *g /= max, *b /= max;
-	*r = *r > 0.0 ? *r : 0.0;
-	*g = *g > 0.0 ? *g : 0.0;
-	*b = *b > 0.0 ? *b : 0.0;
-
-	return 0;
-fail:
-	return -1;
-}
-