s/substract/subtract/
[monky] / src / colours.c
index 45c1db4..290455e 100644 (file)
@@ -1,4 +1,7 @@
-/* Conky, a system monitor, based on torsmo
+/* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
+ * vim: ts=4 sw=4 noet ai cindent syntax=c
+ *
+ * Conky, a system monitor, based on torsmo
  *
  * Any original torsmo code is licensed under the BSD license
  *
@@ -7,7 +10,7 @@
  * Please see COPYING for details
  *
  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
- * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
+ * Copyright (c) 2005-2010 Brenden Matthews, Philip Kovacs, et. al.
  *     (see AUTHORS)
  * All rights reserved.
  *
@@ -49,7 +52,7 @@ static void set_up_gradient(void)
                colour_depth = 16;
        }
        if (colour_depth != 24 && colour_depth != 16) {
-               ERR("using non-standard colour depth, gradients may look like a "
+               NORM_ERR("using non-standard colour depth, gradients may look like a "
                        "lolly-pop");
        }
 
@@ -88,43 +91,51 @@ unsigned int adjust_colours(unsigned int colour)
 }
 
 /* this function returns the next colour between two colours for a gradient */
-unsigned long *do_gradient(float diff, int width, unsigned long first_colour, unsigned long last_colour)
+unsigned long *do_gradient(int width, unsigned long first_colour, unsigned long last_colour)
 {
        int red1, green1, blue1;                                // first colour
        int red2, green2, blue2;                                // last colour
+       int reddiff, greendiff, bluediff;               // difference
        short redshift = (2 * colour_depth / 3 + colour_depth % 3);
        short greenshift = (colour_depth / 3);
        unsigned long *colours = malloc(width * sizeof(unsigned long));
        int i;
 
+       if (colour_depth == 0) {
+               set_up_gradient();
+       }
        red1 = (first_colour & redmask) >> redshift;
        green1 = (first_colour & greenmask) >> greenshift;
        blue1 = first_colour & bluemask;
        red2 = (last_colour & redmask) >> redshift;
        green2 = (last_colour & greenmask) >> greenshift;
        blue2 = last_colour & bluemask;
+       reddiff = abs(red1 - red2);
+       greendiff = abs(green1 - green2);
+       bluediff = abs(blue1 - blue2);
 #ifdef HAVE_OPENMP
-#pragma omp parallel for
+#pragma omp parallel for schedule(dynamic,10) shared(colours)
 #endif /* HAVE_OPENMP */
        for (i = 0; i < width; i++) {
                int red3 = 0, green3 = 0, blue3 = 0;    // colour components
 
-               int factor = round_to_int(diff * ((float)i / width));
+               float factor = ((float)(i + 1) / width);
 
-               if (red1 > red2) {
-                       red3 = -factor;
+               /* the '+ 0.5' bit rounds our floats to ints properly */
+               if (red1 >= red2) {
+                       red3 = -(factor * reddiff) - 0.5;
                } else if (red1 < red2) {
-                       red3 = factor;
+                       red3 = factor * reddiff + 0.5;
                }
-               if (green1 > green2) {
-                       green3 = -factor;
+               if (green1 >= green2) {
+                       green3 = -(factor * greendiff) - 0.5;
                } else if (green1 < green2) {
-                       green3 = factor;
+                       green3 = factor * greendiff + 0.5;
                }
-               if (blue1 > blue2) {
-                       blue3 = -factor;
+               if (blue1 >= blue2) {
+                       blue3 = -(factor * bluediff) - 0.5;
                } else if (blue1 < blue2) {
-                       blue3 = factor;
+                       blue3 = factor * bluediff + 0.5;
                }
                red3 += red1;
                green3 += green1;
@@ -144,47 +155,38 @@ unsigned long *do_gradient(float diff, int width, unsigned long first_colour, un
                if (green3 > bluemask) {
                        green3 = bluemask;
                }
-               if (blue1 > bluemask) {
-                       blue1 = bluemask;
+               if (blue3 > bluemask) {
+                       blue3 = bluemask;
                }
                colours[i] = (red3 << redshift) | (green3 << greenshift) | blue3;
        }
        return colours;
 }
 
-/* this function returns the max diff for a gradient */
-unsigned long gradient_max(unsigned long first_colour,
-               unsigned long last_colour)
+#ifdef X11
+long get_x11_color(const char *name)
 {
-       int red1, green1, blue1;                                // first colour
-       int red2, green2, blue2;                                // second colour
-       int red3 = 0, green3 = 0, blue3 = 0;                    // difference
-       long redshift, greenshift;
-       int max;
-
-       if (colour_depth == 0) {
-               set_up_gradient();
-       }
-       redshift = (2 * colour_depth / 3 + colour_depth % 3);
-       greenshift = (colour_depth / 3);
+       XColor color;
 
-       red1 = (first_colour & redmask) >> redshift;
-       green1 = (first_colour & greenmask) >> greenshift;
-       blue1 = first_colour & bluemask;
-       red2 = (last_colour & redmask) >> redshift;
-       green2 = (last_colour & greenmask) >> greenshift;
-       blue2 = last_colour & bluemask;
-       red3 = abs(red1 - red2);
-       green3 = abs(green1 - green2);
-       blue3 = abs(blue1 - blue2);
-       max = red3;
+       color.pixel = 0;
+       if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
+               /* lets check if it's a hex colour with the # missing in front
+                * if yes, then do something about it */
+               char newname[DEFAULT_TEXT_BUFFER_SIZE];
 
-       if (green3 > max) {
-               max = green3;
+               newname[0] = '#';
+               strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
+               /* now lets try again */
+               if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
+                                       &color)) {
+                       NORM_ERR("can't parse X color '%s'", name);
+                       return 0xFF00FF;
+               }
        }
-       if (blue3 > max) {
-               max = blue3;
+       if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
+               NORM_ERR("can't allocate X color '%s'", name);
        }
-       return max;
-}
 
+       return (long) color.pixel;
+}
+#endif