Fix colour-model and simplify xloadcols() - st - Simple Terminal

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---

commit 3544e354b2dcdfcced1a2f4aeedb4d479abd543c

parent cf890e5bf06a65a35fe195aa1ef8ae3e1eb55f51

Author: FRIGN 

Date:   Thu, 22 May 2014 15:00:33 +0200

Fix colour-model and simplify xloadcols()

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Diffstat:
  st.c                                |      56 +++++++++++--------------------

1 file changed, 20 insertions(+), 36 deletions(-)
---

diff --git a/st.c b/st.c

@@ -340,7 +340,7 @@ typedef struct {
 
 /* Drawing Context */
 ttypedef struct {
-        Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
+        Colour col[MAX(LEN(colorname), 256)];
         Font font, bfont, ifont, ibfont;
         GC gc;
 } DC;
@@ -2715,7 +2715,7 @@ sixd_to_16bit(int x) {
 
 void
 xloadcols(void) {
-        int i, r, g, b;
+        int i;
         XRenderColor color = { .alpha = 0xffff };
         static bool loaded;
         Colour *cp;
@@ -2725,7 +2725,7 @@ xloadcols(void) {
                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
         }
 
-        /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
+        /* load colours [0-15] and [256-LEN(colorname)] (config.h) */
         for(i = 0; i < LEN(colorname); i++) {
                 if(!colorname[i])
                         continue;
@@ -2734,27 +2734,20 @@ xloadcols(void) {
                 }
         }
 
-        /* load colors [16-255] ; same colors as xterm */
-        for(i = 16, r = 0; r < 6; r++) {
-                for(g = 0; g < 6; g++) {
-                        for(b = 0; b < 6; b++) {
-                                color.red = sixd_to_16bit(r);
-                                color.green = sixd_to_16bit(g);
-                                color.blue = sixd_to_16bit(b);
-                                if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
-                                        die("Could not allocate color %d\n", i);
-                                }
-                                i++;
-                        }
-                }
+        /* load colours [16-231] ; same colours as xterm */
+        for(i = 16; i < 6*6*6+16; i++) {
+                color.red   = sixd_to_16bit( ((i-16)/36)%6 );
+                color.green = sixd_to_16bit( ((i-16)/6) %6 );
+                color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
+                if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
+                        die("Could not allocate color %d\n", i);
         }
-
-        for(r = 0; r < 24; r++, i++) {
-                color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
-                if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
-                                        &dc.col[i])) {
+        
+        /* load colours [232-255] ; grayscale */
+        for(; i < 256; i++) {
+                color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
+                if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
                         die("Could not allocate color %d\n", i);
-                }
         }
         loaded = true;
 }
@@ -3149,22 +3142,13 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
         }
 
         if(base.mode & ATTR_BOLD) {
-                if(BETWEEN(base.fg, 0, 7)) {
-                        /* basic system colors */
-                        fg = &dc.col[base.fg + 8];
-                } else if(BETWEEN(base.fg, 16, 195)) {
-                        /* 256 colors */
-                        fg = &dc.col[base.fg + 36];
-                } else if(BETWEEN(base.fg, 232, 251)) {
-                        /* greyscale */
-                        fg = &dc.col[base.fg + 4];
-                }
                 /*
-                 * Those ranges will not be brightened:
-                 *    8 - 15 – bright system colors
-                 *    196 - 231 – highest 256 color cube
-                 *    252 - 255 – brightest colors in greyscale
+                 * change basic system colours [0-7] 
+                 * to bright system colours [8-15]
                  */
+                if(BETWEEN(base.fg, 0, 7))
+                        fg = &dc.col[base.fg + 8];
+                
                 font = &dc.bfont;
                 frcflags = FRC_BOLD;
         }