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Overview
| Comment: | I change the branch colour algorithm, for another one I can understand better.
No HSV magic; simply few combinations of RGB values based on hash. This
algorithm should give either different or equal colours, and not similar colours.
This way I think the hash differences are more likely to give different colours. I had the feeling that we were getting too often too similar colours for our branches, but I can't prove that mathematically. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | annotate_links |
| Files: | files | file ages | folders |
| SHA1: |
243d99d128f35ce35bd26177830fbe91 |
| User & Date: | viriketo 2012-04-22 09:50:15 |
Context
|
2012-04-22
| ||
| 09:56 | Fix a comment in my previous commit. (check-in: 515e7fa0 user: viriketo tags: annotate_links) | |
| 09:50 |
I change the branch colour algorithm, for another one I can understand better.
No HSV magic; simply few combinations of RGB values based on hash. This
algorithm should give either different or equal colours, and not similar colours.
This way I think the hash differences are more likely to give different colours. I had the feeling that we were getting too often too similar colours for our branches, but I can't prove that mathematically. (check-in: 243d99d1 user: viriketo tags: annotate_links) | |
|
2012-04-05
| ||
| 14:31 |
Made 'fossil commit' detect if the editor changed the file. If the editor did
not change the file, ask confirmation, as if it was an empty comment.
I think svn behaves this way. (check-in: d2a733be user: viriketo tags: annotate_links) | |
Changes
Changes to src/timeline.c.
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/*
** Hash a string and use the hash to determine a background color.
*/
char *hash_color(const char *z){
int i; /* Loop counter */
unsigned int h = 0; /* Hash on the branch name */
int r, g, b; /* Values for red, green, and blue */
int h1, h2, h3, h4; /* Elements of the hash value */
int mx, mn; /* Components of HSV */
static char zColor[10]; /* The resulting color */
static int ix[2] = {0,0}; /* Color chooser parameters */
if( ix[0]==0 ){
if( db_get_boolean("white-foreground", 0) ){
ix[0] = 140;
ix[1] = 40;
}else{
ix[0] = 216;
ix[1] = 16;
}
}
for(i=0; z[i]; i++ ){
h = (h<<11) ^ (h<<1) ^ (h>>3) ^ z[i];
}
h1 = h % 6; h /= 6;
h3 = h % 30; h /= 30;
h4 = h % 40; h /= 40;
mx = ix[0] - h3;
mn = mx - h4 - ix[1];
h2 = (h%(mx - mn)) + mn;
switch( h1 ){
case 0: r = mx; g = h2, b = mn; break;
case 1: r = h2; g = mx, b = mn; break;
case 2: r = mn; g = mx, b = h2; break;
case 3: r = mn; g = h2, b = mx; break;
case 4: r = h2; g = mn, b = mx; break;
default: r = mx; g = mn, b = h2; break;
}
sqlite3_snprintf(8, zColor, "#%02x%02x%02x", r,g,b);
return zColor;
}
/*
** COMMAND: test-hash-color
|
< < > > | > > < > | < < < < < | < > | > > > | | < > | | < > | | | < < < < |
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/*
** Hash a string and use the hash to determine a background color.
*/
char *hash_color(const char *z){
int i; /* Loop counter */
unsigned int h = 0; /* Hash on the branch name */
int r, g, b; /* Values for red, green, and blue */
static char zColor[10]; /* The resulting color */
static int whitefg = -1;
int cpc = 4; /* colours per component */
int cfactor = 128/cpc; /* Factor so n*cpc < 128 */
int cmin = cfactor - 1; /* Factor so the max component is 127
and the min is different than the bg */
if( whitefg = -1 )
whitefg = db_get_boolean("white-foreground", 0);
/* Calculate the hash based on the branch name */
for( i=0; z[i]; i++ ){
h = (h<<11) ^ (h<<1) ^ (h>>3) ^ z[i];
}
/* 4 different random values per component, between 31 and 127 */
r = cmin + (h % cpc) * cfactor; h /= cpc;
g = cmin + (h % cpc) * cfactor; h /= cpc;
b = cmin + (h % cpc) * cfactor; h /= cpc;
/* In case of blackfg, get the inverse effect */
if( !whitefg )
{
r = 255 - r;
g = 255 - g;
b = 255 - b;
}
sqlite3_snprintf(8, zColor, "#%02x%02x%02x", r,g,b);
return zColor;
}
/*
** COMMAND: test-hash-color
|