diff options
Diffstat (limited to 'atari/plot/plotter.c')
| -rwxr-xr-x | atari/plot/plotter.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/atari/plot/plotter.c b/atari/plot/plotter.c index 44183d938..8359215c1 100755 --- a/atari/plot/plotter.c +++ b/atari/plot/plotter.c @@ -627,10 +627,20 @@ void rgb_to_vdi1000( unsigned char * in, unsigned short * out ) out[2] = 1000 * b + 0.5;
return;
}
+ +void vdi1000_to_rgb( unsigned short * in, unsigned char * out ) +{ + double r = ((double)in[0]/1000); /* prozentsatz red */
+ double g = ((double)in[1]/1000); /* prozentsatz green */
+ double b = ((double)in[2]/1000); /* prozentsatz blue */ + out[2] = 255 * r + 0.5;
+ out[1] = 255 * g + 0.5;
+ out[0] = 255 * b + 0.5;
+ return; +}
-
-static short web_std_colors[6] = {0, 51, 102, 153, 204, 255};
+static short web_std_colors[6] = {0, 51, 102, 153, 204, 255}; /*
Convert an RGB color into an index into the 216 colors web pallette
@@ -640,7 +650,20 @@ short rgb_to_666_index(unsigned char r, unsigned char g, unsigned char b) short ret = 0;
short i;
unsigned char rgb[3] = {r,g,b};
- unsigned char tval[3];
+ unsigned char tval[3]; + + int diff_a, diff_b, diff_c; + diff_a = abs(r-g); + diff_b = abs(r-b); + diff_c = abs(r-b); + if( diff_a < 2 && diff_b < 2 && diff_c < 2 ){ + if( (r!=0XFF) && (g!=0XFF) && (g!=0XFF) ){ + if( ((r&0xF0)>>4) != 0 ) + //printf("conv gray: %x -> %d\n", ((r&0xF0)>>4) , (OFFSET_CUST_PAL) + ((r&0xF0)>>4) ); + return( (OFFSET_CUST_PAL - OFFSET_WEB_PAL) + ((r&0xF0)>>4) ); + } + } +
/* convert each 8bit color to 6bit web color: */
for( i=0; i<3; i++) {
if(0 == rgb[i] % web_std_colors[1] ) {
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