Added support for 8bit displays, having big problems with transparent plots ( snapshot of background isn't always taken from correct position, maybe a bug in fvdi)

svn path=/trunk/netsurf/; revision=13359

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] ) {