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pdf: text colour

--- a/pdf.c

+++ b/pdf.c

@@ -240,7 +240,12 @@

 static void out_fontup(void)

 {

 	if (o_m != p_m) {

+		int r = CLR_R(o_m) * 1000 / 255;

+		int g = CLR_G(o_m) * 1000 / 255;

+		int b = CLR_B(o_m) * 1000 / 255;

 		o_flush();

+		sbuf_printf(pg, "%d.%03d %d.%03d %d.%03d rg\n",

+			r / 1000, r % 100, g / 1000, g % 1000, b / 1000, b % 1000);

 		p_m = o_m;

 	}

 	if (o_pf != p_pf || o_s != p_s) {