Implement new logo standard

[xboard.git] / xaw / xboard.c

diff --git a/xaw/xboard.c b/xaw/xboard.c
index bed61e5..ca3c380 100644 (file)
--- a/xaw/xboard.c
+++ b/xaw/xboard.c
@@ -2492,6 +2492,19 @@ FrameDelay (int time)
 
 #endif
 
+static int
+FindLogo (char *place, char *name, char *buf)
+{   // check if file exists in given place
+    FILE *f;
+    if(!place) return 0;
+    snprintf(buf, MSG_SIZ, "%s/%s.png", place, name);
+    if(*place && strcmp(place, ".") && (f = fopen(buf, "r")) ) {
+       fclose(f);
+       return 1;
+    }
+    return 0;
+}
+
 static void
 LoadLogo (ChessProgramState *cps, int n, Boolean ics)
 {
@@ -2502,7 +2515,11 @@ LoadLogo (ChessProgramState *cps, int n, Boolean ics)
        if(ics) { // [HGM] logo: in ICS mode second can be used for ICS
            sprintf(buf, "%s/%s.png", appData.logoDir, appData.icsHost);
        } else if(appData.logoDir && appData.logoDir[0]) {
-           sprintf(buf, "%s/%s.png", appData.logoDir, cps->tidy);
+       } else { // engine; cascade
+           if(!FindLogo(appData.logoDir, cps->tidy, buf) &&   // first try user log folder
+              !FindLogo(appData.directory[n], "logo", buf) && // then engine directory
+              !FindLogo("/usr/localshare/games/plugins/logos", cps->tidy, buf) ) // then system folders
+               FindLogo("/usr/share/games/plugins/logos", cps->tidy, buf);
        }
     }
     if(logoName[0])