Ignoring unused "none" color entries in XPM files written by some broken graphics tools

CONTRIBUTORS

@@ -716,6 +716,8 @@ Sascha Volkenandt <sascha@akv-soft.de>
  for reporting a bug in cBitmap::DrawPixel(), which messed with other bitmaps'
  palettes in case the pixel coordinates were outside this bitmap
  for suggesting to allow drawing "transparent" texts
+ for suggesting to ignore unused "none" color entries in XPM files written by
+ some broken graphics tools
 
 Malcolm Caldwell <malcolm.caldwell@ntu.edu.au>
  for modifying LOF handling to allow for C-band reception

HISTORY

@@ -2879,3 +2879,5 @@ Video Disk Recorder Revision History
 - The cBitmap::DrawText() function now doesn't set any background pixels if the
   given background color is clrTransparent. This allows drawing "transparent"
   texts (suggested by Sascha Volkenandt).
+- The cBitmap::SetXpm() function now ignores unused "none" color entries, which
+  some broken graphics tools write into XPM files (suggested by Sascha Volkenandt).

osd.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: osd.c 1.50 2004/06/05 11:37:42 kls Exp $
+ * $Id: osd.c 1.51 2004/06/05 13:20:19 kls Exp $
  */
 
 #include "osd.h"
@@ -244,7 +244,7 @@ bool cBitmap::LoadXpm(const char *FileName)
   return Result;
 }
 
-bool cBitmap::SetXpm(char *Xpm[])
+bool cBitmap::SetXpm(char *Xpm[], bool IgnoreNone)
 {
   char **p = Xpm;
   int w, h, n, c;
@@ -257,10 +257,11 @@ bool cBitmap::SetXpm(char *Xpm[])
      return false;
      }
   int b = 0;
-  while (1 << (1 << b) < n)
+  while (1 << (1 << b) < (IgnoreNone ? n - 1 : n))
         b++;
   SetBpp(1 << b);
   SetSize(w, h);
+  int NoneColorIndex = MAXNUMCOLORS;
   for (int i = 0; i < n; i++) {
       const char *s = *++p;
       if (int(strlen(s)) < c) {
@@ -273,14 +274,18 @@ bool cBitmap::SetXpm(char *Xpm[])
          return false;
          }
       s = skipspace(s + 1);
-      if (strcasecmp(s, "none") == 0)
+      if (strcasecmp(s, "none") == 0) {
          s = "#00000000";
+         NoneColorIndex = i;
+         if (IgnoreNone)
+            continue;
+         }
       if (*s != '#') {
          esyslog("ERROR: unknown color code in XPM: '%c'", *s);
          return false;
          }
       tColor color = strtoul(++s, NULL, 16) | 0xFF000000;
-      SetColor(i, color);
+      SetColor((IgnoreNone && i > NoneColorIndex) ? i - 1 : i, color);
       }
   for (int y = 0; y < h; y++) {
       const char *s = *++p;
@@ -295,13 +300,17 @@ bool cBitmap::SetXpm(char *Xpm[])
                  return false;
                  }
               if (strncmp(Xpm[i + 1], s, c) == 0) {
-                 SetIndex(x, y, i);
+                 if (i == NoneColorIndex)
+                    NoneColorIndex = MAXNUMCOLORS;
+                 SetIndex(x, y, (IgnoreNone && i > NoneColorIndex) ? i - 1 : i);
                  break;
                  }
               }
           s += c;
           }
       }
+  if (NoneColorIndex < MAXNUMCOLORS && !IgnoreNone)
+     return SetXpm(Xpm, true);
   return true;
 }
 

osd.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: osd.h 1.44 2004/06/05 11:40:12 kls Exp $
+ * $Id: osd.h 1.45 2004/06/05 12:38:44 kls Exp $
  */
 
 #ifndef __OSD_H
@@ -136,9 +136,15 @@ public:
   bool LoadXpm(const char *FileName);
        ///< Calls SetXpm() with the data from the file FileName.
        ///< Returns true if the operation was successful.
-  bool SetXpm(char *Xpm[]);
+  bool SetXpm(char *Xpm[], bool IgnoreNone = false);
        ///< Sets this bitmap to the given XPM data. Any previous bitmap or
        ///< palette data will be overwritten with the new data.
+       ///< If IgnoreNone is true, a "none" color entry will be ignored.
+       ///< Only set IgnoreNone to true if you know that there is a "none"
+       ///< color entry in the XPM data and that this entry is not used!
+       ///< If SetXpm() is called with IgnoreNone set to false and the XPM
+       ///< data contains an unused "none" entry, it will be automatically
+       ///< called again with IgnoreNone set to true.
        ///< Returns true if the operation was successful.
   void SetIndex(int x, int y, tIndex Index);
        ///< Sets the index at the given coordinates to Index.