Fixed reusing OSD in cDvbSpuDecoder

1 files changed, 23 insertions, 5 deletions

diff --git a/dvbspu.c b/dvbspu.c
index 69611392..3c17e563 100644
--- a/dvbspu.c
+++ b/dvbspu.c
@@ -8,7 +8,7 @@
  *
  * parts of this file are derived from the OMS program.
  *
- * $Id: dvbspu.c 1.8 2004/11/06 11:50:13 kls Exp $
+ * $Id: dvbspu.c 1.9 2005/01/02 15:27:07 kls Exp $
  */
 
 #include <assert.h>
@@ -349,6 +349,20 @@ sDvbSpuRect cDvbSpuDecoder::CalcAreaSize(sDvbSpuRect fgsize, cBitmap *fgbmp, sDv
     return size;
 }
 
+static bool OsdMatchesArea(cOsd *osd, tArea &area)
+{
+  cBitmap *bmp = osd->GetBitmap(0);
+  if (!bmp)
+     return false;
+  if (bmp->Bpp() != area.bpp)
+     return false;
+  if (bmp->X0() != area.x1 || bmp->Y0() != area.y1)
+     return false;
+  if (bmp->Width() != area.Width() || bmp->Height() != area.Height())
+     return false;
+  return true;
+}
+
 void cDvbSpuDecoder::Draw(void)
 {
     if (!spubmp) {
@@ -386,12 +400,16 @@ void cDvbSpuDecoder::Draw(void)
        }
 
     if (bg || fg) {
+        int x2 = areaSize.x2;
+        while ((x2 - areaSize.x1 + 1) & 0x03)
+              x2++;
+        tArea Area = { areaSize.x1, areaSize.y1, x2, areaSize.y2, (fg && bg) ? 4 : 2 };
+        if (osd && !OsdMatchesArea(osd, Area)) {
+           delete osd;
+           osd = NULL;
+           }
         if (osd == NULL) {
            osd = cOsdProvider::NewOsd(0, 0);
-           int x2 = areaSize.x2;
-           while ((x2 - areaSize.x1 + 1) & 0x03)
-                 x2++;
-           tArea Area = { areaSize.x1, areaSize.y1, x2, areaSize.y2, (fg && bg) ? 4 : 2 };
            osd->SetAreas(&Area, 1);
            }