Added cOsdProvider::OsdSizeChanged()

CONTRIBUTORS

@@ -3271,6 +3271,7 @@ Thomas Reufer <thomas@reufer.ch>
  for implementing cOsd::DrawScaledBitmap()
  for adding handling for DTS audio tracks to cPatPmtParser::ParsePmt()
  for adding support for PGS subtitles
+ for adding cOsdProvider::OsdSizeChanged()
 
 Eike Sauer <EikeSauer@t-online.de>
  for reporting a problem with channels that need more than 5 TS packets for detecting

HISTORY

@@ -8376,3 +8376,6 @@ Video Disk Recorder Revision History
 - Plugins can now implement the function SetMenuSortMode() in their skin objects
   derived from cSkinDisplayMenu, to get informed about the currently used sort
   mode, if applicable (suggested by Martin Schirrmacher).
+- Added cOsdProvider::OsdSizeChanged(), which plugins that implement an output device
+  can call to signal a change in the OSD that requires a redraw of the currently
+  displayed object (thanks to Thomas Reufer).

menu.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: menu.c 3.27 2015/01/15 10:31:41 kls Exp $
+ * $Id: menu.c 3.28 2015/01/15 11:14:21 kls Exp $
  */
 
 #include "menu.h"
@@ -4033,6 +4033,7 @@ cDisplayChannel::cDisplayChannel(int Number, bool Switched)
   displayChannel = Skins.Current()->DisplayChannel(withInfo);
   number = 0;
   timeout = Switched || Setup.TimeoutRequChInfo;
+  cOsdProvider::OsdSizeChanged(osdState); // just to get the current state
   positioner = NULL;
   channel = Channels.GetByNumber(Number);
   lastPresent = lastFollowing = NULL;
@@ -4118,6 +4119,10 @@ cChannel *cDisplayChannel::NextAvailableChannel(cChannel *Channel, int Direction
 
 eOSState cDisplayChannel::ProcessKey(eKeys Key)
 {
+  if (cOsdProvider::OsdSizeChanged(osdState)) {
+     delete displayChannel;
+     displayChannel = Skins.Current()->DisplayChannel(withInfo);
+     }
   cChannel *NewChannel = NULL;
   if (Key != kNone)
      lastTime.Set();

menu.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: menu.h 3.5 2013/12/25 12:06:03 kls Exp $
+ * $Id: menu.h 3.6 2015/01/15 11:12:57 kls Exp $
  */
 
 #ifndef __MENU_H
@@ -121,6 +121,7 @@ private:
   cTimeMs lastTime;
   int number;
   bool timeout;
+  int osdState;
   const cPositioner *positioner;
   cChannel *channel;
   const cEvent *lastPresent;

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 3.3 2015/01/04 15:46:39 kls Exp $
+ * $Id: osd.c 3.4 2015/01/15 11:20:56 kls Exp $
  */
 
 #include "osd.h"
@@ -1978,6 +1978,7 @@ int cOsdProvider::oldWidth = 0;
 int cOsdProvider::oldHeight = 0;
 double cOsdProvider::oldAspect = 1.0;
 cImage *cOsdProvider::images[MAXOSDIMAGES] = { NULL };
+int cOsdProvider::osdState = 0;
 
 cOsdProvider::cOsdProvider(void)
 {
@@ -2015,6 +2016,7 @@ void cOsdProvider::UpdateOsdSize(bool Force)
   int Width;
   int Height;
   double Aspect;
+  cMutexLock MutexLock(&cOsd::mutex);
   cDevice::PrimaryDevice()->GetOsdSize(Width, Height, Aspect);
   if (Width != oldWidth || Height != oldHeight || !DoubleEqual(Aspect, oldAspect) || Force) {
      Setup.OSDLeft = int(round(Width * Setup.OSDLeftP));
@@ -2032,9 +2034,18 @@ void cOsdProvider::UpdateOsdSize(bool Force)
      oldHeight = Height;
      oldAspect = Aspect;
      dsyslog("OSD size changed to %dx%d @ %g", Width, Height, Aspect);
+     osdState++;
      }
 }
 
+bool cOsdProvider::OsdSizeChanged(int &State)
+{
+  cMutexLock MutexLock(&cOsd::mutex);
+  bool Result = osdState != State;
+  State = osdState;
+  return Result;
+}
+
 bool cOsdProvider::SupportsTrueColor(void)
 {
   if (osdProvider) {

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 3.4 2015/01/14 10:50:55 kls Exp $
+ * $Id: osd.h 3.5 2015/01/15 11:23:52 kls Exp $
  */
 
 #ifndef __OSD_H
@@ -949,6 +949,7 @@ private:
   static int oldHeight;
   static double oldAspect;
   static cImage *images[MAXOSDIMAGES];
+  static int osdState;
 protected:
   virtual cOsd *CreateOsd(int Left, int Top, uint Level) = 0;
       ///< Returns a pointer to a newly created cOsd object, which will be located
@@ -985,6 +986,12 @@ public:
       ///< font sizes accordingly. If Force is true, all settings are recalculated,
       ///< even if the video resolution hasn't changed since the last call to
       ///< this function.
+  static bool OsdSizeChanged(int &State);
+      ///< Checks if the OSD size has changed and a currently displayed OSD needs to
+      ///< be redrawn. An internal reference value is incremented on every size change
+      ///< and is compared against State when calling the method.
+      ///< OsdSizeChanged() can be called with an uninitialized State to just get
+      ///< the current value of State.
   static bool SupportsTrueColor(void);
       ///< Returns true if the current OSD provider is able to handle a true color OSD.
   static int StoreImage(const cImage &Image);