Added cOsd::DrawScaledBitmap()

CONTRIBUTORS

@@ -3262,6 +3262,7 @@ Thomas Reufer <thomas@reufer.ch>
  for suggesting to add a note to ePlayMode in device.h that VDR itself always uses
  pmAudioVideo when replaying a recording
  for fixing a possible crash in the LCARS skin
+ for implementing cOsd::DrawScaledBitmap()
 
 Eike Sauer <EikeSauer@t-online.de>
  for reporting a problem with channels that need more than 5 TS packets for detecting

HISTORY

@@ -8331,3 +8331,6 @@ Video Disk Recorder Revision History
   "Setup/DVB/Update channels" is set to a value other than "no" or "PIDs only".
 - Fixed multiple OBSOLETE marks in channels that are not listed in the SDT in case
   "Setup/Miscellaneous/Show channel names with source" is set to "yes".
+- The new function cOsd::DrawScaledBitmap() is now used for drawing subtitles.
+  This function can be reimplemented by high level OSDs which may be able to do
+  the scaling in hardware or otherwise more efficiently (thanks to Thomas Reufer).

dvbsubtitle.c

@@ -7,7 +7,7 @@
  * Original author: Marco Schluessler <marco@lordzodiac.de>
  * With some input from the "subtitles plugin" by Pekka Virtanen <pekka.virtanen@sci.fi>
  *
- * $Id: dvbsubtitle.c 3.5 2014/02/08 12:29:13 kls Exp $
+ * $Id: dvbsubtitle.c 3.6 2015/01/04 15:46:39 kls Exp $
  */
 
 #include "dvbsubtitle.h"
@@ -1077,11 +1077,7 @@ void cDvbSubtitleBitmaps::Draw(cOsd *Osd)
   if (State() == 0 || Osd->SetAreas(areas, numAreas) == oeOk) {
      for (int i = 0; i < bitmaps.Size(); i++) {
          cBitmap *b = bitmaps[i];
-         if (Scale)
+         Osd->DrawScaledBitmap(int(round(b->X0() * osdFactorX)), int(round(b->Y0() * osdFactorY)), *b, osdFactorX, osdFactorY, AntiAlias);
-            b = b->Scaled(osdFactorX, osdFactorY, AntiAlias);
-         Osd->DrawBitmap(int(round(b->X0() * osdFactorX)), int(round(b->Y0() * osdFactorY)), *b);
-         if (b != bitmaps[i])
-            delete b;
          }
      Osd->Flush();
      }

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 3.2 2013/09/03 11:59:17 kls Exp $
+ * $Id: osd.c 3.3 2015/01/04 15:46:39 kls Exp $
  */
 
 #include "osd.h"
@@ -1917,6 +1917,16 @@ void cOsd::DrawBitmap(int x, int y, const cBitmap &Bitmap, tColor ColorFg, tColo
      }
 }
 
+void cOsd::DrawScaledBitmap(int x, int y, const cBitmap &Bitmap, double FactorX, double FactorY, bool AntiAlias)
+{
+  const cBitmap *b = &Bitmap;
+  if (!DoubleEqual(FactorX, 1.0) || !DoubleEqual(FactorY, 1.0))
+     b = b->Scaled(FactorX, FactorY, AntiAlias);
+  DrawBitmap(x, y, *b);
+  if (b != &Bitmap)
+     delete b;
+}
+
 void cOsd::DrawText(int x, int y, const char *s, tColor ColorFg, tColor ColorBg, const cFont *Font, int Width, int Height, int Alignment)
 {
   if (isTrueColor)

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 3.2 2013/09/06 12:13:47 kls Exp $
+ * $Id: osd.h 3.3 2015/01/04 15:51:03 kls Exp $
  */
 
 #ifndef __OSD_H
@@ -885,6 +885,11 @@ public:
        ///< If Overlay is true, any pixel in Bitmap that has color index 0 will
        ///< not overwrite the corresponding pixel in the target area.
        ///< If this is a true color OSD, ReplacePalette has no meaning.
+  virtual void DrawScaledBitmap(int x, int y, const cBitmap &Bitmap, double FactorX, double FactorY, bool AntiAlias = false);
+       ///< Sets the pixels in the OSD with the data from the given Bitmap, putting
+       ///< the upper left corner of the Bitmap at (x, y) and scaled by the given
+       ///< factors. If AntiAlias is true and either of the factors is greater than
+       ///< 1.0, anti-aliasing is applied.
   virtual void DrawText(int x, int y, const char *s, tColor ColorFg, tColor ColorBg, const cFont *Font, int Width = 0, int Height = 0, int Alignment = taDefault);
        ///< Draws the given string at coordinates (x, y) with the given foreground
        ///< and background color and font. If Width and Height are given, the text