libbase/CachedBitmap.h

   1 //
   2 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
   3 //   Foundation, Inc
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18
  19
  20 #ifndef GNASH_BITMAP_INFO_H
  21 #define GNASH_BITMAP_INFO_H
  22
  23 #include "ref_counted.h"
  24 #include "dsodefs.h"
  25
  26 namespace gnash {
  27
  28 namespace image {
  29     class GnashImage;
  30 }
  31
  32 /// A CachedBitmap is created by the renderer in a format of its choosing.
  33 //
  34 /// CachedBitmaps are generally left alone by libcore, but the BitmapData
  35 /// API provides a way of manipulating bitmaps. For this reason an image()
  36 /// function is required, which must return a GnashImage for manipulation.
  37 class DSOEXPORT CachedBitmap : public ref_counted
  38 {
  39 public:
  40
  41     CachedBitmap() {}
  42
  43     virtual ~CachedBitmap() {}
  44
  45     /// Return a GnashImage for manipulation.
  46     //
  47     /// The changes to the data must be cached before the next rendering.
  48     virtual image::GnashImage& image() = 0;
  49
  50     /// Free the memory associated with this CachedBitmap.
  51     //
  52     /// This allows ActionScript a little bit of control over memory.
  53     virtual void dispose() = 0;
  54
  55     /// Whether the CachedBitmap has been disposed.
  56     //
  57     /// A disposed CachedBitmap has no data and should not be rendered.
  58     virtual bool disposed() const = 0;
  59
  60 };
  61
  62 } // namespace gnash
  63
  64 #endif
  65
  66
  67 // Local Variables:
  68 // mode: C++
  69 // indent-tabs-mode: t
  70 // End: