librender/GnashTexture.h

   1 // GnashTexture.h: GnashImage class used for OpenGL rendering
   2 //
   3 //   Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012
   4 //   Free Software Foundation, Inc.
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 3 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19 //
  20
  21 #ifndef GNASH_GNASHTEXTURE_H
  22 #define GNASH_GNASHTEXTURE_H
  23
  24 #include "GnashImage.h"
  25 #include <boost/shared_ptr.hpp>
  26
  27 namespace gnash {
  28
  29 /// Texture flags
  30 enum {
  31     GNASH_TEXTURE_VAAPI = 1 << 0
  32 };
  33
  34 /// OpenGL texture format
  35 class DSOEXPORT GnashTextureFormat {
  36     unsigned int        _internal_format;
  37     unsigned int        _format;
  38
  39 public:
  40     GnashTextureFormat(image::ImageType type);
  41
  42     /// Return GL internal format
  43     unsigned int internal_format() const
  44         { return _internal_format; }
  45
  46     /// Return GL format
  47     unsigned int format() const
  48         { return _format; }
  49 };
  50
  51 /// OpenGL texture abstraction
  52 class DSOEXPORT GnashTexture {
  53     unsigned int        _width;
  54     unsigned int        _height;
  55     unsigned int        _texture;
  56     GnashTextureFormat  _format;
  57
  58     /// OpenGL texture state
  59     struct TextureState {
  60         unsigned int    old_texture;
  61         unsigned int    was_enabled : 1;
  62         unsigned int    was_bound   : 1;
  63     }                   _texture_state;
  64
  65 protected:
  66     unsigned int        _flags;
  67
  68 private:
  69     bool init();
  70
  71 public:
  72     GnashTexture(unsigned int width, unsigned int height,
  73             image::ImageType type);
  74     virtual ~GnashTexture();
  75
  76     /// Return texture flags
  77     unsigned int flags() const
  78         { return _flags; }
  79
  80     /// Return texture width
  81     unsigned int width() const
  82         { return _width; }
  83
  84     /// Return texture height
  85     unsigned int height() const
  86         { return _height; }
  87
  88     /// Return GL texture
  89     unsigned int texture() const
  90         { return _texture; }
  91
  92     /// Return GL internal format
  93     unsigned int internal_format() const
  94         { return _format.internal_format(); }
  95
  96     /// Return GL format
  97     unsigned int format() const
  98         { return _format.format(); }
  99
 100     /// Bind texture to a texturing target
 101     bool bind();
 102
 103     /// Release texture
 104     void release();
 105
 106     /// Copy texture data from a buffer.
 107     //
 108     /// Note that this buffer MUST have the same _pitch, or unexpected things
 109     /// will happen. In general, it is only safe to copy from another GnashImage
 110     /// (or derivative thereof) or unexpected things will happen.
 111     ///
 112     /// @param data buffer to copy data from.
 113     void update(const boost::uint8_t *data);
 114 };
 115
 116 } // gnash namespace
 117
 118 #endif /* GNASH_GNASHTEXTURE_H */