gui/qt/Qt4GlueAgg.cpp

   1 //
   2 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010,
   3 //   2011 Free Software 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 #ifdef HAVE_CONFIG_H
  21 #include "gnashconfig.h"
  22 #endif
  23
  24 #include "Qt4GlueAgg.h"
  25 #include "Renderer.h"
  26 #include "Renderer_agg.h"
  27 #include "GnashException.h"
  28 #include <QWidget>
  29 #include <QImage>
  30 #include <QRect>
  31
  32 namespace gnash
  33 {
  34
  35 Qt4AggGlue::Qt4AggGlue()
  36 :
  37   _width(0),
  38   _height(0),
  39   _renderer(nullptr)
  40 {
  41 }
  42
  43 Qt4AggGlue::~Qt4AggGlue()
  44 {
  45 }
  46
  47 bool
  48 Qt4AggGlue::init(int /* argc */, char *** /* argv */)
  49 {
  50     return true;
  51 }
  52
  53
  54 void
  55 Qt4AggGlue::prepDrawingArea(DrawingWidget *drawing_area)
  56 {
  57     _drawing_area = drawing_area;
  58 }
  59
  60
  61 void
  62 Qt4AggGlue::initBuffer(int width, int height)
  63 {
  64     if (!_renderer) return;
  65
  66     _width = width;
  67     _height = height;
  68
  69     int _bpp = 32;
  70     int depth_bytes = _bpp / 8;
  71
  72     assert(_bpp % 8 == 0);
  73
  74 #define CHUNK_SIZE (100 * 100 * depth_bytes)
  75
  76     int bufsize = (width * height * depth_bytes / CHUNK_SIZE + 1) * CHUNK_SIZE;
  77
  78     _offscreenbuf.reset(new unsigned char[bufsize]);
  79
  80     Renderer_agg_base * renderer =
  81       static_cast<Renderer_agg_base *>(_renderer);
  82
  83     renderer->init_buffer(_offscreenbuf.get(), bufsize, _width, _height,
  84       width*((_bpp+7)/8));
  85
  86     _image.reset(new QImage(_offscreenbuf.get(), _width, _height, QImage::Format_RGB32));
  87 }
  88
  89
  90 void
  91 Qt4AggGlue::render()
  92 {
  93     QRect r(0, 0, _width, _height);
  94     render(r);
  95 }
  96
  97
  98 void
  99 Qt4AggGlue::render(const QRect& updateRect)
 100 {
 101     QPainter p(_drawing_area);
 102
 103     p.drawImage(updateRect, *_image, updateRect);
 104     p.end();
 105 }
 106
 107
 108 Renderer*
 109 Qt4AggGlue::createRenderHandler()
 110 {
 111     _renderer = create_Renderer_agg("BGRA32");
 112
 113     if ( ! _renderer )
 114     {
 115         throw GnashException(_("Could not create AGG renderer with pixelformat ABGR32"));
 116     }
 117     return _renderer;
 118 }
 119
 120 void
 121 Qt4AggGlue::resize(int width, int height)
 122 {
 123     initBuffer(width, height);
 124 }
 125
 126 // end of namespace gnash
 127 }