gui/qt/kde_glue_agg.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 #if GNASH_QT_VERSION == 4
  25 #include <Qt/qpixmap.h>
  26 #include <Qt/qcolor.h>
  27 #include <Qt/qicon.h>
  28 #include <Qt/Qt3Support>
  29 #else
  30 #include <qpixmap.h>
  31 #include <qcolor.h>
  32 #endif
  33 #include "kde_glue_agg.h"
  34 #include "Renderer.h"
  35 #include "Renderer_agg.h"
  36 #include "GnashException.h"
  37
  38 namespace gnash
  39 {
  40
  41 KdeAggGlue::KdeAggGlue()
  42 :
  43   _width(0),
  44   _height(0),
  45    _renderer(0)
  46 {
  47 }
  48
  49 KdeAggGlue::~KdeAggGlue()
  50 {
  51 }
  52
  53 bool
  54 KdeAggGlue::init(int /* argc */, char *** /* argv */)
  55 {
  56 //    GNASH_REPORT_FUNCTION;
  57
  58     return true;
  59 }
  60
  61
  62 void
  63 KdeAggGlue::prepDrawingArea(QWidget *drawing_area)
  64 {
  65 //    GNASH_REPORT_FUNCTION;
  66     _drawing_area = drawing_area;
  67 }
  68
  69
  70 void
  71 KdeAggGlue::initBuffer(int width, int height)
  72 {
  73     if (!_renderer) return;
  74
  75     int _bpp = 32;
  76     int depth_bytes = _bpp / 8;  // TODO: <Udo> is this correct? Gives 1 for 15 bit modes!
  77
  78     assert(_bpp % 8 == 0);
  79
  80 #define CHUNK_SIZE (100 * 100 * depth_bytes)
  81
  82     int bufsize = (width * height * depth_bytes / CHUNK_SIZE + 1) * CHUNK_SIZE;
  83
  84     _offscreenbuf.reset(new unsigned char[bufsize]);
  85
  86     // Only the AGG renderer has the function init_buffer, which is *not* part of
  87     // the renderer api. It allows us to change the renderers movie size (and buffer
  88     // address) during run-time.
  89     Renderer_agg_base * renderer =
  90       static_cast<Renderer_agg_base *>(_renderer);
  91     renderer->init_buffer(_offscreenbuf.get(), bufsize, width, height,
  92       width*((_bpp+7)/8));
  93
  94     _width = width;
  95     _height = height;
  96
  97     _validbounds.setTo(0, 0, _width, _height);
  98     _drawbounds.push_back(_validbounds);
  99
 100     _qimage.reset(new QImage(_offscreenbuf.get(), _width, _height, 32 /* bits per pixel */,
 101                              0 , 0, QImage::IgnoreEndian));
 102 }
 103
 104 void
 105 KdeAggGlue::render()
 106 {
 107     // In order to use our buffer in QT, we must copy it into a pixmap. This is
 108     // an expensive operation, but, as far as I can see, the only way to do it.
 109     QPixmap qpixmap(*_qimage);
 110
 111     for (unsigned bno=0; bno < _drawbounds.size(); bno++) {
 112        geometry::Range2d<int>& bounds = _drawbounds[bno];
 113
 114        assert ( bounds.isFinite() );
 115
 116        QPoint dest_point(bounds.getMinX(), bounds.getMinY()) ;
 117        QRect src_rect(bounds.getMinX(), bounds.getMinY(), bounds.width(),
 118                       bounds.height());
 119
 120        bitBlt (_drawing_area, dest_point, &qpixmap, src_rect, Qt::CopyROP,
 121                true /* ignore mask */ );
 122     }
 123 }
 124
 125 void
 126 KdeAggGlue::setInvalidatedRegions(const InvalidatedRanges& ranges)
 127 {
 128     _renderer->set_invalidated_regions(ranges);
 129
 130     _drawbounds.clear();
 131
 132     for (size_t rno=0; rno<ranges.size(); rno++) {
 133
 134       geometry::Range2d<int> bounds = Intersection(
 135       _renderer->world_to_pixel(ranges.getRange(rno)),
 136       _validbounds);
 137
 138       // it may happen that a particular range is out of the screen, which
 139       // will lead to bounds==null.
 140       if (bounds.isNull()) continue;
 141
 142       assert(bounds.isFinite());
 143
 144       _drawbounds.push_back(bounds);
 145
 146     }
 147 }
 148
 149
 150 Renderer*
 151 KdeAggGlue::createRenderHandler()
 152 {
 153     // QT requires the use of this pixel format...
 154     _renderer = create_Renderer_agg("BGRA32");
 155     if (! _renderer) {
 156         throw GnashException(_("Could not create AGG renderer with pixelformat BGRA32"));
 157     }
 158     return _renderer;
 159 }
 160
 161 void
 162 KdeAggGlue::resize(int width, int height)
 163 {
 164     initBuffer(width, height);
 165 }
 166
 167 // end of namespace gnash
 168 }