kbreakout/src/renderer.cpp

   1 /*
   2     Copyright 2007 Dmitry Suzdalev <dimsuz@gmail.com>
   3     Copyright 2007-2008 Fela Winkelmolen <fela.kde@gmail.com>
   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 2 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, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include "renderer.h"
  20 #include "settings.h"
  21
  22 #include <QPainter>
  23
  24 #include <KSvgRenderer>
  25 #include <KGameTheme>
  26 #include <kpixmapcache.h>
  27
  28 Renderer* Renderer::self()
  29 {
  30     static Renderer instance;
  31     return &instance;
  32 }
  33
  34 Renderer::Renderer()
  35 {
  36     m_renderer = new KSvgRenderer();
  37     m_cache = new KPixmapCache("kbreakout");
  38     m_cache->setCacheLimit(3*1024); // TODO: put somewhere else!!!!!!!! (also in KNetWalk!!)
  39
  40     if(!loadTheme(Settings::theme()))
  41         kDebug() << "Failed to load any game theme!";
  42 }
  43
  44 Renderer::~Renderer()
  45 {
  46     delete m_renderer;
  47     delete m_cache;
  48 }
  49
  50 bool Renderer::loadTheme(const QString& themeName)
  51 {
  52     // variable saying whether to discard old cache upon
  53     // successful new theme loading
  54     // we won't discard it if m_currentTheme is empty meaning that
  55     // this is the first time loadTheme() is called
  56     // (i.e. during startup) as we want to pick the cache from disc
  57     bool discardCache = !m_currentTheme.isEmpty();
  58
  59     if(!m_currentTheme.isEmpty() && m_currentTheme == themeName) {
  60         kDebug() << "Notice: not loading the same theme";
  61         return true; // this is not an error
  62     }
  63     KGameTheme theme;
  64     if (!theme.load(themeName))  {
  65         kDebug() << "Failed to load theme" << Settings::theme();
  66         kDebug() << "Trying to load default";
  67         if(!theme.loadDefault())
  68             return false;
  69     }
  70
  71     m_currentTheme = themeName;
  72
  73     bool res = m_renderer->load( theme.graphics() );
  74     kDebug() << "loading" << theme.graphics();
  75     if (!res) return false;
  76
  77     if (discardCache) {
  78         kDebug() << "discarding cache";
  79         m_cache->discard();
  80     }
  81     return true;
  82 }
  83
  84 QPixmap Renderer::renderedSvgElement(const QString &id, const QSize &size) const
  85 {
  86     int const w = size.width();
  87     int const h = size.height();
  88
  89     QPixmap pixmap;
  90     QString cacheName =
  91             QString("%1-%2x%3").arg(id).arg(w).arg(h);
  92     if(m_cache->find(cacheName, pixmap)) return pixmap;
  93
  94     // else
  95     kDebug() << "re-rendering pixmap" << cacheName;
  96     pixmap = QPixmap(size);
  97     pixmap.fill(Qt::transparent);
  98     QPainter p(&pixmap);
  99
 100     if (!m_renderer->elementExists(id)) {
 101         kDebug() << "Invalid elementId: " << id;
 102         return pixmap;
 103     }
 104
 105     m_renderer->render(&p, id/*, size*/);
 106     p.end();
 107     m_cache->insert(cacheName, pixmap);
 108     kDebug() << "cache size:" << m_cache->size() << "kb";
 109
 110     return pixmap;
 111 }