qtgui/imagepreview.cpp

   1 /*
   2     This program is free software; you can redistribute it and/or modify
   3     it under the terms of the GNU General Public License as published by
   4     the Free Software Foundation; either version 2 of the License, or
   5     (at your option) any later version.
   6
   7     This program is distributed in the hope that it will be useful,
   8     but WITHOUT ANY WARRANTY; without even the implied warranty of
   9     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10     GNU General Public License for more details.
  11
  12     You should have received a copy of the GNU General Public License along
  13     with this program; if not, write to the Free Software Foundation, Inc.,
  14     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  15 */
  16
  17 #include "imagepreview.h"
  18 #include "c1cobfile.h"
  19
  20 #include "Engine.h"
  21 #include "cobFile.h"
  22
  23 #include <QPainter>
  24
  25 ImagePreview::ImagePreview(QWidget *parent): QWidget(parent) {
  26         imgdata = 0;
  27 }
  28
  29 ImagePreview::~ImagePreview() {
  30         if (imgdata) delete imgdata;
  31 }
  32
  33 void ImagePreview::onSelect(QListWidgetItem *current, QListWidgetItem *prev) {
  34         previewimg = QImage();
  35
  36         if (!current) {
  37                 update();
  38                 return;
  39         }
  40
  41         if (engine.version == 1) {
  42                 QString filename = current->toolTip();
  43                 std::ifstream cobstream(filename.toAscii(), std::ios::binary);
  44                 if (cobstream.fail()) {
  45                         return; // TODO: throw some kind of warning or something
  46                 }
  47
  48                 c1cobfile cobfile(cobstream);
  49
  50                 if (cobfile.imagewidth > 0 && cobfile.imageheight > 0) {
  51                         previewimg = QImage((uchar*)cobfile.imagedata.get(), cobfile.imagewidth, cobfile.imageheight, QImage::Format_Indexed8).mirrored();
  52                         previewimg.setNumColors(256);
  53                         unsigned char *palette = engine.getPalette();
  54                         if (palette) {
  55                                 for (unsigned int i = 0; i < 256; i++) {
  56                                         previewimg.setColor(i, QColor(palette[i*3],palette[i*3+1],palette[i*3+2]).rgb());
  57                                 }
  58                         }
  59                 }
  60         } else if (engine.version == 2) {
  61                 cobAgentBlock *b = (cobAgentBlock *)current->data(Qt::UserRole).value<void *>();
  62                 assert(b);
  63                 if (b->thumbnailwidth > 0 && b->thumbnailheight > 0) {
  64                         unsigned short *oldimgdata = b->thumbnail;
  65                         assert(b->thumbnail);
  66                         if (imgdata) delete imgdata;
  67                         imgdata = new unsigned int[b->thumbnailwidth * b->thumbnailheight];
  68
  69                         for (unsigned int i = 0; i < (unsigned int)b->thumbnailwidth * (unsigned int)b->thumbnailheight; i++) {
  70                                 unsigned int v = oldimgdata[i];
  71                                 v = swapEndianShort(v);
  72                                 unsigned int red = ((v & 0xf800) >> 8) & 0xFF;
  73                                 unsigned int green = ((v & 0x07e0) >> 3) & 0xFF;
  74                                 unsigned int blue = ((v & 0x001f) << 3) & 0xFF;
  75                                 imgdata[i] = (red << 16) + (green << 8) + blue;
  76                         }
  77
  78                         previewimg = QImage((uchar*)imgdata, b->thumbnailwidth, b->thumbnailheight, QImage::Format_RGB32);
  79                 }
  80         }
  81
  82         update();
  83 }
  84
  85 void ImagePreview::paintEvent(QPaintEvent *event) {
  86         if (previewimg.width() > 0) {
  87                 QPainter painter(this);
  88                 painter.drawImage(QPoint(width()/2 - previewimg.width()/2,height()/2 - previewimg.height()/2), previewimg);
  89         }
  90 }