src/frontends/qt2/QLImage.C

   1 /**
   2  * \file QLImage.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Angus Leeming
   7  * \author John Levon
   8  *
   9  * Full author contact details are available in file CREDITS
  10  */
  11
  12 #include <config.h>
  13
  14
  15 #include "QLImage.h"
  16 #include "graphics/GraphicsParams.h"
  17 #include "format.h"
  18 #include "debug.h"
  19 #include "support/LAssert.h"
  20 #include "support/lyxfunctional.h"  // compare_memfun
  21 #include "qt_helpers.h"
  22
  23 #include <qimage.h>
  24 #include <qwmatrix.h>
  25 #include <qpainter.h>
  26
  27 #include <boost/tuple/tuple.hpp>
  28
  29 using std::find_if;
  30 using std::endl;
  31
  32 namespace grfx {
  33
  34 /// Access to this class is through this static method.
  35 Image::ImagePtr QLImage::newImage()
  36 {
  37         ImagePtr ptr;
  38         ptr.reset(new QLImage);
  39         return ptr;
  40 }
  41
  42
  43 /// Return the list of loadable formats.
  44 Image::FormatList QLImage::loadableFormats()
  45 {
  46         static FormatList fmts;
  47
  48         if (!fmts.empty())
  49                 return fmts;
  50
  51         // The formats recognised by LyX
  52         Formats::const_iterator begin = formats.begin();
  53         Formats::const_iterator end   = formats.end();
  54
  55         lyxerr[Debug::GRAPHICS]
  56                 << "\nThe image loader can load the following directly:\n";
  57
  58         QStrList qt_formats = QImageIO::inputFormats();
  59
  60         QStrListIterator it(qt_formats);
  61
  62         for (; it.current(); ++it) {
  63            lyxerr[Debug::GRAPHICS] << it.current() << endl;
  64
  65                 string ext = lowercase(it.current());
  66
  67                 // special case
  68                 if (ext == "jpeg")
  69                         ext = "jpg";
  70
  71                 Formats::const_iterator fit =
  72                         find_if(begin, end, lyx::compare_memfun(&Format::extension, ext));
  73                 if (fit != end)
  74                         fmts.push_back(fit->name());
  75         }
  76
  77         lyxerr[Debug::GRAPHICS]
  78                 << "\nOf these, LyX recognises the following formats:\n";
  79
  80         FormatList::const_iterator fbegin = fmts.begin();
  81         FormatList::const_iterator fend   = fmts.end();
  82         for (FormatList::const_iterator fit = fbegin; fit != fend; ++fit) {
  83                 if (fit != fbegin)
  84                         lyxerr[Debug::GRAPHICS] << ", ";
  85                 lyxerr[Debug::GRAPHICS] << *fit;
  86         }
  87         lyxerr[Debug::GRAPHICS] << '\n' << endl;
  88
  89         return fmts;
  90 }
  91
  92
  93 QLImage::QLImage()
  94         : Image()
  95 {
  96 }
  97
  98
  99 QLImage::QLImage(QLImage const & other)
 100         : Image(other), pixmap_(other.pixmap_),
 101           xformed_pixmap_(other.xformed_pixmap_)
 102 {
 103 }
 104
 105
 106 QLImage::~QLImage()
 107 {
 108 }
 109
 110
 111 Image * QLImage::clone() const
 112 {
 113         return new QLImage(*this);
 114 }
 115
 116
 117 unsigned int QLImage::getWidth() const
 118 {
 119         return xformed_pixmap_.width();
 120 }
 121
 122
 123 unsigned int QLImage::getHeight() const
 124 {
 125         return xformed_pixmap_.height();
 126 }
 127
 128
 129 void QLImage::load(string const & filename)
 130 {
 131         if (!pixmap_.isNull()) {
 132                 lyxerr[Debug::GRAPHICS]
 133                         << "Image is loaded already!" << endl;
 134                 finishedLoading(false);
 135                 return;
 136         }
 137
 138         if (!pixmap_.load(toqstr(filename))) {
 139                 lyxerr[Debug::GRAPHICS]
 140                         << "Unable to open image" << endl;
 141                 finishedLoading(false);
 142                 return;
 143         }
 144         lyxerr[Debug::GRAPHICS] << "just Loaded." << endl;
 145         xformed_pixmap_ = pixmap_;
 146         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 147                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 148         finishedLoading(true);
 149 }
 150
 151
 152 bool QLImage::setPixmap(Params const & params)
 153 {
 154         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 155                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 156         if (pixmap_.isNull() || params.display == NoDisplay)
 157                 return false;
 158
 159         lyxerr[Debug::GRAPHICS] << "setPixmap()" << endl;
 160
 161         // FIXME: it's a fake kind of grayscale !
 162
 163         switch (params.display) {
 164                 case GrayscaleDisplay:
 165                 case MonochromeDisplay: {
 166                         QImage i(xformed_pixmap_.convertToImage());
 167                         xformed_pixmap_.convertFromImage(i, QPixmap::Mono);
 168                         break;
 169                 }
 170
 171                 default:
 172                         break;
 173         }
 174 // FIXME
 175 #if 0
 176         unsigned int fill = packedcolor(LColor::graphicsbg);
 177         if (fill != image_->fill_color) {
 178                 // the background color has changed.
 179                 // Note that in grayscale/monochrome images the background is
 180                 // grayed also, so this call will have no visible effect. Sorry!
 181                 flimage_replace_pixel(image_, image_->fill_color, fill);
 182                 image_->fill_color = fill;
 183         }
 184 #endif
 185
 186         return true;
 187 }
 188
 189
 190 void QLImage::clip(Params const & params)
 191 {
 192         if (xformed_pixmap_.isNull())
 193                 return;
 194
 195         if (params.bb.empty())
 196                 // No clipping is necessary.
 197                 return;
 198
 199         int const new_width  = params.bb.xr - params.bb.xl;
 200         int const new_height = params.bb.yt - params.bb.yb;
 201
 202         // No need to check if the width, height are > 0 because the
 203         // Bounding Box would be empty() in this case.
 204         if (new_width > pixmap_.width() || new_height > pixmap_.height()) {
 205                 // Bounds are invalid.
 206                 return;
 207         }
 208
 209         if (new_width == pixmap_.width() && new_height == pixmap_.height())
 210                 return;
 211
 212         int const xoffset_l = params.bb.xl;
 213         int const yoffset_t = (pixmap_.height() > params.bb.yt ?
 214                                 pixmap_.height() - params.bb.yt : 0);
 215
 216         xformed_pixmap_.resize(new_width, new_height);
 217         QPainter p;
 218         p.begin(&xformed_pixmap_);
 219         p.drawPixmap(0, 0, pixmap_, xoffset_l, yoffset_t, new_width, new_height);
 220         p.end();
 221 }
 222
 223
 224 void QLImage::rotate(Params const & params)
 225 {
 226         if (xformed_pixmap_.isNull())
 227                 return;
 228
 229         if (!params.angle)
 230                 return;
 231
 232         // The angle passed to flimage_rotate is the angle in one-tenth of a
 233         // degree units.
 234
 235         lyxerr[Debug::GRAPHICS] << "rotating image by " << params.angle << " degrees" << endl;
 236
 237         QWMatrix m;
 238         m.rotate(-params.angle);
 239         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 240 }
 241
 242
 243 void QLImage::scale(Params const & params)
 244 {
 245         if (xformed_pixmap_.isNull())
 246                 return;
 247
 248         unsigned int width;
 249         unsigned int height;
 250         boost::tie(width, height) = getScaledDimensions(params);
 251
 252         if (width == getWidth() && height == getHeight())
 253                 return;
 254
 255         lyxerr[Debug::GRAPHICS] << "resizing image to " << width << '('
 256                                 << (double(width)/getWidth()) << "),"
 257                                 << height << '('
 258                                 << (double(height)/getHeight()) << ')' << endl;
 259         QWMatrix m;
 260         m.scale(double(width) / getWidth(), double(height) / getHeight());
 261         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 262 }
 263
 264 } // namespace grfx