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 #ifdef __GNUG__
  15 #pragma implementation
  16 #endif
  17
  18 #include "QLImage.h"
  19 #include "graphics/GraphicsParams.h"
  20 #include "converter.h"
  21 #include "debug.h"
  22 #include "support/LAssert.h"
  23 #include "support/lyxfunctional.h"  // compare_memfun
  24 #include "qt_helpers.h"
  25
  26 #include <qimage.h>
  27 #include <qwmatrix.h>
  28 #include <qpainter.h>
  29
  30 #include <boost/tuple/tuple.hpp>
  31
  32 using std::find_if;
  33 using std::endl;
  34
  35 namespace grfx {
  36
  37 /// Access to this class is through this static method.
  38 Image::ImagePtr QLImage::newImage()
  39 {
  40         ImagePtr ptr;
  41         ptr.reset(new QLImage);
  42         return ptr;
  43 }
  44
  45
  46 /// Return the list of loadable formats.
  47 Image::FormatList QLImage::loadableFormats()
  48 {
  49         static FormatList fmts;
  50
  51         if (!fmts.empty())
  52                 return fmts;
  53
  54         // The formats recognised by LyX
  55         Formats::const_iterator begin = formats.begin();
  56         Formats::const_iterator end   = formats.end();
  57
  58         lyxerr[Debug::GRAPHICS]
  59                 << "\nThe image loader can load the following directly:\n";
  60
  61         QStrList qt_formats = QImageIO::inputFormats();
  62
  63         QStrListIterator it(qt_formats);
  64
  65         for (; it.current(); ++it) {
  66            lyxerr[Debug::GRAPHICS] << it.current() << endl;
  67
  68                 string ext = lowercase(it.current());
  69
  70                 // special case
  71                 if (ext == "jpeg")
  72                         ext = "jpg";
  73
  74                 Formats::const_iterator fit =
  75                         find_if(begin, end, lyx::compare_memfun(&Format::extension, ext));
  76                 if (fit != end)
  77                         fmts.push_back(fit->name());
  78         }
  79
  80         lyxerr[Debug::GRAPHICS]
  81                 << "\nOf these, LyX recognises the following formats:\n";
  82
  83         FormatList::const_iterator fbegin = fmts.begin();
  84         FormatList::const_iterator fend   = fmts.end();
  85         for (FormatList::const_iterator fit = fbegin; fit != fend; ++fit) {
  86                 if (fit != fbegin)
  87                         lyxerr[Debug::GRAPHICS] << ", ";
  88                 lyxerr[Debug::GRAPHICS] << *fit;
  89         }
  90         lyxerr[Debug::GRAPHICS] << '\n' << endl;
  91
  92         return fmts;
  93 }
  94
  95
  96 QLImage::QLImage()
  97         : Image()
  98 {
  99 }
 100
 101
 102 QLImage::QLImage(QLImage const & other)
 103         : Image(other), pixmap_(other.pixmap_),
 104           xformed_pixmap_(other.xformed_pixmap_)
 105 {
 106 }
 107
 108
 109 QLImage::~QLImage()
 110 {
 111 }
 112
 113
 114 Image * QLImage::clone() const
 115 {
 116         return new QLImage(*this);
 117 }
 118
 119
 120 unsigned int QLImage::getWidth() const
 121 {
 122         return xformed_pixmap_.width();
 123 }
 124
 125
 126 unsigned int QLImage::getHeight() const
 127 {
 128         return xformed_pixmap_.height();
 129 }
 130
 131
 132 void QLImage::load(string const & filename)
 133 {
 134         if (!pixmap_.isNull()) {
 135                 lyxerr[Debug::GRAPHICS]
 136                         << "Image is loaded already!" << endl;
 137                 finishedLoading(false);
 138                 return;
 139         }
 140
 141         if (!pixmap_.load(toqstr(filename))) {
 142                 lyxerr[Debug::GRAPHICS]
 143                         << "Unable to open image" << endl;
 144                 finishedLoading(false);
 145                 return;
 146         }
 147         lyxerr[Debug::GRAPHICS] << "just Loaded." << endl;
 148         xformed_pixmap_ = pixmap_;
 149         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 150                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 151         finishedLoading(true);
 152 }
 153
 154
 155 bool QLImage::setPixmap(Params const & params)
 156 {
 157         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 158                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 159         if (pixmap_.isNull() || params.display == NoDisplay)
 160                 return false;
 161
 162         lyxerr[Debug::GRAPHICS] << "setPixmap()" << endl;
 163
 164         // FIXME: it's a fake kind of grayscale !
 165
 166         switch (params.display) {
 167                 case GrayscaleDisplay:
 168                 case MonochromeDisplay: {
 169                         QImage i(xformed_pixmap_.convertToImage());
 170                         xformed_pixmap_.convertFromImage(i, QPixmap::Mono);
 171                         break;
 172                 }
 173
 174                 default:
 175                         break;
 176         }
 177 // FIXME
 178 #if 0
 179         unsigned int fill = packedcolor(LColor::graphicsbg);
 180         if (fill != image_->fill_color) {
 181                 // the background color has changed.
 182                 // Note that in grayscale/monochrome images the background is
 183                 // grayed also, so this call will have no visible effect. Sorry!
 184                 flimage_replace_pixel(image_, image_->fill_color, fill);
 185                 image_->fill_color = fill;
 186         }
 187 #endif
 188
 189         return true;
 190 }
 191
 192
 193 void QLImage::clip(Params const & params)
 194 {
 195         if (xformed_pixmap_.isNull())
 196                 return;
 197
 198         if (params.bb.empty())
 199                 // No clipping is necessary.
 200                 return;
 201
 202         int const new_width  = params.bb.xr - params.bb.xl;
 203         int const new_height = params.bb.yt - params.bb.yb;
 204
 205         // No need to check if the width, height are > 0 because the
 206         // Bounding Box would be empty() in this case.
 207         if (new_width > pixmap_.width() || new_height > pixmap_.height()) {
 208                 // Bounds are invalid.
 209                 return;
 210         }
 211
 212         if (new_width == pixmap_.width() && new_height == pixmap_.height())
 213                 return;
 214
 215         int const xoffset_l = params.bb.xl;
 216         int const yoffset_t = (pixmap_.height() > params.bb.yt ?
 217                                 pixmap_.height() - params.bb.yt : 0);
 218
 219         xformed_pixmap_.resize(new_width, new_height);
 220         QPainter p;
 221         p.begin(&xformed_pixmap_);
 222         p.drawPixmap(0, 0, pixmap_, xoffset_l, yoffset_t, new_width, new_height);
 223         p.end();
 224 }
 225
 226
 227 void QLImage::rotate(Params const & params)
 228 {
 229         if (xformed_pixmap_.isNull())
 230                 return;
 231
 232         if (!params.angle)
 233                 return;
 234
 235         // The angle passed to flimage_rotate is the angle in one-tenth of a
 236         // degree units.
 237
 238         lyxerr[Debug::GRAPHICS] << "rotating image by " << params.angle << " degrees" << endl;
 239
 240         QWMatrix m;
 241         m.rotate(-params.angle);
 242         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 243 }
 244
 245
 246 void QLImage::scale(Params const & params)
 247 {
 248         if (xformed_pixmap_.isNull())
 249                 return;
 250
 251         unsigned int width;
 252         unsigned int height;
 253         boost::tie(width, height) = getScaledDimensions(params);
 254
 255         if (width == getWidth() && height == getHeight())
 256                 return;
 257
 258         lyxerr[Debug::GRAPHICS] << "resizing image to " << width << '('
 259                                 << (double(width)/getWidth()) << "),"
 260                                 << height << '('
 261                                 << (double(height)/getHeight()) << ')' << endl;
 262         QWMatrix m;
 263         m.scale(double(width) / getWidth(), double(height) / getHeight());
 264         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 265 }
 266
 267 } // namespace grfx