src/frontends/qt2/QLImage.C

   1 /*
   2  * \file QLImage.C
   3  * Copyright 2002 the LyX Team
   4  * Read the file COPYING
   5  *
   6  * \author Angus Leeming, a.leeming@ic.ac.uk
   7  * \author John Levon <moz@compsoc.man.ac.uk>
   8  */
   9
  10 #include <config.h>
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "QLImage.h"
  17 #include "graphics/GraphicsParams.h"
  18 #include "converter.h"
  19 #include "debug.h"
  20 #include "support/LAssert.h"
  21 #include "support/lyxfunctional.h"  // compare_memfun
  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() << std::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' << std::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 {
 102 }
 103
 104
 105 QLImage::~QLImage()
 106 {
 107 }
 108
 109
 110 Image * QLImage::clone() const
 111 {
 112         return new QLImage(*this);
 113 }
 114
 115
 116 unsigned int QLImage::getWidth() const
 117 {
 118         return pixmap_.width();
 119 }
 120
 121
 122 unsigned int QLImage::getHeight() const
 123 {
 124         return pixmap_.height();
 125 }
 126
 127
 128 void QLImage::load(string const & filename)
 129 {
 130         if (!pixmap_.isNull()) {
 131                 lyxerr[Debug::GRAPHICS]
 132                         << "Image is loaded already!" << std::endl;
 133                 finishedLoading(false);
 134                 return;
 135         }
 136
 137         if (!pixmap_.load(filename.c_str())) {
 138                 lyxerr[Debug::GRAPHICS]
 139                         << "Unable to open image" << std::endl;
 140                 finishedLoading(false);
 141                 return;
 142         }
 143         finishedLoading(true);
 144 }
 145
 146
 147 bool QLImage::setPixmap(Params const & params)
 148 {
 149         if (pixmap_.isNull() || params.display == NoDisplay)
 150                 return false;
 151
 152 // FIXME
 153 #if 0
 154         int color_key;
 155         switch (params.display) {
 156         case MonochromeDisplay:
 157                 color_key = FL_IMAGE_MONO;
 158                 break;
 159         case GrayscaleDisplay:
 160                 color_key = FL_IMAGE_GRAY;
 161                 break;
 162         case ColorDisplay:
 163         default: // NoDisplay cannot happen!
 164                 color_key = FL_IMAGE_RGB;
 165                 break;
 166         }
 167
 168         if (color_key != FL_IMAGE_RGB) {
 169                 flimage_convert(image_, color_key, 0);
 170         }
 171
 172         unsigned int fill = packedcolor(LColor::graphicsbg);
 173         if (fill != image_->fill_color) {
 174                 // the background color has changed.
 175                 // Note that in grayscale/monochrome images the background is
 176                 // grayed also, so this call will have no visible effect. Sorry!
 177                 flimage_replace_pixel(image_, image_->fill_color, fill);
 178                 image_->fill_color = fill;
 179         }
 180 #endif
 181
 182         xformed_pixmap_ = pixmap_;
 183         return true;
 184 }
 185
 186
 187 void QLImage::clip(Params const & params)
 188 {
 189         if (pixmap_.isNull())
 190                 return;
 191
 192         if (params.bb.empty())
 193                 // No clipping is necessary.
 194                 return;
 195
 196         int const new_width  = params.bb.xr - params.bb.xl;
 197         int const new_height = params.bb.yt - params.bb.yb;
 198
 199         // No need to check if the width, height are > 0 because the
 200         // Bounding Box would be empty() in this case.
 201         if (new_width > pixmap_.width() || new_height > pixmap_.height()) {
 202                 // Bounds are invalid.
 203                 return;
 204         }
 205
 206         if (new_width == pixmap_.width() && new_height == pixmap_.height())
 207                 return;
 208
 209         int const xoffset_l = std::max(0, params.bb.xl);
 210         int const yoffset_t = std::max(0, pixmap_.height() - params.bb.yt);
 211
 212         xformed_pixmap_.resize(new_width, new_height);
 213         QPainter p;
 214         p.begin(&xformed_pixmap_);
 215         p.drawPixmap(0, 0, pixmap_, xoffset_l, yoffset_t, new_width, new_height);
 216         p.end();
 217 }
 218
 219
 220 void QLImage::rotate(Params const & params)
 221 {
 222         if (xformed_pixmap_.isNull())
 223                 return;
 224
 225         if (!params.angle)
 226                 return;
 227
 228         // The angle passed to flimage_rotate is the angle in one-tenth of a
 229         // degree units.
 230
 231         QWMatrix m;
 232         m.rotate(params.angle / 10.0);
 233         xformed_pixmap_.xForm(m);
 234 }
 235
 236
 237 void QLImage::scale(Params const & params)
 238 {
 239         if (xformed_pixmap_.isNull())
 240                 return;
 241
 242         unsigned int width;
 243         unsigned int height;
 244         boost::tie(width, height) = getScaledDimensions(params);
 245
 246         if (width == getWidth() && height == getHeight())
 247                 return;
 248
 249         xformed_pixmap_.resize(width, height);
 250 }
 251
 252 } // namespace grfx