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
  25 #include <qimage.h>
  26 #include <qwmatrix.h>
  27 #include <qpainter.h>
  28
  29 #include <boost/tuple/tuple.hpp>
  30
  31 using std::find_if;
  32 using std::endl;
  33
  34 namespace grfx {
  35
  36 /// Access to this class is through this static method.
  37 Image::ImagePtr QLImage::newImage()
  38 {
  39         ImagePtr ptr;
  40         ptr.reset(new QLImage);
  41         return ptr;
  42 }
  43
  44
  45 /// Return the list of loadable formats.
  46 Image::FormatList QLImage::loadableFormats()
  47 {
  48         static FormatList fmts;
  49
  50         if (!fmts.empty())
  51                 return fmts;
  52
  53         // The formats recognised by LyX
  54         Formats::const_iterator begin = formats.begin();
  55         Formats::const_iterator end   = formats.end();
  56
  57         lyxerr[Debug::GRAPHICS]
  58                 << "\nThe image loader can load the following directly:\n";
  59
  60         QStrList qt_formats = QImageIO::inputFormats();
  61
  62         QStrListIterator it(qt_formats);
  63
  64         for (; it.current(); ++it) {
  65            lyxerr[Debug::GRAPHICS] << it.current() << endl;
  66
  67                 string ext = lowercase(it.current());
  68
  69                 // special case
  70                 if (ext == "jpeg")
  71                         ext = "jpg";
  72
  73                 Formats::const_iterator fit =
  74                         find_if(begin, end, lyx::compare_memfun(&Format::extension, ext));
  75                 if (fit != end)
  76                         fmts.push_back(fit->name());
  77         }
  78
  79         lyxerr[Debug::GRAPHICS]
  80                 << "\nOf these, LyX recognises the following formats:\n";
  81
  82         FormatList::const_iterator fbegin = fmts.begin();
  83         FormatList::const_iterator fend   = fmts.end();
  84         for (FormatList::const_iterator fit = fbegin; fit != fend; ++fit) {
  85                 if (fit != fbegin)
  86                         lyxerr[Debug::GRAPHICS] << ", ";
  87                 lyxerr[Debug::GRAPHICS] << *fit;
  88         }
  89         lyxerr[Debug::GRAPHICS] << '\n' << endl;
  90
  91         return fmts;
  92 }
  93
  94
  95 QLImage::QLImage()
  96         : Image()
  97 {
  98 }
  99
 100
 101 QLImage::QLImage(QLImage const & other)
 102         : Image(other), pixmap_(other.pixmap_),
 103           xformed_pixmap_(other.xformed_pixmap_)
 104 {
 105 }
 106
 107
 108 QLImage::~QLImage()
 109 {
 110 }
 111
 112
 113 Image * QLImage::clone() const
 114 {
 115         return new QLImage(*this);
 116 }
 117
 118
 119 unsigned int QLImage::getWidth() const
 120 {
 121         return xformed_pixmap_.width();
 122 }
 123
 124
 125 unsigned int QLImage::getHeight() const
 126 {
 127         return xformed_pixmap_.height();
 128 }
 129
 130
 131 void QLImage::load(string const & filename)
 132 {
 133         if (!pixmap_.isNull()) {
 134                 lyxerr[Debug::GRAPHICS]
 135                         << "Image is loaded already!" << endl;
 136                 finishedLoading(false);
 137                 return;
 138         }
 139
 140         if (!pixmap_.load(filename.c_str())) {
 141                 lyxerr[Debug::GRAPHICS]
 142                         << "Unable to open image" << endl;
 143                 finishedLoading(false);
 144                 return;
 145         }
 146         lyxerr[Debug::GRAPHICS] << "just Loaded." << endl;
 147         xformed_pixmap_ = pixmap_;
 148         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 149                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 150         finishedLoading(true);
 151 }
 152
 153
 154 bool QLImage::setPixmap(Params const & params)
 155 {
 156         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 157                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 158         if (pixmap_.isNull() || params.display == NoDisplay)
 159                 return false;
 160
 161         lyxerr[Debug::GRAPHICS] << "setPixmap()" << endl;
 162
 163 // FIXME
 164 #if 0
 165         int color_key;
 166         switch (params.display) {
 167         case MonochromeDisplay:
 168                 color_key = FL_IMAGE_MONO;
 169                 break;
 170         case GrayscaleDisplay:
 171                 color_key = FL_IMAGE_GRAY;
 172                 break;
 173         case ColorDisplay:
 174         default: // NoDisplay cannot happen!
 175                 color_key = FL_IMAGE_RGB;
 176                 break;
 177         }
 178
 179         if (color_key != FL_IMAGE_RGB) {
 180                 flimage_convert(image_, color_key, 0);
 181         }
 182
 183         unsigned int fill = packedcolor(LColor::graphicsbg);
 184         if (fill != image_->fill_color) {
 185                 // the background color has changed.
 186                 // Note that in grayscale/monochrome images the background is
 187                 // grayed also, so this call will have no visible effect. Sorry!
 188                 flimage_replace_pixel(image_, image_->fill_color, fill);
 189                 image_->fill_color = fill;
 190         }
 191 #endif
 192
 193         return true;
 194 }
 195
 196
 197 void QLImage::clip(Params const & params)
 198 {
 199         if (xformed_pixmap_.isNull())
 200                 return;
 201
 202         if (params.bb.empty())
 203                 // No clipping is necessary.
 204                 return;
 205
 206         int const new_width  = params.bb.xr - params.bb.xl;
 207         int const new_height = params.bb.yt - params.bb.yb;
 208
 209         // No need to check if the width, height are > 0 because the
 210         // Bounding Box would be empty() in this case.
 211         if (new_width > pixmap_.width() || new_height > pixmap_.height()) {
 212                 // Bounds are invalid.
 213                 return;
 214         }
 215
 216         if (new_width == pixmap_.width() && new_height == pixmap_.height())
 217                 return;
 218
 219         int const xoffset_l = params.bb.xl;
 220         int const yoffset_t = ( pixmap_.height() > params.bb.yt ?
 221                                 pixmap_.height() - params.bb.yt : 0 );
 222
 223         xformed_pixmap_.resize(new_width, new_height);
 224         QPainter p;
 225         p.begin(&xformed_pixmap_);
 226         p.drawPixmap(0, 0, pixmap_, xoffset_l, yoffset_t, new_width, new_height);
 227         p.end();
 228 }
 229
 230
 231 void QLImage::rotate(Params const & params)
 232 {
 233         if (xformed_pixmap_.isNull())
 234                 return;
 235
 236         if (!params.angle)
 237                 return;
 238
 239         // The angle passed to flimage_rotate is the angle in one-tenth of a
 240         // degree units.
 241
 242         lyxerr[Debug::GRAPHICS] << "rotating image by " << params.angle << " degrees" << endl;
 243
 244         QWMatrix m;
 245         m.rotate(-params.angle);
 246         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 247 }
 248
 249
 250 void QLImage::scale(Params const & params)
 251 {
 252         if (xformed_pixmap_.isNull())
 253                 return;
 254
 255         unsigned int width;
 256         unsigned int height;
 257         boost::tie(width, height) = getScaledDimensions(params);
 258
 259         if (width == getWidth() && height == getHeight())
 260                 return;
 261
 262         lyxerr[Debug::GRAPHICS] << "resizing image to " << width << "(" <<
 263                 (double(width)/getWidth()) << ")," << height << "(" <<
 264                 (double(height)/getHeight()) << ")" << endl;
 265         QWMatrix m;
 266         m.scale(double(width) / getWidth(), double(height) / getHeight());
 267         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 268 }
 269
 270 } // namespace grfx