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() << 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_), xformed_pixmap_(other.xformed_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 xformed_pixmap_.width();
 119 }
 120
 121
 122 unsigned int QLImage::getHeight() const
 123 {
 124         return xformed_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!" << endl;
 133                 finishedLoading(false);
 134                 return;
 135         }
 136
 137         if (!pixmap_.load(filename.c_str())) {
 138                 lyxerr[Debug::GRAPHICS]
 139                         << "Unable to open image" << endl;
 140                 finishedLoading(false);
 141                 return;
 142         }
 143         lyxerr[Debug::GRAPHICS] << "just Loaded." << endl;
 144         xformed_pixmap_ = pixmap_;
 145         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 146                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 147         finishedLoading(true);
 148 }
 149
 150
 151 bool QLImage::setPixmap(Params const & params)
 152 {
 153         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 154                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 155         if (pixmap_.isNull() || params.display == NoDisplay)
 156                 return false;
 157
 158         lyxerr[Debug::GRAPHICS] << "setPixmap()" << endl;
 159
 160 // FIXME
 161 #if 0
 162         int color_key;
 163         switch (params.display) {
 164         case MonochromeDisplay:
 165                 color_key = FL_IMAGE_MONO;
 166                 break;
 167         case GrayscaleDisplay:
 168                 color_key = FL_IMAGE_GRAY;
 169                 break;
 170         case ColorDisplay:
 171         default: // NoDisplay cannot happen!
 172                 color_key = FL_IMAGE_RGB;
 173                 break;
 174         }
 175
 176         if (color_key != FL_IMAGE_RGB) {
 177                 flimage_convert(image_, color_key, 0);
 178         }
 179
 180         unsigned int fill = packedcolor(LColor::graphicsbg);
 181         if (fill != image_->fill_color) {
 182                 // the background color has changed.
 183                 // Note that in grayscale/monochrome images the background is
 184                 // grayed also, so this call will have no visible effect. Sorry!
 185                 flimage_replace_pixel(image_, image_->fill_color, fill);
 186                 image_->fill_color = fill;
 187         }
 188 #endif
 189
 190         return true;
 191 }
 192
 193
 194 void QLImage::clip(Params const & params)
 195 {
 196         lyxerr << "clip isNull " << pixmap_.isNull() << ", " <<xformed_pixmap_.isNull() << endl;
 197         if (xformed_pixmap_.isNull())
 198                 return;
 199
 200         if (params.bb.empty())
 201                 // No clipping is necessary.
 202                 return;
 203
 204         int const new_width  = params.bb.xr - params.bb.xl;
 205         int const new_height = params.bb.yt - params.bb.yb;
 206
 207         // No need to check if the width, height are > 0 because the
 208         // Bounding Box would be empty() in this case.
 209         if (new_width > pixmap_.width() || new_height > pixmap_.height()) {
 210                 // Bounds are invalid.
 211                 return;
 212         }
 213
 214         if (new_width == pixmap_.width() && new_height == pixmap_.height())
 215                 return;
 216
 217         int const xoffset_l = params.bb.xl;
 218         int const yoffset_t = ( pixmap_.height() > params.bb.yt ?
 219                                 pixmap_.height() - params.bb.yt : 0 );
 220
 221         xformed_pixmap_.resize(new_width, new_height);
 222         QPainter p;
 223         p.begin(&xformed_pixmap_);
 224         p.drawPixmap(0, 0, pixmap_, xoffset_l, yoffset_t, new_width, new_height);
 225         p.end();
 226 }
 227
 228
 229 void QLImage::rotate(Params const & params)
 230 {
 231         lyxerr << "rotate isNull " << pixmap_.isNull() << ", " <<xformed_pixmap_.isNull() << endl;
 232         if (xformed_pixmap_.isNull())
 233                 return;
 234
 235         if (!params.angle)
 236                 return;
 237
 238         // The angle passed to flimage_rotate is the angle in one-tenth of a
 239         // degree units.
 240
 241         lyxerr[Debug::GRAPHICS] << "rotating image by " << params.angle << " degrees" << endl;
 242
 243         QWMatrix m;
 244         m.rotate(-params.angle);
 245         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 246 }
 247
 248
 249 void QLImage::scale(Params const & params)
 250 {
 251         lyxerr << "scale isNull " << pixmap_.isNull() << ", " <<xformed_pixmap_.isNull() << endl;
 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