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_), xformed_pixmap_(other.xformed_pixmap_)
 103 {
 104 }
 105
 106
 107 QLImage::~QLImage()
 108 {
 109 }
 110
 111
 112 Image * QLImage::clone() const
 113 {
 114         return new QLImage(*this);
 115 }
 116
 117
 118 unsigned int QLImage::getWidth() const
 119 {
 120         return xformed_pixmap_.width();
 121 }
 122
 123
 124 unsigned int QLImage::getHeight() const
 125 {
 126         return xformed_pixmap_.height();
 127 }
 128
 129
 130 void QLImage::load(string const & filename)
 131 {
 132         if (!pixmap_.isNull()) {
 133                 lyxerr[Debug::GRAPHICS]
 134                         << "Image is loaded already!" << endl;
 135                 finishedLoading(false);
 136                 return;
 137         }
 138
 139         if (!pixmap_.load(filename.c_str())) {
 140                 lyxerr[Debug::GRAPHICS]
 141                         << "Unable to open image" << endl;
 142                 finishedLoading(false);
 143                 return;
 144         }
 145         lyxerr[Debug::GRAPHICS] << "just Loaded." << endl;
 146         xformed_pixmap_ = pixmap_;
 147         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 148                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 149         finishedLoading(true);
 150 }
 151
 152
 153 bool QLImage::setPixmap(Params const & params)
 154 {
 155         lyxerr[Debug::GRAPHICS] << "pixmap isNull " << pixmap_.isNull()
 156                 << " xformed_pixmap_ isNull " << xformed_pixmap_.isNull() << endl;
 157         if (pixmap_.isNull() || params.display == NoDisplay)
 158                 return false;
 159
 160         lyxerr[Debug::GRAPHICS] << "setPixmap()" << endl;
 161
 162 // FIXME
 163 #if 0
 164         int color_key;
 165         switch (params.display) {
 166         case MonochromeDisplay:
 167                 color_key = FL_IMAGE_MONO;
 168                 break;
 169         case GrayscaleDisplay:
 170                 color_key = FL_IMAGE_GRAY;
 171                 break;
 172         case ColorDisplay:
 173         default: // NoDisplay cannot happen!
 174                 color_key = FL_IMAGE_RGB;
 175                 break;
 176         }
 177
 178         if (color_key != FL_IMAGE_RGB) {
 179                 flimage_convert(image_, color_key, 0);
 180         }
 181
 182         unsigned int fill = packedcolor(LColor::graphicsbg);
 183         if (fill != image_->fill_color) {
 184                 // the background color has changed.
 185                 // Note that in grayscale/monochrome images the background is
 186                 // grayed also, so this call will have no visible effect. Sorry!
 187                 flimage_replace_pixel(image_, image_->fill_color, fill);
 188                 image_->fill_color = fill;
 189         }
 190 #endif
 191
 192         return true;
 193 }
 194
 195
 196 void QLImage::clip(Params const & params)
 197 {
 198         if (xformed_pixmap_.isNull())
 199                 return;
 200
 201         if (params.bb.empty())
 202                 // No clipping is necessary.
 203                 return;
 204
 205         int const new_width  = params.bb.xr - params.bb.xl;
 206         int const new_height = params.bb.yt - params.bb.yb;
 207
 208         // No need to check if the width, height are > 0 because the
 209         // Bounding Box would be empty() in this case.
 210         if (new_width > pixmap_.width() || new_height > pixmap_.height()) {
 211                 // Bounds are invalid.
 212                 return;
 213         }
 214
 215         if (new_width == pixmap_.width() && new_height == pixmap_.height())
 216                 return;
 217
 218         int const xoffset_l = params.bb.xl;
 219         int const yoffset_t = ( pixmap_.height() > params.bb.yt ?
 220                                 pixmap_.height() - params.bb.yt : 0 );
 221
 222         xformed_pixmap_.resize(new_width, new_height);
 223         QPainter p;
 224         p.begin(&xformed_pixmap_);
 225         p.drawPixmap(0, 0, pixmap_, xoffset_l, yoffset_t, new_width, new_height);
 226         p.end();
 227 }
 228
 229
 230 void QLImage::rotate(Params const & params)
 231 {
 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         if (xformed_pixmap_.isNull())
 252                 return;
 253
 254         unsigned int width;
 255         unsigned int height;
 256         boost::tie(width, height) = getScaledDimensions(params);
 257
 258         if (width == getWidth() && height == getHeight())
 259                 return;
 260
 261         lyxerr[Debug::GRAPHICS] << "resizing image to " << width << "(" <<
 262                 (double(width)/getWidth()) << ")," << height << "(" <<
 263                 (double(height)/getHeight()) << ")" << endl;
 264         QWMatrix m;
 265         m.scale(double(width) / getWidth(), double(height) / getHeight());
 266         xformed_pixmap_ = xformed_pixmap_.xForm(m);
 267 }
 268
 269 } // namespace grfx