1 /* This file is part of
2 * =================================================
4 * LyX, The Document Processor
5 * Copyright 1995 Matthias Ettrich.
6 * Copyright 1995-2001 The LyX Team.
8 * This file Copyright 2000 Baruch Even
9 * ================================================= */
14 #pragma implementation
17 #include "graphics/GraphicsCache.h"
18 #include "graphics/GraphicsCacheItem.h"
19 #include "frontends/support/LyXImage.h"
20 #include "graphics/ImageLoaderXPM.h"
21 #include "converter.h"
22 #include "support/filetools.h"
23 #include "support/lyxlib.h"
24 #include "lyx_gui_misc.h"
26 #include "support/LAssert.h"
32 * The order of conversion:
34 * The c-tor calls convertImage()
36 * convertImage() verifies that we need to do conversion, if not it will just
37 * call the loadImage()
38 * if conversion is needed, it will initiate the conversion.
40 * When the conversion is completed imageConverted() is called, which in turn
43 * Since we currently do everything synchronously, convertImage() calls
44 * imageConverted() right after it does the call to the conversion process.
47 GraphicsCacheItem::GraphicsCacheItem(string const & filename)
48 : imageStatus_(GraphicsCacheItem::Loading)
52 bool success = convertImage(filename);
53 if (! success) // Conversion failed miserably (couldn't even start).
54 setStatus(ErrorConverting);
58 GraphicsCacheItem::~GraphicsCacheItem()
62 GraphicsCacheItem::ImageStatus
63 GraphicsCacheItem::getImageStatus() const { return imageStatus_; }
66 void GraphicsCacheItem::setStatus(ImageStatus new_status)
68 imageStatus_ = new_status;
73 GraphicsCacheItem::getImage() const { return image_.get(); }
77 GraphicsCacheItem::imageConverted(bool success)
79 lyxerr << "imageConverted, status=" << success << endl;
82 lyxerr << "(GraphicsCacheItem::imageConverter) "
83 "Error converting image." << endl;
84 setStatus(GraphicsCacheItem::ErrorConverting);
88 // Do the actual image loading from file to memory.
95 string const findTargetFormat(string const & from)
97 typedef ImageLoader::FormatList FormatList;
98 FormatList formats = ImageLoaderXPM().loadableFormats();
99 lyx::Assert(formats.size() > 0); // There must be a format to load from.
101 FormatList::const_iterator iter = formats.begin();
102 FormatList::const_iterator end = formats.end();
104 for (; iter != end; ++iter) {
105 if (converters.IsReachable(from, *iter))
109 // We do not know how to convert the image to something loadable.
110 lyxerr << "ERROR: Do not know how to convert image." << std::endl;
112 string const first(_("Cannot convert image to display format"));
113 string const second1(_("Need converter from "));
114 string const second2(_(" to "));
115 string const second(second1 + from + second2 + formats[0]);
117 WriteAlert(first, second);
129 GraphicsCacheItem::convertImage(string const & filename)
131 string const from = GetExtension(filename);
132 string const to = findTargetFormat(from);
136 // Take only the filename part of the file, without path or extension.
137 string temp = OnlyFilename(filename);
138 temp = ChangeExtension(filename, string());
140 // Add some stuff to have it a unique temp file.
141 // This tempfile is deleted in loadImage after it is loaded to memory.
142 tempfile = lyx::tempName(string(), temp);
143 // Remove the temp file, we only want the name...
144 lyx::unlink(tempfile);
146 converters.Convert(0, filename, tempfile, from, to);
148 // For now we are synchronous
149 imageConverted(true);
151 // Cleanup after the conversion.
152 lyx::unlink(tempfile);
159 // This function gets called from the callback after the image has been
160 // converted successfully.
162 GraphicsCacheItem::loadImage()
164 lyxerr << "Loading XPM Image... ";
166 ImageLoaderXPM imageLoader;
167 if (imageLoader.loadImage(tempfile) == ImageLoader::OK) {
168 lyxerr << "Success." << endl;
169 image_.reset(imageLoader.getImage());
170 setStatus(GraphicsCacheItem::Loaded);
172 lyxerr << "Loading " << tempfile << "Failed" << endl;
173 setStatus(GraphicsCacheItem::ErrorReading);