lyx_mirror/src/frontends/qt2/QLImage.C

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/**
* \file QLImage.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Angus Leeming
* \author John Levon
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "debug.h"
#include "QLImage.h"
#include "graphics/GraphicsParams.h"
#include "format.h"
#include "support/lstrings.h" // lowercase
#include "support/lyxfunctional.h" // compare_memfun
#include "qt_helpers.h"
#include <qimage.h>
#include <qpainter.h>
#include <boost/tuple/tuple.hpp>
using lyx::support::lowercase;
using std::endl;
using std::find_if;
using std::string;
namespace lyx {
namespace graphics {
/// Access to this class is through this static method.
Image::ImagePtr QLImage::newImage()
{
ImagePtr ptr;
ptr.reset(new QLImage);
return ptr;
}
/// Return the list of loadable formats.
Image::FormatList QLImage::loadableFormats()
{
static FormatList fmts;
if (!fmts.empty())
return fmts;
// The formats recognised by LyX
Formats::const_iterator begin = formats.begin();
Formats::const_iterator end = formats.end();
lyxerr[Debug::GRAPHICS]
<< "\nThe image loader can load the following directly:\n";
QStrList qt_formats = QImageIO::inputFormats();
QStrListIterator it(qt_formats);
for (; it.current(); ++it) {
lyxerr[Debug::GRAPHICS] << it.current() << endl;
string ext = lowercase(it.current());
// special case
if (ext == "jpeg")
ext = "jpg";
Formats::const_iterator fit =
find_if(begin, end, lyx::compare_memfun(&Format::extension, ext));
if (fit != end)
fmts.push_back(fit->name());
}
if (lyxerr.debugging()) {
lyxerr[Debug::GRAPHICS]
<< "\nOf these, LyX recognises the following formats:\n";
FormatList::const_iterator fbegin = fmts.begin();
FormatList::const_iterator fend = fmts.end();
for (FormatList::const_iterator fit = fbegin; fit != fend; ++fit) {
if (fit != fbegin)
lyxerr[Debug::GRAPHICS] << ", ";
lyxerr[Debug::GRAPHICS] << *fit;
}
lyxerr[Debug::GRAPHICS] << '\n' << endl;
}
return fmts;
}
QLImage::QLImage()
: Image()
{
}
QLImage::QLImage(QLImage const & other)
: Image(other), pixmap_(other.pixmap_),
xformed_pixmap_(other.xformed_pixmap_)
{
}
QLImage::~QLImage()
{
}
Image * QLImage::clone_impl() const
{
return new QLImage(*this);
}
unsigned int QLImage::getWidth_impl() const
{
return xformed_pixmap_.width();
}
unsigned int QLImage::getHeight_impl() const
{
return xformed_pixmap_.height();
}
void QLImage::load_impl(string const & filename)
{
if (!pixmap_.isNull()) {
lyxerr[Debug::GRAPHICS]
<< "Image is loaded already!" << endl;
finishedLoading(false);
return;
}
if (!pixmap_.load(toqstr(filename))) {
lyxerr[Debug::GRAPHICS]
<< "Unable to open image" << endl;
finishedLoading(false);
return;
}
xformed_pixmap_ = pixmap_;
finishedLoading(true);
}
bool QLImage::setPixmap_impl(Params const & params)
{
if (pixmap_.isNull() || params.display == NoDisplay)
return false;
// FIXME: it's a fake kind of grayscale !
switch (params.display) {
case GrayscaleDisplay:
case MonochromeDisplay: {
QImage i(xformed_pixmap_.convertToImage());
xformed_pixmap_.convertFromImage(i, QPixmap::Mono);
break;
}
default:
break;
}
// FIXME
#if 0
unsigned int fill = packedcolor(LColor::graphicsbg);
if (fill != image_->fill_color) {
// the background color has changed.
// Note that in grayscale/monochrome images the background is
// grayed also, so this call will have no visible effect. Sorry!
flimage_replace_pixel(image_, image_->fill_color, fill);
image_->fill_color = fill;
}
#endif
return true;
}
void QLImage::clip_impl(Params const & params)
{
if (xformed_pixmap_.isNull())
return;
if (params.bb.empty())
// No clipping is necessary.
return;
int const new_width = params.bb.xr - params.bb.xl;
int const new_height = params.bb.yt - params.bb.yb;
// No need to check if the width, height are > 0 because the
// Bounding Box would be empty() in this case.
if (new_width > pixmap_.width() || new_height > pixmap_.height()) {
// Bounds are invalid.
return;
}
if (new_width == pixmap_.width() && new_height == pixmap_.height())
return;
int const xoffset_l = params.bb.xl;
int const yoffset_t = (pixmap_.height() > int(params.bb.yt) ?
pixmap_.height() - params.bb.yt : 0);
xformed_pixmap_.resize(new_width, new_height);
QPainter p;
p.begin(&xformed_pixmap_);
p.drawPixmap(0, 0, pixmap_, xoffset_l, yoffset_t, new_width, new_height);
p.end();
}
void QLImage::rotate_impl(Params const & params)
{
if (xformed_pixmap_.isNull())
return;
if (!params.angle)
return;
// The angle passed to flimage_rotate is the angle in one-tenth of a
// degree units.
QWMatrix m;
m.rotate(-params.angle);
xformed_pixmap_ = xformed_pixmap_.xForm(m);
}
void QLImage::scale_impl(Params const & params)
{
if (xformed_pixmap_.isNull())
return;
unsigned int width;
unsigned int height;
boost::tie(width, height) = getScaledDimensions(params);
if (width == getWidth() && height == getHeight())
return;
QWMatrix m;
m.scale(double(width) / getWidth(), double(height) / getHeight());
xformed_pixmap_ = xformed_pixmap_.xForm(m);
}
} // namespace graphics
} // lyx