lyx_mirror/src/frontends/qt4/GuiImage.cpp
Pavel Sanda 62ca7f3ae5 Proper camel case for FileName.absFilename
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@34234 a592a061-630c-0410-9148-cb99ea01b6c8
2010-04-21 01:19:09 +00:00

188 lines
3.7 KiB
C++

/**
* \file GuiImage.cpp
* 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 "GuiImage.h"
#include "qt_helpers.h"
#include "Format.h"
#include "graphics/GraphicsParams.h"
#include "support/debug.h"
#include "support/FileName.h"
#include "support/lstrings.h" // ascii_lowercase
#include <QPainter>
#include <QImageReader>
using namespace std;
using namespace lyx::support;
namespace lyx {
namespace graphics {
/// Implement factory method defined in GraphicsImage.h
Image * newImage()
{
return new GuiImage;
}
GuiImage::GuiImage() : is_transformed_(false)
{}
GuiImage::GuiImage(GuiImage const & other)
: Image(other), original_(other.original_),
transformed_(other.transformed_), is_transformed_(other.is_transformed_),
fname_(other.fname_)
{}
Image * GuiImage::clone() const
{
return new GuiImage(*this);
}
QImage const & GuiImage::image() const
{
return is_transformed_ ? transformed_ : original_;
}
unsigned int GuiImage::width() const
{
return is_transformed_ ? transformed_.width() : original_.width();
}
unsigned int GuiImage::height() const
{
return is_transformed_ ? transformed_.height() : original_.height();
}
bool GuiImage::load(FileName const & filename)
{
if (!original_.isNull()) {
LYXERR(Debug::GRAPHICS, "Image is loaded already!");
return false;
}
fname_ = toqstr(filename.absFileName());
return load();
}
bool GuiImage::load()
{
if (!original_.load(fname_)) {
LYXERR(Debug::GRAPHICS, "Unable to open image");
return false;
}
return true;
}
bool GuiImage::setPixmap(Params const & params)
{
if (!params.display)
return false;
if (original_.isNull()) {
if (!load())
return false;
}
is_transformed_ = clip(params);
is_transformed_ |= rotate(params);
is_transformed_ |= scale(params);
// Clear the pixmap to save some memory.
if (is_transformed_)
original_ = QImage();
else
transformed_ = QImage();
return true;
}
bool GuiImage::clip(Params const & params)
{
if (params.bb.empty())
// No clipping is necessary.
return false;
int const new_width = params.bb.xr - params.bb.xl;
int const new_height = params.bb.yt - params.bb.yb;
QImage const & image = is_transformed_ ? transformed_ : original_;
// No need to check if the width, height are > 0 because the
// Bounding Box would be empty() in this case.
if (new_width > image.width() || new_height > image.height()) {
// Bounds are invalid.
return false;
}
if (new_width == image.width() && new_height == image.height())
return false;
int const xoffset_l = params.bb.xl;
int const yoffset_t = (image.height() > int(params.bb.yt))
? image.height() - params.bb.yt : 0;
transformed_ = image.copy(xoffset_l, yoffset_t, new_width, new_height);
return true;
}
bool GuiImage::rotate(Params const & params)
{
if (!params.angle)
return false;
QImage const & image = is_transformed_ ? transformed_ : original_;
QMatrix m;
m.rotate(- params.angle);
transformed_ = image.transformed(m);
return true;
}
bool GuiImage::scale(Params const & params)
{
QImage const & image = is_transformed_ ? transformed_ : original_;
if (params.scale == 100)
return false;
qreal scale = qreal(params.scale) / 100.0;
#if (QT_VERSION >= 0x040500) && (QT_VERSION <= 0x040502)
// Due to a bug in Qt, LyX will crash for certain
// scaling factors and sizes of the image.
// see bug #5957: http://www.lyx.org/trac/ticket/5957
scale += 0.0001;
#endif
QMatrix m;
m.scale(scale, scale);
transformed_ = image.transformed(m);
return true;
}
} // namespace graphics
} // lyx