mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-09-23 08:39:07 +00:00
7b8908881c
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@26459 a592a061-630c-0410-9148-cb99ea01b6c8
180 lines
3.5 KiB
C++
180 lines
3.5 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 < 0 || params.scale == 100)
|
|
return false;
|
|
|
|
qreal const scale = qreal(params.scale) / 100.0;
|
|
QMatrix m;
|
|
m.scale(scale, scale);
|
|
transformed_ = image.transformed(m);
|
|
return true;
|
|
}
|
|
|
|
} // namespace graphics
|
|
} // lyx
|