*/
#include <config.h>
+#include <math.h> /* ceil */
#include "GuiImage.h"
#include "qt_helpers.h"
#include "support/lstrings.h" // ascii_lowercase
#include <QPainter>
-#include <QImage>
#include <QImageReader>
using namespace std;
namespace lyx {
namespace graphics {
-/// Access to this class is through this static method.
-Image * GuiImage::newImage()
+/// 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_)
+ transformed_(other.transformed_), is_transformed_(other.is_transformed_),
+ fname_(other.fname_)
{}
}
+QImage const & GuiImage::image() const
+{
+ return is_transformed_ ? transformed_ : original_;
+}
+
+
unsigned int GuiImage::width() const
{
+#if QT_VERSION >= 0x050000
+ return static_cast<unsigned int>(ceil(is_transformed_ ?
+ (transformed_.width() / transformed_.devicePixelRatio()) :
+ (original_.width() / original_.devicePixelRatio())));
+#else
return is_transformed_ ? transformed_.width() : original_.width();
+#endif
}
unsigned int GuiImage::height() const
{
+#if QT_VERSION >= 0x050000
+ return static_cast<unsigned int>(ceil(is_transformed_ ?
+ (transformed_.height() / transformed_.devicePixelRatio()) :
+ (original_.height() / original_.devicePixelRatio())));
+#else
return is_transformed_ ? transformed_.height() : original_.height();
+#endif
}
LYXERR(Debug::GRAPHICS, "Image is loaded already!");
return false;
}
+ fname_ = toqstr(filename.absFileName());
+ return load();
+}
+
- if (!original_.load(toqstr(filename.absFilename()))) {
+bool GuiImage::load()
+{
+ if (!original_.load(fname_)) {
LYXERR(Debug::GRAPHICS, "Unable to open image");
return false;
}
bool GuiImage::setPixmap(Params const & params)
{
- if (original_.isNull() || !params.display)
+ if (!params.display)
return false;
+ if (original_.isNull()) {
+ if (!load())
+ return false;
+ }
+
+#if QT_VERSION >= 0x050000
+ original_.setDevicePixelRatio(params.pixel_ratio);
+#endif
+
is_transformed_ = clip(params);
is_transformed_ |= rotate(params);
is_transformed_ |= scale(params);
- if (!is_transformed_)
- // Clear it out to save some memory.
- transformed_ = QPixmap();
+ // Clear the pixmap to save some memory.
+ if (is_transformed_)
+ original_ = QImage();
+ else
+ transformed_ = QImage();
return true;
}
// 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;
+#if QT_VERSION >= 0x050000
+ double const pixelRatio = is_transformed_ ? transformed_.devicePixelRatio() : original_.devicePixelRatio();
+ int const new_width = static_cast<int>((params.bb.xr.inBP() - params.bb.xl.inBP()) * pixelRatio);
+ int const new_height = static_cast<int>((params.bb.yt.inBP() - params.bb.yb.inBP()) * pixelRatio);
+#else
+ int const new_width = static_cast<int>((params.bb.xr.inBP() - params.bb.xl.inBP()));
+ int const new_height = static_cast<int>((params.bb.yt.inBP() - params.bb.yb.inBP()));
+#endif
+
+ 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 > original_.width() || new_height > original_.height()) {
+ if (new_width > image.width() || new_height > image.height()) {
// Bounds are invalid.
return false;
}
- if (new_width == original_.width() && new_height == original_.height())
+ if (new_width == image.width() && new_height == image.height())
return false;
- int const xoffset_l = params.bb.xl;
- int const yoffset_t = (original_.height() > int(params.bb.yt) ?
- original_.height() - params.bb.yt : 0);
+ int const xoffset_l = params.bb.xl.inBP();
+ int const yoffset_t = (image.height() > params.bb.yt.inBP())
+ ? image.height() - params.bb.yt.inBP() : 0;
- transformed_ = original_.copy(xoffset_l, yoffset_t,
- new_width, new_height);
+ transformed_ = image.copy(xoffset_l, yoffset_t, new_width, new_height);
return true;
}
if (!params.angle)
return false;
- if (!is_transformed_)
- transformed_ = original_;
-
+ QImage const & image = is_transformed_ ? transformed_ : original_;
QMatrix m;
- m.rotate(-params.angle);
- transformed_ = transformed_.transformed(m);
+ m.rotate(- params.angle);
+ transformed_ = image.transformed(m);
return true;
}
bool GuiImage::scale(Params const & params)
{
- Dimension dim = scaledDimension(params);
+ QImage const & image = is_transformed_ ? transformed_ : original_;
- if (dim.width() == width() && dim.height() == height())
+ if (params.scale == 100)
return false;
- if (!is_transformed_)
- transformed_ = original_;
+#if QT_VERSION >= 0x050000
+ double const pixelRatio = is_transformed_ ? transformed_.devicePixelRatio() : original_.devicePixelRatio();
+ qreal scale = qreal(params.scale) / 100.0 * pixelRatio;
+#else
+ qreal scale = qreal(params.scale) / 100.0;
+#endif
- QMatrix m;
- m.scale(double(dim.width()) / width(), double(dim.height()) / height());
- transformed_ = transformed_.transformed(m);
+#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);
+ // Bilinear filtering is used to scale graphics preview
+ transformed_ = image.transformed(m, Qt::SmoothTransformation);
return true;
}