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Implement missing grayscale transformation.

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8714 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Angus Leeming 2004-04-29 16:06:59 +00:00
parent 250d7506c6
commit 14b065c2e3
2 changed files with 39 additions and 5 deletions
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6
src/frontends/qt2/ChangeLog
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@ -1,3 +1,9 @@
2004-04-29 Angus Leeming <leeming@lyx.org>
* QLImage.C (toGray): new helper function, copied from
KImageEffect::toGray.
(setPixmap_impl): use it.
2004-04-29 Angus Leeming <leeming@lyx.org>
* QGraphics.C (apply): Remove a #warning statement by

38
src/frontends/qt2/QLImage.C
View File

@ -103,7 +103,7 @@ QLImage::QLImage()
QLImage::QLImage(QLImage const & other)
: Image(other), pixmap_(other.pixmap_),
xformed_pixmap_(other.xformed_pixmap_)
xformed_pixmap_(other.pixmap_)
{
}
@ -151,16 +151,44 @@ void QLImage::load_impl(string const & filename)
}
namespace {
// This code is taken from KImageEffect::toGray
QImage & toGray(QImage & img)
{
if (img.width() == 0 || img.height() == 0)
return img;
int const pixels = img.depth() > 8 ?
img.width() * img.height() : img.numColors();
unsigned int * const data = img.depth() > 8 ?
(unsigned int *)img.bits() :
(unsigned int *)img.colorTable();
for(int i = 0; i < pixels; ++i){
int const val = qGray(data[i]);
data[i] = qRgba(val, val, val, qAlpha(data[i]));
}
return img;
}
} // namespace anon
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: {
case GrayscaleDisplay: {
QImage i(xformed_pixmap_.convertToImage());
xformed_pixmap_.convertFromImage(toGray(i));
break;
}
case MonochromeDisplay: {
QImage i(xformed_pixmap_.convertToImage());
xformed_pixmap_.convertFromImage(i, QPixmap::Mono);
break;