acogitosis

Mostly note to my self for future reference.

What they don’t tell You in the tar backup tutorial is that it’s not enough to edit /etc/fstab (and their instructions for grub are for grub-legacy).

Because after restoring you probably have new partition UUIDs, you must:

• boot livecd
• mount your root fs
• mount -B /dev /rootfs/dev, etc. (with proc and sys at least) to be able to chroot from livecd to your root fs
• chroot /rootfs
• edit /etc/fstab and change UUIDs there (new ones you can get using blkid
• do sudo dpkg-reconfigure -plow grub-pc to automatically upgrade grub config files, just let it install to the drive(s) it was on
• do update-initramfs -u so UUID stored inside initramfs get updated, too

Then you should be able to boot it.

Install VirtualBox Guest Additions in Windows’ safe-mode so system file protection doesn’t interfere with the installation, it’s that simple and fixed all my VirtualBox performance problems.

IE can’t do anything right. If you save some graphical elements to PNG, and try to put them on an area with CSS-defined color, there will be a difference even if you used the same color in the PNG — IE renders PNGs darker than it should. The reason for this is misinterpretation of gAMA frame saved in PNGs that makes it possible to better color-match pictures. The fix is to remove this frame, and doing it on Ubuntu is as easy as:

aptitude install pngcrush
cd your-graphics-directory
mkdir fixed
find . -type f -exec pngcrush -d fixed -rem cHRM -rem gAMA -rem iCCP -rem sRGB {} \;


Now you have a “fixed” directory where you have PNGs that will work properly in IE (and are a bit smaller which is a nice side effect). If you’re sure they’re ok, just do

mv fixed/* ./
rmdir fixed


That’s all.

Straciłem nad tym więcej czasu niż chcę się przyznać; miałem dodać mały element graficzny o nazwie pliku zspon.png do strony jednego z Klientów i jakimś cudem nie pojawiał się on nigdy na stronie, a Firebug pokazywał że ma on “display: none”, choć żadnego CSSa nie przypisywałem.

Okazało się, że Adblock z filtrami Filterset.g wycina mi obrazki które mają w nazwie “spon” :> Wyłączenie Adblocka na czas developmentu to dobry pomysł, choć ja zostawiam włączony - jak ktoś będzie go używał to wolę zawczasu wiedzieć co mu zniknie i zmienić nazwę pliku zs-pon.png się wyświetla

Google wasn’t awfully helpful while I was searching for solution to word wrapping a text when drawing in Java, so let’s teach Google this:

    private void drawStringRect(Graphics2D graphics, int x1, int y1, int x2, int y2, 
        float interline, String txt) {
        AttributedString as = new AttributedString(txt);
        as.addAttribute(TextAttribute.FOREGROUND, graphics.getPaint());
        as.addAttribute(TextAttribute.FONT, graphics.getFont());
        AttributedCharacterIterator aci = as.getIterator();
        FontRenderContext frc = new FontRenderContext(null, true, false);
        LineBreakMeasurer lbm = new LineBreakMeasurer(aci, frc);
        float width = x2 - x1;

        while (lbm.getPosition() < txt.length()) {
            TextLayout tl = lbm.nextLayout(width);
            y1 += tl.getAscent();
            tl.draw(graphics, x1, y1);
            y1 += tl.getDescent() + tl.getLeading() + (interline - 1.0f) * tl.getAscent();
            if (y1 > y2) {
                break;
            }
        }
    }