Hi You're right, the example should be corrected. Thanks again for fixing this bug!
I've noticed you changed the filename of the example to example4.cpp, you should modify the include directive at the end of the file too to be able to build it. The generated file will be called example4.moc in this case. So this line: #include "main.moc" should be changed to #include "example4.moc" On Tue, Dec 7, 2010 at 8:08 AM, Werner LEMBERG <[email protected]> wrote: > > In October I wrote: > > >> I have tested it and it works. All the glyphs rendered with > >> FT_RASTER_FLAG_DIRECT flag look the same as if they were rendered > >> onto a bitmap. > > > > Unfortunately, this isn't true. Compiling the attached example4.cpp > > and comparing > > > > ./example4 /windows/C/WINDOWS/Fonts/pala.ttf y 200 0 > > > > (image `not-direct.png') with > > > > ./example4 /windows/C/WINDOWS/Fonts/pala.ttf y 200 1 > > > > (image `direct.png') you can easily see rendering differences. In > > particular, the direct rendering is not correct, producing too wide > > images. > > Fortunately, this my suspicion: > > > Reason for the mismatch are negative x and y coordinate values in > > the data fed to the smooth renderer, I believe, causing rounding > > errors. In non-direct `mode', the outline is first shifted to have > > no negative coordinates so the problem is not seen. > > was incorrect. Comparing the debugging output (using FT2_DEBUG=any:7) > shows that only the colours differ minimally but not the coordinates. > > The real problem is that a Qt line consists of at least two pixels! > Doing > > painter->drawLine(0, 0, 0, 0); > > draws nothing. Consequently, this code in example4.cpp > > if (span.len > 0) > painter->drawLine(span.x, y, span.x + span.len, y); > > must be replaced with > > if (span.len > 1) > painter->drawLine(span.x, y, span.x + span.len - 1, y); > else > painter->drawPoint(span.x, y); > > and the shapes become identical. Finally, I've added > > painter.setPen(Qt::black); > > so that the direct rendering becomes really black also. > > I've now added the files to > > http://www.freetype.org/freetype2/docs/tutorial/step3.html > > > Werner >
_______________________________________________ Freetype mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/freetype
