Bug in drawing curved ‘FOLLOW’ labels when displaying Chinese characters

[nnikolov]

When msPolylineLabelPath() is called in mapprimitive.c it fails because the sizes of the Chinese characters are not calculated correctly. It fails at:

/* If the difference between subsequent angles is > 80% of 180deg

bail because the line likely overlaps itself. */

if ( k > 2 && abs(theta - labelpath->angles[k-2]) > 0.4 * MS_PI ) {

*status = MS_FAILURE; goto FAILURE;

}

These sizes are obtained from the array offsets[] which is populated by calling msGetLabelSizeEx()

msGetLabelSizeEx() in maplabel.c gets the values to put into offsets[] from the function gdImageStringFTEx().

The code displays characters correctly if we force the values in offsets[] to be a reasonable fixed size.

We are using UTF-8 encoding for the Chinese characters, GD 2.0.33 and Mapserver 5.2

[dmorissette]

nnikolov, can you please provide a simple testcase (mapfile + data + request params) to reproduce this? Without that there is not much we can do.

[tbonfort]

closing as no testcase was given, and the rendering changes have modified most of the underlying code affecting this issue.

please reopen or create a new bug if this issue is still relevant, and attach the mapfile and font used.