Crash while using TextFont.RMSolid render mode.

[manu3d]

OS: Vista (32)
Panda: 1.6.1, official release

Example code below. Comment/uncomment the font-loading lines as desired to reproduce working and not-working behaviours.
Mystral.TTF generates some debugging output. papyrus.ttf only a silent crash, that's why they've been included both.
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import direct.directbase.DirectStart
from pandac.PandaModules import TextNode, TextFont

font = loader.loadFont('/c/Windows/Fonts/arial.ttf') ## This works!
#font = loader.loadFont('/c/Windows/Fonts/Mistral.TTF') ## This doesn't!
#font = loader.loadFont('/c/Windows/Fonts/papyrus.ttf') ## Also doesn't!

font.setPixelsPerUnit(64)
font.setRenderMode(TextFont.RMSolid)

textNode = TextNode("aTextNode")
textNode.setFont(font)
textNode.setText("Meeeeeooow!!!")

textNodePath = aspect2d.attachNewNode(textNode)
textNodePath.setPos(-0.9, 0, 0.5)
textNodePath.setScale(0.2)

run()

[rdb (rdb)]

Confirmed this on my linux box. Papyrus seems to take a lot of memory first followed by a crash.
Here is what it prints:
pvector.dec(array, 1610612744) -> -939463944
python: typeHandle.cxx:81: void TypeHandle::dec_memory_usage(TypeHandle::MemoryClass, int): Assertion `rnode->_memory_usage[memory_class] >= 0' failed.
Aborted

I'm attaching a traceback.

[Treeform (starplant)]

I think this function is rather heavy due to fonts being rather detailed. I propose some check on the font's file size and if its too big throw a warning like "font is to complex."

[David Rose (droklaunchpad)]

It's not a question of the size of the font. The font code takes advantage of our Triangulator class to create geometry in the RMSolid and RMPolygon modes. I got the implementation of this class from a free algorithm I found on the net, but it seems to have some bugs dealing with edge conditions in certain complex polygons, as found in certain fonts.

The right solution will be to fix the bugs in Triangulator, or replace it with an algorithm that doesn't suffer from these bugs.