[Pythonmac-SIG] PyObjC and Quartz - CGContextShowGlyphsAtPoint
Rand Dvorak
randdvorak at gmail.com
Mon Apr 29 16:15:03 CEST 2013
See the second message with more specifics and code, I was able to get it working by translating this objective-c code:
http://www.gogo-robot.com/2009/06/07/two-awkward-things-about-iphone-development/
into this code:
def draw(self,c):
length = len(self.string)
glyphs = objc.allocateBuffer(length)
chars = objc.allocateBuffer(length + 1)
self.string.getCString_maxLength_encoding_(chars, length + 1, NSASCIIStringEncoding)
for i in range(length):
glyphs[i] = chr(ord(chars[i]) - 29)
CGContextSaveGState(c)
CGContextSetFont(c, self.font)
CGContextSetFontSize(c, self.size)
CGContextSetRGBFillColor(c, 0, 0, 0, 1)
CGContextSetRGBStrokeColor (c, 0, 0, 0, 1)
CGContextSetTextMatrix (c, self.xform)
CGContextShowGlyphsAtPoint(c, 0, 0, glyphs, length)
CGContextRestoreGState(c)
changing:
CGContextShowGlyphsAtPoint(c, 0, 0, glyphs, length)
to:
CGContextShowGlyphsAtPoint(c, 0, 0, tuple(map(ord, glyphs)), length)
Sadly, CTFontGetGlyphsForCharacters(...), doesn't seem to be in the bridgesupport on 10.6 and I still need to support it. A CGGlyph is apparently an unsigned short, so a char array returned by objc.allocateBuffer() seems to suffice.
Thanks for your help.
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