Quartz2D: Text on context appears upside down and mirrored

[Grinarn]

Hi,

i got a custom UIView-subclass and in the drawRect-Method, i am drwing on the context.
The drawing stuff works fine, but when i show some text, it is upside down ond mirrored.

CGContextRef ctx = UIGraphicsGetCurrentContext();
...
...
CGContextSelectFont(ctx, PDF_FONT_NAME, 20, kCGEncodingMacRoman);
CGContextSetTextDrawingMode (ctx, kCGTextFill);
CGContextSetRGBFillColor (ctx, 1, 1, 1, 1);
     
const char *goodVals = "Some Text";
CGContextShowTextAtPoint (ctx, 35, 250, goodVals, strlen(goodVals));

I use this code in my app several times and it works fine there.
Any ideas why the text is upside down and mirrored?

Regards,
Daniel

[JDave]

I use this code in my app several times and it works fine there.
Any ideas why the text is upside down and mirrored?

It has been my experience that text is always drawn upside down the way you are describing... other graphics objects are treated with 0,0 in the top left of the image, and thus are not rendered upsidedown.

insert:

CGAffineTransform textTransform = CGAffineTransformMake(1.0, 0.0, 0.0, -1.0, 0.0, 0.0);
CGContextSetTextMatrix(ctx, textTransform);

before:

CGContextShowTextAtPoint (ctx, 35, 250, goodVals, strlen(goodVals));

to set it back to what you 'want'.

[Grinarn]

Thanks, i didnt thought about this possibilty. Works fine.

[JDave]

Apple's Graphics & Animation Coding How-To's mention another way:

[myText drawAtPoint:CGPointMake(0.0,0.0) withFont:[UIFont systemFontOfSize:[UIFont systemFontSize]]];

where myText is an NSString.