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amitabh
Nov 23rd, 2000, 07:51 AM
Is there an alternate API to StrechBlt? It seems to distort the colors on compressing the image.
Nov 23rd, 2000, 02:32 PM
You can try VB's PaintPicture method.
KENNNY
Nov 23rd, 2000, 03:30 PM
yeah but doesnt paintpicture call stretchtblt behind the scenes? :)
amitabh
Nov 24th, 2000, 02:34 AM
Surprisingly, PaintPicture does a much better job than StrecthBlt.
KENNNY
Nov 24th, 2000, 12:51 PM
yeah but its slow n horrible
Mad Compie
Nov 24th, 2000, 01:04 PM
You can use the SetStretchBltMode API for smooth shrinking (DELETE_SCANS) or enlarging (HALFTONE).
Nov 25th, 2000, 09:46 AM
Kenny: Awhile ago, Kedaman did some tests on this and PaintPicture proved to be faster.

NOTE: StretchBlt draws on DC's, whereas PaintPicture draws on StdPicture objects.
KENNNY
Nov 25th, 2000, 11:16 AM
ok i withdraw whatever i said :)
Nov 25th, 2000, 07:30 PM
Well, actually, I think StretchBlt is faster for drawing an image without any modification (in which case, you'd use BitBlt).
KENNNY
Nov 26th, 2000, 05:48 AM
yeah, cos bitblt is just a straight memcopy if you use srccopy as the op.