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mlCreating an NSImage from a bitmap
FROM : Craig Dooley
DATE : Thu Aug 10 18:01:21 2006

I am attempting to take a bitmap, and generate a black/transparent
NSImage from it.  The following example is attempting to draw a 16x16
square in black, that is transparent in the center.  It does create a
16x16 NSImage, which i can display, but only the top line and one
pixel on the second row are black, and the rest is white.  Is there
any way to do this, or do i need to translate the data to another
format first?

unsigned char pattern[] = {
   0xff, 0xff,
   0xff, 0xff,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xc0, 0x03,
   0xff, 0xff,
   0xff, 0xff
};

unsigned char *planes[] = ;
glyph = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:planes
           pixelsWide:16
           pixelsHigh:16
           bitsPerSample:1
           samplesPerPixel:1
           hasAlpha:NO
           isPlanar:NO
           colorSpaceName:NSDeviceBlackColorSpace
           bytesPerRow:0
           bitsPerPixel:0];
image = [[NSImage alloc] init];
[image addRepresentation:glyph];

-Craig
--
-----------------------------------------------------------------------
Craig Dooley <<email_removed>>

Related mailsAuthorDate
mlCreating an NSImage from a bitmap Craig Dooley Aug 10, 18:01
mlRe: Creating an NSImage from a bitmap Daniel Jalkut Aug 10, 19:42
mlRe: Creating an NSImage from a bitmap Hidetomo Katsura Aug 10, 19:46
mlRe: Re: Creating an NSImage from a bitmap Craig Dooley Aug 10, 21:45
mlRe: Creating an NSImage from a bitmap Hidetomo Katsura Aug 10, 22:01