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>>
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 mails | Author | Date |
|---|---|---|
| Craig Dooley | Aug 10, 18:01 | |
| Daniel Jalkut | Aug 10, 19:42 | |
| Hidetomo Katsura | Aug 10, 19:46 | |
| Craig Dooley | Aug 10, 21:45 | |
| Hidetomo Katsura | Aug 10, 22:01 |






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