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2005-11-19 21:39 Alexander Malmberg <alexander@malmberg.org>

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* Source/art/ARTContext.m (flip_bytes, byte_order)
	(-initWithContextInfo:): Detect if the server doesn't have the same
	endianness and adjust the color bitmasks if necessary.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/back/trunk@22044 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Alexander Malmberg 2005-11-19 20:15:53 +00:00
parent b846b79559
commit 9ec13d3934
2 changed files with 41 additions and 2 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2005-11-19 21:39 Alexander Malmberg <alexander@malmberg.org>
* Source/art/ARTContext.m (flip_bytes, byte_order)
(-initWithContextInfo:): Detect if the server doesn't have the same
endianness and adjust the color bitmasks if necessary.
2005-11-18 Fred Kiefer <FredKiefer@gmx.de>
* Source/x11/XGServerWindow.m (-window::::): Don't use the NET WM

33
Source/art/ARTContext.m
View file

@ -725,6 +725,25 @@ very expensive
}
static unsigned int flip_bytes(unsigned int i)
{
return ((i>>24)&0xff)
|((i>> 8)&0xff00)
|((i<< 8)&0xff0000)
|((i<<24)&0xff000000);
}
static int byte_order(void)
{
union
{
unsigned int i;
char c;
} foo;
foo.i = 1;
return foo.c != 1;
}
- (id) initWithContextInfo: (NSDictionary *)info
{
@ -794,6 +813,20 @@ very expensive
bpp = i->bits_per_pixel;
XDestroyImage(i);
/* If the server doesn't have the same endianness as we do, we need
to flip the masks around (well, at least sometimes; not sure
what'll really happen for 15/16bpp modes). */
{
int us = byte_order(); /* True iff we're big-endian. */
int them = ImageByteOrder(d); /* True iff the server is big-endian. */
if (us != them)
{
visual->red_mask = flip_bytes(visual->red_mask);
visual->green_mask = flip_bytes(visual->green_mask);
visual->blue_mask = flip_bytes(visual->blue_mask);
}
}
/* Only returns if the visual was usable. */
artcontext_setup_draw_info(&DI, visual->red_mask, visual->green_mask,
visual->blue_mask, bpp);