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Generalize kludge in fbdev that normalizes pixel formats to something that

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Render can handle
This commit is contained in:
Keith Packard 2001-07-11 05:02:24 +00:00
parent 562474091a
commit 99fb2eb76d
1 changed files with 36 additions and 6 deletions
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42
hw/kdrive/fbdev/fbdev.c
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@ -21,7 +21,7 @@
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $XFree86: xc/programs/Xserver/hw/kdrive/fbdev/fbdev.c,v 1.21 2001/06/16 05:53:05 keithp Exp $ */
/* $XFree86: xc/programs/Xserver/hw/kdrive/fbdev/fbdev.c,v 1.22 2001/06/21 00:58:51 keithp Exp $ */
#include "fbdev.h"
@ -86,6 +86,23 @@ fbdevCardInit (KdCardInfo *card)
return TRUE;
}
#define FBDEV_KLUDGE_FORMAT
#ifdef FBDEV_KLUDGE_FORMAT
static Pixel
fbdevMakeContig (Pixel orig, Pixel others)
{
Pixel low;
low = lowbit (orig) >> 1;
while (low && (others & low) == 0)
{
orig |= low;
low >>= 1;
}
return orig;
}
#endif
Bool
fbdevScreenInitialize (KdScreenInfo *screen, FbdevScrPriv *scrpriv)
{
@ -141,11 +158,24 @@ fbdevScreenInitialize (KdScreenInfo *screen, FbdevScrPriv *scrpriv)
screen->fb[0].redMask = Mask (priv->var.red.offset, priv->var.red.length);
screen->fb[0].greenMask = Mask (priv->var.green.offset, priv->var.green.length);
screen->fb[0].blueMask = Mask (priv->var.blue.offset, priv->var.blue.length);
#ifdef ITSY
screen->fb[0].redMask = 0xf800;
screen->fb[0].greenMask = 0x07e0;
screen->fb[0].blueMask = 0x001f;
#endif
#ifdef FBDEV_KLUDGE_FORMAT
/*
* This is a kludge so that Render will work -- fill in the gaps
* in the pixel
*/
screen->fb[0].redMask = fbdevMakeContig (screen->fb[0].redMask,
screen->fb[0].greenMask|
screen->fb[0].blueMask);
screen->fb[0].greenMask = fbdevMakeContig (screen->fb[0].greenMask,
screen->fb[0].redMask|
screen->fb[0].blueMask);
screen->fb[0].blueMask = fbdevMakeContig (screen->fb[0].blueMask,
screen->fb[0].redMask|
screen->fb[0].greenMask);
#endif
allbits = screen->fb[0].redMask | screen->fb[0].greenMask | screen->fb[0].blueMask;
depth = 32;
while (depth && !(allbits & (1 << (depth - 1))))