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fb: Fix 1bpp Xservers on "whitePixel=0, blackPixel=1" VRAMs 

Closes: #1057
This commit is contained in:
Izumi Tsutsui 2023-04-20 01:32:15 +09:00 committed by Matt Turner
parent 15624bb5bc
commit f2b019d2b3
3 changed files with 47 additions and 3 deletions
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3
fb/fb.h
View File

@ -734,6 +734,9 @@ fbResolveColor(unsigned short *pred,
extern _X_EXPORT Bool
fbInitializeColormap(ColormapPtr pmap);
extern _X_EXPORT Bool
mfbCreateColormap(ColormapPtr pmap);
extern _X_EXPORT int
fbExpandDirectColors(ColormapPtr pmap,

35
fb/fbcmap_mi.c
View File

@ -66,6 +66,41 @@ fbInitializeColormap(ColormapPtr pmap)
return miInitializeColormap(pmap);
}
Bool
mfbCreateColormap(ColormapPtr pmap)
{
ScreenPtr pScreen;
unsigned short red0, green0, blue0;
unsigned short red1, green1, blue1;
Pixel pix;
pScreen = pmap->pScreen;
if (pScreen->whitePixel == 0)
{
red0 = green0 = blue0 = ~0;
red1 = green1 = blue1 = 0;
}
else
{
red0 = green0 = blue0 = 0;
red1 = green1 = blue1 = ~0;
}
/* this is a monochrome colormap, it only has two entries, just fill
* them in by hand. If it were a more complex static map, it would be
* worth writing a for loop or three to initialize it */
/* this will be pixel 0 */
pix = 0;
if (AllocColor(pmap, &red0, &green0, &blue0, &pix, 0) != Success)
return FALSE;
/* this will be pixel 1 */
if (AllocColor(pmap, &red1, &green1, &blue1, &pix, 0) != Success)
return FALSE;
return TRUE;
}
int
fbExpandDirectColors(ColormapPtr pmap,
int ndef, xColorItem * indefs, xColorItem * outdefs)

6
fb/fbscreen.c
View File

@ -100,8 +100,10 @@ fbSetupScreen(ScreenPtr pScreen, void *pbits, /* pointer to screen bitmap */
if (!fbAllocatePrivates(pScreen))
return FALSE;
pScreen->defColormap = FakeClientID(0);
if (bpp > 1) {
/* let CreateDefColormap do whatever it wants for pixels */
pScreen->blackPixel = pScreen->whitePixel = (Pixel) 0;
}
pScreen->QueryBestSize = fbQueryBestSize;
/* SaveScreen */
pScreen->GetImage = fbGetImage;
@ -118,7 +120,11 @@ fbSetupScreen(ScreenPtr pScreen, void *pbits, /* pointer to screen bitmap */
pScreen->RealizeFont = fbRealizeFont;
pScreen->UnrealizeFont = fbUnrealizeFont;
pScreen->CreateGC = fbCreateGC;
if (bpp == 1) {
pScreen->CreateColormap = mfbCreateColormap;
} else {
pScreen->CreateColormap = fbInitializeColormap;
}
pScreen->DestroyColormap = (void (*)(ColormapPtr)) NoopDDA;
pScreen->InstallColormap = fbInstallColormap;
pScreen->UninstallColormap = fbUninstallColormap;