Hi, all,
About the exaGetPixmapOffset function in exa.c, please see below,
In Xserver 1.6.4 version, describe as:
static _X_INLINE void*
ExaGetPixmapAddress(PixmapPtr p)
{
ExaPixmapPriv(p);
if (pExaPixmap->offscreen && pExaPixmap->fb_ptr)
return pExaPixmap->fb_ptr;
else
return pExaPixmap->sys_ptr;
}
/**
* exaGetPixmapOffset() returns the offset (in bytes) within the framebuffer of
* the beginning of the given pixmap.
*
* Note that drivers are free to, and often do, munge this offset as necessary
* for handing to the hardware -- for example, translating it into a different
* aperture. This function may need to be extended in the future if we grow
* support for having multiple card-accessible offscreen, such as an AGP memory
* pool alongside the framebuffer pool.
*/
unsigned long
exaGetPixmapOffset(PixmapPtr pPix)
{
ExaScreenPriv (pPix->drawable.pScreen);
return ((unsigned long)ExaGetPixmapAddress(pPix) -
(unsigned long)pExaScr->info->memoryBase);
}
In > Xserver 1.7 version, describe as:
/**
* exaGetPixmapOffset() returns the offset (in bytes) within the framebuffer of
* the beginning of the given pixmap.
*
* Note that drivers are free to, and often do, munge this offset as necessary
* for handing to the hardware -- for example, translating it into a different
* aperture. This function may need to be extended in the future if we grow
* support for having multiple card-accessible offscreen, such as an AGP memory
* pool alongside the framebuffer pool.
*/
unsigned long
exaGetPixmapOffset(PixmapPtr pPix)
{
ExaScreenPriv (pPix->drawable.pScreen);
ExaPixmapPriv (pPix);
return (CARD8 *)pExaPixmap->fb_ptr - pExaScr->info->memoryBase;
}
Who can explain the change? Why del the the part of sys_ptr in > 1.7 version?
Thanks,
Hunk Cui
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