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winex11.drv: Optimise getting the bits of a DIB after calling SetDIBits. 

Sync the application's bits in SetDIBits if the input bits are in 
exactly the same format and the size of the image is small enough not to 
cause a performance hit (in case the application doesn't get ever access 
the bits directly).
This commit is contained in:
Rob Shearman 2008-02-21 16:44:59 +00:00 committed by Alexandre Julliard
parent 582de7ba0d
commit 428ada3c8a
1 changed files with 39 additions and 11 deletions
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50
dlls/winex11.drv/dib.c
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@ -107,6 +107,17 @@ static void X11DRV_DIB_Unlock(X_PHYSBITMAP *,BOOL);
dlls/gdi/dib.c
*/
/***********************************************************************
* DIB_DoProtectDIBSection
*/
static void X11DRV_DIB_DoProtectDIBSection( X_PHYSBITMAP *physBitmap, DWORD new_prot )
{
DWORD old_prot;
VirtualProtect(physBitmap->base, physBitmap->size, new_prot, &old_prot);
TRACE("Changed protection from %d to %d\n", old_prot, new_prot);
}
/***********************************************************************
* X11DRV_DIB_GetXImageWidthBytes
*
@ -3960,6 +3971,34 @@ INT X11DRV_SetDIBits( X11DRV_PDEVICE *physDev, HBITMAP hbitmap, UINT startscan,
descr.dibpitch = ((descr.infoWidth * descr.infoBpp + 31) &~31) / 8;
X11DRV_DIB_Lock( physBitmap, DIB_Status_GdiMod );
result = X11DRV_DIB_SetImageBits( &descr );
/* optimisation for the case where the input bits are in exactly the same
* format as the internal representation and copying to the app bits is
* cheap - saves a round trip to the X server */
if (descr.compression == BI_RGB &&
coloruse == DIB_RGB_COLORS &&
descr.infoBpp == bitmap.bmBitsPixel &&
physBitmap->base && physBitmap->size < 65536)
{
unsigned int srcwidthb = bitmap.bmWidthBytes;
int dstwidthb = X11DRV_DIB_GetDIBWidthBytes( width, descr.infoBpp );
LPBYTE dbits = physBitmap->base, sbits = (LPBYTE)bits + (startscan * srcwidthb);
int widthb;
UINT y;
TRACE("syncing compatible set bits to app bits\n");
if ((tmpheight < 0) ^ (bitmap.bmHeight < 0))
{
dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
dstwidthb = -dstwidthb;
}
X11DRV_DIB_DoProtectDIBSection( physBitmap, PAGE_READWRITE );
widthb = min(srcwidthb, abs(dstwidthb));
for (y = 0; y < lines; y++, dbits += dstwidthb, sbits += srcwidthb)
memcpy(dbits, sbits, widthb);
X11DRV_DIB_DoProtectDIBSection( physBitmap, PAGE_READONLY );
physBitmap->status = DIB_Status_InSync;
}
X11DRV_DIB_Unlock( physBitmap, TRUE );
HeapFree(GetProcessHeap(), 0, descr.colorMap);
@ -4115,17 +4154,6 @@ INT X11DRV_GetDIBits( X11DRV_PDEVICE *physDev, HBITMAP hbitmap, UINT startscan,
return lines;
}
/***********************************************************************
* DIB_DoProtectDIBSection
*/
static void X11DRV_DIB_DoProtectDIBSection( X_PHYSBITMAP *physBitmap, DWORD new_prot )
{
DWORD old_prot;
VirtualProtect(physBitmap->base, physBitmap->size, new_prot, &old_prot);
TRACE("Changed protection from %d to %d\n", old_prot, new_prot);
}
/***********************************************************************
* X11DRV_DIB_DoCopyDIBSection
*/