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Prevent painting outside surface

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svn path=/trunk/; revision=5019
This commit is contained in:
Gé van Geldorp 2003-07-09 07:00:00 +00:00
parent d4b51b9c1f
commit d1c76c1e31
1 changed files with 83 additions and 29 deletions
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112
reactos/subsys/win32k/eng/bitblt.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: bitblt.c,v 1.21 2003/06/28 08:39:18 gvg Exp $
/* $Id: bitblt.c,v 1.22 2003/07/09 07:00:00 gvg Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -67,16 +67,19 @@ BOOL STDCALL EngIntersectRect(PRECTL prcDst, PRECTL prcSrc1, PRECTL prcSrc2)
prcDst->right = min(prcSrc1->right, prcSrc2->right);
if (prcDst->left < prcDst->right)
{
prcDst->top = max(prcSrc1->top, prcSrc2->top);
prcDst->bottom = min(prcSrc1->bottom, prcSrc2->bottom);
{
prcDst->top = max(prcSrc1->top, prcSrc2->top);
prcDst->bottom = min(prcSrc1->bottom, prcSrc2->bottom);
if (prcDst->top < prcDst->bottom) return(TRUE);
}
if (prcDst->top < prcDst->bottom)
{
return TRUE;
}
}
*prcDst = rclEmpty;
return(FALSE);
return FALSE;
}
static BOOLEAN STDCALL
@ -208,13 +211,6 @@ EngBitBlt(SURFOBJ *DestObj,
RECTL ClipRect;
unsigned i;
/* Check for degenerate case: if height or width of DestRect is 0 pixels there's
nothing to do */
if (DestRect->right == DestRect->left || DestRect->bottom == DestRect->top)
{
return TRUE;
}
if (NULL != SourcePoint)
{
InputRect.left = SourcePoint->x;
@ -252,6 +248,39 @@ EngBitBlt(SURFOBJ *DestObj,
}
OutputRect = *DestRect;
if (NULL != ClipRegion)
{
if (OutputRect.left < ClipRegion->rclBounds.left)
{
InputRect.left += ClipRegion->rclBounds.left - OutputRect.left;
InputPoint.x += ClipRegion->rclBounds.left - OutputRect.left;
OutputRect.left = ClipRegion->rclBounds.left;
}
if (ClipRegion->rclBounds.right < OutputRect.right)
{
InputRect.right -= OutputRect.right - ClipRegion->rclBounds.right;
OutputRect.right = ClipRegion->rclBounds.right;
}
if (OutputRect.top < ClipRegion->rclBounds.top)
{
InputRect.top += ClipRegion->rclBounds.top - OutputRect.top;
InputPoint.y += ClipRegion->rclBounds.top - OutputRect.top;
OutputRect.top = ClipRegion->rclBounds.top;
}
if (ClipRegion->rclBounds.bottom < OutputRect.bottom)
{
InputRect.bottom -= OutputRect.bottom - ClipRegion->rclBounds.bottom;
OutputRect.bottom = ClipRegion->rclBounds.bottom;
}
}
/* Check for degenerate case: if height or width of OutputRect is 0 pixels there's
nothing to do */
if (OutputRect.right <= OutputRect.left || OutputRect.bottom <= OutputRect.top)
{
IntEngLeave(&EnterLeaveSource);
return TRUE;
}
if (! IntEngEnter(&EnterLeaveDest, DestObj, &OutputRect, FALSE, &Translate, &OutputObj))
{
@ -264,7 +293,6 @@ EngBitBlt(SURFOBJ *DestObj,
OutputRect.top = DestRect->top + Translate.y;
OutputRect.bottom = DestRect->bottom + Translate.y;
if (NULL != OutputObj)
{
OutputGDI = (PSURFGDI)AccessInternalObjectFromUserObject(OutputObj);
@ -300,7 +328,6 @@ EngBitBlt(SURFOBJ *DestObj,
}
// We don't handle color translation just yet [we dont have to.. REMOVE REMOVE REMOVE]
switch(clippingType)
{
case DC_TRIVIAL:
@ -363,31 +390,58 @@ IntEngBitBlt(SURFOBJ *DestObj,
BOOLEAN ret;
SURFGDI *DestGDI;
SURFGDI *SourceGDI;
RECTL OutputRect;
POINTL InputPoint;
if (NULL != SourcePoint)
{
InputPoint = *SourcePoint;
}
/* Clip against the bounds of the clipping region so we won't try to write
* outside the surface */
if (NULL != ClipRegion)
{
if (! EngIntersectRect(&OutputRect, DestRect, &ClipRegion->rclBounds))
{
return TRUE;
}
InputPoint.x += OutputRect.left - DestRect->left;
InputPoint.y += OutputRect.top - DestRect->top;
}
else
{
OutputRect = *DestRect;
}
if (NULL != SourceObj)
{
SourceGDI = (PSURFGDI) AccessInternalObjectFromUserObject(SourceObj);
MouseSafetyOnDrawStart(SourceObj, SourceGDI, SourcePoint->x, SourcePoint->y,
(SourcePoint->x + abs(DestRect->right - DestRect->left)),
(SourcePoint->y + abs(DestRect->bottom - DestRect->top)));
MouseSafetyOnDrawStart(SourceObj, SourceGDI, InputPoint.x, InputPoint.y,
(InputPoint.x + abs(DestRect->right - DestRect->left)),
(InputPoint.y + abs(DestRect->bottom - DestRect->top)));
}
/* No success yet */
ret = FALSE;
DestGDI = (SURFGDI*)AccessInternalObjectFromUserObject(DestObj);
MouseSafetyOnDrawStart(DestObj, DestGDI, DestRect->left, DestRect->top,
DestRect->right, DestRect->bottom);
MouseSafetyOnDrawStart(DestObj, DestGDI, OutputRect.left, OutputRect.top,
OutputRect.right, OutputRect.bottom);
/* Call the driver's DrvBitBlt if available */
if (NULL != DestGDI->BitBlt) {
ret = DestGDI->BitBlt(DestObj, SourceObj, Mask, ClipRegion, ColorTranslation,
DestRect, SourcePoint, MaskOrigin, Brush, BrushOrigin, Rop4);
}
if (NULL != DestGDI->BitBlt)
{
ret = DestGDI->BitBlt(DestObj, SourceObj, Mask, ClipRegion, ColorTranslation,
&OutputRect, &InputPoint, MaskOrigin, Brush, BrushOrigin,
Rop4);
}
if (! ret) {
ret = EngBitBlt(DestObj, SourceObj, Mask, ClipRegion, ColorTranslation,
DestRect, SourcePoint, MaskOrigin, Brush, BrushOrigin, Rop4);
}
if (! ret)
{
ret = EngBitBlt(DestObj, SourceObj, Mask, ClipRegion, ColorTranslation,
&OutputRect, &InputPoint, MaskOrigin, Brush, BrushOrigin,
Rop4);
}
MouseSafetyOnDrawEnd(DestObj, DestGDI);
if (NULL != SourceObj)