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[WIN32K] Implement RECTL_bClipRectBySize() and use it in IntEngBitBlt() to clip the target rect against the bounds of the target surface. Also clip the source rect against the source surface. Fixes remaining part of CORE-14463

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This commit is contained in:
Timo Kreuzer 2018-03-11 23:03:38 +01:00
parent 79ad68ddc3
commit 2170901e6a
3 changed files with 45 additions and 10 deletions
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32
win32ss/gdi/eng/bitblt.c
View file

@ -619,20 +619,26 @@ IntEngBitBlt(
BOOL bResult;
RECTL rclClipped;
RECTL rclSrc;
RECTL rclSrcClipped;
POINTL ptlBrush;
PFN_DrvBitBlt pfnBitBlt;
/* Sanity checks */
ASSERT(IS_VALID_ROP4(Rop4));
ASSERT(psoTrg);
psurfTrg = CONTAINING_RECORD(psoTrg, SURFACE, SurfObj);
/* FIXME: Should we really allow to pass non-well-ordered rects? */
/* Get the target rect and make it well ordered */
rclClipped = *prclTrg;
RECTL_vMakeWellOrdered(&rclClipped);
//DPRINT1("Rop4 : 0x%08x\n", Rop4);
/* Sanity check */
ASSERT(IS_VALID_ROP4(Rop4));
/* Clip the target rect against the bounds of the target surface */
if (!RECTL_bClipRectBySize(&rclClipped, &rclClipped, &psoTrg->sizlBitmap))
{
/* Nothing left */
return TRUE;
}
if (pco)
{
@ -660,7 +666,21 @@ IntEngBitBlt(
rclSrc.top = pptlSrc->y + rclClipped.top - prclTrg->top;
rclSrc.right = rclSrc.left + rclClipped.right - rclClipped.left;
rclSrc.bottom = rclSrc.top + rclClipped.bottom - rclClipped.top;
pptlSrc = (PPOINTL)&rclSrc;
/* Clip the source rect against the size of the source surface */
if (!RECTL_bClipRectBySize(&rclSrcClipped, &rclSrc, &psoSrc->sizlBitmap))
{
/* Nothing left */
return TRUE;
}
/* Fix up target rect */
rclClipped.left += (rclSrcClipped.left - rclSrc.left);
rclClipped.top += (rclSrcClipped.top - rclSrc.top);
rclClipped.right -= (rclSrc.right - rclSrcClipped.right);
rclClipped.bottom -= (rclSrc.bottom - rclSrcClipped.bottom);
pptlSrc = (PPOINTL)&rclSrcClipped;
}
else
{

9
win32ss/gdi/eng/bitblt_new.c
View file

@ -410,10 +410,11 @@ IntEngBitBlt(
ASSERT(prclTrg);
/* Clip the target rect to the extents of the target surface */
rcClipped.left = max(prclTrg->left, 0);
rcClipped.top = max(prclTrg->top, 0);
rcClipped.right = min(prclTrg->right, psoTrg->sizlBitmap.cx);
rcClipped.bottom = min(prclTrg->bottom, psoTrg->sizlBitmap.cy);
if (!RECTL_bClipRectBySize(&rcClipped, prclTrg, &psoTrg->sizlBitmap))
{
/* Nothing left */
return TRUE;
}
/* If no clip object is given, use trivial one */
if (!pco) pco = (CLIPOBJ*)&gxcoTrivial;

14
win32ss/gdi/ntgdi/rect.h
View file

@ -67,6 +67,20 @@ RECTL_bIsWellOrdered(
(prcl->top <= prcl->bottom));
}
FORCEINLINE
BOOL
RECTL_bClipRectBySize(
_Out_ RECTL *prclDst,
_In_ const RECTL *prclSrc,
_In_ const SIZEL *pszl)
{
prclDst->left = max(prclSrc->left, 0);
prclDst->top = max(prclSrc->top, 0);
prclDst->right = min(prclSrc->right, pszl->cx);
prclDst->bottom = min(prclSrc->bottom, pszl->cy);
return !RECTL_bIsEmptyRect(prclDst);
}
BOOL
FASTCALL
RECTL_bUnionRect(