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DPtoLP needs to round the result.
Fixed MulDiv to deal better with negative numbers.
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d3d2477014
commit
ec09a400a7
2 changed files with 39 additions and 10 deletions
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@ -402,24 +402,24 @@ static inline void WINE_UNUSED INTERNAL_LPTODP(DC *dc, LPPOINT point)
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}
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}
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#define XDPTOLP(dc,x) \
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#define XDPTOLP(dc,x) \
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(((x)-(dc)->vportOrgX) * (dc)->wndExtX / (dc)->vportExtX+(dc)->wndOrgX)
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(MulDiv(((x)-(dc)->vportOrgX), (dc)->wndExtX, (dc)->vportExtX) + (dc)->wndOrgX)
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#define YDPTOLP(dc,y) \
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#define YDPTOLP(dc,y) \
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(((y)-(dc)->vportOrgY) * (dc)->wndExtY / (dc)->vportExtY+(dc)->wndOrgY)
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(MulDiv(((y)-(dc)->vportOrgY), (dc)->wndExtY, (dc)->vportExtY) + (dc)->wndOrgY)
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#define XLPTODP(dc,x) \
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#define XLPTODP(dc,x) \
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(((x)-(dc)->wndOrgX) * (dc)->vportExtX / (dc)->wndExtX+(dc)->vportOrgX)
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(MulDiv(((x)-(dc)->wndOrgX), (dc)->vportExtX, (dc)->wndExtX) + (dc)->vportOrgX)
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#define YLPTODP(dc,y) \
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#define YLPTODP(dc,y) \
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(((y)-(dc)->wndOrgY) * (dc)->vportExtY / (dc)->wndExtY+(dc)->vportOrgY)
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(MulDiv(((y)-(dc)->wndOrgY), (dc)->vportExtY, (dc)->wndExtY) + (dc)->vportOrgY)
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/* Device <-> logical size conversion */
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/* Device <-> logical size conversion */
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#define XDSTOLS(dc,x) \
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#define XDSTOLS(dc,x) \
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((x) * (dc)->wndExtX / (dc)->vportExtX)
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MulDiv((x), (dc)->wndExtX, (dc)->vportExtX)
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#define YDSTOLS(dc,y) \
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#define YDSTOLS(dc,y) \
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((y) * (dc)->wndExtY / (dc)->vportExtY)
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MulDiv((y), (dc)->wndExtY, (dc)->vportExtY)
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#define XLSTODS(dc,x) \
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#define XLSTODS(dc,x) \
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((x) * (dc)->vportExtX / (dc)->wndExtX)
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MulDiv((x), (dc)->vportExtX, (dc)->wndExtX)
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#define YLSTODS(dc,y) \
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#define YLSTODS(dc,y) \
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((y) * (dc)->vportExtY / (dc)->wndExtY)
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MulDiv((y), (dc)->vportExtY, (dc)->wndExtY)
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/* GDI local heap */
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/* GDI local heap */
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@ -1029,13 +1029,42 @@ INT WINAPI MulDiv(
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) {
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) {
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#if (SIZEOF_LONG_LONG >= 8)
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#if (SIZEOF_LONG_LONG >= 8)
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long long ret;
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long long ret;
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if (!nDivisor) return -1;
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if (!nDivisor) return -1;
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ret = (((long long)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
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/* We want to deal with a positive divisor to simplify the logic. */
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if (nDivisor < 0)
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{
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nMultiplicand = - nMultiplicand;
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nDivisor = -nDivisor;
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}
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/* If the result is positive, we "add" to round. else, we subtract to round. */
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if ( ( (nMultiplicand < 0) && (nMultiplier < 0) ) ||
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( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
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ret = (((long long)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
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else
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ret = (((long long)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
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if ((ret > 2147483647) || (ret < -2147483647)) return -1;
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if ((ret > 2147483647) || (ret < -2147483647)) return -1;
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return ret;
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return ret;
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#else
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#else
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if (!nDivisor) return -1;
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if (!nDivisor) return -1;
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return ((nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
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/* We want to deal with a positive divisor to simplify the logic. */
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if (nDivisor < 0)
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{
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nMultiplicand = - nMultiplicand;
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nDivisor = -nDivisor;
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}
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/* If the result is positive, we "add" to round. else, we subtract to round. */
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if ( ( (nMultiplicand < 0) && (nMultiplier < 0) ) ||
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( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
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return ((nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
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return ((nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
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#endif
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#endif
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}
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}
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/*******************************************************************
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/*******************************************************************
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