91 lines
2.2 KiB
C++
91 lines
2.2 KiB
C++
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//+---------------------------------------------------------------------
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//
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// File: himetric.cxx
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//
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// Contents: Routines to convert Pixels to Himetric and vice versa
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//
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//----------------------------------------------------------------------
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#include "headers.hxx"
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#pragma hdrstop
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#define HIMETRIC_PER_INCH 2540L
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//+---------------------------------------------------------------
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//
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// Function: HimetricFromHPix
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//
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// Synopsis: Converts horizontal pixel units to himetric units.
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//
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//----------------------------------------------------------------
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long
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HimetricFromHPix(int iPix)
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{
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HDC hdc = GetDC(NULL);
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if (!hdc)
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return 0;
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int iPPLI = GetDeviceCaps(hdc, LOGPIXELSX);
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ReleaseDC(NULL, hdc);
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return (HIMETRIC_PER_INCH * (long)iPix)/(long)iPPLI;
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}
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//+---------------------------------------------------------------
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//
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// Function: HimetricFromVPix
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//
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// Synopsis: Converts vertical pixel units to himetric units.
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//
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//----------------------------------------------------------------
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long
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HimetricFromVPix(int iPix)
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{
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HDC hdc = GetDC(NULL);
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if (!hdc)
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return 0;
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int iPPLI = GetDeviceCaps(hdc, LOGPIXELSY);
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ReleaseDC(NULL, hdc);
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return (HIMETRIC_PER_INCH * (long)iPix)/(long)iPPLI;
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}
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//+---------------------------------------------------------------
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//
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// Function: HPixFromHimetric
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//
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// Synopsis: Converts himetric units to horizontal pixel units.
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//
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//----------------------------------------------------------------
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int
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HPixFromHimetric(long lHi)
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{
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HDC hdc = GetDC(NULL);
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if (!hdc)
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return 0;
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int iPPLI = GetDeviceCaps(hdc, LOGPIXELSX);
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ReleaseDC(NULL, hdc);
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return (int)(( (iPPLI * lHi) + (HIMETRIC_PER_INCH / 2) )/HIMETRIC_PER_INCH);
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}
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//+---------------------------------------------------------------
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//
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// Function: VPixFromHimetric
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//
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// Synopsis: Converts himetric units to vertical pixel units.
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//
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//----------------------------------------------------------------
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int
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VPixFromHimetric(long lHi)
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{
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HDC hdc = GetDC(NULL);
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if (!hdc)
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return 0;
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int iPPLI = GetDeviceCaps(hdc, LOGPIXELSY);
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ReleaseDC(NULL, hdc);
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return (int)(( (iPPLI * lHi) + (HIMETRIC_PER_INCH / 2) )/HIMETRIC_PER_INCH);
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}
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