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/*
* OLEUTL.CPP
*
* Miscellaneous utility functions for OLE 2.0 Applications:
*
* Function Purpose
* -------------------------------------------------------------------
* XformWidthInHimetricToPixels Converts an int width from HiMetric units
* XformHeightInHimetricToPixels Converts an int height from HiMetric units
*
* CommitStorage Commits all changes in a docfile
* CreateChildStorage Creates child storage in another storage
* OpenChildStorage Opens child storage in another storage
*
*
* Copyright (c)1992 Microsoft Corporation, All Right Reserved
*/
#include "precomp.h"
#include <stdlib.h>
//Internal function to this module. No need for UNICODE in this function
static LPSTR GetWord(LPSTR lpszSrc, LPSTR lpszDst);
/*
* XformWidthInHimetricToPixels
* XformHeightInHimetricToPixels
*
* Functions to convert an int between a device coordinate system and
* logical HiMetric units.
*
* Parameters:
* hDC HDC providing reference to the pixel mapping. If
* NULL, a screen DC is used.
*
* Size Functions:
* lpSizeSrc LPSIZEL providing the structure to convert.
* lpSizeDst LPSIZEL providing the structure to receive converted
* units.
*
* Width Functions:
* iWidth int containing the value to convert.
*
* Return Value:
* Size Functions: None
* Width Functions: Converted value of the input parameters.
*
* NOTE:
* When displaying on the screen, Window apps display everything enlarged
* from its actual size so that it is easier to read. For example, if an
* app wants to display a 1in. horizontal line, that when printed is
* actually a 1in. line on the printed page, then it will display the line
* on the screen physically larger than 1in. This is described as a line
* that is "logically" 1in. along the display width. Windows maintains as
* part of the device-specific information about a given display device:
* LOGPIXELSX -- no. of pixels per logical in along the display width
* LOGPIXELSY -- no. of pixels per logical in along the display height
*
* The following formula converts a distance in pixels into its equivalent
* logical HIMETRIC units:
*
* DistInHiMetric = (HIMETRIC_PER_INCH * DistInPix)
* -------------------------------
* PIXELS_PER_LOGICAL_IN
*
*/
STDAPI_(int) XformWidthInHimetricToPixels(HDC hDC, int iWidthInHiMetric)
{
int iXppli; //Pixels per logical inch along width
int iWidthInPix;
BOOL fSystemDC=FALSE;
if (NULL==hDC)
{
hDC=GetDC(NULL);
fSystemDC=TRUE;
}
iXppli = GetDeviceCaps (hDC, LOGPIXELSX);
//We got logical HIMETRIC along the display, convert them to pixel units
iWidthInPix = MAP_LOGHIM_TO_PIX(iWidthInHiMetric, iXppli);
if (fSystemDC)
ReleaseDC(NULL, hDC);
return iWidthInPix;
}
STDAPI_(int) XformHeightInHimetricToPixels(HDC hDC, int iHeightInHiMetric)
{
int iYppli; //Pixels per logical inch along height
int iHeightInPix;
BOOL fSystemDC=FALSE;
if (NULL==hDC)
{
hDC=GetDC(NULL);
fSystemDC=TRUE;
}
iYppli = GetDeviceCaps (hDC, LOGPIXELSY);
//* We got logical HIMETRIC along the display, convert them to pixel units
iHeightInPix = MAP_LOGHIM_TO_PIX(iHeightInHiMetric, iYppli);
if (fSystemDC)
ReleaseDC(NULL, hDC);
return iHeightInPix;
}
/* GetWord
* -------
*
* LPSTR lpszSrc - Pointer to a source string
* LPSTR lpszDst - Pointer to destination buffer
*
* Will copy one space-terminated or null-terminated word from the source
* string to the destination buffer.
* returns: pointer to next character following the word.
*/
static LPSTR GetWord(LPSTR lpszSrc, LPSTR lpszDst)
{
while (*lpszSrc && !(*lpszSrc == ' ' || *lpszSrc == '\t' || *lpszSrc == '\n'))
*lpszDst++ = *lpszSrc++;
*lpszDst = '\0';
return lpszSrc;
}
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