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// legacy.cpp
#include <windows.h>
#include "tLegacy.h"
/*
* RectConvertMappings
*
* Purpose:
* Converts the contents of a rectangle from device to logical
* coordinates where the hDC defines the logical coordinates.
*
* Parameters:
* pRect LPRECT containing the rectangle to convert.
* hDC HDC describing the logical coordinate system.
* if NULL, uses a screen DC in MM_LOMETRIC.
* fToDevice BOOL TRUE to convert from uConv to device,
* FALSE to convert device to uConv.
*
* Return Value:
* None
*/
void RectConvertMappings(LPRECT pRect, HDC hDC, BOOL fToDevice)
{
POINT rgpt[2];
BOOL fSysDC=FALSE;
if (NULL==pRect)
return;
rgpt[0].x=pRect->left;
rgpt[0].y=pRect->top;
rgpt[1].x=pRect->right;
rgpt[1].y=pRect->bottom;
if (NULL==hDC)
{
hDC=GetDC(NULL);
SetMapMode(hDC, MM_LOMETRIC);
fSysDC=TRUE;
}
if (fToDevice)
LPtoDP(hDC, rgpt, 2);
else
DPtoLP(hDC, rgpt, 2);
if (fSysDC)
ReleaseDC(NULL, hDC);
pRect->left=rgpt[0].x;
pRect->top=rgpt[0].y;
pRect->right=rgpt[1].x;
pRect->bottom=rgpt[1].y;
return;
}
STDAPI_(void) XformRectInHimetricToPixels(HDC hDC, LPRECT prcHiMetric
, LPRECT prcPix)
{
int iXppli; //Pixels per logical inch along width
int iYppli; //Pixels per logical inch along height
int iXextInHiMetric=(prcHiMetric->right-prcHiMetric->left);
int iYextInHiMetric=(prcHiMetric->bottom-prcHiMetric->top);
BOOL fSystemDC=FALSE;
if (NULL==hDC || GetDeviceCaps(hDC, LOGPIXELSX) == 0)
{
hDC=GetDC(NULL);
fSystemDC=TRUE;
}
iXppli=GetDeviceCaps (hDC, LOGPIXELSX);
iYppli=GetDeviceCaps (hDC, LOGPIXELSY);
//We got pixel units, convert them to logical HIMETRIC along the display
prcPix->right=MAP_LOGHIM_TO_PIX(iXextInHiMetric, iXppli);
prcPix->top =MAP_LOGHIM_TO_PIX(iYextInHiMetric, iYppli);
prcPix->left =0;
prcPix->bottom= 0;
if (fSystemDC)
ReleaseDC(NULL, hDC);
return;
}
/*
* INOLE_SetIconInCache
*
* Purpose:
* Stores an iconic presentation metafile in the cache.
*
* Parameters:
* pObj IUnknown * of the object.
* hMetaPict HGLOBAL containing the presentation.
*
* Return Value:
* HRESULT From IOleCache::SetData.
*/
#if 0
STDAPI INOLE_SetIconInCache(IUnknown *pObj, HGLOBAL hMetaPict)
{
IOleCache *pCache;
FORMATETC fe;
STGMEDIUM stm;
HRESULT hr;
if (NULL==hMetaPict)
return ResultFromScode(E_INVALIDARG);
if (FAILED(pObj->QueryInterface(IID_IOleCache, (void **)&pCache)))
return ResultFromScode(E_NOINTERFACE);
SETFormatEtc(fe, CF_METAFILEPICT, DVASPECT_ICON, NULL
, TYMED_MFPICT, -1);
stm.tymed=TYMED_MFPICT;
stm.hGlobal=hMetaPict;
stm.pUnkForRelease=NULL;
hr=pCache->SetData(&fe, &stm, FALSE);
pCache->Release();
return hr;
}
#endif
/*
* XformRectInPixelsToHimetric
* XformRectInHimetricToPixels
*
* Purpose:
* Convert a rectangle between pixels of a given hDC and HIMETRIC units
* as manipulated in OLE. If the hDC is NULL, then a screen DC is used
* and assumes the MM_TEXT mapping mode.
*
* Parameters:
* hDC HDC providing reference to the pixel mapping. If
* NULL, a screen DC is used.
* prcPix LPRECT containng the rectangles to convert.
* prcHiMetric
*
* Return Value:
* None
*
* 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
*
* Rect in Pixels (MM_TEXT):
*
* 0---------- X
* |
* | 1) ------------------ ( 2 P1=(rc.left, rc.top)
* | | | P2=(rc.right, rc.top)
* | | | P3=(rc.left, rc.bottom)
* | | | P4=(rc.right, rc.bottom)
* | |
* Y | |
* 3) ------------------ ( 4
*
* NOTE: Origin =(P1x, P1y)
* X extent=P4x - P1x
* Y extent=P4y - P1y
*
*
* Rect in Himetric (MM_HIMETRIC):
*
*
* 1) ------------------ ( 2 P1=(rc.left, rc.top)
* Y | | P2=(rc.right, rc.top)
* | | P3=(rc.left, rc.bottom)
* | | | P4=(rc.right, rc.bottom)
* | | |
* | | |
* | 3) ------------------ ( 4
* |
* 0---------- X
*
* NOTE: Origin =(P3x, P3y)
* X extent=P2x - P3x
* Y extent=P2y - P3y
*
*
*/
STDAPI_(void) XformRectInPixelsToHimetric(HDC hDC, LPRECT prcPix
, LPRECT prcHiMetric)
{
int iXppli; //Pixels per logical inch along width
int iYppli; //Pixels per logical inch along height
int iXextInPix=(prcPix->right-prcPix->left);
int iYextInPix=(prcPix->bottom-prcPix->top);
BOOL fSystemDC=FALSE;
if (NULL==hDC || GetDeviceCaps(hDC, LOGPIXELSX) == 0)
{
hDC=GetDC(NULL);
fSystemDC=TRUE;
}
iXppli=GetDeviceCaps (hDC, LOGPIXELSX);
iYppli=GetDeviceCaps (hDC, LOGPIXELSY);
//We got pixel units, convert them to logical HIMETRIC along the display
prcHiMetric->right=MAP_PIX_TO_LOGHIM(iXextInPix, iXppli);
prcHiMetric->top =MAP_PIX_TO_LOGHIM(iYextInPix, iYppli);
prcHiMetric->left =0;
prcHiMetric->bottom =0;
if (fSystemDC)
ReleaseDC(NULL, hDC);
return;
}
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