HELP MM to Pixel conversion

[devwin2004]

Dear coleague

I need an example to convert de 297.4 mm x 210,0 mm to pixel or viceversa in 800 x 600 screen resolution Somebody have one to
send me or tell me how can i do that

Thanks
Dante
devwin2004@yahoo.com.ar

[Rafael Clemente]

Just scan at 70 dpi and you will get an image of approx. 800 x 600 pixel. However, I suspect that it will be barely readable on the screen and too low in quality for printing full size.
Is this what you needed?
Rafael

[Romeo]

hi,
CAN YOU HELP ME TO GET DPI from a generic bmp files ?
tks
Romeo

[FiveWiDi]

Dear coleague

I need an example to convert de 297.4 mm x 210,0 mm to pixel or viceversa in 800 x 600 screen resolution Somebody have one to
send me or tell me how can i do that

Thanks
Dante
devwin2004@yahoo.com.ar

Perhaps, this can help you:

Code: Select all | Expand

#include "FiveWin.ch"

#define HORZSIZE          4
#define VERTSIZE          6
#define HORZRES           8
#define VERTRES          10
#define LOGPIXELSX       88
#define LOGPIXELSY       90


/* ****************************************************************************
Funciones para convertir PIXEL a Twip/Pulgadas/Centímetros y viceversa.

hDC -> oWnd:hDC or oPrn:hDC

   ************************************************************************* */

/* ******************************************************* */
FUNCTION nPixels2Twips( hDC, nPixels, lVertical )
Return (nPixels / GetDeviceCaps( hDC, If(lVertical, LOGPIXELSY, LOGPIXELSX) ) ) * 1440
/* ******************************************************* */
FUNCTION nTwips2Pixels( hDC, nTwips, lVertical )
Return (nTwips / 1440) * GetDeviceCaps( hDC, If(lVertical, LOGPIXELSY, LOGPIXELSX) )
/* ******************************************************* */
FUNCTION nPixels2Inches( hDC, nPixels, lVertical )
Return (nPixels / GetDeviceCaps( hDC, If(lVertical, LOGPIXELSY, LOGPIXELSX) ) )
/* ******************************************************* */
FUNCTION nInches2Pixels( hDC, nInches, lVertical )
Return (nInches * GetDeviceCaps( hDC, If(lVertical, LOGPIXELSY, LOGPIXELSX) ) )
/* ******************************************************* */
FUNCTION nPixels2Cm( hDC, nPixels, lVertical )
Return nPixels2Inches( hDC, nPixels, lVertical ) * 2.54
/* ******************************************************* */
FUNCTION nCm2Pixels( hDC, nCm, lVertical )
Return nInches2Pixels( hDC, (nCm / 2.54), lVertical )
/* ******************************************************* */
FUNCTION uCm2Pixels( HdC, nCmy, nCmx )
nCmy := nCm2Pixels( hDC, nCmy, .T. )
nCmx := nCm2Pixels( hDC, nCmx, .F. )
Return Nil 

Regards
Carlos G.

[Silvio]

Certainly this is very strange because all I have always said that I could see a white window, with the measures expressed in cm in pixels simulating a page printer, if not with the state an object instead oprn with these functions can be done now perhaps better with mine designer report