The following console application creates an
Image object based on a JPEG file. The code obtains the horizontal resolution of the image by calling the
GdipGetImageHorizontalResolution function.
C++
#include <windows.h>
#include <gdiplus.h>
#include <stdio.h>
using namespace Gdiplus;
INT main()
{
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
Image* image = new Image(L"Crayons.jpg");
REAL res = image->GetHorizontalResolution();
printf("The horizontal resolution is %f dots per inch.\n", res);
delete image;
GdiplusShutdown(gdiplusToken);
return 0;
}
#COMPILE EXE
#DIM ALL
#INCLUDE "GDIPLUS.INC"
' ========================================================================================
' Main
' ========================================================================================
FUNCTION PBMAIN
LOCAL hStatus AS LONG
LOCAL token AS DWORD
LOCAL StartupInput AS GdiplusStartupInput
LOCAL pImage AS DWORD
LOCAL strFileName AS STRING
LOCAL res AS SINGLE
' // Initialize GDI+
StartupInput.GdiplusVersion = 1
hStatus = GdiplusStartup(token, StartupInput, BYVAL %NULL)
IF hStatus THEN
PRINT "Error initializing GDI+"
EXIT FUNCTION
END IF
strFileName = UCODE$("Shapes.jpg")
hStatus = GdipLoadImageFromFile(STRPTR(strFileName), pImage)
hStatus = GdipGetImageHorizontalResolution(pImage, res)
PRINT "The horizontal resolution is" & STR$(res) & " dots per inch."
' // Cleanup
IF pImage THEN GdipDisposeImage(pImage)
' // Shutdown GDI+
GdiplusShutdown token
WAITKEY$
END FUNCTION
' ========================================================================================