The following example creates an
Image object based on a JPEG file. The code calls the
GdipGetPropertyCount function of that Image object to find out how many properties are stored in the image. Then the code calls the
GdipGetPropertyIdList function to get a list of the property types.
C++
#include <windows.h>
#include <gdiplus.h>
#include <stdio.h>
using namespace Gdiplus;
INT main()
{
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
UINT count = 0;
Image* image = new Image(L"FakePhoto.jpg");
// How many types of metadata are in the image?
count = image->GetPropertyCount();
if(count == 0)
return 0;
// Allocate a buffer to receive an array of PROPIDs.
PROPID* propIDs = new PROPID[count];
image->GetPropertyIdList(count, propIDs);
// List the retrieved IDs.
for(UINT j = 0; j < count; ++j)
printf("%x\n", propIDs[j]);
delete [] propIDs;
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 count AS DWORD
LOCAL i AS LONG
DIM propIDs(0) AS DWORD
' // Initialize GDI+
StartupInput.GdiplusVersion = 1
hStatus = GdiplusStartup(token, StartupInput, BYVAL %NULL)
IF hStatus THEN
PRINT "Error initializing GDI+"
EXIT FUNCTION
END IF
strFileName = UCODE$("Shapes.jpg")
hStatus = GdipLoadImageFromFile(STRPTR(strFileName), pImage)
hStatus = GdipGetPropertyCount(pImage, count)
PRINT "Number of properties =" & STR$(count)
REDIM propIDs(count - 1)
hStatus = GdipGetPropertyIdList(pImage, count, propIDs(0))
FOR i = 0 TO count - 1
PRINT HEX$(propIDs(i))
NEXT
' // Cleanup
IF pImage THEN GdipDisposeImage(pImage)
' // Shutdown GDI+
GdiplusShutdown token
WAITKEY$
END FUNCTION
' ========================================================================================