GDI+: GdipRemovePropertyItem

[José Roca]

The following example creates an Image object based on a JPEG file. The code removes the PropertyTagImageTitle property item from the Image object by calling the GdipRemovePropertyItem function. The code calls GdipGetPropertyItemSize twice (once before and once after removing the item) to determine the size of the PropertyTagImageTitle property item. The code does not remove the property item from the image file; it removes the property item only from the Image object. To save the image (with the property item removed) to a new JPEG file, call the GdipSaveImageToFile function.

C++

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#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"FakePhoto3.jpg");
   UINT size = 0;

   size = image->GetPropertyItemSize(PropertyTagEquipMake);
   printf("The size of the PropertyTagEquipMake item is %u.\n", size);

   image->RemovePropertyItem(PropertyTagEquipMake);   

   size = image->GetPropertyItemSize(PropertyTagEquipMake);
   printf("The size of the PropertyTagEquipMake item is %u.\n", size);

   delete image;
   GdiplusShutdown(gdiplusToken);
   return 0;
}


PowerBASIC

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#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 nSize 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$("BERRY_Halle_Modified.jpg")
   hStatus = GdipLoadImageFromFile(STRPTR(strFileName), pImage)

   ' // Get the size of the image title
   hStatus = GdipGetPropertyItemSize(pImage, %PropertyTagImageTitle, nSize)
   PRINT "The size of the title is" & STR$(nSize) & " bytes."

   ' // Remove the title property.
   hStatus = GdipRemovePropertyItem(pImage, %PropertyTagImageTitle)

   ' // Get the size of the image title
   nSize = 0
   hStatus = GdipGetPropertyItemSize(pImage, %PropertyTagImageTitle, nSize)
   PRINT "The size of the title is" & STR$(nSize) & " bytes."

   ' // Cleanup
   IF pImage THEN GdipDisposeImage(pImage)

   ' // Shutdown GDI+
   GdiplusShutdown token

   WAITKEY$

END FUNCTION
' ========================================================================================