JNA Convert HICON to Java Image

I knwo there is already an question like this. But its solution was not suitable for me because with the Sehellfolder Methode you can only get 16x16 and 32x32 sized icons.
I have extracted a HICO with size of 256x256 and want to convert it into and Java Image like BufferedImage. I found and method for it to. But it does not work properly:

public static BufferedImage getIcon(final WinDef.HICON hIcon,int ICON_SIZE,short ICON_DEPTH,int ICON_BYTE_SIZE)
final int width = ICON_SIZE;
final int height = ICON_SIZE;
final short depth = ICON_DEPTH;
final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

final Memory lpBitsColor = new Memory(width * height * depth / ICON_BYTE_SIZE);
final Memory lpBitsMask = new Memory(width * height * depth / ICON_BYTE_SIZE);
final WinGDI.BITMAPINFO info = new WinGDI.BITMAPINFO();
final WinGDI.BITMAPINFOHEADER hdr = new WinGDI.BITMAPINFOHEADER();
info.bmiHeader = hdr;
hdr.biWidth = width;
hdr.biHeight = height;
hdr.biPlanes = 1;
hdr.biBitCount = depth;
hdr.biCompression = WinGDI.BI_RGB;

final WinDef.HDC hDC = User32.INSTANCE.GetDC(null);
final WinGDI.ICONINFO piconinfo = new WinGDI.ICONINFO();
User32.INSTANCE.GetIconInfo(hIcon, piconinfo);

GDI32.INSTANCE.GetDIBits(hDC, piconinfo.hbmColor, 0, height, lpBitsColor, info, WinGDI.DIB_RGB_COLORS);
GDI32.INSTANCE.GetDIBits(hDC, piconinfo.hbmMask, 0, height, lpBitsMask, info, WinGDI.DIB_RGB_COLORS);

int r, g, b, a, argb;
int x = 0, y = height - 1;
for (int i = 0; i < lpBitsColor.size(); i = i + 3) b;
image.setRGB(x, y, argb);
x = (x + 1) % width;
if (x == 0)
y--;



User32.INSTANCE.ReleaseDC(null, hDC);
GDI32.INSTANCE.DeleteObject(piconinfo.hbmColor);
GDI32.INSTANCE.DeleteObject(piconinfo.hbmMask);

return image;



Resulting Image

Do you know andy method that works better?

EDIT:

public static BufferedImage getImageByHICON(final int width, final int height, final WinNT.HANDLE hicon, final WinGDI.BITMAPINFOHEADER info)
final WinGDI.ICONINFO iconinfo = new WinGDI.ICONINFO();

try
// GDI32 g32 = GDI32.INSTANCE;

// get icon information

if (!User32.INSTANCE.GetIconInfo(new WinDef.HICON(hicon.getPointer()), iconinfo)) return null;
final WinDef.HWND hwdn = new WinDef.HWND();
final WinDef.HDC dc = User32.INSTANCE.GetDC(hwdn);

if (dc == null)

return null;
try
final int nBits = width * height * 4;
// final BitmapInfo bmi = new BitmapInfo(1);

final Memory colorBitsMem = new Memory(nBits);
// // Extract the color bitmap
final WinGDI.BITMAPINFO bmi = new WinGDI.BITMAPINFO();

bmi.bmiHeader.biWidth = width;
bmi.bmiHeader.biHeight = -height;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = WinGDI.BI_RGB;
GDI32.INSTANCE.GetDIBits(dc, iconinfo.hbmColor, 0, height, colorBitsMem, bmi, WinGDI.DIB_RGB_COLORS);
// g32.GetDIBits(dc, iconinfo.hbmColor, 0, size, colorBitsMem,
// bmi,
// GDI32.DIB_RGB_COLORS);
final int colorBits = colorBitsMem.getIntArray(0, width * height);
if (info.biBitCount < 32)
final Memory maskBitsMem = new Memory(nBits);
// // Extract the mask bitmap
GDI32.INSTANCE.GetDIBits(dc, iconinfo.hbmMask, 0, height, maskBitsMem, bmi, WinGDI.DIB_PAL_COLORS);
// g32.GetDIBits(dc, iconinfo.hbmMask, 0, size,
// maskBitsMem,
// bmi,
// // GDI32.DIB_RGB_COLORS);
final int maskBits = maskBitsMem.getIntArray(0, width * height);
// // // Copy the mask alphas into the color bits
for (int i = 0; i < colorBits.length; i++)
colorBits[i] = colorBits[i]

final BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
bi.setRGB(0, 0, width, height, colorBits, 0, height);
return bi;
finally
com.sun.jna.platform.win32.User32.INSTANCE.ReleaseDC(hwdn, dc);

finally
User32.INSTANCE.DestroyIcon(new WinDef.HICON(hicon.getPointer()));
GDI32.INSTANCE.DeleteObject(iconinfo.hbmColor);
GDI32.INSTANCE.DeleteObject(iconinfo.hbmMask);




Better Image

1 Answer
1

You need to use the method from Example 3 from this website

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