Exemplos de JXColormap::GetVisual em C++ (Cpp)

Exemplo n.º 1

JError
JXImage::CreateFromXPM
	(
	JXDisplay*			display,
	const JCharacter*	fileName,
	JXImage**			image
	)
{
#ifdef _J_HAS_XPM

	JXColormap* colormap = display->GetColormap();

	Pixmap image_pixmap = None;
	Pixmap mask_pixmap  = None;

	XpmAttributes attr;
	attr.valuemask          = XpmVisual | XpmColormap | XpmDepth |
							  XpmExactColors | XpmCloseness |
							  XpmColorKey | XpmAllocCloseColors |
							  XpmReturnAllocPixels;
	attr.visual             = colormap->GetVisual();
	attr.colormap           = colormap->GetXColormap();
	attr.depth              = display->GetDepth();
	attr.color_key          = XPM_COLOR;
	attr.alloc_pixels       = NULL;
	attr.nalloc_pixels      = 0;
	attr.alloc_close_colors = kJTrue;	// so we can free all resulting pixels
	attr.exactColors        = 1;
	attr.closeness          = 0;

	const int xpmErr =
		XpmReadFileToPixmap(*display, display->GetRootWindow(),
							const_cast<JCharacter*>(fileName),
							&image_pixmap, &mask_pixmap, &attr);
	if (xpmErr == XpmOpenFailed && JFileExists(fileName))
		{
		return JAccessDenied(fileName);
		}
	else if (xpmErr == XpmOpenFailed)
		{
		return JDirEntryDoesNotExist(fileName);
		}
	else if (xpmErr == XpmFileInvalid)
		{
		return FileIsNotXPM(fileName);
		}
	else if (xpmErr == XpmNoMemory)
		{
		return JNoProcessMemory();
		}
	else if (xpmErr == XpmColorFailed || xpmErr == XpmColorError)
		{
		if (image_pixmap != None)
			{
			XFreePixmap(*display, image_pixmap);
			}
		if (mask_pixmap != None)
			{
			XFreePixmap(*display, mask_pixmap);
			}
		if (attr.alloc_pixels != NULL)
			{
			XFreeColors(*display, attr.colormap, attr.alloc_pixels, attr.nalloc_pixels, 0);
			}
		XpmFreeAttributes(&attr);
		return TooManyColors();
		}

	// create image and mask

	*image = new JXImage(display, image_pixmap);
	assert( *image != NULL );

	XFreePixmap(*display, image_pixmap);

	if (mask_pixmap != None)
		{
		JXImageMask* mask = new JXImageMask(display, mask_pixmap);
		assert( mask != NULL );
		(**image).SetMask(mask);

		XFreePixmap(*display, mask_pixmap);
		}

	// free pixels so X has usage count of 1

	XFreeColors(*display, attr.colormap, attr.alloc_pixels, attr.nalloc_pixels, 0);

	// clean up

	XpmFreeAttributes(&attr);
	return JNoError();

#else

	return XPMNotAvailable();

#endif
}