// Last updated 2010/08/05 09:50

/*
https://imagemagick.org.cn/discourse-server/viewtopic.php?f=10&t=12285
and more recently: https://imagemagick.org.cn/discourse-server/viewtopic.php?f=1&t=16783
https://imagemagick.org.cn/Usage/channels/#masked_compose
Replicate a masked composite:
	convert -size 100x100 tile:tile_water.jpg tile:tile_disks.jpg \
		mask_bite.png -composite compose_masked.png

When doing composites in C it is best to think of the order that is used
in the convert command because that is the order you will specify them in
the MagickCompositeImage function.
*/
#include <windows.h>
#include <wand/magick_wand.h>
void test_wand(LPTSTR lpCmdLine)
{
	MagickWand *dest = NULL, *src = NULL, *mask = NULL;

	MagickWandGenesis();

	/* Create the wands */
	dest = NewMagickWand();
	mask = NewMagickWand();
	src = NewMagickWand();
	MagickSetSize(dest,100,100);
	MagickSetSize(src,100,100);

	MagickReadImage(dest,"tile:tile_water.jpg");
	MagickReadImage(mask,"mask_bite.png");
	// When you create a mask, you use white for those parts that you want
	// to show through and black for those which must not show through.
	// But internally it's the opposite so the mask must be negated
	MagickNegateImage(mask,MagickFalse);
	MagickSetImageClipMask(dest,mask);

	MagickReadImage(src,"tile:tile_disks.jpg");
	// This does the src (overlay) over the dest (background)
	MagickCompositeImage(dest,src,OverCompositeOp,0,0);

	MagickWriteImage(dest,"clip_out.jpg");

	/* Tidy up */
	if(dest)dest = DestroyMagickWand(dest);
	if(mask)mask = DestroyMagickWand(mask);
	if(src)src = DestroyMagickWand(src);
	MagickWandTerminus();
}