Developer fix for image resize problem required (set wallpaper)

Basically the above is the horrendous situation were you cannot reduce the image size and problem we have nowadays with mobile phones. You find an image you want to set as your home lockscreen or wallpaper and although you can zoom in on a file, you cannot zoom out, and thus you are forced to crop and it becomes a huge mess because you cannot fit in the screen the picture that you want, why the hell is this? I mean you can zoom in with pictures, but not zoom out?

Oh lord, is there any smart android developer who can please implement a solution to galleries and set as image in browsers, that can also 'reduce' the image size by zooming out, so that we don't have to do cropping on our modern mobile phones? And just say ' zoom out, then set image as wallpaper. So that the picture will fit without hassling!