Wallpaper gallery plugin customization

Hello! I want to customize a wallpaper gallery plugin. the core features of plugin must be required as following—

1.The plugin will automatically count the pixels of visitor’s screen to adjust the size of the pictures on the wallpaper website to meet the pixels of visitor’s screen.

2.If the pixels of visitor’s screen are set as a special size, the plugin will automatically catch the size of visitor’s screen and adjust the ratio of picture by cropping the picture in reducing its height but keep its width. Meanwhile the size of the picture will be automatically zoomed out to meet the pixels of visitor’s screen. Visitors can select the area on the picture while cropping the picture.

3.If the original size of the picture is smaller than the pixels of visitor’s screen, the plugin will remind the visitor that the picture can’t be set as the wallpaper under visitor’s present screen pixel. The plugin will ONLY be activated when its original size of the picture is larger than visitor’s screen pixels.

4.The webmaster can set the watermark in text or picture format on anywhere of the pictures.

I’ve designed the look of front-end as JPEG pictures. The maker who accepts my order had better make both plugins and themes, because I also need to customize a theme with advertisement zones. If you accept my order, please contact my Facebook “cvcmart” I’ll send the detailed requirement to you! Then you may tell me the price according to my requirement, your payment methods and post sale service. Thank you!