how merge 2 PNG images in one

Anonymous

i need to merge two PNG images (loaded in memory) into one without lose the transparence of both (if there are some transparent area inside the first one or the second one or of both that are not mask by the other let it ). How can i do it? Then i need to get the final PNG file in memory and put it on a picturebox. It is really important, please help me if you. Thanks.

Niklas Ulvinge

Compare each pixel and make an OR operation. The PROgrammer Niklas Ulvinge aka IDK

iliyang

Well, here's what you can do: 1) create a new Image object (with the appropriate size) 2) get a Graphics object for it (Graphics.FromImage static method) 3) draw the first image on the new image (using the Graphics object) 4) draw the secons image on the new image 5) now you have an Image object that meets the requirements Or, if you don't need one of the images, draw the other one over it. Cheers ;)

Anonymous

3) draw the first image on the new image (using the Graphics object) 4) draw the secons image on the new image 5) now you have an Image object that meets the requirements 3) what method do i need to use? 4) what other now so to don't overwrite the whole first image?

iliyang

use the DrawImage method of the Graphics class 4) you don't need to do anything else special. If the image that you'll draw over the first one is transperant, GDI+ will draw it correctly with alpha blending. Don't worry, just try it. I have and it works just fine ;)

Anonymous

ok really thanks now the last thing: To create the right Image object to hanlde png 32 bit image how declaration syntax i have to use. Stop, tnx! :)