TOPIC:

Well, it is so. Mimetype of tgraphic is always return 'image/png'.
The first image in tested TImage was png, and I wrote a code, that checks mimetype of TImage.Picture.graphic and did some manipulations. But after replacing PNG with BMP of GIF or JPG or whatever Mimetype is still png.
So, Is this a bug, or should I go and read some mans? Considering this it's the first one.

Anyway, could someone show me how to check what mimetype of image it is, cause I'm coing to draw on that image (not on timage.canvas, but timage.picture.png.canvas or timage.picture.bitmap.canvas or so...)

Now I've got it. I must perform picture.clear before loading any new image. At least it worked for me.