Working With Screen Images

The routines described in the following sections offer the following ways to store and retrieve images:

• Transfer images between memory buffers and the screen

  Transferring images from buffers is a quick and flexible way to move things around the screen. Memory images can interact with the current screen image; for example, you can perform a logical AND of a memory image and the current screen or superimpose a negative of the memory image on the screen.

• Transfer images between the screen and Windows bitmap files

  Transferring images from files gives access to images created by other programs, and saves graphs and images for later use. However, images loaded from bitmap files overwrite the portion of the screen they are pasted into and retain the attributes they were created with, such as the color palette, rather than accepting current attributes.

• Transfer images between the screen and the Clipboard from the QuickWin Edit menu

  Editing screen images from the QuickWin Edit menu is a quick and easy way to move and modify images interactively on the screen, retaining the current screen attributes, and also provides temporary storage (the Clipboard) for transferring images among applications.

These routines allow you to cut, paste, and move images around the screen.