copy-to-stream

Arguments: pixmap-or-cursor stream &optional to-box-or-position from-box-or-nil (mode po-replace)

Copies a pixmap object or a cursor object to stream. stream should be a cg-stream. This function replaces the older function copy-pixels-to-stream, which required the use of separate texture and texture-info objects.

If from-box-or-nil is a box, this function copies the from-box-or-nil portion of pixmap-or-cursor to the to-box-or-position portion of stream, using a particular pixel-combination mode. If from-box-or-nil is nil, the whole pixmap or cursor is copied.

If to-box-or-position is a box, the pixmap-or-cursor is copied to that box and is stretched (if necessary) as with copy-pixels-to-stream. If to-box-or-position is a position, then the pixmap or cursor is copied without stretching so its upper left corner is at the position. If to-box-or-position is nil (the default), then the pixmap or cursor is copied without stretching to position 0,0 of stream.

If pixmap-or-cursor has a mask texture, then copy-pixels-with-mask-to-stream is called internally in order to use it. Otherwise copy-pixels-to-stream is called internally. If pixmap-or-cursor has a pixmap-handle, then that is used for drawing the pixmap, and otherwise the pixmap's texture is used.

The existing symbols po-replace, po-paint, po-xor, po-invert, po-fill, and po-erase are bound to the commonly-used pixel-combination modes. A pixel-combination mode, or paint operation, is an integer that is used by the OS to determine how each pair of source and destination pixel colors map to a result color.

Instead of passing a pixmap object, a cursor object, pixmap handle, or a symbol bound to either a pixmap, cursor, or pixmap handle may be passed.

Copyright (c) 1998-2002, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 6.2. This page was not revised from the 6.1 page.
Created 2002.2.26.