load-texture

Arguments: pathname &key (icon-index 0)

Reads a pixmap from any device-independent bitmap file. These are typically .bmp files. You can also load .ico (icon) files. If you are loading a .ico file, the icon-index keyword argument specifies which icon to read from the file. The value of icon-index must be a non-negative integer, where zero indicates the first icon in the file. icon-index defaults to zero. icon-index is ignored if you are not loading a .ico file.

load-texture returns three values. The first two are the texture and a texture-info. The texture-info contains a colormap read from the pixmap file and is therefore appropriate for passing along with the pixel-map to the function copy-pixels-to-stream in order to draw the pixel-map on a window in its original colors. The third returned value is nil when a .bmp file is loaded. When a .ico file is loaded, the third returned value is a bitmap mask that defines the transparent areas of the image. This mask bitmap can be passed along with the main pixmap to copy-pixels-with-mask-to-stream.

The function load-texture-info reads and returns the texture-info of the file without returning the pixmap. It allows you to get the texture-info quickly, if that is all you want.

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This page was not revised from the 10.0 page.
Created 2019.8.20.