•Pattern—The design which is “painted” through the non-white area of the source image onto the destination image. The pattern is defined by the Current Pattern (?*v#T) command. It may be a color pattern or a single-plane monochrome mask, such as the printer's internal predefined shading or cross-hatch patterns, or a user-defined pattern. Foreground color is not applied to a user-defined color pattern.
When printing a page, text and raster images are printed using the current pattern. Once the current pattern is specified, it stays in effect until another is selected or the printer is reset. A reset returns the current pattern to its default value (100% black). The current pattern does not always apply to rectangular area fill, which uses patterns defined by the rectangular area fill pattern commands.
•Foreground Color—Foreground color is selected from the current palette using the Foreground Color command (?*v#S). Foreground color affects everything except user-defined color patterns and HP-GL/2 primitives. Raster color mixes with foreground color (see Chapter 6 “Color Raster Graphics”).
•Texture—Texture is another name for the combination of pattern and foreground color, or for a color pattern which is not combined with a foreground color.
•Source Image—the Source Image is an image in which the non-white bits are replaced by the specified pattern. The source image functions like a stencil through which the pattern is applied to the destination image. The source image may be one of the following: HP-GL/2 primitives, rules, characters, or raster images (single plane mask or multi-plane color)
•Destination Image—The image onto which the source image/texture combination is placed. The destination image includes any images placed through previous operations.
•Source Transparency Mode—The transparency or opaqueness of the source image’s “white” pixels as they are applied to the destination image (see the note below). Setting the source transparency mode to 1 (opaque) applies the source image's white pixels to the destination image; with a setting of 0 (transparent), these pixels have no effect on the destination.
