| 摘要 |
Descriptions can describe or contain document contents and layout. Some contents can be images and, instead of being included as image data in the description, can be image references. An image reference can be used to obtain an image, in the form of image data, from an image server. A printer can print the document after obtaining needed images from image servers. The image data often contains an image whose resolution does not match the resolution that the printer can properly print in the document. The image server can prepare image data with the correct resolution or can stream image data through a data connection to the printer in a hierarchical image format. A printer can receive a stream of hierarchically formatted image data until a desired resolution is reached and then simply close the data connection to cut off the stream of image data.
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