Image forming apparatus and recording medium suitable for image forming processing based on PDL (page description language) which generates a display list using a speculative process before data analysis of an object of PDL is completed
First Claim
1. An image forming apparatus comprising a control unit which is a processor that controls operation of the image forming apparatus by reading an application program stored in memory, wherein the control unit comprises:
- a first rendering core for executing data analysis of an object of PDL format printing information;
a second rendering core for starting a speculative process for generating a Display List for the object before the data analysis is completed; and
a third rendering core for executing a rendering process based on the Display List generated by the second rendering core;
whereinthe first rendering core (i) acquires a rendering command for the object by executing the data analysis, (ii) acquires a path of the object wherein the path is included in the rendering command, and (iii) acquires a first setting value of a graphics attribute based on the rendering command;
the second rendering core, (i) after registering the path, generates the Display List by using a default setting value of the graphics attribute by the speculative process, (ii) when the default setting value of the graphics attribute is different from the first setting value of the graphics attribute based on the rendering command, determines that the speculative process for generating the Display List is a failure, and (iii) generates the Display List again by using the first setting value of the graphics attribute based on the rendering command by executing the data analysis; and
the data analysis by the first rendering core and the speculative process by the second rendering core are executed in parallel processing.
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Accused Products
Abstract
Provided is an image forming apparatus for further speeding up an image forming process. A first rendering core of a rendering core module executes data analysis of an object of PDL format printing information. A second rendering core executes a speculative process for generating a Display List for an object. A third rendering core executes a rendering process for a printout or display output based on the Display List generated by the second rendering core. In addition, data analysis by the first rendering core and the speculative process by the second rendering core are executed in parallel processing. As a result, the second rendering core can execute the generation of a Display List by a speculative process even without receiving a rendering command from the first rendering core.
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Citations
3 Claims
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1. An image forming apparatus comprising a control unit which is a processor that controls operation of the image forming apparatus by reading an application program stored in memory, wherein the control unit comprises:
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a first rendering core for executing data analysis of an object of PDL format printing information; a second rendering core for starting a speculative process for generating a Display List for the object before the data analysis is completed; and a third rendering core for executing a rendering process based on the Display List generated by the second rendering core;
whereinthe first rendering core (i) acquires a rendering command for the object by executing the data analysis, (ii) acquires a path of the object wherein the path is included in the rendering command, and (iii) acquires a first setting value of a graphics attribute based on the rendering command; the second rendering core, (i) after registering the path, generates the Display List by using a default setting value of the graphics attribute by the speculative process, (ii) when the default setting value of the graphics attribute is different from the first setting value of the graphics attribute based on the rendering command, determines that the speculative process for generating the Display List is a failure, and (iii) generates the Display List again by using the first setting value of the graphics attribute based on the rendering command by executing the data analysis; and the data analysis by the first rendering core and the speculative process by the second rendering core are executed in parallel processing. - View Dependent Claims (2)
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3. A recording medium that is a non-transitory computer-readable recording medium for storing an image forming program executable on a computer of an image forming apparatus wherein the image forming apparatus comprises a control unit which is a processor and comprises a first rendering core, a second rendering core, and a third rendering core, and when the computer executes the image forming program:
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the first rendering core executes data analysis of an object of PDL format printing information; the second rendering core starts a speculative process for generating a Display List for the object before the data analysis is completed; and the third rendering core executes a rendering process based on the Display List generated by the second rendering core;
whereinthe first rendering core (i) acquires a rendering command for the object by executing the data analysis, (ii) acquires a path of the object wherein the path is included in the rendering command, and (iii) acquires a first setting value of a graphics attribute based on the rendering command; the second rendering core, (i) after registering the path, generates the Display List by using a default setting value of the graphics attribute by the speculative process, (ii) when the default setting value of the graphics attribute is different from the first setting value of the graphics attribute based on the rendering command, determines that the speculative process for generating the Display List is a failure, and (iii) generates the Display List again by using the first setting value of the graphics attribute based on the rendering command by executing the data analysis; and the data analysis by the first rendering core and the speculative process by the second rendering core are executed in parallel processing.
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Specification