Display List Optimization via Command Filtering
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Solution Overview
Problem
Existing graphics rendering systems face inefficiencies due to the execution of redundant and unnecessary commands in display lists, which can significantly increase processing burdens and resource usage.
Innovation Solution
The system optimizes display lists by identifying and excluding sub-lists with no drawing commands and consolidating adjacent Restore commands into a single RestoreToCount command, ensuring only necessary commands are executed during rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a display list is constructed to include all drawing commands from application logic, then complete graphical rendering is achieved, but redundant and unnecessary commands are executed increasing processing overhead
Solution Approach 1:
The system performs preliminary analysis during display list construction to identify and flag sub-lists containing only state commands without drawing commands. This advance preparation allows the rendering engine to skip execution of these redundant sub-lists during actual rendering, eliminating wasted processing cycles while preserving complete graphical output.
Solution Approach 2:
The optimization applies selectively to specific sub-lists within the display list rather than uniformly to all commands. By analyzing each sub-list's command composition and identifying those with only state commands, the system applies skip-execution optimization locally where appropriate, maintaining rendering completeness for sub-lists that require execution while eliminating redundancy elsewhere.
2Reliability
If state commands are recorded in the display list for all rendering instructions, then proper rendering state is maintained, but unnecessary state commands increase the number of executed commands
Solution Approach 1:
During display list construction, the system performs preliminary analysis to identify state commands that are redundant given the surrounding commands and rendering context. State commands that would not affect the final rendering outcome are flagged and excluded from the recorded display list, reducing command count while preserving rendering accuracy.
Solution Approach 2:
The system discards redundant state commands from the display list during the recording phase, keeping only those state commands that are necessary for proper rendering. The rendering engine recovers the necessary rendering state information through selective execution of non-redundant commands, maintaining rendering fidelity with fewer commands.
3Reliability
If adjacent Restore commands are executed separately, then rendering state is properly restored at each point, but processing time increases due to multiple command executions
Solution Approach 1:
The system merges adjacent Restore commands into a single consolidated Restore operation during display list construction. By combining multiple sequential Restore commands that restore to the same or overlapping save states, the system reduces the number of executed commands while ensuring that the rendering state is properly restored to the correct state at the appropriate time.
Solution Approach 2:
During the display list construction phase, the system performs preliminary analysis to identify sequences of adjacent Restore commands and consolidates them into optimized single commands. This advance consolidation reduces processing time during actual rendering while maintaining proper state restoration, as the merged commands are carefully constructed to preserve the necessary rendering state transitions.
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optimizing a display list. Graphics processing commands are identified for generation of one or more graphical images on a computer device. During an initial recording of a graphics display list to include the graphics processing commands, if a sub-list of the display list is determined to not include any drawing commands, the display list is recorded so that commands on the sub-list are not executed when the display list is executed.