Shader Compiler Texture Fetch Optimization
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Solution Overview
Problem
Conventional graphics processors experience performance limitations due to unnecessary texture fetches, which consume bandwidth and resources, especially when processing partially covered pixel groups, leading to inefficient graphics processing and increased power consumption.
Innovation Solution
Performing data-flow analysis of shader programs to identify necessary texture fetches and enabling or disabling fetches for uncovered pixels based on filtering modes, thereby optimizing texture data fetching and reducing unnecessary operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If texture fetches are performed for all pixels in a pixel group, then complete texture data is available for processing, but unnecessary fetches for uncovered pixels increase bandwidth usage and reduce processing performance
Solution Approach 1:
The patent extracts and identifies only the necessary texture fetches by performing data-flow analysis on the shader program. It separates covered pixels requiring texture data from uncovered pixels that do not, enabling selective fetching that eliminates unnecessary operations and reduces power consumption.
Solution Approach 2:
Instead of performing complete texture fetches for all pixels in a pixel group, the patent applies partial action by fetching texture data only for the subset of covered pixels that actually require it. This partial fetching approach avoids the excessive action of fetching data for uncovered pixels that will not be processed.
2Reliability
If texture data is fetched for uncovered pixels, then all possible texture data is available, but bandwidth between graphics memory device and processor is wasted
Solution Approach 1:
The patent extracts precise information about which pixels are covered and which texture fetches are necessary. By taking out only the essential fetch operations and eliminating redundant ones for uncovered pixels, it maintains necessary data availability while significantly reducing bandwidth consumption.
Solution Approach 2:
The patent changes the parameter of texture fetch execution by conditionally enabling or disabling fetches based on pixel coverage status. This parameter change allows the system to adapt bandwidth usage dynamically, fetching data only when and where it is actually needed rather than uniformly for all pixels.
3Productivity
If data-flow analysis is performed to identify necessary texture fetches, then unnecessary fetches are eliminated, but additional processing steps are required
Solution Approach 1:
The patent performs data-flow analysis as a preliminary action during shader program compilation or configuration, before actual rendering occurs. This advance analysis identifies which texture fetches are necessary, allowing the system to optimize subsequent rendering operations without adding complexity during the time-critical rendering phase.
Data Source
AI summary
Systems and methods for avoiding unnecessary uncovered texture fetches may improve texture mapping performance. A shader program compiler performs data-flow analysis to determine if texture fetches may be required for pixels that are not covered by a graphics primitive fragment. A graphics driver then determines which texture maps do not require texels for uncovered neighbor pixels, dependent on texture filter mode information, thereby avoiding unnecessary uncovered texture fetches.