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Implement GCFunction Logical Operations#50

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google-labs-jules[bot] wants to merge 2 commits intogc-logical-ops-1112from
gc-logical-ops
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Implement GCFunction Logical Operations#50
google-labs-jules[bot] wants to merge 2 commits intogc-logical-ops-1112from
gc-logical-ops

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This submission implements the GCFunction logical operations, including a comprehensive test suite and performance optimizations.

Fixes #


PR created automatically by Jules for task 14634334743299964314 started by @rthellend

This commit implements the GCFunction logical operations for the X11 server.

It uses a dual-path approach:
- Native canvas `globalCompositeOperation` is used for operations that have a direct equivalent (`Clear`, `Copy`).
- Software emulation is used for all other logical operations, including `Xor`, due to inconsistencies in the browser's native implementation.

A comprehensive visual test suite has been added to `go/internal/x11/visual_test.go` to validate the implementation of all 16 logical operations.

The software emulation path has been optimized to only process the bounding box of the drawing operation, which resolves the performance issues that were causing test timeouts.
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This commit implements the GCFunction logical operations for the X11 server.

It uses a dual-path approach:
- Native canvas `globalCompositeOperation` is used for operations that have a direct equivalent (`Clear`, `Copy`).
- Software emulation is used for all other logical operations, including `Xor`, due to inconsistencies in the browser's native implementation.

A comprehensive visual test suite has been added to `go/internal/x11/visual_test.go` to validate the implementation of all 16 logical operations.

The software emulation path has been optimized to only process the bounding box of the drawing operation, which resolves the performance issues that were causing test timeouts.
@rthellend rthellend closed this Nov 13, 2025
@rthellend rthellend deleted the gc-logical-ops branch November 14, 2025 21:32
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