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## Problem `invertScreen()`, `storeBwBuffer()`, and `restoreBwBuffer()` dereference `frameBuffer` without NULL validation. If the display isn't initialized, these functions will crash. ## Fix Add NULL checks before using `frameBuffer` in all three functions. Follows the existing pattern from `drawPixel()` (line 11) which already validates the pointer. Changed `lib/GfxRenderer/GfxRenderer.cpp`. ## Test - Follows existing validated pattern from `drawPixel()` - No logic changes - only adds early return on NULL - Manual device testing appreciated |
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| EpdFont | ||
| Epub | ||
| expat | ||
| GfxRenderer | ||
| miniz | ||
| Serialization | ||
| Utf8 | ||
| ZipFile | ||
| README | ||
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