1df543d48d
## Summary Replace per-pixel getRenderMode() + rotateCoordinates() + bounds checks with a DirectPixelWriter struct that pre-computes orientation and render mode state once per row. Use bitwise ops instead of division/modulo for cache pixel packing. Skip PNG cache allocation when buffer exceeds 48KB (framebuffer size) since PNG decode is fast enough that caching provides minimal benefit, and the large buffer competes with the 44KB PNG decoder for heap. ## Additional Context Measured improvements on ESP32-C3 @ 160MHz: - JPEG decode: 5-7% faster (1:1 scale) - PNG decode: 15-20% faster (1:1 scale) - Cache renders: 3-6% faster across both formats - Eliminates "Failed to allocate cache buffer" errors for large PNGs --- ### AI Usage While CrossPoint doesn't have restrictions on AI tools in contributing, please be transparent about their usage as it helps set the right context for reviewers. Did you use AI tools to help write this code? _**< PARTIALLY >**_
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PlatformIO will compile them to static libraries and link into the executable file.
The source code of each library should be placed in a separate directory
("lib/your_library_name/[Code]").
For example, see the structure of the following example libraries `Foo` and `Bar`:
|--lib
| |
| |--Bar
| | |--docs
| | |--examples
| | |--src
| | |- Bar.c
| | |- Bar.h
| | |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
| |
| |--Foo
| | |- Foo.c
| | |- Foo.h
| |
| |- README --> THIS FILE
|
|- platformio.ini
|--src
|- main.c
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```
#include <Foo.h>
#include <Bar.h>
int main (void)
{
...
}
```
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