LGFX_PPA

This library provides a M5GFX/LovyanGFX layer for PPA, the pixel-processing accelerator module shipped with ESP32-P4 for fast image rotation, scaling, mirroring, and blending.

Requirements:

• ESP32-P4
• MIPI/DSI panel supported by M5Unified or LovyanGFX (e.g. M5Stack Tab5)
• PSRAM (minimum 4MB)
• esp-idf version >= 5.4

Usage

See examples folder.

Developer notes

PPA_Sprite inherits from LGFX_Sprite, however the buffer is aligned specially for ppa operation, and the bit depth is limited to 16-24-32 bits colors.

Known bugs

• ppa operations trigger screen flashes with arduino-esp32 v3.3.0 => downgrade to arduino-esp32 v3.2.1
• ppa_srm crashes when mirror_x or mirror_y is set and rotation is odd => wait for arduino-esp32 v3.3.1
• ppa_srm output may be misaligned when reused by ppa_blend => wait for arduino-esp32 v3.3.1

Resources:

• https://github.com/Lovyan03/LovyanGFX
• https://github.com/M5Stack/M5GFX
• https://docs.espressif.com/projects/esp-idf/en/stable/esp32p4/api-reference/peripherals/ppa.html