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kikuchan / pngle

Pngle - PNG Loader for Embedding
MIT License
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How to speed up computation #6

Closed Gornerrrrr closed 1 year ago

Gornerrrrr commented 1 year ago

I'm use stm32f407 and this lib to decode PNG pictures and output RGB signals. The lib work very well :) But i want to speed up the decoding(now 2k picture -> 7s) . My picture format is fixed 2k 8 Bit depth. Have any modification suggestions for reference? Thanks!

Gornerrrrr commented 1 year ago

The test picture storage in RAM. Size= 15.9kb; High= 1440; Width= 2560; Decoding time= 7262ms;

kikuchan commented 1 year ago

Hi, thank you for using the library! :)

Please take a look at https://github.com/lovyan03/LovyanGFX/blob/master/src/lgfx/utility/lgfx_pngle.c This is a tuned version of pngle for speed, presented by @lovyan03 So you can find the something.

Good luck! :+1:

Gornerrrrr commented 1 year ago

Hi, thank you for using the library! :)

Please take a look at https://github.com/lovyan03/LovyanGFX/blob/master/src/lgfx/utility/lgfx_pngle.c This is a tuned version of pngle for speed, presented by @lovyan03 So you can find the something.

Good luck! 👍

Thanks help! I'm try replacing this library. Now same 2k picture decoding just need 800ms. 👍