serenity

RGBCube/serenity

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Author	SHA1	Message	Date
Lucas CHOLLET	cc1bd2d2d9	LibGfx/JPEG: Use a look-up table for cosine values This solution is a middle ground between re-computing `cos` every time and a much more mathematically complicated approach (as we have in the decoder). While still being far from optimal it already gives us a 10x improvement, not that bad :^) Co-authored-by: Tim Flynn <trflynn89@pm.me>	2023-06-25 00:22:21 +02:00
Lucas CHOLLET	226b214142	LibGfx/JPEG: Add a JPEG encoder :^) This encoder is very naive as it only output SOF0 images and uses pre-defined Huffman tables. There is also a small bug with quantization which make using it over-degrade the quality.	2023-06-22 21:13:04 +02:00

Author

SHA1

Message

Date

Lucas CHOLLET

cc1bd2d2d9

LibGfx/JPEG: Use a look-up table for cosine values

This solution is a middle ground between re-computing `cos` every time
and a much more mathematically complicated approach (as we have in the
decoder).

While still being far from optimal it already gives us a 10x
improvement, not that bad :^)

Co-authored-by: Tim Flynn <trflynn89@pm.me>

2023-06-25 00:22:21 +02:00

Lucas CHOLLET

226b214142

LibGfx/JPEG: Add a JPEG encoder :^)

This encoder is very naive as it only output SOF0 images and uses
pre-defined Huffman tables.

There is also a small bug with quantization which make using it
over-degrade the quality.

2023-06-22 21:13:04 +02:00

2 commits