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Bad compression ratio for PNG images #847

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mipastgt opened this issue Dec 15, 2023 · 0 comments
Open

Bad compression ratio for PNG images #847

mipastgt opened this issue Dec 15, 2023 · 0 comments

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@mipastgt
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Skia can encode images into a ByteArray. I noticed however that doing that for PNG images results in much larger images than usual. Something seems to be wrong with the compression. Attached please find a full project to reproduce this issue. The original image is already a PNG with a size of 870_254 bytes. After reading that in and storing again as PNG image its size becomes a whopping 1_291_525 bytes. There must be something wrong with the compression or its settings. Playing with the quality setting only makes things even worse.

Tested on
macOS Sonoma 14.1.2
kotlin.version=1.9.21
agp.version=8.1.4
compose.version=1.6.0-dev1334

PNGSizeDemo.zip
@mipastgt mipastgt changed the title Bad compression ration for PNG images Bad compression ratio for PNG images Dec 15, 2023
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@mipastgt