From bf95eb39c2d837e388dec66eb35d9ad1f1d70ca7 Mon Sep 17 00:00:00 2001
From: Surma <surma@surma.dev>
Date: Wed, 21 Jul 2021 16:16:44 +0100
Subject: [PATCH] Fix handling of PNGs that are not 8 bit

---
 codecs/png/pkg/squoosh_png_bg.wasm | Bin 123698 -> 123698 bytes
 codecs/png/src/lib.rs              |   6 +++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/codecs/png/pkg/squoosh_png_bg.wasm b/codecs/png/pkg/squoosh_png_bg.wasm
index 15d0ec0354dff815deb11bba1f17e20d3946a271..cc5cf3660e097015b9e777aaefe90cc4cc4b6e10 100644
GIT binary patch
delta 28
kcmdmVjD6EF_6>oP7%wyjP1+tbiSe~JqtAA`dyHRL0Kwx7wEzGB

delta 28
kcmdmVjD6EF_6>oP7#o^{CT$Oz#Q55q(Q~`qJ;pCA0K6^?VgLXD

diff --git a/codecs/png/src/lib.rs b/codecs/png/src/lib.rs
index d5eacfce..e23cf7dd 100644
--- a/codecs/png/src/lib.rs
+++ b/codecs/png/src/lib.rs
@@ -53,7 +53,11 @@ where
 #[wasm_bindgen]
 pub fn decode(mut data: &[u8]) -> ImageData {
     let mut decoder = png::Decoder::new(&mut data);
-    decoder.set_transformations(png::Transformations::EXPAND);
+    decoder.set_transformations(
+        png::Transformations::EXPAND | // Turn paletted images into RGB
+        png::Transformations::PACKING | // Turn images <8bit to 8bit
+        png::Transformations::STRIP_16, // Turn 16bit into 8 bit
+    );
     let (info, mut reader) = decoder.read_info().unwrap_throw();
     let num_pixels = (info.width * info.height) as usize;
     let mut buf = vec![0; num_pixels * 4];