From 05934f93b97742bfc08cb8758510ba2dc2ad14a4 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Tue, 11 Nov 2025 16:18:13 -0800
Subject: [PATCH] io_dec,CustomSetup: rm unnecessary 'is_alpha' check

`WebPIoInitFromOptions()` doesn't distinguish between `MODE_YUV` and
`MODE_YUVA`, only RGB vs YUV. Removing this check also removes a
confusing mix up between `MODE_YUV` and `MODE_YUVA` in the conditional.

Change-Id: Id46b21785433aded733ad914941398b0bd5d6b8f
---
 src/dec/io_dec.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/dec/io_dec.c b/src/dec/io_dec.c
index 10ead29a..d96d11aa 100644
--- a/src/dec/io_dec.c
+++ b/src/dec/io_dec.c
@@ -574,7 +574,9 @@ static int CustomSetup(VP8Io* io) {
   p->emit = NULL;
   p->emit_alpha = NULL;
   p->emit_alpha_row = NULL;
-  if (!WebPIoInitFromOptions(p->options, io, is_alpha ? MODE_YUV : MODE_YUVA)) {
+  // Note: WebPIoInitFromOptions() does not distinguish between MODE_YUV and
+  // MODE_YUVA, only RGB vs YUV.
+  if (!WebPIoInitFromOptions(p->options, io, /*src_colorspace=*/MODE_YUV)) {
     return 0;
   }
   if (is_alpha && WebPIsPremultipliedMode(colorspace)) {