From 371a9b53c39af36f77a1bedec15befdbd005f12d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Kr=C3=A1l?= <tomas@kral.hk>
Date: Sat, 15 May 2021 21:31:11 +0200
Subject: [PATCH] fix u64::MAX error on older compilers

---
 src/decoder/mod.rs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/decoder/mod.rs b/src/decoder/mod.rs
index 4d42499..42c52e0 100644
--- a/src/decoder/mod.rs
+++ b/src/decoder/mod.rs
@@ -1029,16 +1029,16 @@ impl<R: Read + Seek> Decoder<R> {
     fn invert_colors(buf: &mut DecodingBuffer, color_type: ColorType) {
         match (color_type, buf) {
             (ColorType::Gray(64), DecodingBuffer::U64(ref mut buffer)) => {
-                Self::invert_colors_unsigned(buffer, u64::MAX);
+                Self::invert_colors_unsigned(buffer, 0xffff_ffff_ffff_ffff);
             }
             (ColorType::Gray(32), DecodingBuffer::U32(ref mut buffer)) => {
-                Self::invert_colors_unsigned(buffer, u32::MAX);
+                Self::invert_colors_unsigned(buffer, 0xffff_ffff);
             }
             (ColorType::Gray(16), DecodingBuffer::U16(ref mut buffer)) => {
-                Self::invert_colors_unsigned(buffer, u16::MAX);
+                Self::invert_colors_unsigned(buffer, 0xffff);
             }
             (ColorType::Gray(n), DecodingBuffer::U8(ref mut buffer)) if n <= 8 => {
-                Self::invert_colors_unsigned(buffer, u8::MAX);
+                Self::invert_colors_unsigned(buffer, 0xff);
             }
             (ColorType::Gray(32), DecodingBuffer::F32(ref mut buffer)) => {
                 Self::invert_colors_fp(buffer, 1.0);