From 1de4ba77745dc6dc6cd7fedf7811cb7159669cde Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Milo=C5=A1=20Komar=C4=8Devi=C4=87?=
 <4973094+kmilos@users.noreply.github.com>
Date: Fri, 28 Nov 2025 22:49:31 +0100
Subject: [PATCH] libultrahdr: add patch to fix clip in GL (#26600)

* libultrahdr: add patch to fix clip in GL

Equivalent to CPU code fix already upstream

* add URL for context

---------

Co-authored-by: Christoph Reiter <reiter.christoph@gmail.com>
---
 mingw-w64-libultrahdr/002-fix-gl-clip.patch | 11 +++++++++++
 mingw-w64-libultrahdr/PKGBUILD              | 10 +++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)
 create mode 100644 mingw-w64-libultrahdr/002-fix-gl-clip.patch

diff --git a/mingw-w64-libultrahdr/002-fix-gl-clip.patch b/mingw-w64-libultrahdr/002-fix-gl-clip.patch
new file mode 100644
index 0000000000..b9c5725621
--- /dev/null
+++ b/mingw-w64-libultrahdr/002-fix-gl-clip.patch
@@ -0,0 +1,11 @@
+--- a/lib/src/gpu/applygainmap_gl.cpp	2025-11-28 11:53:50.186642600 +0100
++++ b/lib/src/gpu/applygainmap_gl.cpp	2025-11-28 11:54:44.197113300 +0100
+@@ -411,7 +411,7 @@
+         (log2(display_boost) - log2(gainmap_metadata->hdr_capacity_min)) /
+         (log2(gainmap_metadata->hdr_capacity_max) - log2(gainmap_metadata->hdr_capacity_min));
+     // avoid extrapolating the gain map to fill the displayable range
+-    gainmap_weight = CLIP3(0.0f, gainmap_weight, 1.0f);
++    gainmap_weight = CLIP3(gainmap_weight, 0.0f, 1.0f);
+   } else {
+     gainmap_weight = 1.0f;
+   }
diff --git a/mingw-w64-libultrahdr/PKGBUILD b/mingw-w64-libultrahdr/PKGBUILD
index bd6ef668ea..ba40f3fb49 100644
--- a/mingw-w64-libultrahdr/PKGBUILD
+++ b/mingw-w64-libultrahdr/PKGBUILD
@@ -4,7 +4,7 @@ _realname=libultrahdr
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=1.4.0
-pkgrel=3
+pkgrel=4
 pkgdesc="Library for encoding and decoding ultrahdr images (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -22,11 +22,13 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
 source=("https://github.com/google/libultrahdr/archive/v${pkgver}/${_realname}-${pkgver}.tar.gz"
         "001-pkg-config.patch"
         "https://github.com/google/libultrahdr/commit/6db3a83ee2b1f79850f3f597172289808dc6a331.patch"
-        "https://github.com/google/libultrahdr/commit/5ed39d67cd31d254e84ebf76b03d4b7bcc12e2f7.patch")
+        "https://github.com/google/libultrahdr/commit/5ed39d67cd31d254e84ebf76b03d4b7bcc12e2f7.patch"
+        "002-fix-gl-clip.patch")
 sha512sums=('2282bed4ae353f3b43039ca69b699754f9ef7e1611f321bf27ad1e50e7894953b8e44f28cbe215c186b5b037682a6d5733c6e7c638444d29fdcb5a661294c075'
             'ccaa15bc71c0c4a88044bd35ab929b88763cf20838f6e3b0bf7b3623ea851649e97fb0dac633a1160af805d63634a1f98e4f5f19415a7647d589f23c63f08add'
             '124e7a24857148f08862a3b6b32af69618076bae485e053e1446fb8592b0b3e449b1a66dc1c758aacbc8a4a97dc2e813b607875199809b5b7127db2f869f8d83'
-            'bc63d46069a9de79ed2eb04f5a3a220dbff69e56ff2839ccaca401ced56ca3064325480db42069dad03f2ccaadcec4dc848baced9c3142f012b9fb2553682386')
+            'bc63d46069a9de79ed2eb04f5a3a220dbff69e56ff2839ccaca401ced56ca3064325480db42069dad03f2ccaadcec4dc848baced9c3142f012b9fb2553682386'
+            'cd9f9b9493d406483415aa80cab090aadfea775a5658c023f1c13ea83e7cb0a8fb386601d6b7ae561db7d615f74524d7fd30ae357dc4e123535f4a656e0cd049')
 
 prepare() {
   cd "${_realname}-${pkgver}"
@@ -39,6 +41,8 @@ prepare() {
 
   # https://github.com/google/libultrahdr/issues/372
   patch -Np1 -i "${srcdir}"/5ed39d67cd31d254e84ebf76b03d4b7bcc12e2f7.patch
+  # and GL code path equivalent: https://github.com/google/libultrahdr/issues/372#issuecomment-3585573123
+  patch -Np1 -i "${srcdir}"/002-fix-gl-clip.patch
 }
 
 build() {