From 9d0448eb50f428179ae51b12f6af96f7652efa36 Mon Sep 17 00:00:00 2001
From: Petr Hodina <phodina@protonmail.com>
Date: Sat, 15 Oct 2022 08:42:17 +0200
Subject: [PATCH v3 2/7] gnu: alacritty: Patch to run on OpenGL 3.1 on aarch64
 target.

* gnu/packages/terminals.scm (alacritty)[source]: Apply patch on aarch64
target.
* gnu/packages/patches/alacritty-use-OpenGL-3.1-with-extensions-instead-of-OpenGL-3.3.patch:
New file
* gnu/local.mk: Add patch.

diff --git a/gnu/local.mk b/gnu/local.mk
index 78bdc113ac..15c62d5c7f 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -865,6 +865,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/akonadi-paths.patch		\
   %D%/packages/patches/akonadi-not-relocatable.patch		\
   %D%/packages/patches/akonadi-timestamps.patch		\
+  %D%/packages/patches/alacritty-use-OpenGL-3.1-with-extensions-instead-of-OpenGL-3.3.patch \
   %D%/packages/patches/allegro-mesa-18.2.5-and-later.patch	\
   %D%/packages/patches/anki-mpv-args.patch			\
   %D%/packages/patches/antiword-CVE-2014-8123.patch			\
diff --git a/gnu/packages/patches/alacritty-use-OpenGL-3.1-with-extensions-instead-of-OpenGL-3.3.patch b/gnu/packages/patches/alacritty-use-OpenGL-3.1-with-extensions-instead-of-OpenGL-3.3.patch
new file mode 100644
index 0000000000..92d72a83e7
--- /dev/null
+++ b/gnu/packages/patches/alacritty-use-OpenGL-3.1-with-extensions-instead-of-OpenGL-3.3.patch
@@ -0,0 +1,86 @@
+From cc6f303100075e286d09ca77d31749f7adcdffc6 Mon Sep 17 00:00:00 2001
+From: Autumn <autumnontape@tutanota.com>
+Date: Wed, 14 Jul 2021 04:37:03 -0700
+Subject: [PATCH] use OpenGL 3.1 with extensions instead of OpenGL 3.3
+
+---
+ alacritty/build.rs            | 2 +-
+ alacritty/res/rect.f.glsl     | 2 +-
+ alacritty/res/rect.v.glsl     | 3 ++-
+ alacritty/res/text.f.glsl     | 3 ++-
+ alacritty/res/text.v.glsl     | 3 ++-
+ alacritty/src/renderer/mod.rs | 2 +-
+ 6 files changed, 9 insertions(+), 6 deletions(-)
+
+diff --git a/alacritty/build.rs b/alacritty/build.rs
+index 48841ca..28c20e2 100644
+--- a/alacritty/build.rs
++++ b/alacritty/build.rs
+@@ -11,7 +11,7 @@ fn main() {
+     let dest = env::var("OUT_DIR").unwrap();
+     let mut file = File::create(&Path::new(&dest).join("gl_bindings.rs")).unwrap();
+ 
+-    Registry::new(Api::Gl, (3, 3), Profile::Core, Fallbacks::All, ["GL_ARB_blend_func_extended"])
++    Registry::new(Api::Gl, (3, 1), Profile::Core, Fallbacks::All, ["GL_ARB_blend_func_extended", "GL_ARB_instanced_arrays", "GL_ARB_explicit_attrib_location"])
+         .write_bindings(GlobalGenerator, &mut file)
+         .unwrap();
+ 
+diff --git a/alacritty/res/rect.f.glsl b/alacritty/res/rect.f.glsl
+index 945eaf2..9f84237 100644
+--- a/alacritty/res/rect.f.glsl
++++ b/alacritty/res/rect.f.glsl
+@@ -1,4 +1,4 @@
+-#version 330 core
++#version 140
+ 
+ flat in vec4 color;
+ 
+diff --git a/alacritty/res/rect.v.glsl b/alacritty/res/rect.v.glsl
+index bf9a97d..258bb36 100644
+--- a/alacritty/res/rect.v.glsl
++++ b/alacritty/res/rect.v.glsl
+@@ -1,4 +1,5 @@
+-#version 330 core
++#version 140
++#extension GL_ARB_explicit_attrib_location : require
+ layout (location = 0) in vec2 aPos;
+ layout (location = 1) in vec4 aColor;
+ 
+diff --git a/alacritty/res/text.f.glsl b/alacritty/res/text.f.glsl
+index d5e2688..d4d559c 100644
+--- a/alacritty/res/text.f.glsl
++++ b/alacritty/res/text.f.glsl
+@@ -1,4 +1,5 @@
+-#version 330 core
++#version 140
++#extension GL_ARB_explicit_attrib_location : require
+ in vec2 TexCoords;
+ flat in vec4 fg;
+ flat in vec4 bg;
+diff --git a/alacritty/res/text.v.glsl b/alacritty/res/text.v.glsl
+index 31e6f93..09c477a 100644
+--- a/alacritty/res/text.v.glsl
++++ b/alacritty/res/text.v.glsl
+@@ -1,4 +1,5 @@
+-#version 330 core
++#version 140
++#extension GL_ARB_explicit_attrib_location : require
+ // Cell properties.
+ layout(location = 0) in vec2 gridCoords;
+ 
+diff --git a/alacritty/src/renderer/mod.rs b/alacritty/src/renderer/mod.rs
+index bac8225..3e170be 100644
+--- a/alacritty/src/renderer/mod.rs
++++ b/alacritty/src/renderer/mod.rs
+@@ -600,7 +600,7 @@ impl QuadRenderer {
+                         size as *const _,
+                     );
+                     gl::EnableVertexAttribArray(index);
+-                    gl::VertexAttribDivisor(index, 1);
++                    gl::VertexAttribDivisorARB(index, 1);
+ 
+                     #[allow(unused_assignments)]
+                     {
+-- 
+2.32.0
+
diff --git a/gnu/packages/terminals.scm b/gnu/packages/terminals.scm
index 1084cd2d7d..ce096b1bc2 100644
--- a/gnu/packages/terminals.scm
+++ b/gnu/packages/terminals.scm
@@ -1341,6 +1341,14 @@ (define-public alacritty
              (url "https://github.com/jwilm/alacritty")
              (commit (string-append "v" version))))
        (file-name (git-file-name name version))
+       ;; This patch enables to run Alacritty on aarch64 targets such as
+       ;; PineBook Pro which run Panfrost driver and support OpenGL 3.1
+       (patches
+         `,(if (string-prefix? "arch64" (or (%current-system)
+                                  (%current-target-system)))
+         (search-patches
+          "alacritty-use-OpenGL-3.1-with-extensions-instead-of-OpenGL-3.3.patch")
+          '()))
        (sha256
         (base32 "068y0b1a0m33r7a3j2xf6k602sc8062gm4d5568ynfx6w5n481lj"))))
     (build-system cargo-build-system)
-- 
2.37.2