From f435d0a1031f232b39306b534ee9bdafaea8c999 Mon Sep 17 00:00:00 2001
From: Evgeniy Khramtsov <ekhramtsov@process-one.net>
Date: Sun, 17 Sep 2017 17:34:31 +0300
Subject: [PATCH] Add GIF support

---
 rebar.config       |  2 +-
 src/mod_avatar.erl | 17 ++++++++++++++---
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/rebar.config b/rebar.config
index ab326390e..0e8213cae 100644
--- a/rebar.config
+++ b/rebar.config
@@ -44,7 +44,7 @@
                                            {tag, "1.0.2"}}}},
         {if_var_true, riak, {riakc, ".*", {git, "https://github.com/processone/riak-erlang-client.git",
                                            {tag, "2.5.3"}}}},
-	{if_var_true, graphics, {eimp, ".*", {git, "https://github.com/processone/eimp.git"}}},
+	{if_var_true, graphics, {eimp, ".*", {git, "https://github.com/processone/eimp.git", "dc5bfe0"}}},
 	%% Elixir support, needed to run tests
         {if_var_true, elixir, {elixir, ".*", {git, "https://github.com/elixir-lang/elixir",
                                               {tag, {if_version_above, "17", "v1.4.4", "v1.1.1"}}}}},
diff --git a/src/mod_avatar.erl b/src/mod_avatar.erl
index f7b520d2e..6576429f8 100644
--- a/src/mod_avatar.erl
+++ b/src/mod_avatar.erl
@@ -399,6 +399,7 @@ decode_mime_type(MimeType) ->
 	<<"image/jpeg">> -> jpeg;
 	<<"image/png">> -> png;
 	<<"image/webp">> -> webp;
+	<<"image/gif">> -> gif;
 	_ -> unknown
     end.
 
@@ -414,23 +415,33 @@ have_eimp() -> false.
 
 mod_opt_type({convert, png}) ->
     fun(jpeg) -> jpeg;
-       (webp) -> webp
+       (webp) -> webp;
+       (gif) -> gif
     end;
 mod_opt_type({convert, webp}) ->
     fun(jpeg) -> jpeg;
-       (png) -> png
+       (png) -> png;
+       (gif) -> gif
     end;
 mod_opt_type({convert, jpeg}) ->
     fun(png) -> png;
+       (webp) -> webp;
+       (gif) -> gif
+    end;
+mod_opt_type({convert, gif}) ->
+    fun(png) -> png;
+       (jpeg) -> jpeg;
        (webp) -> webp
     end;
 mod_opt_type({convert, default}) ->
     fun(png) -> png;
        (webp) -> webp;
-       (jpeg) -> jpeg
+       (jpeg) -> jpeg;
+       (gif) -> gif
     end;
 mod_opt_type(_) ->
     [{convert, default},
      {convert, webp},
      {convert, png},
+     {convert, gif},
      {convert, jpeg}].