doc: update Graphviz images to have a transparent background

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15616)

6 files changed, 11 insertions, 0 deletions

diff --git a/doc/life-cycles/cipher.dot b/doc/life-cycles/cipher.dot
index 6f1acb4026..8736ce7026 100644
--- a/doc/life-cycles/cipher.dot
+++ b/doc/life-cycles/cipher.dot
@@ -1,4 +1,6 @@
 digraph cipher {
+    bgcolor="transparent";
+
     begin [label=start, color="#deeaee", style="filled"];
     newed [fontcolor="#c94c4c", style="solid"];
 
diff --git a/doc/life-cycles/digest.dot b/doc/life-cycles/digest.dot
index 989342fd10..4ad7f79e45 100644
--- a/doc/life-cycles/digest.dot
+++ b/doc/life-cycles/digest.dot
@@ -1,4 +1,6 @@
 digraph digest {
+    bgcolor="transparent";
+
     begin [label=start, color="#deeaee", style="filled"];
     newed [label=newed, fontcolor="#c94c4c", style="solid"];
     initialised [label=initialised, fontcolor="#c94c4c"];
diff --git a/doc/life-cycles/kdf.dot b/doc/life-cycles/kdf.dot
index 4729dcdeba..b0e925685d 100644
--- a/doc/life-cycles/kdf.dot
+++ b/doc/life-cycles/kdf.dot
@@ -1,4 +1,6 @@
 strict digraph kdf {
+    bgcolor="transparent";
+
     begin [label=start, color="#deeaee", style="filled"];
     newed [label="newed", fontcolor="#c94c4c", style="solid"];
     deriving [label="deriving", fontcolor="#c94c4c"];
diff --git a/doc/life-cycles/mac.dot b/doc/life-cycles/mac.dot
index 799d90e7d3..c841c5f218 100644
--- a/doc/life-cycles/mac.dot
+++ b/doc/life-cycles/mac.dot
@@ -1,4 +1,6 @@
 digraph mac {
+    bgcolor="transparent";
+
     begin [label=start, color="#deeaee", style="filled"];
     newed [fontcolor="#c94c4c", style="solid"];
     initialised [fontcolor="#c94c4c"];
diff --git a/doc/life-cycles/pkey.dot b/doc/life-cycles/pkey.dot
index 1662c4ef3d..58b3a0c5bb 100644
--- a/doc/life-cycles/pkey.dot
+++ b/doc/life-cycles/pkey.dot
@@ -1,4 +1,5 @@
 strict digraph pkey {
+    bgcolor="transparent";
     layout=circo
 
     begin [label=start, color="#deeaee", style="filled"];
diff --git a/doc/life-cycles/rand.dot b/doc/life-cycles/rand.dot
index 5aa225f314..df740b7a9b 100644
--- a/doc/life-cycles/rand.dot
+++ b/doc/life-cycles/rand.dot
@@ -1,4 +1,6 @@
 strict digraph rand {
+    bgcolor="transparent";
+
     begin [label=start, color="#deeaee", style="filled"];
     newed [fontcolor="#c94c4c", style="solid"];
     instantiated [fontcolor="#c94c4c"];