From 20b44db2843e280474a45665f2584f9130eb686b Mon Sep 17 00:00:00 2001
From: Raimo Niskanen <raimo@erlang.org>
Date: Fri, 15 Apr 2016 10:40:00 +0200
Subject: Use .png pictures instead of .gif

---
 system/doc/design_principles/Makefile        |  17 ++++++++++++-----
 system/doc/design_principles/code_lock.gif   | Bin 35031 -> 0 bytes
 system/doc/design_principles/code_lock.png   | Bin 0 -> 58906 bytes
 system/doc/design_principles/code_lock_2.gif | Bin 29420 -> 0 bytes
 system/doc/design_principles/code_lock_2.png | Bin 0 -> 51848 bytes
 system/doc/design_principles/statem.xml      |   4 ++--
 6 files changed, 14 insertions(+), 7 deletions(-)
 delete mode 100644 system/doc/design_principles/code_lock.gif
 create mode 100644 system/doc/design_principles/code_lock.png
 delete mode 100644 system/doc/design_principles/code_lock_2.gif
 create mode 100644 system/doc/design_principles/code_lock_2.png

diff --git a/system/doc/design_principles/Makefile b/system/doc/design_principles/Makefile
index 2ccf477e83..937b3e28c8 100644
--- a/system/doc/design_principles/Makefile
+++ b/system/doc/design_principles/Makefile
@@ -48,8 +48,6 @@ BOOK_FILES = book.xml
 GIF_FILES = \
 	note.gif \
 	clientserver.gif \
-	code_lock.gif \
-	code_lock_2.gif \
 	dist1.gif \
 	dist2.gif \
 	dist3.gif \
@@ -60,6 +58,12 @@ GIF_FILES = \
 	sup5.gif \
 	sup6.gif
 
+PNG_FILES = \
+	code_lock.png \
+	code_lock_2.png
+
+IMAGE_FILES = $(GIF_FILES) $(PNG_FILES)
+
 XML_FILES = \
 	$(BOOK_FILES) $(XML_CHAPTER_FILES) \
 	$(XML_PART_FILES) 
@@ -87,13 +91,16 @@ _create_dirs := $(shell mkdir -p $(HTMLDIR))
 $(HTMLDIR)/%.gif: %.gif
 	$(INSTALL_DATA) $< $@
 
+$(HTMLDIR)/%.png: %.png
+	$(INSTALL_DATA) $< $@
+
 docs: html
 
 local_docs: PDFDIR=../../pdf
 
-html: $(HTML_UG_FILE) gifs
+html: $(HTML_UG_FILE) images
 
-gifs: $(GIF_FILES:%=$(HTMLDIR)/%)
+images: $(IMAGE_FILES:%=$(HTMLDIR)/%)
 
 debug opt: 
 
@@ -111,7 +118,7 @@ release_docs_spec: docs
 #	$(INSTALL_DIR) "$(RELEASE_PATH)/pdf"
 #	$(INSTALL_DATA) $(TOP_PDF_FILE) "$(RELEASE_PATH)/pdf"
 	$(INSTALL_DIR) $(RELSYSDIR)
-	$(INSTALL_DATA) $(GIF_FILES) $(HTMLDIR)/*.html \
+	$(INSTALL_DATA) $(IMAGE_FILES) $(HTMLDIR)/*.html \
 		$(RELSYSDIR)
 
 
diff --git a/system/doc/design_principles/code_lock.gif b/system/doc/design_principles/code_lock.gif
deleted file mode 100644
index adcfee7eff..0000000000
Binary files a/system/doc/design_principles/code_lock.gif and /dev/null differ
diff --git a/system/doc/design_principles/code_lock.png b/system/doc/design_principles/code_lock.png
new file mode 100644
index 0000000000..5e5744ecc2
Binary files /dev/null and b/system/doc/design_principles/code_lock.png differ
diff --git a/system/doc/design_principles/code_lock_2.gif b/system/doc/design_principles/code_lock_2.gif
deleted file mode 100644
index 150515c3b6..0000000000
Binary files a/system/doc/design_principles/code_lock_2.gif and /dev/null differ
diff --git a/system/doc/design_principles/code_lock_2.png b/system/doc/design_principles/code_lock_2.png
new file mode 100644
index 0000000000..138fbdef6c
Binary files /dev/null and b/system/doc/design_principles/code_lock_2.png differ
diff --git a/system/doc/design_principles/statem.xml b/system/doc/design_principles/statem.xml
index c10afe482d..65daeac782 100644
--- a/system/doc/design_principles/statem.xml
+++ b/system/doc/design_principles/statem.xml
@@ -136,7 +136,7 @@ handle_event(EventType, EventContent, State, Data) ->
       it is is wrong, we start all over,
       waiting for a new button sequence.
     </p>
-    <image file="code_lock.gif">
+    <image file="code_lock.png">
       <icaption>Code lock state diagram</icaption>
     </image>
     <p>
@@ -934,7 +934,7 @@ enter(Tag, State, Data) ->
       and some more utilizing the entry actions,
       which deserves a new state diagram:
     </p>
-    <image file="code_lock_2.gif">
+    <image file="code_lock_2.png">
       <icaption>Code lock state diagram revisited</icaption>
     </image>
     <p>
-- 
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