From 9b1d264510eb2339cf727cbb74c7864c7c2c996b Mon Sep 17 00:00:00 2001
From: Zach van Rijn <me@zv.io>
Date: Wed, 6 Dec 2023 17:24:48 -0600
Subject: Adjust gradient colors. Clarify wallpaper generation.

---
 prepare | 56 +++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 45 insertions(+), 11 deletions(-)

diff --git a/prepare b/prepare
index 4cf6843..f6b29d0 100755
--- a/prepare
+++ b/prepare
@@ -114,6 +114,12 @@ EOF
 );
 
 
+##
+# Y-axis menu bar offset (maximum).
+#
+MENU=100;
+
+
 #---------------------------------------------------------------
 # internal: meta
 #---------------------------------------------------------------
@@ -249,7 +255,9 @@ size_only ()
 #---------------------------------------------------------------
 
 mkdir -p "${HERE}/${TEMP}";
-mkdir -p "${HERE}/${KEEP}";
+
+rm -fr "${HERE}"/${KEEP};
+mkdir "${HERE}/${KEEP}";
 
 ##
 # Fetch the specified brand asset bundle from distfiles.
@@ -275,6 +283,15 @@ mkdir -p "${HERE}/${KEEP}";
 # The default "core" or "slim" wallpaper is made on the fly and
 # not provided as a rasterized image from the start.
 #
+# Discrete conversion steps are used for clarity of intent, even
+# though the same effect can be achieved by combining steps.
+#
+# FIXME: the 'MENU' padding needs to be 100px after resizing; we
+# currently do it before resizing. So we have to do a "reverse"
+# calculation to determine what is the equivalent of 100px for
+# the shortest target size for each aspect ratio. 100px is also
+# just an estimate and is not based on actual facts.
+#
 
 ##
 # make_fake GRADIENT_FROM GRADIENT_TO XxY TEMPLATE OUTPUT [ARGS]
@@ -289,6 +306,8 @@ make_fake ()
     args="${@}";        # all remaining arguments
 
     printf "Generating %5s ('%s')...\n" "${size}" "${name}";
+
+    # generate gradient brackground of correct size
     gm convert \
         -define gradient:direction=NorthEast \
         -size ${size} \
@@ -296,26 +315,40 @@ make_fake ()
         "${name}" \
         ;
 
-    # FIXME: this is literal magic?
+    # polyguin scaled to 80% of Y-MENU, translated +MENU
+    gm convert \
+        -background none \
+        -resize ${size%x*}x$(((${size#*x}-${MENU})*80/100)) \
+        "${TEMP}"/polyguin.svg \
+        "${name}.tmp.png" \
+        ;
     gm composite \
         -compose atop \
         -gravity southwest \
-        -background none \
-        -resize ${size%x*}x$((${size#*x}*80/100)) \
-        "${TEMP}"/polyguin.svg \
-        -geometry +0+100 \
+        "${name}.tmp.png" \
+        -geometry +0+${MENU} \
         "${name}" \
         "${name}" \
         ;
+
+    # polylogo scaled to 10% of Y-MENU, translated +MENU
+    gm convert \
+        -background none \
+        -resize ${size%x*}x$(((${size#*x}-${MENU})*10/100)) \
+        "${TEMP}"/gen_polylogo_template_${temp}.png \
+        "${name}.tmp.png" \
+        ;
     gm composite \
         -compose atop \
         -gravity southeast \
-        -background none \
-        "${TEMP}"/gen_polylogo_template_${temp}.png \
-        -geometry +50+100 \
+        "${name}.tmp.png" \
+        -geometry +50+${MENU} \
         "${name}" \
         "${name}" \
         ;
+    rm "${name}.tmp.png";
+
+    # apply any custom transformations
     gm convert \
         ${args} \
         "${name}" \
@@ -336,7 +369,7 @@ printf "%s\n" "${MAKE}" | while read ratio scale _; do
     # background (monochrome)
     mkdir -p "${TEMP}"/generated/background;
     make_fake ${x}x${y} \
-        "#bbbbbb" "#eeeeee" \
+        "#777777" "#dddddd" \
         black_x200 \
         "${TEMP}"/generated/background/${x}x${y}.png \
         -colorspace Gray \
@@ -345,7 +378,7 @@ printf "%s\n" "${MAKE}" | while read ratio scale _; do
     # lockscreen (full color)
     mkdir -p "${TEMP}"/generated/lockscreen;
     make_fake ${x}x${y} \
-        "#151515" "#303030" \
+        "#111111" "#444444" \
         white_x200 \
         "${TEMP}"/generated/lockscreen/${x}x${y}.png \
         ;
@@ -498,6 +531,7 @@ EOF
 # output: create tarball
 #---------------------------------------------------------------
 
+rm -fr adelie-wallpapers-${VTAG};
 mkdir -p adelie-wallpapers-${VTAG}/usr/share;
 
 # wallpapers
-- 
cgit v1.2.3-70-g09d2