more debugging fiddled messages being ignored

8 files changed, 186 insertions, 4 deletions

diff --git a/.gitignore b/.gitignore
index b5424e0..ef45c97 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,5 @@
 roms/
 copyright/
 
+# drawio
+.$*.bkp
diff --git a/assets/draw-area.svg b/assets/draw-area.svg
new file mode 100644
index 0000000..8839997
--- /dev/null
+++ b/assets/draw-area.svg
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="305px" height="160px" viewBox="-0.5 -0.5 305 160" style="background-color: rgb(255, 255, 255);"><defs/><rect fill="#ffffff" width="100%" height="100%" x="0" y="0"/><g><g data-cell-id="0"><g data-cell-id="1"><g data-cell-id="U3h8rfvwRMaaIss59gVv-44"><g><rect x="8" y="40" width="256" height="80" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/></g></g><g data-cell-id="U3h8rfvwRMaaIss59gVv-2"><g><rect x="8" y="40" width="24" height="80" fill="#000000" stroke="none" pointer-events="all"/></g></g><g data-cell-id="U3h8rfvwRMaaIss59gVv-3"><g><rect x="32" y="40" width="55" height="16" fill="#000000" stroke="none" pointer-events="all"/></g></g><g data-cell-id="U3h8rfvwRMaaIss59gVv-4"><g><rect x="260" y="40" width="4" height="80" fill="#000000" stroke="none" pointer-events="all"/></g></g><g data-cell-id="U3h8rfvwRMaaIss59gVv-8"><g><path d="M 32 56 L 87 56 L 87 40 L 260 40 L 260 120 L 32 120 Z" fill="none" stroke="none" pointer-events="all"/></g><g><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; 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\ No newline at end of file
diff --git a/docs/figs.drawio b/docs/figs.drawio
new file mode 100644
index 0000000..5bb64a2
--- /dev/null
+++ b/docs/figs.drawio
@@ -0,0 +1,159 @@
+<mxfile host="Electron" agent="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/24.7.5 Chrome/126.0.6478.183 Electron/31.3.0 Safari/537.36" version="24.7.5">
+  <diagram name="draw-area" id="ag9XaxWigHyrzHp_qmMW">
+    <mxGraphModel dx="1416" dy="1447" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
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+        </mxCell>
+        <object label="draw area" placeholders="1" id="U3h8rfvwRMaaIss59gVv-8">
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+          </mxCell>
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+            <mxPoint x="79" y="-20" as="sourcePoint" />
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diff --git a/docs/notes.md b/docs/notes.md
index acc9067..fc7c43c 100644
--- a/docs/notes.md
+++ b/docs/notes.md
@@ -142,8 +142,17 @@ source: <https://git.pipeframe.xyz/fork/melonDS>
     screen become visible again in the edit field. This includes the bottom row
     of pixels, as well as the two rows of pixels shown in the single line
     message picture.
-  - The **apparent** drawable area (including obstructed top-left corner) is
-    228x80 pixels.
+  - The drawable area (including obstructed top-left corner) is 228x80 pixels,
+    while the entire message is actually 256x80 pixels:
+
+    ![](../assets/draw-area.svg)
+
+    The above figure illustrates the area which is 'drawable' (i.e. the area in
+    which the pen tool works). Fiddled messages that go outside this area are
+    received normally, but masked slightly differently when re-sent (chunk left
+    of username label appears to be masked). The actual image data is
+    unmodified even after being forwarded by normal systems (non-fiddling
+    systems).
 
 Observed package counts (no resends) for messages of different sizes:
 |draw area|display height|packet#|
diff --git a/docs/time.txt b/docs/time.txt
index dac4bea..5c9ec3e 100644
--- a/docs/time.txt
+++ b/docs/time.txt
@@ -27,3 +27,4 @@
 2024-08-31 2h35m: packet decoder
 2024-09-01 1h50m: homebrew ds toolchain hello world
 2024-10-04 2h10m: reverse message serialization
+2024-10-05 1h50m: debugging fiddled messages being ignored
diff --git a/experiments/conv/makefile b/experiments/conv/makefile
index ae2f70d..2a513c0 100644
--- a/experiments/conv/makefile
+++ b/experiments/conv/makefile
@@ -1,5 +1,8 @@
 %.png: %.bin
-	./pc2png $<
+	venv/bin/python3 pc2png $<
+
+%.bin: %.png
+	venv/bin/python3 png2pc $<
 
 %.h: %.bin
 	./bin2h $< > $@
diff --git a/experiments/conv/png2pc b/experiments/conv/png2pc
index d1eaab8..21b3b29 100755
--- a/experiments/conv/png2pc
+++ b/experiments/conv/png2pc
@@ -1,7 +1,7 @@
 #!/bin/python3
 import itertools
 import io
-from PIL import Image
+from PIL import Image, ImageDraw
 
 from consts import *
 from shared import main
@@ -37,6 +37,11 @@ def png2pc(data):
 	img = img.convert('RGB')
 	img = img.quantize(palette=palette_img)
 
+	draw = ImageDraw.Draw(img)
+	draw.rectangle(((0, 0), (24, img.height)), fill=0)
+	draw.rectangle(((252, 0), (256, img.height)), fill=0)
+	draw.rectangle(((24, 0), (79, 16)), fill=0)
+
 	output = b""
 	for tile_idx in range(tile_count):
 		tile = (
diff --git a/melonDS b/melonDS
-Subproject e361a4510b59b1ab85e2eb98203743b2017246d
+Subproject 1609ecbe1e217c48189e377060b4068de90c594