Initial commit

README.md

@@ -1,3 +1,18 @@
 # svg2GR
 
-Converts .svg files generated by Aseprite to TempleOS GR format, preserving palette and transparency
+Converts .svg files generated by Aseprite to TempleOS GR format, preserving palette and transparency
+
+# Notes
+
+Tested w/ Aseprite v1.2.33-x64
+
+# Usage
+
+- Create new indexed-color, transparent background image in Aseprite; use provided `GR.ase` palette file.
+
+- Draw something
+
+- Save file as .svg
+
+- `svg2GR filename.svg` will generate `filename.GR`
+

svg2GR

@@ -0,0 +1,55 @@
+#!/usr/bin/python3
+import os
+import struct
+import sys
+
+color_lookup = { "#000000": 0, "#0000AA": 1, "#00AA00": 2, "#00AAAA": 3, "#AA0000": 4, "#AA00AA": 5, "#AA5500": 6, "#AAAAAA": 7, "#555555": 8, "#5555FF": 9, "#55FF55": 10, "#55FFFF": 11, "#FF5555": 12, "#FF55FF": 13, "#FFFF55": 14, "#FFFFFF": 15 }
+
+def get_attr(src, substr):
+    return src[src.find(substr) + len(substr) + 2:src.find('"', src.find(substr) + len(substr) + 2)]
+
+def main():
+    if len(sys.argv) < 2:
+        print("svg2GR - Converts .svg files generated by Aseprite to TempleOS GR format,")
+        print("         preserving palette and transparency.")
+        print("Usage:   svg2GR [svg file]")
+        return 1
+
+    svg_file = sys.argv[1]
+    if not os.path.exists(svg_file):
+        print("Error: file not found - " + svg_file)
+        return 1
+
+    svg_rows = open(svg_file, "r").readlines()
+
+    width = int(get_attr(svg_rows[1], "width"))
+    height = int(get_attr(svg_rows[1], "height"))
+    width_internal = (width + 7) & (-8);
+
+    x = 0
+    y = 0
+    color = 0
+    buffer = bytearray([255]) * (height * width_internal) 
+
+    i = 2
+    while i < len(svg_rows) - 1:
+        x = int(get_attr(svg_rows[i], "x"))
+        y = int(get_attr(svg_rows[i], "y"))
+        if "opacity" in svg_rows[i]:
+            color = 255
+        else:
+            color = color_lookup[get_attr(svg_rows[i], "fill")]
+        buffer[(y * width_internal) + x] = color
+        i += 1
+
+    f = open(svg_file.replace(".svg",".GR"), "wb")
+    f.write(struct.pack('Qiiiiii', 0, 0, 0, width, width_internal, height, 0))
+    f.write(buffer)
+    f.close()
+
+    return 0
+
+main()
+
+
+