insert imgconvert.py

Signed-off-by: Peter Siegmund <peter@rdkr.com>

ePaper/Makefile

@@ -0,0 +1,2 @@
+convert:
+	python imgconvert.py -i ./data/staticmap.png -o src/staticmap.h -n staticmap

ePaper/imgconvert.py

@@ -0,0 +1,49 @@
+#!python3
+
+from PIL import Image, ImageOps
+from argparse import ArgumentParser
+import sys
+import math
+
+SCREEN_WIDTH = 1200
+SCREEN_HEIGHT = 825
+
+if SCREEN_WIDTH % 2:
+    print("image width must be even!", file=sys.stderr)
+    sys.exit(1)
+
+parser = ArgumentParser()
+parser.add_argument('-i', action="store", dest="inputfile")
+parser.add_argument('-n', action="store", dest="name")
+parser.add_argument('-o', action="store", dest="outputfile")
+
+args = parser.parse_args()
+
+im = Image.open(args.inputfile)
+# convert to grayscale
+im = im.convert(mode='L')
+im.thumbnail((SCREEN_WIDTH, SCREEN_HEIGHT), Image.LANCZOS)
+
+# Write out the output file.
+with open(args.outputfile, 'w') as f:
+    f.write("const uint32_t {}_width = {};\n".format(args.name, im.size[0]))
+    f.write("const uint32_t {}_height = {};\n".format(args.name, im.size[1]))
+    f.write(
+        "const uint8_t {}_data[({}*{})/2] = {{\n".format(args.name, math.ceil(im.size[0] / 2) * 2, im.size[1])
+    )
+    for y in range(0, im.size[1]):
+        byte = 0
+        done = True
+        for x in range(0, im.size[0]):
+            l = im.getpixel((x, y))
+            if x % 2 == 0:
+                byte = l >> 4
+                done = False;
+            else:
+                byte |= l & 0xF0
+                f.write("0x{:02X}, ".format(byte))
+                done = True
+        if not done:
+            f.write("0x{:02X}, ".format(byte))
+        f.write("\n\t");
+    f.write("};\n")

ePaper/src/main.cpp

@@ -34,7 +34,7 @@ void setup()
   memset(framebuffer, 0xFF, EPD_WIDTH * EPD_HEIGHT / 2);
 
   Rect_t area = {
-      .x = 0,
+      .x = EPD_WIDTH - staticmap_width,
       .y = 0,
       .width = staticmap_width,
       .height = staticmap_height};