build: refactor build_vendorheader

.gitignore

@@ -1,3 +1,4 @@
 _attic/
 vendor/src/
 emu.config
+__pycache__

Makefile.firmware

@@ -400,6 +400,9 @@ QSTR_GEN_EXTRA_CFLAGS += -DNO_QSTR -DN_X64 -DN_X86 -DN_THUMB -DN_ARM -DN_XTENSA
 
 all: $(BUILD)/$(TARGET).bin
 
+$(SRCDIR_FW)/firmware/vendorheader.bin: assets/satoshilabs.png
+	./tools/build_vendorheader '0000000000000000000000000000000000000000000000000000000000000000,0000000000000000000000000000000000000000000000000000000000000000,0000000000000000000000000000000000000000000000000000000000000000' 2 1.1 SatoshiLabs assets/satoshilabs.png micropython/firmware/vendorheader.bin
+
 $(BUILD_FW)/firmware/vendorheader.o: $(SRCDIR_FW)/firmware/vendorheader.bin
 	$(Q)$(OBJCOPY) -I binary -O elf32-littlearm -B arm \
 	  --rename-section .data=.vendorheader,alloc,load,readonly,contents \

micropython/firmware/.gitignore

@@ -1 +1,2 @@
 build/
+vendorheader.bin

tools/build_vendorheader

@@ -1,71 +1,15 @@
 #!/usr/bin/env python3
-from PIL import Image
 import sys
-import re
 import struct
-import zlib
+import re
 import binascii
+import os
+import imp
 
-def process_rgb(w, h, pix):
-    data = bytes()
-    for j in range(h):
-        for i in range(w):
-            r, g, b = pix[i, j]
-            c = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3)
-            data += struct.pack('>H', c)
-    return data
-
-
-def process_grayscale(w, h, pix):
-    data = bytes()
-    for j in range(h):
-        for i in range(w // 2):
-            l1, l2 = pix[i * 2, j], pix[i * 2 + 1, j]
-            c = (l1 & 0xF0) | (l2 >> 4)
-            data += struct.pack('>B', c)
-    return data
-
-
-def process_image(ifn):
-    im = Image.open(ifn)
-    w, h = im.size
-    print('Opened %s ... %d x %d @ %s' % (ifn, w, h, im.mode))
-
-    if im.mode == 'RGB':
-        print('Detected RGB mode')
-    elif im.mode == 'L':
-        if w % 2 > 0:
-            print('PNG file must have width divisible by 2')
-            return 3
-        print('Detected GRAYSCALE mode')
-    else:
-        print('Unknown mode:', im.mode)
-        return 4
-
-    pix = im.load()
-
-    if im.mode == 'RGB':
-        ofn = '%s.toif' % ifn[:-4]
-        pixeldata = process_rgb(w, h, pix)
-    else:
-        ofn = '%s.toig' % ifn[:-4]
-        pixeldata = process_grayscale(w, h, pix)
-    z = zlib.compressobj(level=9, wbits=10)
-    zdata = z.compress(pixeldata) + z.flush()
-    zdata = zdata[2:-4] # strip header and checksum
-
-    toif = b''
-    if im.mode == 'RGB':
-        toif += b'TOIf'
-    else:
-        toif += b'TOIg'
-    toif += struct.pack('<HH', w, h)
-    toif += struct.pack('<I', len(zdata))
-    toif += zdata
-    return toif
+png2toi = imp.load_source('png2toi', os.path.dirname(__file__) + '/png2toi')
 
 # encode vendor name, add length byte and padding to multiple of 4
-def vendorencode(vname):
+def encodevendor(vname):
     vbin = vname.encode('utf-8')
     vbin = struct.pack('<B',len(vbin)) + vbin
     vbin += b'\0' * (-len(vbin) & 3)
@@ -81,10 +25,9 @@ def main():
         print('Usage build_vendorheader key1hex,... m version vendorname vendorimage.png vendorimage.bin')
         return 1
 
-    keys = list(map(encodekey, sys.argv[1].split(',')))
+    keys = [encodekey(x) for x in sys.argv[1].split(',')]
     m = int(sys.argv[2])
-    (major,minor) = map(lambda x: int(x),
-                        re.search('^(\d+)\.(\d+)$', sys.argv[3]).groups())
+    (vmajor, vminor) = [int(x) for x in sys.argv[3].split('.')]
     vname = sys.argv[4]
     ifn = sys.argv[5]
     ofn = sys.argv[6]
@@ -92,11 +35,11 @@ def main():
         print('Must provide PNG file')
         return 2
 
-    timeout = 0
-    vheader = b'TRZV' + struct.pack('<IIBBBB', 0, timeout, major, minor, m, len(keys))
+    expiry = 0
+    vheader = b'TRZV' + struct.pack('<IIBBBB', 0, expiry, vmajor, vminor, m, len(keys))
     for k in keys:
         vheader += k
-    vheader += vendorencode(vname) + process_image(ifn)
+    vheader += encodevendor(vname) + png2toi.process_image(ifn)
     padding = 65 + (-len(vheader) - 65) & 511
     vheader += b'\0' * padding
 

tools/png2toi

@@ -25,7 +25,7 @@ def process_grayscale(w, h, pix):
     return data
 
 
-def process_image(ifn):
+def process_image(ifn, savefiles=False):
     im = Image.open(ifn)
     w, h = im.size
     print('Opened %s ... %d x %d @ %s' % (ifn, w, h, im.mode))
@@ -53,28 +53,34 @@ def process_image(ifn):
     zdata = z.compress(pixeldata) + z.flush()
     zdata = zdata[2:-4] # strip header and checksum
 
-    with open(ofn, 'wb') as f:
-        if im.mode == 'RGB':
-            f.write(b'TOIf')
-        else:
-            f.write(b'TOIg')
-        f.write(struct.pack('<HH', w, h))
-        f.write(struct.pack('<I', len(zdata)))
-        f.write(zdata)
-        print('Written %s ... %d bytes' % (ofn, 4 + 4 + len(zdata)))
-    with open(ofn + '.h', 'wt') as f:
-        f.write('static const uint8_t toi_%s[] = {\n' % ifn[:-4])
-        if im.mode == 'RGB':
-            f.write("    'T', 'O', 'I', 'f',\n")
-        else:
-            f.write("    'T', 'O', 'I', 'g',\n")
-        f.write('    (uint16_t)%d, (uint16_t)%d,\n' % (w, h))
-        f.write('    (uint32_t)%d,\n' % len(zdata))
-        f.write('   ')
-        for b in zdata:
-            f.write(' 0x%02x,' % b)
-        f.write('\n};\n')
-        print('Written %s ...' % (ofn + '.h'))
+    data = b''
+    if im.mode == 'RGB':
+        data += b'TOIf'
+    else:
+        data += b'TOIg'
+    data += struct.pack('<HH', w, h)
+    data += struct.pack('<I', len(zdata))
+    data += zdata
+
+    if savefiles:
+        with open(ofn, 'wb') as f:
+            f.write(data)
+            print('Written %s ... %d bytes' % (ofn, len(data)))
+        with open(ofn + '.h', 'wt') as f:
+            f.write('static const uint8_t toi_%s[] = {\n' % ifn[:-4])
+            if im.mode == 'RGB':
+                f.write("    'T', 'O', 'I', 'f',\n")
+            else:
+                f.write("    'T', 'O', 'I', 'g',\n")
+                f.write('    (uint16_t)%d, (uint16_t)%d,\n' % (w, h))
+                f.write('    (uint32_t)%d,\n' % len(zdata))
+                f.write('   ')
+            for b in zdata:
+                f.write(' 0x%02x,' % b)
+            f.write('\n};\n')
+            print('Written %s ... done' % (ofn + '.h'))
+
+    return data
 
 
 def main():
@@ -87,7 +93,7 @@ def main():
         print('Must provide PNG file')
         return 2
 
-    process_image(ifn)
+    process_image(ifn, savefiles=True)
 
 
 main()