From 42a56e78dda5561d301ec2e61a0bac17e7342525 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 9 Nov 2012 14:54:29 +0000
Subject: Several patches from Petteri Aimonen (mostly NxWidgets)

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5324 42af7a65-404d-4744-a932-0658087f49c3
---
 NxWidgets/tools/bitmap_converter.py | 148 ++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100755 NxWidgets/tools/bitmap_converter.py

(limited to 'NxWidgets/tools/bitmap_converter.py')

diff --git a/NxWidgets/tools/bitmap_converter.py b/NxWidgets/tools/bitmap_converter.py
new file mode 100755
index 000000000..2cb7e8869
--- /dev/null
+++ b/NxWidgets/tools/bitmap_converter.py
@@ -0,0 +1,148 @@
+#!/usr/bin/env python
+
+'''This script converts from any image type supported by
+Python imaging library to the RLE-encoded format used by
+NxWidgets.
+'''
+
+from PIL import Image
+
+def get_palette(img, maxcolors = 255):
+  '''Returns a list of colors. If there are too many colors in the image,
+  the least used are removed.
+  '''
+  img = img.convert("RGB")
+  colors = img.getcolors(65536)
+  colors.sort(key = lambda c: -c[0])
+  return [c[1] for c in colors[:maxcolors]]
+
+def write_palette(outfile, palette):
+  '''Write the palette (normal and hilight) to the output file.'''
+  
+  outfile.write('static const NXWidgets::nxwidget_pixel_t palette[BITMAP_PALETTESIZE] =\n');
+  outfile.write('{\n')
+  
+  for i in range(0, len(palette), 4):
+    outfile.write('  ');
+    for r, g, b in palette[i:i+4]:
+      outfile.write('MKRGB(%3d,%3d,%3d), ' % (r, g, b))
+    outfile.write('\n');
+  
+  outfile.write('};\n\n')
+  
+  outfile.write('static const NXWidgets::nxwidget_pixel_t hilight_palette[BITMAP_PALETTESIZE] =\n');
+  outfile.write('{\n')
+  
+  for i in range(0, len(palette), 4):
+    outfile.write('  ');
+    for r, g, b in palette[i:i+4]:
+      r = min(255, r + 50)
+      g = min(255, g + 50)
+      b = min(255, b + 50)
+      outfile.write('MKRGB(%3d,%3d,%3d), ' % (r, g, b))
+    outfile.write('\n');
+  
+  outfile.write('};\n\n')
+  
+
+def quantize(color, palette):
+  '''Return the color index to closest match in the palette.'''
+  try:
+    return palette.index(color)
+  except ValueError:
+    # No exact match, search for the closest
+    def distance(color2):
+      return sum([(a - b)**2 for a, b in zip(color, color2)])
+    
+    return palette.index(min(palette, key = distance));
+
+def encode_row(img, palette, y):
+  '''RLE-encode one row of image data.'''
+  entries = []
+  color = None
+  repeats = 0
+  
+  for x in range(0, img.size[0]):
+    c = quantize(img.getpixel((x, y)), palette)
+    if c == color:
+      repeats += 1
+    else:
+      if color is not None:
+        entries.append((repeats, color))
+      
+      repeats = 1
+      color = c
+
+  if color is not None:
+    entries.append((repeats, color))
+      
+  return entries
+
+def write_image(outfile, img, palette):
+  '''Write the image contents to the output file.'''
+
+  outfile.write('static const NXWidgets::SRlePaletteBitmapEntry bitmap[] =\n');
+  outfile.write('{\n');
+  
+  for y in range(0, img.size[1]):
+    entries = encode_row(img, palette, y)
+    row = ""
+    for r, c in entries:
+      if len(row) > 60:
+        outfile.write('  ' + row + '\n')
+        row = ""
+      
+      row += '{%3d, %3d}, ' % (r, c)
+    
+    row += ' ' * (73 - len(row))
+    outfile.write('  ' + row + '/* Row %d */\n' % y)
+  
+  outfile.write('};\n\n');
+
+def write_descriptor(outfile, name):
+  '''Write the public descriptor structure for the image.'''
+  
+  outfile.write('extern const struct NXWidgets::SRlePaletteBitmap g_%s =\n' % name)
+  outfile.write('{\n')
+  outfile.write('  CONFIG_NXWIDGETS_BPP,\n')
+  outfile.write('  CONFIG_NXWIDGETS_FMT,\n')
+  outfile.write('  BITMAP_PALETTESIZE,\n')
+  outfile.write('  BITMAP_WIDTH,\n')
+  outfile.write('  BITMAP_HEIGHT,\n')
+  outfile.write('  {palette, hilight_palette},\n')
+  outfile.write('  bitmap\n')
+  outfile.write('};\n')
+  
+if __name__ == '__main__':
+  import sys
+  import os.path
+  
+  if len(sys.argv) != 3:
+    print "Usage: bitmap_converter.py source.png output.cxx"
+    sys.exit(1)
+  
+  img = Image.open(sys.argv[1])
+  outfile = open(sys.argv[2], 'w')
+  palette = get_palette(img)
+  
+  outfile.write(
+'''
+/* Automatically NuttX bitmap file. */
+/* Generated from %(src)s by bitmap_converter.py. */
+
+#include <nxconfig.hxx>
+#include <crlepalettebitmap.hxx>
+
+#define BITMAP_WIDTH %(width)s
+#define BITMAP_HEIGHT %(height)s
+#define BITMAP_PALETTESIZE %(palettesize)s
+
+''' % {'src': sys.argv[1], 'width': img.size[0], 'height': img.size[1],
+       'palettesize': len(palette)}
+  )
+
+  name = os.path.splitext(os.path.basename(sys.argv[1]))[0]
+  
+  write_palette(outfile, palette)
+  write_image(outfile, img, palette)
+  write_descriptor(outfile, name)
-- 
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