Fix coverage utility script

1 files changed, 102 insertions, 0 deletions

diff --git a/utils/disasm_coverage.py b/utils/disasm_coverage.py
new file mode 100644
index 0000000..6a68730
--- /dev/null
+++ b/utils/disasm_coverage.py
@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from __future__ import division
+
+import os
+import sys
+import argparse
+import png
+from mapreader import MapReader
+from colorsys import hls_to_rgb
+
+if __name__ == '__main__':
+    # argument parser
+    ap = argparse.ArgumentParser()
+    ap.add_argument('-r', dest='romname')
+    ap.add_argument('-o', dest='filename', default='coverage.png')
+    ap.add_argument('-m', dest='mapfile', required=True)
+    ap.add_argument('-b', dest='num_banks', required=True, type=lambda x: int(x, 0))
+    args = ap.parse_args()
+    
+    bank_mask = 0x3FFF
+    bank_size = 0x4000 # bytes
+    width = 256 # pixels per row
+    bpp = 8 # bytes per pixel
+    
+    romname = args.romname
+    rom_size = args.num_banks * bank_size # bytes
+    height = (args.num_banks * bank_size + (width * bpp - 1)) // (width * bpp) # pixels
+    rows_per_bank = bank_size // (width * bpp)
+    
+    r = MapReader()
+    try:
+        with open(args.mapfile, 'r') as f:
+            l = f.readlines()
+    except UnicodeDecodeError:
+        # Python 3 seems to choke on the file's encoding, but the `encoding` keyword only works on Py3
+        with open(args.mapfile, 'r', encoding= 'utf-8') as f:
+            l = f.readlines()
+    r.read_map_data(l)
+    
+    default_bank_data = {'sections': [], 'used': 0, 'slack': bank_size}
+    filler = [0x00, 0xFF]
+    
+    if (romname is not None):
+        with open(romname, 'rb') as f:
+            for rb in range(0, args.num_banks):
+                bank_data = r.bank_data['ROM0 bank' if rb == 0 else 'ROMX bank']
+                data = bank_data.get(rb, default_bank_data)
+                bank = f.read(bank_size)
+                if (bank[bank_size - 1] in filler):
+                    fill = bank[bank_size - 1]
+                    for i in reversed(range(-1, bank_size - 1)):
+                        if (i < 0 or bank[i] != fill):
+                            break
+                    # i is now pointing to first different byte
+                    beg = i + 1     + (0 if rb == 0 else bank_size)
+                    end = bank_size + (0 if rb == 0 else bank_size)
+                    data['sections'].append({'beg': beg, 'end': end, 'name': 'Section_Trailing_Fill', 'symbols': []})
+    
+    hit_data = [[0] * width for _ in range(height)]
+    for bank in range(args.num_banks):
+        bank_data = r.bank_data['ROM0 bank' if bank == 0 else 'ROMX bank']
+        data = bank_data.get(bank, default_bank_data)
+        for s in data['sections']:
+            beg = (s['beg'] & bank_mask) + bank * bank_size
+            end = ((s['end'] -1) & bank_mask) + bank * bank_size # end is exclusive
+            # skip zero-sized entries
+            if (s['beg'] == s['end']):
+                continue
+            y_beg = beg // (width * bpp)
+            x_beg = (beg % (width * bpp)) // bpp
+            y_end = end // (width * bpp)
+            x_end = (end % (width * bpp)) // bpp
+            #print('beg {0} end {1}: {2}/{3} -- {4}/{5}'.format(beg, end, y_beg, x_beg, y_end, x_end))
+            # special case y_beg/x_beg and y_end/x_end
+            if (y_beg == y_end and x_beg == x_end):
+                hit_data[y_beg][x_beg] += end - beg + 1
+            else:
+                hit_data[y_beg][x_beg] += bpp - ((beg % (width * bpp)) - x_beg * bpp)
+                hit_data[y_end][x_end] += ((end % (width * bpp)) - x_end * bpp + 1)
+            # regular case
+            for y in range(y_beg, y_end + 1):
+                x_line_beg = 0         if y_beg != y else x_beg + 1
+                x_line_end = width - 1 if y_end != y else x_end - 1
+                for x in range(x_line_beg, x_line_end + 1):
+                    hit_data[y][x] += bpp
+    
+    png_data = []
+    for i, row in enumerate(hit_data):
+        bank = i // rows_per_bank
+        hue = 0 if bank % 2 else 120
+        row_png_data = ()
+        for col in row:
+            hls = (hue/360.0, 1.0 - (col/bpp * (100 - 15))/100.0, 1.0)
+            rgb = tuple(255 * x for x in hls_to_rgb(*hls))
+            row_png_data += rgb
+        png_data.append(row_png_data)
+    
+    with open(args.filename, 'wb') as f:
+        w = png.Writer(width, height)
+        w.write(f, png_data)