Research

tools/vram_analyze.py

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+from collections import deque
+IN_PATH = r"K:\ghidra\Crusader_Decomp\binary\Crusader - No Remorse Memdump Weapons.bin"
+W,H = 1024,512
+import os
+with open(IN_PATH,'rb') as f:
+    data = f.read()
+count = min(len(data)//2, W*H)
+# build mask of non-black pixels
+mask = bytearray(W*H)
+for i in range(count):
+    off = i*2
+    val = data[off] | (data[off+1]<<8)
+    b = (val & 0x1F) << 3
+    g = ((val >>5) & 0x1F) << 3
+    r = ((val >>10) & 0x1F) << 3
+    if r|g|b:
+        mask[i] = 1
+# flood-fill connected components (4-neigh)
+visited = bytearray(W*H)
+bbs = []
+for idx in range(W*H):
+    if mask[idx] and not visited[idx]:
+        q = deque([idx])
+        visited[idx]=1
+        xs = []
+        ys = []
+        while q:
+            v = q.popleft()
+            y = v // W
+            x = v % W
+            xs.append(x); ys.append(y)
+            # neighbors
+            for dx,dy in ((1,0),(-1,0),(0,1),(0,-1)):
+                nx = x+dx; ny = y+dy
+                if 0<=nx<W and 0<=ny<H:
+                    ni = ny*W+nx
+                    if mask[ni] and not visited[ni]:
+                        visited[ni]=1
+                        q.append(ni)
+        x0,x1 = min(xs), max(xs)
+        y0,y1 = min(ys), max(ys)
+        area = len(xs)
+        start_idx = y0*W + x0
+        end_idx = y1*W + x1
+        start_off = start_idx*2
+        end_off = (end_idx+1)*2 - 1
+        bbs.append((x0,y0,x1,y1,area,start_off,end_off))
+# sort by area descending
+bbs.sort(key=lambda x: -x[4])
+print('Found', len(bbs), 'components')
+for i,(x0,y0,x1,y1,area,so,eo) in enumerate(bbs[:20]):
+    print(f'[{i}] box=({x0},{y0})-({x1},{y1}) area={area} bytes=0x{so:06x}-0x{eo:06x}')
+# Save the top few as small BMP crops for inspection
+from PIL import Image
+img = Image.open(r"K:\ghidra\Crusader_Decomp\binary\vram_weapons.png")
+for i,(x0,y0,x1,y1,area,so,eo) in enumerate(bbs[:12]):
+    crop = img.crop((x0,y0,x1+1,y1+1))
+    out = r"K:\ghidra\Crusader_Decomp\binary\crop_%02d.png"%i
+    crop.save(out)
+    print('wrote', out)