Research

tools/vram_to_bmp.py

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+import struct, os
+IN_PATH = r"K:\ghidra\Crusader_Decomp\binary\Crusader - No Remorse Memdump Weapons.bin"
+OUT_PATH = r"K:\ghidra\Crusader_Decomp\binary\vram_weapons.bmp"
+W, H = 1024, 512
+with open(IN_PATH, 'rb') as f:
+    data = f.read()
+exp = W * H * 2
+if len(data) < exp:
+    print(f"Warning: expected {exp} bytes, got {len(data)} bytes")
+# read pixels (little-endian 16bpp)
+count = min(len(data) // 2, W * H)
+pixels = [None] * (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
+    pixels[i] = (r, g, b)
+# fill remaining if any
+for i in range(count, W*H):
+    pixels[i] = (0,0,0)
+# BMP row padding
+row_bytes_unpadded = 3 * W
+row_size = (row_bytes_unpadded + 3) // 4 * 4
+pixel_data = bytearray()
+for y in range(H-1, -1, -1):
+    row_start = y * W
+    for x in range(W):
+        r,g,b = pixels[row_start + x]
+        pixel_data.extend(bytes((b, g, r)))
+    pad = row_size - row_bytes_unpadded
+    if pad:
+        pixel_data.extend(b"\x00" * pad)
+# headers
+bfType = b'BM'
+bfSize = 14 + 40 + len(pixel_data)
+bfReserved1 = 0
+bfReserved2 = 0
+bfOffBits = 14 + 40
+bmp = bytearray()
+bmp.extend(bfType)
+bmp.extend(struct.pack('<IHHI', bfSize, bfReserved1, bfReserved2, bfOffBits))
+# DIB header (BITMAPINFOHEADER)
+biSize = 40
+biWidth = W
+biHeight = H
+biPlanes = 1
+biBitCount = 24
+biCompression = 0
+biSizeImage = len(pixel_data)
+biXPelsPerMeter = 2835
+biYPelsPerMeter = 2835
+biClrUsed = 0
+biClrImportant = 0
+bmp.extend(struct.pack('<IIIHHIIIIII', biSize, biWidth, biHeight, biPlanes, biBitCount, biCompression, biSizeImage, biXPelsPerMeter, biYPelsPerMeter, biClrUsed, biClrImportant))
+bmp.extend(pixel_data)
+with open(OUT_PATH, 'wb') as f:
+    f.write(bmp)
+print('Wrote', OUT_PATH, 'bytes=', len(bmp))