def from_stream(cls, stream, offset_gfx, offset_collision, palette):
stream.seek(offset_gfx)
tile_count = stream.read_uint() / 4
stream.seek(offset_gfx)
tile_offsets = []
for _ in range(0, tile_count):
offset = offset_gfx + stream.read_uint()
tile_offsets.append(offset)
# Read tile graphics.
tiles = []
for offset in tile_offsets:
stream.seek(offset)
bitplane = Bitplane.from_stream(stream, BitplaneType.PLANAR, 32, 32, 4)
surface = bitplane.create_surface(None, palette, 0, 0, MaskMode.NONE)
tile = Tile()
tile.surface = surface
tiles.append(tile)
# Read collision data.
stream.seek(offset_collision)
for tile in tiles:
tile.collision = [0] * 16
for index in range(0, 16):
tile.collision[index] = stream.read_ubyte()
tile.render_collision()
return cls(tiles)
def load_graphics(self, json_filename, directory):
with open(json_filename, 'r') as fp:
data = json.load(fp)
# Read palettes.
palettes = {}
for filename, file_data in data.items():
filename = os.path.join(directory, filename)
stream = StreamRead.from_file(filename, Endianness.BIG)
for pal_name, pal_data in file_data['palettes'].items():
stream.seek(pal_data['offset'])
palettes[pal_name] = Palette.from_stream(stream, pal_data['length'], 4)
# Read and generate graphics.
for filename, file_data in data.items():
filename = os.path.join(directory, filename)
stream = StreamRead.from_file(filename, Endianness.BIG)
for gfx in file_data['graphics']:
width = gfx['width']
height = gfx['height']
planes = gfx['planes']
count = gfx['count']
palette = palettes[gfx['palette']]
# Determine the bitplane mode to use.
if gfx['mode'] == 'amiga_sprite':
mode = BitplaneType.AMIGA_SPRITE
elif gfx['mode'] == 'chunky':
mode = BitplaneType.CHUNKY
elif gfx['mode'] == 'planar':
mode = BitplaneType.PLANAR
else:
raise Exception('Unknown bitplane mode "{}".'.format(gfx['mode']))
# Read all bitplanes in order.
surfaces = []
stream.seek(gfx['offset'])
for _ in range(0, count):
bitplane = Bitplane.from_stream(stream, mode, width, height, planes)
# Create a surface, and use a masking mode if needed.
if gfx['mask'] == 'color_zero':
surface = bitplane.create_surface(None, palette, 0, 0, MaskMode.INDEX)
elif gfx['mask'] == 'none':
surface = bitplane.create_surface(None, palette, 0, 0, MaskMode.NONE)
elif gfx['mask'] == 'bitplane':
if gfx['mode'] == 'planar':
mask = bitplane.from_stream(stream, BitplaneType.PLANAR, width, height, planes)
else:
mask = bitplane.from_stream(stream, BitplaneType.CHUNKY, width, height, 1)
surface = bitplane.create_surface(mask, palette, 0, 0, MaskMode.BITPLANE)
else:
raise Exception('Unknown mask mode "{}".'.format(gfx['mask']))
if gfx['flip_y']:
surface = surface.flipped_y()
surfaces.append(surface)
if gfx['name'] in self.graphics:
self.graphics[gfx['name']].extend(surfaces)
else:
self.graphics[gfx['name']] = surfaces
