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SickGear/lib/hachoir/parser/game/blp.py
SickGear e56303798c Change bump to major version 3.xx to signal that this branch supports Python3+ only. 
Initial SickGear for Python 3.
2023-02-09 13:41:15 +00:00

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"""
Blizzard BLP Image File Parser
Author: Robert Xiao
Creation date: July 10 2007
- BLP1 File Format
http://magos.thejefffiles.com/War3ModelEditor/MagosBlpFormat.txt
- BLP2 File Format (Wikipedia)
http://en.wikipedia.org/wiki/.BLP
- S3TC (DXT1, 3, 5) Formats
http://en.wikipedia.org/wiki/S3_Texture_Compression
"""
from hachoir.core.endian import LITTLE_ENDIAN
from hachoir.field import String, UInt32, UInt8, Enum, FieldSet, RawBytes, GenericVector, Bit, Bits
from hachoir.parser.parser import Parser
from hachoir.parser.image.common import PaletteRGBA
from hachoir.core.tools import alignValue
class PaletteIndex(UInt8):
def createDescription(self):
return "Palette index %i (%s)" % (self.value, self["/palette/color[%i]" % self.value].description)
class Generic2DArray(FieldSet):
def __init__(self, parent, name, width, height, item_class, row_name="row", item_name="item", *args, **kwargs):
FieldSet.__init__(self, parent, name, *args, **kwargs)
self.width = width
self.height = height
self.item_class = item_class
self.row_name = row_name
self.item_name = item_name
def createFields(self):
for i in range(self.height):
yield GenericVector(self, self.row_name + "[]", self.width, self.item_class, self.item_name)
class BLP1File(Parser):
MAGIC = b"BLP1"
PARSER_TAGS = {
"id": "blp1",
"category": "game",
"file_ext": ("blp",),
"mime": ("application/x-blp",), # TODO: real mime type???
"magic": ((MAGIC, 0),),
"min_size": 7 * 32, # 7 DWORDs start, incl. magic
"description": "Blizzard Image Format, version 1",
}
endian = LITTLE_ENDIAN
def validate(self):
if self.stream.readBytes(0, 4) != b"BLP1":
return "Invalid magic"
return True
def createFields(self):
yield String(self, "magic", 4, "Signature (BLP1)")
yield Enum(UInt32(self, "compression"), {
0: "JPEG Compression",
1: "Uncompressed"})
yield UInt32(self, "flags")
yield UInt32(self, "width")
yield UInt32(self, "height")
yield Enum(UInt32(self, "type"), {
3: "Uncompressed Index List + Alpha List",
4: "Uncompressed Index List + Alpha List",
5: "Uncompressed Index List"})
yield UInt32(self, "subtype")
for i in range(16):
yield UInt32(self, "mipmap_offset[]")
for i in range(16):
yield UInt32(self, "mipmap_size[]")
compression = self["compression"].value
image_type = self["type"].value
width = self["width"].value
height = self["height"].value
if compression == 0: # JPEG Compression
yield UInt32(self, "jpeg_header_len")
yield RawBytes(self, "jpeg_header", self["jpeg_header_len"].value, "Shared JPEG Header")
else:
yield PaletteRGBA(self, "palette", 256)
offsets = self.array("mipmap_offset")
sizes = self.array("mipmap_size")
for i in range(16):
if not offsets[i].value or not sizes[i].value:
continue
padding = self.seekByte(offsets[i].value)
if padding:
yield padding
if compression == 0:
yield RawBytes(self, "mipmap[%i]" % i, sizes[i].value, "JPEG data, append to header to recover complete image")
elif compression == 1:
yield Generic2DArray(self, "mipmap_indexes[%i]" % i, width, height, PaletteIndex, "row", "index", "Indexes into the palette")
if image_type in (3, 4):
yield Generic2DArray(self, "mipmap_alphas[%i]" % i, width, height, UInt8, "row", "alpha", "Alpha values")
width /= 2
height /= 2
def interp_avg(data_low, data_high, n):
"""Interpolated averages. For example,
>>> list(interp_avg(1, 10, 3))
[4, 7]
"""
if isinstance(data_low, int):
for i in range(1, n):
yield (data_low * (n - i) + data_high * i) / n
else: # iterable
pairs = list(zip(data_low, data_high))
pair_iters = [interp_avg(x, y, n) for x, y in pairs]
for i in range(1, n):
yield [next(iter) for iter in pair_iters]
def color_name(data, bits):
"""Color names in #RRGGBB format, given the number of bits for each component."""
ret = ["#"]
for i in range(3):
ret.append("%02X" % (data[i] << (8 - bits[i])))
return ''.join(ret)
class DXT1(FieldSet):
static_size = 64
def __init__(self, parent, name, dxt2_mode=False, *args, **kwargs):
"""with dxt2_mode on, this field will always use the four color model"""
FieldSet.__init__(self, parent, name, *args, **kwargs)
self.dxt2_mode = dxt2_mode
def createFields(self):
values = [[], []]
for i in (0, 1):
yield Bits(self, "blue[]", 5)
yield Bits(self, "green[]", 6)
yield Bits(self, "red[]", 5)
values[i] = [self["red[%i]" % i].value,
self["green[%i]" % i].value,
self["blue[%i]" % i].value]
if values[0] > values[1] or self.dxt2_mode:
values += interp_avg(values[0], values[1], 3)
else:
values += interp_avg(values[0], values[1], 2)
values.append(None) # transparent
for i in range(16):
pixel = Bits(self, "pixel[%i][%i]" % divmod(i, 4), 2)
color = values[pixel.value]
if color is None:
pixel._description = "Transparent"
else:
pixel._description = "RGB color: %s" % color_name(color, [
5, 6, 5])
yield pixel
class DXT3Alpha(FieldSet):
static_size = 64
def createFields(self):
for i in range(16):
yield Bits(self, "alpha[%i][%i]" % divmod(i, 4), 4)
class DXT3(FieldSet):
static_size = 128
def createFields(self):
yield DXT3Alpha(self, "alpha", "Alpha Channel Data")
yield DXT1(self, "color", True, "Color Channel Data")
class DXT5Alpha(FieldSet):
static_size = 64
def createFields(self):
values = []
yield UInt8(self, "alpha_val[0]", "First alpha value")
values.append(self["alpha_val[0]"].value)
yield UInt8(self, "alpha_val[1]", "Second alpha value")
values.append(self["alpha_val[1]"].value)
if values[0] > values[1]:
values += interp_avg(values[0], values[1], 7)
else:
values += interp_avg(values[0], values[1], 5)
values += [0, 255]
for i in range(16):
pixel = Bits(self, "alpha[%i][%i]" % divmod(i, 4), 3)
alpha = values[pixel.value]
pixel._description = "Alpha value: %i" % alpha
yield pixel
class DXT5(FieldSet):
static_size = 128
def createFields(self):
yield DXT5Alpha(self, "alpha", "Alpha Channel Data")
yield DXT1(self, "color", True, "Color Channel Data")
class BLP2File(Parser):
MAGIC = b"BLP2"
PARSER_TAGS = {
"id": "blp2",
"category": "game",
"file_ext": ("blp",),
"mime": ("application/x-blp",),
"magic": ((MAGIC, 0),),
"min_size": 5 * 32, # 5 DWORDs start, incl. magic
"description": "Blizzard Image Format, version 2",
}
endian = LITTLE_ENDIAN
def validate(self):
if self.stream.readBytes(0, 4) != b"BLP2":
return "Invalid magic"
return True
def createFields(self):
yield String(self, "magic", 4, "Signature (BLP2)")
yield Enum(UInt32(self, "compression", "Compression type"), {
0: "JPEG Compressed",
1: "Uncompressed or DXT/S3TC compressed"})
yield Enum(UInt8(self, "encoding", "Encoding type"), {
1: "Raw",
2: "DXT/S3TC Texture Compression (a.k.a. DirectX)"})
yield UInt8(self, "alpha_depth", "Alpha channel depth, in bits (0 = no alpha)")
yield Enum(UInt8(self, "alpha_encoding", "Encoding used for alpha channel"), {
0: "DXT1 alpha (0 or 1 bit alpha)",
1: "DXT3 alpha (4 bit alpha)",
7: "DXT5 alpha (8 bit interpolated alpha)"})
yield Enum(UInt8(self, "has_mips", "Are mip levels present?"), {
0: "No mip levels",
1: "Mip levels present; number of levels determined by image size"})
yield UInt32(self, "width", "Base image width")
yield UInt32(self, "height", "Base image height")
for i in range(16):
yield UInt32(self, "mipmap_offset[]")
for i in range(16):
yield UInt32(self, "mipmap_size[]")
yield PaletteRGBA(self, "palette", 256)
compression = self["compression"].value
encoding = self["encoding"].value
alpha_depth = self["alpha_depth"].value
alpha_encoding = self["alpha_encoding"].value
width = self["width"].value
height = self["height"].value
if compression == 0: # JPEG Compression
yield UInt32(self, "jpeg_header_len")
yield RawBytes(self, "jpeg_header", self["jpeg_header_len"].value, "Shared JPEG Header")
offsets = self.array("mipmap_offset")
sizes = self.array("mipmap_size")
for i in range(16):
if not offsets[i].value or not sizes[i].value:
continue
padding = self.seekByte(offsets[i].value)
if padding:
yield padding
if compression == 0:
yield RawBytes(self, "mipmap[%i]" % i, sizes[i].value, "JPEG data, append to header to recover complete image")
elif compression == 1 and encoding == 1:
yield Generic2DArray(self, "mipmap_indexes[%i]" % i, height, width, PaletteIndex, "row", "index", "Indexes into the palette")
if alpha_depth == 1:
yield GenericVector(self, "mipmap_alphas[%i]" % i, height, width, Bit, "row", "is_opaque", "Alpha values")
elif alpha_depth == 8:
yield GenericVector(self, "mipmap_alphas[%i]" % i, height, width, UInt8, "row", "alpha", "Alpha values")
elif compression == 1 and encoding == 2:
block_height = alignValue(height, 4) // 4
block_width = alignValue(width, 4) // 4
if alpha_depth in [0, 1] and alpha_encoding == 0:
yield Generic2DArray(self, "mipmap[%i]" % i, block_height, block_width, DXT1, "row", "block", "DXT1-compressed image blocks")
elif alpha_depth == 8 and alpha_encoding == 1:
yield Generic2DArray(self, "mipmap[%i]" % i, block_height, block_width, DXT3, "row", "block", "DXT3-compressed image blocks")
elif alpha_depth == 8 and alpha_encoding == 7:
yield Generic2DArray(self, "mipmap[%i]" % i, block_height, block_width, DXT5, "row", "block", "DXT5-compressed image blocks")
width /= 2
height /= 2
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