-#!/usr/bin/env python
#
# Copyright 2009 VMware, Inc.
# Copyright 2014 Intel Corporation
YUV = 'yuv'
ZS = 'zs'
-def is_power_of_two(x):
- return not bool(x & (x - 1))
-
VERY_LARGE = 99999999999999999999999
class Channel:
else:
return 1
- def is_power_of_two(self):
- """Returns true if the size of this channel is a power of two."""
- return is_power_of_two(self.size)
-
def datatype(self):
"""Returns the datatype corresponding to a channel type and size"""
return _get_datatype(self.type, self.size)
class Format:
"""Describes a pixel format."""
- def __init__(self, name, layout, block_width, block_height, channels, swizzle, colorspace):
+ def __init__(self, name, layout, block_width, block_height, block_depth, channels, swizzle, colorspace):
"""Constructs a Format from some metadata and a list of channels.
The channel objects must be unique to this Format and should not be
layout -- One of 'array', 'packed' 'other', or a compressed layout
block_width -- The block width if the format is compressed, 1 otherwise
block_height -- The block height if the format is compressed, 1 otherwise
+ block_depth -- The block depth if the format is compressed, 1 otherwise
channels -- A list of Channel objects
swizzle -- A Swizzle from this format to rgba
colorspace -- one of 'rgb', 'srgb', 'yuv', or 'zs'
self.layout = layout
self.block_width = block_width
self.block_height = block_height
+ self.block_depth = block_depth
self.channels = channels
assert isinstance(swizzle, Swizzle)
self.swizzle = swizzle
def is_compressed(self):
"""Returns true if this is a compressed format."""
- return self.block_width != 1 or self.block_height != 1
+ return self.block_width != 1 or self.block_height != 1 or self.block_depth != 1
def is_int(self):
"""Returns true if this format is an integer format.
return channels
def parse(filename):
- """Parse a format descrition in CSV format.
+ """Parse a format description in CSV format.
This function parses the given CSV file and returns an iterable of
channels."""
layout = fields[1]
block_width = int(fields[2])
block_height = int(fields[3])
- colorspace = fields[9]
+ block_depth = int(fields[4])
+ colorspace = fields[10]
try:
- swizzle = Swizzle(fields[8])
+ swizzle = Swizzle(fields[9])
except:
sys.exit("error parsing swizzle for format " + name)
- channels = _parse_channels(fields[4:8], layout, colorspace, swizzle)
+ channels = _parse_channels(fields[5:9], layout, colorspace, swizzle)
- yield Format(name, layout, block_width, block_height, channels, swizzle, colorspace)
+ yield Format(name, layout, block_width, block_height, block_depth, channels, swizzle, colorspace)