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author | marha <marha@users.sourceforge.net> | 2011-10-10 08:28:58 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2011-10-10 08:28:58 +0200 |
commit | baf98f9bb36f956245d83ecd04f90625d6d68d2b (patch) | |
tree | c4af86b7cdb9c57cc539fa0764050865233e3617 /mesalib/src/gallium/auxiliary/util/u_format_parse.py | |
parent | 7fae5492e3ef8e5fa15f742be4c2a15b9782e89a (diff) | |
parent | afbd3947071a33f59dda122f1ac396442a02c128 (diff) | |
download | vcxsrv-baf98f9bb36f956245d83ecd04f90625d6d68d2b.tar.gz vcxsrv-baf98f9bb36f956245d83ecd04f90625d6d68d2b.tar.bz2 vcxsrv-baf98f9bb36f956245d83ecd04f90625d6d68d2b.zip |
Merge remote-tracking branch 'origin/released'
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_format_parse.py')
-rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_format_parse.py | 594 |
1 files changed, 303 insertions, 291 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_format_parse.py b/mesalib/src/gallium/auxiliary/util/u_format_parse.py index f47f65d26..73a4bcb21 100644 --- a/mesalib/src/gallium/auxiliary/util/u_format_parse.py +++ b/mesalib/src/gallium/auxiliary/util/u_format_parse.py @@ -1,291 +1,303 @@ -#!/usr/bin/env python
-
-'''
-/**************************************************************************
- *
- * Copyright 2009 VMware, Inc.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-'''
-
-
-VOID, UNSIGNED, SIGNED, FIXED, FLOAT = range(5)
-
-SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W, SWIZZLE_0, SWIZZLE_1, SWIZZLE_NONE, = range(7)
-
-PLAIN = 'plain'
-
-RGB = 'rgb'
-SRGB = 'srgb'
-YUV = 'yuv'
-ZS = 'zs'
-
-
-def is_pot(x):
- return (x & (x - 1)) == 0
-
-
-VERY_LARGE = 99999999999999999999999
-
-
-class Channel:
- '''Describe the channel of a color channel.'''
-
- def __init__(self, type, norm, size, name = ''):
- self.type = type
- self.norm = norm
- self.size = size
- self.sign = type in (SIGNED, FIXED, FLOAT)
- self.name = name
-
- def __str__(self):
- s = str(self.type)
- if self.norm:
- s += 'n'
- s += str(self.size)
- return s
-
- def __eq__(self, other):
- return self.type == other.type and self.norm == other.norm and self.size == other.size
-
- def max(self):
- '''Maximum representable number.'''
- if self.type == FLOAT:
- return VERY_LARGE
- if self.type == FIXED:
- return (1 << (self.size/2)) - 1
- if self.norm:
- return 1
- if self.type == UNSIGNED:
- return (1 << self.size) - 1
- if self.type == SIGNED:
- return (1 << (self.size - 1)) - 1
- assert False
-
- def min(self):
- '''Minimum representable number.'''
- if self.type == FLOAT:
- return -VERY_LARGE
- if self.type == FIXED:
- return -(1 << (self.size/2))
- if self.type == UNSIGNED:
- return 0
- if self.norm:
- return -1
- if self.type == SIGNED:
- return -(1 << (self.size - 1))
- assert False
-
-
-class Format:
- '''Describe a pixel format.'''
-
- def __init__(self, name, layout, block_width, block_height, channels, swizzles, colorspace):
- self.name = name
- self.layout = layout
- self.block_width = block_width
- self.block_height = block_height
- self.channels = channels
- self.swizzles = swizzles
- self.name = name
- self.colorspace = colorspace
-
- def __str__(self):
- return self.name
-
- def short_name(self):
- '''Make up a short norm for a format, suitable to be used as suffix in
- function names.'''
-
- name = self.name
- if name.startswith('PIPE_FORMAT_'):
- name = name[len('PIPE_FORMAT_'):]
- name = name.lower()
- return name
-
- def block_size(self):
- size = 0
- for channel in self.channels:
- size += channel.size
- return size
-
- def nr_channels(self):
- nr_channels = 0
- for channel in self.channels:
- if channel.size:
- nr_channels += 1
- return nr_channels
-
- def is_array(self):
- if self.layout != PLAIN:
- return False
- ref_channel = self.channels[0]
- for channel in self.channels[1:]:
- if channel.size and (channel.size != ref_channel.size or channel.size % 8):
- return False
- return True
-
- def is_mixed(self):
- if self.layout != PLAIN:
- return False
- ref_channel = self.channels[0]
- if ref_channel.type == VOID:
- ref_channel = self.channels[1]
- for channel in self.channels[1:]:
- if channel.type != VOID:
- if channel.type != ref_channel.type:
- return True
- if channel.norm != ref_channel.norm:
- return True
- return False
-
- def is_pot(self):
- return is_pot(self.block_size())
-
- def is_int(self):
- if self.layout != PLAIN:
- return False
- for channel in self.channels:
- if channel.type not in (VOID, UNSIGNED, SIGNED):
- return False
- return True
-
- def is_float(self):
- if self.layout != PLAIN:
- return False
- for channel in self.channels:
- if channel.type not in (VOID, FLOAT):
- return False
- return True
-
- def is_bitmask(self):
- if self.layout != PLAIN:
- return False
- if self.block_size() not in (8, 16, 32):
- return False
- for channel in self.channels:
- if channel.type not in (VOID, UNSIGNED, SIGNED):
- return False
- return True
-
- def inv_swizzles(self):
- '''Return an array[4] of inverse swizzle terms'''
- inv_swizzle = [None]*4
- for i in range(4):
- swizzle = self.swizzles[i]
- if swizzle < 4:
- inv_swizzle[swizzle] = i
- return inv_swizzle
-
- def stride(self):
- return self.block_size()/8
-
-
-_type_parse_map = {
- '': VOID,
- 'x': VOID,
- 'u': UNSIGNED,
- 's': SIGNED,
- 'h': FIXED,
- 'f': FLOAT,
-}
-
-_swizzle_parse_map = {
- 'x': SWIZZLE_X,
- 'y': SWIZZLE_Y,
- 'z': SWIZZLE_Z,
- 'w': SWIZZLE_W,
- '0': SWIZZLE_0,
- '1': SWIZZLE_1,
- '_': SWIZZLE_NONE,
-}
-
-def parse(filename):
- '''Parse the format descrition in CSV format in terms of the
- Channel and Format classes above.'''
-
- stream = open(filename)
- formats = []
- for line in stream:
- try:
- comment = line.index('#')
- except ValueError:
- pass
- else:
- line = line[:comment]
- line = line.strip()
- if not line:
- continue
-
- fields = [field.strip() for field in line.split(',')]
-
- name = fields[0]
- layout = fields[1]
- block_width, block_height = map(int, fields[2:4])
-
- swizzles = [_swizzle_parse_map[swizzle] for swizzle in fields[8]]
- colorspace = fields[9]
-
- if layout == PLAIN:
- names = ['']*4
- if colorspace in (RGB, SRGB):
- for i in range(4):
- swizzle = swizzles[i]
- if swizzle < 4:
- names[swizzle] += 'rgba'[i]
- elif colorspace == ZS:
- for i in range(4):
- swizzle = swizzles[i]
- if swizzle < 4:
- names[swizzle] += 'zs'[i]
- else:
- assert False
- for i in range(4):
- if names[i] == '':
- names[i] = 'x'
- else:
- names = ['x', 'y', 'z', 'w']
-
- channels = []
- for i in range(0, 4):
- field = fields[4 + i]
- if field:
- type = _type_parse_map[field[0]]
- if field[1] == 'n':
- norm = True
- size = int(field[2:])
- else:
- norm = False
- size = int(field[1:])
- else:
- type = VOID
- norm = False
- size = 0
- channel = Channel(type, norm, size, names[i])
- channels.append(channel)
-
- format = Format(name, layout, block_width, block_height, channels, swizzles, colorspace)
- formats.append(format)
- return formats
-
+#!/usr/bin/env python + +''' +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ +''' + + +VOID, UNSIGNED, SIGNED, FIXED, FLOAT = range(5) + +SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W, SWIZZLE_0, SWIZZLE_1, SWIZZLE_NONE, = range(7) + +PLAIN = 'plain' + +RGB = 'rgb' +SRGB = 'srgb' +YUV = 'yuv' +ZS = 'zs' + + +def is_pot(x): + return (x & (x - 1)) == 0 + + +VERY_LARGE = 99999999999999999999999 + + +class Channel: + '''Describe the channel of a color channel.''' + + def __init__(self, type, norm, pure, size, name = ''): + self.type = type + self.norm = norm + self.pure = pure + self.size = size + self.sign = type in (SIGNED, FIXED, FLOAT) + self.name = name + + def __str__(self): + s = str(self.type) + if self.norm: + s += 'n' + if self.pure: + s += 'p' + s += str(self.size) + return s + + def __eq__(self, other): + return self.type == other.type and self.norm == other.norm and self.pure == other.pure and self.size == other.size + + def max(self): + '''Maximum representable number.''' + if self.type == FLOAT: + return VERY_LARGE + if self.type == FIXED: + return (1 << (self.size/2)) - 1 + if self.norm: + return 1 + if self.type == UNSIGNED: + return (1 << self.size) - 1 + if self.type == SIGNED: + return (1 << (self.size - 1)) - 1 + assert False + + def min(self): + '''Minimum representable number.''' + if self.type == FLOAT: + return -VERY_LARGE + if self.type == FIXED: + return -(1 << (self.size/2)) + if self.type == UNSIGNED: + return 0 + if self.norm: + return -1 + if self.type == SIGNED: + return -(1 << (self.size - 1)) + assert False + + +class Format: + '''Describe a pixel format.''' + + def __init__(self, name, layout, block_width, block_height, channels, swizzles, colorspace): + self.name = name + self.layout = layout + self.block_width = block_width + self.block_height = block_height + self.channels = channels + self.swizzles = swizzles + self.name = name + self.colorspace = colorspace + + def __str__(self): + return self.name + + def short_name(self): + '''Make up a short norm for a format, suitable to be used as suffix in + function names.''' + + name = self.name + if name.startswith('PIPE_FORMAT_'): + name = name[len('PIPE_FORMAT_'):] + name = name.lower() + return name + + def block_size(self): + size = 0 + for channel in self.channels: + size += channel.size + return size + + def nr_channels(self): + nr_channels = 0 + for channel in self.channels: + if channel.size: + nr_channels += 1 + return nr_channels + + def is_array(self): + if self.layout != PLAIN: + return False + ref_channel = self.channels[0] + for channel in self.channels[1:]: + if channel.size and (channel.size != ref_channel.size or channel.size % 8): + return False + return True + + def is_mixed(self): + if self.layout != PLAIN: + return False + ref_channel = self.channels[0] + if ref_channel.type == VOID: + ref_channel = self.channels[1] + for channel in self.channels[1:]: + if channel.type != VOID: + if channel.type != ref_channel.type: + return True + if channel.norm != ref_channel.norm: + return True + if channel.pure != ref_channel.pure: + return True + return False + + def is_pot(self): + return is_pot(self.block_size()) + + def is_int(self): + if self.layout != PLAIN: + return False + for channel in self.channels: + if channel.type not in (VOID, UNSIGNED, SIGNED): + return False + return True + + def is_float(self): + if self.layout != PLAIN: + return False + for channel in self.channels: + if channel.type not in (VOID, FLOAT): + return False + return True + + def is_bitmask(self): + if self.layout != PLAIN: + return False + if self.block_size() not in (8, 16, 32): + return False + for channel in self.channels: + if channel.type not in (VOID, UNSIGNED, SIGNED): + return False + return True + + def inv_swizzles(self): + '''Return an array[4] of inverse swizzle terms''' + inv_swizzle = [None]*4 + for i in range(4): + swizzle = self.swizzles[i] + if swizzle < 4: + inv_swizzle[swizzle] = i + return inv_swizzle + + def stride(self): + return self.block_size()/8 + + +_type_parse_map = { + '': VOID, + 'x': VOID, + 'u': UNSIGNED, + 's': SIGNED, + 'h': FIXED, + 'f': FLOAT, +} + +_swizzle_parse_map = { + 'x': SWIZZLE_X, + 'y': SWIZZLE_Y, + 'z': SWIZZLE_Z, + 'w': SWIZZLE_W, + '0': SWIZZLE_0, + '1': SWIZZLE_1, + '_': SWIZZLE_NONE, +} + +def parse(filename): + '''Parse the format descrition in CSV format in terms of the + Channel and Format classes above.''' + + stream = open(filename) + formats = [] + for line in stream: + try: + comment = line.index('#') + except ValueError: + pass + else: + line = line[:comment] + line = line.strip() + if not line: + continue + + fields = [field.strip() for field in line.split(',')] + + name = fields[0] + layout = fields[1] + block_width, block_height = map(int, fields[2:4]) + + swizzles = [_swizzle_parse_map[swizzle] for swizzle in fields[8]] + colorspace = fields[9] + + if layout == PLAIN: + names = ['']*4 + if colorspace in (RGB, SRGB): + for i in range(4): + swizzle = swizzles[i] + if swizzle < 4: + names[swizzle] += 'rgba'[i] + elif colorspace == ZS: + for i in range(4): + swizzle = swizzles[i] + if swizzle < 4: + names[swizzle] += 'zs'[i] + else: + assert False + for i in range(4): + if names[i] == '': + names[i] = 'x' + else: + names = ['x', 'y', 'z', 'w'] + + channels = [] + for i in range(0, 4): + field = fields[4 + i] + if field: + type = _type_parse_map[field[0]] + if field[1] == 'n': + norm = True + pure = False + size = int(field[2:]) + elif field[1] == 'p': + pure = True + norm = False + size = int(field[2:]) + else: + norm = False + pure = False + size = int(field[1:]) + else: + type = VOID + norm = False + pure = False + size = 0 + channel = Channel(type, norm, pure, size, names[i]) + channels.append(channel) + + format = Format(name, layout, block_width, block_height, channels, swizzles, colorspace) + formats.append(format) + return formats + |