From 0402d388cb9803652c0f9a52ba7dcb6029fdd0b9 Mon Sep 17 00:00:00 2001 From: marha Date: Sat, 30 Apr 2011 15:25:48 +0000 Subject: Added extra needed files --- .../src/gallium/auxiliary/util/u_format_parse.py | 291 +++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100644 mesalib/src/gallium/auxiliary/util/u_format_parse.py (limited to 'mesalib/src/gallium/auxiliary/util/u_format_parse.py') diff --git a/mesalib/src/gallium/auxiliary/util/u_format_parse.py b/mesalib/src/gallium/auxiliary/util/u_format_parse.py new file mode 100644 index 000000000..f47f65d26 --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_format_parse.py @@ -0,0 +1,291 @@ +#!/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 + -- cgit v1.2.3