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#!/usr/bin/python2.7
import sys
import os
from config import *
from pb import Pb
_default_tag = "im"
_gravity_params = [
"NorthWest", "North", "NorthEast", "West",
"Center", "East", "SouthWest", "South", "SouthEast"
]
_gravity_default = "Center"
_compose_params = [
"Over", "ATop", "Dst_Over", "Dst_In", "Dst_Out", "Multiply",
"Screen", "Divide", "Plus", "Difference", "Exclusion", "Pin_Light",
"Lighten", "Darken", "Overlay", "Hard_Light", "Soft_Light",
"Linear_Dodge", "Linear_Burn", "Color_Dodge", "Color_Burn"
]
_dispose_params = ["None", "Previous", "Background"]
_dispose_default = "None"
class PbGenerate(Pb):
#{{{ example params
example_params = {
"""Example params. Used with the classmethod Pb.run_example"""
'nearest': 'true',
'compose': 'Soft_Light',
'coalesce': 'true',
'dispose': 'None',
'gravity': 'Center',
'width': '200',
'black': 'black',
'tile': 'true',
'white': 'white',
'contrast': '100',
'hue': '90',
'saturation': '100',
'merge_early': 'true',
'format': 'gif',
'background': 'http://i.asdf.us/im/bc/new_1430440747.gif',
'subtract': '#EE7AE9',
'transparent': 'true',
'name': 'yo',
'url': 'http://asdf.us/im/new.gif',
'flop': 'true',
'flip': 'false',
'callback': 'jsonp1430442384162',
'fuzz': '5'
}
#}}}
def __init__(self, **kwargs):
super(PbGenerate, self).__init__(**kwargs)
_definitions = {
"""
Used to assert the value-types of the incoming parameters.
Types are defined as in their individual params classes.
"""
#IMAGES
"url": {'type': "img_url"},
"background": {'type': "img_url"},
#BOOLS
"coalesce": {'type': "bool"},
"nearest": {'type': "bool"},
"merge_early": {'type': "bool"},
"flip": {'type': "bool"},
"flop": {'type': "bool"},
"tile": {'type': "bool"},
"transparent": {'type': "bool"},
#COLORS
"black": {'type': "color", 'default': 'black'},
"white": {'type': "color", 'default': 'white'},
"subtract": {'type': "color"},
#INTS
"fuzz": {'type': "int"},
"width": {'type': "int"},
"height": {'type': "int"},
"brightness": {'type': "int"},
"contrast": {'type': "int"},
"saturation": {'type': "int"},
"rotate": {'type': "int"},
"hue": {'type': "int"},
#ENUMS
"compose": {'type': "enum", 'enum_values': _compose_params, 'default': "Atop"},
"gravity": {'type': "enum", 'enum_values': _gravity_params, 'default': _gravity_default},
"dispose": {'type': "enum", 'enum_values': _dispose_params, 'default': "None"},
"format": {'type': "enum", 'enum_values': OUTPUT_IMAGE_TYPES, 'default': DEFAULT_FINALFORMAT},
#STRINGS
"username": {'type': "string"},
"callback": {'type': "string"},
}
"""Definitions and arguments are merged into attributes of the params object"""
self.params.definitions_import(_definitions, kwargs, classname=self.__class__.__name__)
"""Used for the database tag column. Allows for tracking of the type
of overlay method used."""
self.tag = _default_tag
if self.params.background: self.tag = self.params.compose
if self.params.transparent: self.tag = self.params.transparent
self.filename, self.filepath = self._filename_filepath_create(
url=self.params.url['url'], extension=self.params.format
)
self._db_url_param = str(self.params.url['url'])
def _composite (self):
"""Imagemagick composite command"""
cmd = [
BIN_CONVERT, self.params.background['path'],
"null:", self.filepath, "-matte",
"-dispose", self.params.dispose,
"-gravity", self.params.gravity,
"-compose", self.params.compose, "-layers", "composite",
self.filepath
]
self._call_cmd(cmd)
def _convert(self):
"""Imagemagick convert command"""
cmd = [BIN_CONVERT, self.params.url['path']]
if self.params.rotate: cmd += ["-rotate", self.params.rotate]
if self.params.flip: cmd += ["-flip"]
if self.params.flop: cmd += ["-flop"]
if self.params.transparent:
if self.params.fuzz:
cmd += ["-fuzz", "{}%".format(self.params.fuzz)]
cmd += ["-transparent", self.params.subtract]
if self.params.width or self.params.height:
if self.params.nearest and self.params.format == "gif":
cmd += ["-coalesce","+map","-interpolate","Nearest","-interpolative-resize"]
else:
cmd.append("-resize")
cmd += ["{}x{}".format(self.params.width or "", self.params.height or "")]
if self.params.black != "black" or self.params.white != 'white':
cmd += ["+level-colors" , "{},{}".format(self.params.black, self.params.white)]
if self.params.contrast: cmd += ['-contrast-stretch', self.params.contrast]
if self.params.brightness or self.params.saturation or self.params.hue:
cmd += [
"-modulate", "{},{},{}".format(
self.params.brightness or 100,
self.params.contrast or 100,
self.params.hue or 100
)
]
cmd.append("-coalesce"); #why? #FIXME
cmd += [self.filepath]
self._call_cmd(cmd)
def create(self):
self._convert()
if self.params.background:
self._composite()
super(PbGenerate, self).create()
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