adding image module
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Rolux
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ox/image.py
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185
ox/image.py
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division
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from hashlib import sha1
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import Image
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import ImageDraw
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import ImageFont
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def drawText(image, position, text, font_file, font_size, color):
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draw = ImageDraw.Draw(image)
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font = ImageFont.truetype(font_file, font_size, encoding='unic')
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draw.text(position, text, fill=color, font=font)
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return draw.textsize(text, font=font)
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def getHSL(rgb):
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rgb = map(lambda x: x / 255, rgb)
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maximum = max(rgb)
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minimum = min(rgb)
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hsl = [0.0, 0.0, 0.0]
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hsl[2] = (maximum + minimum) / 2
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if maximum == minimum:
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hsl[0] = 0.0
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hsl[1] = 0.0
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else:
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if maximum == rgb[0]:
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hsl[0] = (60 * (rgb[1] - rgb[2]) / (maximum - minimum) + 360) % 360
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elif maximum == rgb[1]:
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hsl[0] = 60 * (rgb[2] - rgb[0]) / (maximum - minimum) + 120
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else:
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hsl[0] = 60 * (rgb[0] - rgb[1]) / (maximum - minimum) + 240
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if hsl[2] <= 0.5:
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hsl[1] = (maximum - minimum) / (2 * hsl[2])
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else:
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hsl[1] = (maximum - minimum) / (2 - 2 * hsl[2])
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return tuple(hsl)
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def getImageHeat(image_file):
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image = Image.open(image_file).resize((16, 16), Image.ANTIALIAS)
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pixel = image.load()
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image_heat = 0
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for y in range(image.size[1]):
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for x in range(image.size[0]):
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pixel_heat = []
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for y_ in range(max(y - 1, 0), min(y + 2, image.size[1])):
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for x_ in range(max(x - 1, 0), min(x + 2, image.size[0])):
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if x != x_ or y != y_:
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for c in range(3):
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pixel_heat.append(abs(pixel[x, y][c] - pixel[x_, y_][c]))
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image_heat += sum(pixel_heat) / len(pixel_heat)
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return image_heat / 256
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def getImageHSL(image_file):
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image = Image.open(image_file).resize((1, 1), Image.ANTIALIAS)
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return getHSL(image.getpixel((0, 0)))
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def getRGB(hsl):
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hsl = list(hsl)
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hsl[0] /= 360
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rgb = [0, 0, 0]
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if hsl[1] == 0:
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rgb = [hsl[2], hsl[2], hsl[2]]
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else:
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if hsl[2] < 1/2:
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v2 = hsl[2] * (1 + hsl[1])
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else:
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v2 = hsl[1] + hsl[2] - (hsl[1] * hsl[2])
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v1 = 2 * hsl[2] - v2
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for i in range(3):
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v3 = hsl[0] + (1 - i) * 1/3;
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if v3 < 0:
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v3 += 1
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elif v3 > 1:
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v3 -= 1
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if v3 < 1/6:
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rgb[i] = v1 + ((v2 - v1) * 6 * v3)
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elif v3 < 1/2:
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rgb[i] = v2
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elif v3 < 2/3:
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rgb[i] = v1 + ((v2 - v1) * 6 * (2/3 - v3))
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else:
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rgb[i] = v1
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return tuple(map(lambda x: int(x * 255), rgb))
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def wrapText(text, max_width, max_lines, font_file, font_size):
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# wraps text to max_width and max_lines
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def get_width(string):
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return draw.textsize(string, font=font)[0]
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image = Image.new('RGB', (1, 1))
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draw = ImageDraw.Draw(image)
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font = ImageFont.truetype(font_file, font_size, encoding='unic')
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ellipsis = '…'.decode('utf-8')
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separators = ['-', '+', '/', ':']
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if get_width(text) <= max_width:
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# text fits in one line
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lines = [text]
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else:
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if max_lines:
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# test if the same number of lines
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# can be achieved with shorter lines
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best_lines = len(wrap_text(text, max_width, 0, font_file, font_size))
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test_lines = best_lines
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while test_lines == best_lines:
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max_width -= 1
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test_lines = len(wrap_text(text, max_width, 0, font_file, font_size))
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max_width += 1
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words = []
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spaces = []
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test_words = text.split(' ')
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for word in test_words:
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if get_width(word) <= max_width:
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# word fits in one line
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words.append(word)
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spaces.append(' ')
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else:
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# word does not fit in one line
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position = 0
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test_word = word
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for separator in separators:
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test_word = test_word.replace(separator, ' ')
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parts = test_word.split(' ')
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for i, part in enumerate(parts):
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words.append(part)
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if i < len(parts) - 1:
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position += len(part) + 1
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spaces.append(word[position - 1])
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else:
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spaces.append(' ')
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lines = ['']
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for i, word in enumerate(words):
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line = len(lines) - 1
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word_width = get_width(word)
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if word_width <= max_width:
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# word fits in one line
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test = (lines[line] + word + spaces[i]).strip()
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if get_width(test) <= max_width:
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# word fits in current line
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lines[line] = test + (' ' if spaces[i] == ' ' else '')
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elif max_lines == 0 or line < max_lines - 1:
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# word fits in next line
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lines.append(word + spaces[i])
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else:
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# word does not fit in last line
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test = lines[line].strip() + ellipsis
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if get_width(test) <= max_width:
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# ellipsis fits in last line
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lines[line] = test
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else:
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# ellipsis does not fit in last line
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test_words = lines[line].split(' ')
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while get_width(test) > max_width:
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test_words.pop()
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test = ' '.join(test_words) + ellipsis
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if test == ellipsis:
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# ellipsis does not fit after first word of last line
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test = lines[line][:-1] + ellipsis
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while get_width(test) > max_width:
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test = test[:-2] + ellipsis
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lines[line] = test
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break
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else:
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# word does not fit in one line
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lines[line] += ' '
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chars = list(word)
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for char in chars:
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line = len(lines) - 1
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test = (lines[line] + char + '-').strip()
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if get_width(test) <= max_width:
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# char fits in current line
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lines[line] = test[:-1]
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elif max_lines == 0 or line < max_lines - 1:
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# char fits in next line
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if test[-3] == ' ':
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lines[line] = test[:-3]
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else:
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lines[line] = test[:-2] + '-'
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lines.append(char)
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else:
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# char does not fit in last line
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test = lines[line] + char + ellipsis
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while get_width(test) > max_width:
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test = test[:-2] + ellipsis
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lines[line] = test
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return lines
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