lib to write text on imgs

1 files changed, 125 insertions, 0 deletions

diff --git a/helper_libs/image_utils.py b/helper_libs/image_utils.py
new file mode 100644
index 0000000..70eaebb
--- /dev/null
+++ b/helper_libs/image_utils.py
@@ -0,0 +1,125 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+# Copyright 2011 Álvaro Justen [alvarojusten at gmail dot com]
+# License: GPL <http://www.gnu.org/copyleft/gpl.html>
+
+from PIL import Image, ImageDraw, ImageFont
+
+class ImageText(object):
+    def __init__(self, filename_or_size, mode='RGBA', background=(0, 0, 0, 0),
+                 encoding='utf8'):
+        if isinstance(filename_or_size, str):
+            self.filename = filename_or_size
+            self.image = Image.open(self.filename)
+            self.size = self.image.size
+        elif isinstance(filename_or_size, (list, tuple)):
+            self.size = filename_or_size
+            self.image = Image.new(mode, self.size, color=background)
+            self.filename = None
+        self.draw = ImageDraw.Draw(self.image)
+        self.encoding = encoding
+
+    def line(self, shape, fill):
+        self.draw.line(shape,fill=fill, width=10)
+
+    def save(self, filename=None):
+        self.image.save(filename or self.filename)
+
+    def get_font_size(self, text, font, max_width=None, max_height=None):
+        if max_width is None and max_height is None:
+            raise ValueError('You need to pass max_width or max_height')
+        font_size = 1
+        text_size = self.get_text_size(font, font_size, text)
+        if (max_width is not None and text_size[0] > max_width) or \
+           (max_height is not None and text_size[1] > max_height):
+            raise ValueError("Text can't be filled in only (%dpx, %dpx)" % \
+                    text_size)
+        while True:
+            if (max_width is not None and text_size[0] >= max_width) or \
+               (max_height is not None and text_size[1] >= max_height):
+                return font_size - 1
+            font_size += 1
+            text_size = self.get_text_size(font, font_size, text)
+
+    def write_text(self, coords, text, font_filename, font_size=11,
+                   color=(0, 0, 0), max_width=None, max_height=None):
+        if isinstance(text, str):
+            x,y = coords
+            text = text#.decode(self.encoding)
+        if font_size == 'fill' and \
+           (max_width is not None or max_height is not None):
+            font_size = self.get_font_size(text, font_filename, max_width,
+                                           max_height)
+        text_size = self.get_text_size(font_filename, font_size, text)
+        font = ImageFont.truetype(font_filename, font_size)
+        if x == 'center':
+            x = (self.size[0] - text_size[0]) / 2
+        if y == 'center':
+            y = (self.size[1] - text_size[1]) / 2
+        self.draw.text((x, y), text, font=font, fill=color)
+        return text_size
+
+    def get_text_size(self, font_filename, font_size, text):
+        font = ImageFont.truetype(font_filename, font_size)
+        return font.getsize(text)
+
+    def write_text_box(self, coords, text, box_width, font_filename,
+                       font_size=11, color=(0, 0, 0), place='left',
+                       justify_last_line=False):
+        x,y = coords
+        lines = []
+        line = []
+        words = text.split()
+        for word in words:
+            new_line = ' '.join(line + [word])
+            size = self.get_text_size(font_filename, font_size, new_line)
+            text_height = size[1]
+            if size[0] <= box_width:
+                line.append(word)
+            else:
+                lines.append(line)
+                line = [word]
+        if line:
+            lines.append(line)
+        lines = [' '.join(line) for line in lines if line]
+        height = y
+        for index, line in enumerate(lines):
+            height += text_height
+            if place == 'left':
+                self.write_text((x, height), line, font_filename, font_size,
+                                color)
+            elif place == 'right':
+                total_size = self.get_text_size(font_filename, font_size, line)
+                x_left = x + box_width - total_size[0]
+                self.write_text((x_left, height), line, font_filename,
+                                font_size, color)
+            elif place == 'center':
+                total_size = self.get_text_size(font_filename, font_size, line)
+                x_left = int(x + ((box_width - total_size[0]) / 2))
+                self.write_text((x_left, height), line, font_filename,
+                                font_size, color)
+            elif place == 'justify':
+                words = line.split()
+                if (index == len(lines) - 1 and not justify_last_line) or \
+                   len(words) == 1:
+                    self.write_text((x, height), line, font_filename, font_size,
+                                    color)
+                    continue
+                line_without_spaces = ''.join(words)
+                total_size = self.get_text_size(font_filename, font_size,
+                                                line_without_spaces)
+                space_width = (box_width - total_size[0]) / (len(words) - 1.0)
+                start_x = x
+                for word in words[:-1]:
+                    self.write_text((start_x, height), word, font_filename,
+                                    font_size, color)
+                    word_size = self.get_text_size(font_filename, font_size,
+                                                    word)
+                    start_x += word_size[0] + space_width
+                last_word_size = self.get_text_size(font_filename, font_size,
+                                                    words[-1])
+                last_word_x = x + box_width - last_word_size[0]
+                self.write_text((last_word_x, height), words[-1], font_filename,
+                                font_size, color)
+        return (box_width, height - y)
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