From 6e6b02aa26f52e5cf67b5fb24ef4be818c4d8de4 Mon Sep 17 00:00:00 2001
From: Aleksander Majda <nazgut@gmail.com>
Date: Mon, 21 Apr 2025 17:38:59 +0200
Subject: [PATCH] fix text position calculation

---
 text_to_image.py | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/text_to_image.py b/text_to_image.py
index af7e886..9c63b1e 100644
--- a/text_to_image.py
+++ b/text_to_image.py
@@ -100,7 +100,7 @@ class BookToolsTextToImage:
             # Fallback to simple width calculation
             return sum(font.getbbox(char)[2] - font.getbbox(char)[0] for char in text)
 
-    def calculate_text_size(self, text, font_size, font_path, max_width, max_height, line_height_factor):
+    def calculate_text_size(self, text, font_size, font_path, max_width, max_height, line_height_factor, char_spacing_factor):
         try:
             font = ImageFont.truetype(font_path, font_size)
         except Exception as e:
@@ -109,19 +109,18 @@ class BookToolsTextToImage:
             
         paragraphs = text.split('\n')
         lines = []
-        
         max_line_width = 0
-        
+
+        # compute pixel spacing from factor
+        char_spacing = font_size * char_spacing_factor
+
         for paragraph in paragraphs:
             words = paragraph.split()
             current_line = []
             current_width = 0
             
-            # Consider character spacing in the width calculation
-            char_spacing = font_size * 0.2  # Default char_spacing from parameters
-            
             for word in words:
-                # Get word width including spacing between characters
+                # measure word width using char_spacing
                 word_width = 0
                 for char in word:
                     bbox = font.getbbox(char)
@@ -434,7 +433,7 @@ class BookToolsTextToImage:
             
             # First check if min_font_size fits
             lines, fits, actual_width, actual_height = self.calculate_text_size(
-                text, min_font_size, font, effective_width, effective_height, line_height_factor
+                text, min_font_size, font, effective_width, effective_height, line_height_factor, char_spacing
             )
             
             if fits:
@@ -442,7 +441,7 @@ class BookToolsTextToImage:
                 while low <= high:
                     mid = (low + high) // 2
                     lines, fits, actual_width, actual_height = self.calculate_text_size(
-                        text, mid, font, effective_width, effective_height, line_height_factor
+                        text, mid, font, effective_width, effective_height, line_height_factor, char_spacing
                     )
                     
                     if fits: