Adjust project exporting

canvas.py

@@ -90,17 +90,9 @@ class EditorCanvas(tkinter.Canvas):
                 self.current_char_pixels[x]=0
             self.draw()
             return
-        base64_data=self.project.chars[chr(self.current_char)]
-        pixels=base64.b64decode(base64_data.encode("ascii"))
-        pixel_index=0
-        for pixel in pixels:
-            if pixel_index>=len(self.current_char_pixels):
-                break
-            for x in range(8):
-                if pixel_index>=len(self.current_char_pixels):
-                    break
-                self.current_char_pixels[pixel_index]=(pixel>>(7-x))&1
-                pixel_index+=1
+        pixels=self.project.decode_char(chr(self.current_char))
+        for x in range(len(pixels)):
+            self.current_char_pixels[x]=pixels[x]
         self.draw()
 
 

main.py

@@ -1,6 +1,6 @@
 import os
+import tkinter.filedialog
 import unicodedata
-from exporter import export
 
 from canvas import *
 from project import *
@@ -116,6 +116,27 @@ def save_project(ask):
         tkinter.messagebox.showerror("Saving project",f"Failed to save project '{path}': {e}")
 
 
+def export_project(ask):
+    if not project.loaded:
+        return
+
+    path=None
+    if project.export_path and not ask:
+        path=project.export_path
+    else:
+        path = tkinter.filedialog.askdirectory(
+            title="Choose folder where exported pages will be saved"
+        )
+        if path=="" or path==():
+            return
+
+    canvas_editor.save_char()
+    try:
+        project.export(path)
+    except IOError as e:
+        tkinter.messagebox.showerror("Exporting project",f"Failed to export project: {e}")
+
+
 def button_prev_glyph_click():
     global canvas_editor
     global project
@@ -182,7 +203,11 @@ menu_file.add_command(label="New project",command=menu_file_new_project_click)
 menu_file.add_command(label="Open project",command=menu_file_open_project_click)
 menu_file.add_command(label="Save project",command=lambda: save_project(False))
 menu_file.add_command(label="Save project as",command=lambda: save_project(True))
+menu_export=tkinter.Menu(menubar,tearoff=False)
+menu_export.add_command(label="Export",command=lambda: export_project(False))
+menu_export.add_command(label="Export as",command=lambda: export_project(True))
 menubar.add_cascade(label="File",menu=menu_file)
+menubar.add_cascade(label="Export",menu=menu_export)
 
 canvas_editor=EditorCanvas(project,window,bg="black")
 canvas_editor.pack(side="left",fill="both",expand=True)

project.py

@@ -1,10 +1,19 @@
+import base64
 import json
+import PIL.Image
+
+def create_zeroed_array(length):
+    output=[]
+    for _ in range(length):
+        output.append(0)
+    return output
 
 class Project:
     def __init__(self):
         self.chars={}
         self.char_res=(0,0)
         self.path=None
+        self.export_path=None
         self.loaded=False
         self.modified=False
 
@@ -38,5 +47,68 @@ class Project:
         self.loaded=True
 
 
+    def export(self,path):
+        chars = tuple(self.chars.items())
+
+        # there will be 256 characters per page
+        last_char_idx = len(chars) - 1
+
+        page_res = (self.char_res[0] * 16,self.char_res[1] * 16)
+
+        page = 0
+        page_char_x = 0
+        page_char_y = 0
+        for char_idx, char in enumerate(chars):
+            if page_char_x == 0 and page_char_y == 0:
+                page_arr = create_zeroed_array(page_res[0]*page_res[1])
+                char_map_string = ""
+
+            char_bitmap=self.decode_char(char[0])
+
+            # put char_bitmap onto page_img at correct position
+            for i in range(len(char_bitmap)):
+                x=i//self.char_res[1]+page_char_x*self.char_res[0]
+                y=i%self.char_res[1]+page_char_y*self.char_res[1]
+                page_arr[y*page_res[0]+x]=char_bitmap[i]
+
+            char_map_string += char[0]
+            page_char_x += 1
+
+            if page_char_x == 16:
+                page_char_x = 0
+                page_char_y += 1
+
+            if page_char_y == 16 or char_idx == last_char_idx:
+                ## save page
+                for x in range(len(page_arr)):
+                    page_arr[x]*=255
+                page_img = PIL.Image.frombytes("L",page_res,bytes(page_arr))
+
+                # save page
+                page_img.save(f"{path}/page_{page}.png")
+
+                # save char map
+                with open(f"{path}/page_{page}.txt", "w", encoding="utf-8") as f:
+                    f.write(char_map_string)
+
+                page += 1
+                page_char_y = 0
+        self.export_path=path
+
+
+    def decode_char(self,char):
+        result=[0 for _ in range(self.char_res[0]*self.char_res[1])]
+        pixels=base64.b64decode(self.chars[char].encode("ascii"))
+        pixel_index=0
+        for pixel in pixels:
+            if pixel_index>=len(result):
+                break
+            for x in range(8):
+                if pixel_index>=len(result):
+                    break
+                result[pixel_index]=(pixel>>(7-x))&1
+                pixel_index+=1
+        return result
+
     def does_char_exist(self,c):
         return chr(c) in self.chars