Add initial support for drawing symbols onto card frame.

yagicard/__init__.py

@@ -11,6 +11,7 @@ FRAMES_DIRECTORY = "frames"
 FONTS_DIRECTORIES = [".", "fonts", os.path.join(os.environ.get("HOME", ""), ".fonts")]
 
 IMAGES_DIRECTORY  = "images"
+SYMBOLS_DIRECTORY = "symbols"
 
 DEFAULT_TEXT_COLOR = "black"
 DEFAULT_FONT = "EBGaramond-Regular.ttf"
@@ -19,6 +20,33 @@ DEFAULT_FONT_SIZE = 12
 NAME_FONT = "Electrolize-Regular.ttf"
 YAGICARDFILE = "Yagicardfile"
 
+base_directory = "."
+
+class Images ():
+    def __init__ (self, directory):
+        self.directory = directory
+        self.images = {}
+
+    def __getitem__ (self, key):
+        if key in self.images:
+            return self.images[key]
+
+        if os.path.splitext(key)[1] == "":
+            key = f"{key}.png"
+
+        if key in self.images:
+            return self.images[key]
+
+        image = Image.open(os.path.join(base_directory, self.directory, key))
+        self.images[key] = image
+        return image
+
+    def __setitem__ (self, key, value):
+        self.images[key] = value
+
+images  = Images(IMAGES_DIRECTORY)
+symbols = Images(SYMBOLS_DIRECTORY)
+
 class Field ():
     def __init__ (self, style_rules, value, card):
         self.style_rules = style_rules
@@ -47,7 +75,7 @@ def resolve_style_rule (rule, *args):
 def load_font (name, size):
     for directory in FONTS_DIRECTORIES:
         try:
-            return ImageFont.truetype(os.path.join(directory, name), size)
+            return ImageFont.truetype(os.path.join(base_directory, directory, name), size)
         except OSError: pass
     
     raise OSError("failed to open font: " + name)
@@ -61,16 +89,17 @@ def draw_text (image, draw, field):
     font_name   = field.get("typeface", DEFAULT_FONT)
     text_anchor = field.get("anchor", None)
     alignment   = field.get("align", "left")
+    direction   = field.get("direction", "ltr")
 
     font         = load_font(font_name, font_size)
     font_variant = field.get("font_variant")
     if font_variant:
         font.set_variation_by_name(font_variant)
 
-    draw.multiline_text((field.get("x"), field.get("y")), field.value, font=font, fill=color, anchor=text_anchor, align=alignment)    
+    draw.multiline_text((field.get("x"), field.get("y")), field.value, font=font, fill=color, anchor=text_anchor, align=alignment) #, direction=direction)    
 
 def draw_image (image, draw, field):
-    source_image = Image.open(os.path.join(IMAGES_DIRECTORY, field.value))
+    source_image = images[field.value]
 
     width  = field.get("width")
     height = field.get("height")
@@ -80,6 +109,30 @@ def draw_image (image, draw, field):
 
     image.paste(source_image, (field.get("x"), field.get("y")))
 
+def draw_symbols (image, draw, field):
+    symbol_text = field.value.lower()
+    if symbol_text.startswith("{") and symbol_text.endswith("}"):
+        symbol_text = symbol_text[1:-1].replace("}{", " ")
+
+    width     = field.get("width",  image.width)
+    height    = field.get("height", image.height)
+    direction = field.get("direction", "ltr")
+
+    symbols_image = Image.new(image.mode, (width, height))
+
+    symbol_pos = (0, 0)
+    for symbol_name in symbol_text.split(" "):
+        if symbol_name:
+            symbol = symbols[symbol_name]
+            symbols_image.paste(symbol, symbol_pos)
+            
+            if direction == "ltr":
+                symbol_pos = (symbol_pos[0] + symbol.width, symbol_pos[1])
+            elif direction == "ttb":
+                symbol_pos = (symbol_pos[0], symbol_pos[1] + symbol.height)
+
+    image.alpha_composite(symbols_image, (field.get("x"), field.get("y")))
+
 def rescale_text_for_sizes (*args):
     def scaler (value):
         for arg in args:
@@ -211,6 +264,7 @@ def main():
 
     yagicardfile = os.path.join(yagicard_root, YAGICARDFILE)
     with open(yagicardfile) as yagicardcode:
+        base_directory = yagicard_root
         namespace = {
             "YAGICARD_ROOT": yagicard_root
         }