add support for color variants

README.md

@@ -9,10 +9,14 @@ How to use:
 
 shirtfile:
 ```
+# define variants to be generated
+variants: _black:0:0:0 _white:255:255:255 _red:255:0:0
+
+# declare lines
 m:b:fill FIRST
 m:r:fill second line
 r:r:400 third line
 ```
 
-output:
-![three lines of text, the first one is really big and says "first", the second line is smaller and says "second line" a third, even smaller line says "third line"](example.png)
+output (red variant):
+![three lines of text, the first one is really big and says "first", the second line is smaller and says "second line" a third, even smaller line says "third line"](example_red.png)

example.shirt

@@ -1,3 +1,7 @@
+# define variants to be generated
+variants: _black:0:0:0 _white:255:255:255 _red:255:0:0
+
+# declare lines
 m:b:fill FIRST
 m:r:fill second line
 r:r:400 third line

gen.py

@@ -7,6 +7,9 @@ fonts = {
     "b": "fonts/F25_Bank_Printer_Bold.ttf",
 }
 
+# image size is defined as 5000 x 5000 pixels
+size = (5000, 5000)
+
 if len(sys.argv) == 1:
     print("please specify a path to a shirtfile")
     exit(1)
@@ -14,7 +17,16 @@ if len(sys.argv) == 1:
 # parse shirtfile into list of tuples
 #
 # shirtfile syntax:
-#   a shirtfile is a plain-text file made up of lines in the following format
+#   a shirtfile is a plain-text file made up of the following compontents
+#
+#   different text color variants are defined on a line as follows
+#     variants: [{file_suffix}:{r}:{g}:{b}] ...
+#   where:
+#     - file_suffix is the suffix to be added to a file of this variant, can be left empty
+#     - r, g and b are the red, green and blue color components respecively (0-255)
+#   if no variants are specified white text will be output to a file with no suffix
+#
+#   lines of text are defined as lines in the following format
 #     {alignment}:{font}:{size} {text}
 #   where:
 #     - alignment can be:
@@ -27,8 +39,10 @@ if len(sys.argv) == 1:
 #     - size is either 'fill' to automatically calculate a font size to fill the width of the canvas
 #       or a font size in pixels
 #     - text is your desired line of text (with no line breaks)
+#
 #   the shirtfile parser treats lines starting with # as comments and ignores empty lines
 #
+variants = []
 texts = []
 with open(sys.argv[1], "r") as f:
     lines = f.readlines()
@@ -38,11 +52,25 @@ with open(sys.argv[1], "r") as f:
         if line.startswith("#") or len(line.strip()) == 0:
             continue
 
+        # parse variants
+        if line.startswith("variants:"):
+            if len(variants) > 0:
+                print("variants block can only appear once")
+                exit(1)
+            parts = line.strip().removeprefix("variants: ").split(" ")
+            for variant in parts:
+                subparts = variant.split(":")
+                variants.append(
+                    (subparts[0], (int(subparts[1]), int(subparts[2]), int(subparts[3]))))
+            continue
+
+        # parse lines
         parts = line.strip().split(" ", 1)
         texts.append(tuple(parts[0].split(":")) + (parts[1],))
 
-# create transparent 5000x5000 image
-im = Image.new("RGBA", (5000, 5000), (0, 0, 0, 0))
+# default to white output with no filename suffix
+if len(variants) == 0:
+    variants.append(("", (255, 255, 255)))
 
 # quick maths
 # calculate appropriate text sizes and bounding box sizes for positioning later
@@ -57,7 +85,7 @@ for text in texts:
     if text[2] == "fill":
         # dynamic font size calc is hell
         # reload font at increasing size until we fill out the whole canvas width
-        while bbox_size[0] < (im.size[0] - 5):
+        while bbox_size[0] < (size[0] - 5):
             font = ImageFont.truetype(font_path, font_size)
             bbox = font.getbbox(text[3], anchor=f"{text[0]}b")
             bbox_size = (bbox[2] - bbox[0], bbox[3] - bbox[1])
@@ -77,10 +105,16 @@ for text in texts:
 # account for padding
 total_height += (len(texts) - 1) * 20
 
-# draw the text
-draw = ImageDraw.Draw(im)
-y_offset = 0
-for text in p_texts:
+p_variants = []
+
+for variant in variants:
+    # create transparent image
+    im = Image.new("RGBA", size, (0, 0, 0, 0))
+
+    # draw the text
+    draw = ImageDraw.Draw(im)
+    y_offset = 0
+    for text in p_texts:
         # set x location dependent on alignment
         loc_x = 0
         if text[0] == "m":
@@ -92,12 +126,13 @@ for text in p_texts:
         # center all text together in the center of the canvas
         loc_y = (im.size[1]/2 + total_height / 2) + text[5][1] + y_offset
 
-    draw.text((loc_x, loc_y), text[3], font=text[4], anchor=f"{text[0]}b")
+        draw.text((loc_x, loc_y), text[3], font=text[4],
+                  anchor=f"{text[0]}b", fill=variant[1])
 
         # add height of this line to offset
         y_offset += text[5][1] + 20
 
-# crop to content and save
-im = im.crop(im.getbbox())
-filename = sys.argv[1].removesuffix(".shirt")
-im.save(f"{filename}.png", 'PNG')
+    # crop to content and save
+    im = im.crop(im.getbbox())
+    filename = sys.argv[1].removesuffix(".shirt")
+    im.save(f"{filename}{variant[0]}.png", 'PNG')