Initial commit.

mods/firefly_font/fonts/change_atlas_cell_size.py

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+from PIL import Image
+
+def adjust_font_atlas(input_path, output_path, current_width, current_height, new_width, new_height):
+    """
+    Adjusts the cell dimensions of a pixel font atlas sprite sheet by creating larger cells
+    and placing the original sprites in the top-left corner of each new cell, filling
+    the extra space with the background color detected from the top-left pixel of the
+    original image. This allows for manual extension of sprites without repositioning them.
+
+    Args:
+        input_path (str): Path to the input atlas image.
+        output_path (str): Path to save the output atlas image.
+        current_width (int): Current width of each cell (in pixels).
+        current_height (int): Current height of each cell (in pixels).
+        new_width (int): New larger width for each cell (in pixels).
+        new_height (int): New larger height for each cell (in pixels).
+    """
+    if new_width < current_width or new_height < current_height:
+        raise ValueError("New dimensions must be larger than the current dimensions.")
+
+    img = Image.open(input_path)
+    width, height = img.size
+
+    if width % current_width != 0 or height % current_height != 0:
+        raise ValueError("Image dimensions are not multiples of the current cell dimensions.")
+
+    cols = width // current_width
+    rows = height // current_height
+
+    # Create a new image with the same mode
+    new_img = Image.new(img.mode, (cols * new_width, rows * new_height))
+
+    # Detect background color from top-left pixel (assuming it's background)
+    bg_color = img.getpixel((0, 0))
+
+    # Fill the new image with the background color
+    new_img.paste(bg_color, (0, 0, new_img.width, new_img.height))
+
+    # Copy each original sprite into the top-left of its new larger cell
+    for r in range(rows):
+        for c in range(cols):
+            # Crop the original sprite
+            left = c * current_width
+            top = r * current_height
+            right = left + current_width
+            bottom = top + current_height
+            sprite = img.crop((left, top, right, bottom))
+
+            # Paste into new position
+            new_left = c * new_width
+            new_top = r * new_height
+            new_img.paste(sprite, (new_left, new_top))
+
+    # Save the new atlas
+    new_img.save(output_path)
+
+
+# Example usage:
+base_path = "/Users/iboettcher/eclipse-workspace/firefly/mods/firefly_font/fonts/"
+adjust_font_atlas(f'{base_path}firefly_normal.png',
+                  f'{base_path}firefly_wide.png', 8, 17, 17, 17)

mods/firefly_font/fonts/firefly_normal.json

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+{
+    "A": {
+        "width": 7,
+        "height": 10,
+        "base": 0,
+        "advance": 2
+    },
+    "B": {
+        "width": 7,
+        "height": 10,
+        "base": 0,
+        "advance": 2
+    },
+    "C": {
+        "width": 7,
+        "height": 10,
+        "base": 0,
+        "advance": 2
+    }
+}

mods/firefly_font/init.lua

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+local ns = firefly
+local modname = minetest.get_current_modname()
+
+ns.fonts = {}
+
+function ns.rasterize(str, font, max_width)
+    if not font then font = "firefly_normal" end
+    local atlas = ns.fonts[font] or minetest.parse_json(ns.read_file(minetest.get_modpath(modname).."/fonts/"..font..".json"))
+    if not ns.fonts[font] then
+        ns.fonts[font] = atlas
+    end
+    
+    local newline = string.byte("\n", 1)
+    
+    local out = {}
+    local width = 0
+    local height = 0
+    local x = 0
+    local y = 0
+    for i = 0, #str do
+        local char = str:byte(i)
+        if not char then goto continue end
+        if char == newline then
+            goto continue
+        end
+        local glyph = atlas[string.char(char)]
+        
+        local num = #out
+        out[num +1] = ":"
+        out[num +2] = x
+        out[num +3] = ","
+        out[num +4] = y
+        out[num +5] = "="
+        out[num +6] = font
+        out[num +7] = "/firefly_char_"
+        out[num +8] = char
+        out[num +9] = ".png"
+        
+        x = x +glyph.width +glyph.advance
+        if x > width then
+            width = x
+        end
+        ::continue::
+    end
+    return "[combine:"..width.."x"..height..table.concat(out)
+end

mods/firefly_font/mod.conf

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+name = firefly_font
+depends = firefly_base