70 lines
2.2 KiB
Plaintext
70 lines
2.2 KiB
Plaintext
""" Pasted from cursor chat to be able to use bdf fonts easier in the future """
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""" Font Loading """
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import freetype
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face = freetype.Face("path/to/font.bdf")
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""" rendering the character """
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# Load the character
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face.load_char(char)
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# Get the bitmap data
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bitmap = face.glyph.bitmap
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# The bitmap data is stored in a packed format where:
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# - Each byte represents 8 pixels
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# - bitmap.pitch is the number of bytes per row
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# - bitmap.width is the width in pixels
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# - bitmap.rows is the height in pixels
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" Drawing the character "
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#For each row in the bitmap
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for i in range(bitmap.rows):
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# For each pixel in the row
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for j in range(bitmap.width):
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# Calculate which byte contains this pixel
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byte_index = i * bitmap.pitch + (j // 8)
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# Get the byte
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byte = bitmap.buffer[byte_index]
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# Check if the specific bit is set (1 = draw pixel)
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if byte & (1 << (7 - (j % 8))):
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# Draw the pixel at (x + j, y + i)
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draw.point((x + j, y + i), fill=(255, 255, 255))
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" Character Spacing "
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# Move to next character position using the font's advance
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x += face.glyph.advance.x >> 6 # Advance is in 1/64th of pixels
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""" Key Points:
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BDF fonts are bitmap fonts, so they have a fixed size
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The bitmap data is stored in a packed format (8 pixels per byte)
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Each bit in a byte represents whether a pixel should be drawn (1) or not (0)
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The pitch value tells you how many bytes are in each row
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The advance value tells you how far to move for the next character
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Example Usage: """
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def draw_bdf_text(draw, text, x, y, font_path):
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face = freetype.Face(font_path)
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for char in text:
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face.load_char(char)
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bitmap = face.glyph.bitmap
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# Draw the character
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for i in range(bitmap.rows):
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for j in range(bitmap.width):
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byte_index = i * bitmap.pitch + (j // 8)
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if byte_index < len(bitmap.buffer):
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byte = bitmap.buffer[byte_index]
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if byte & (1 << (7 - (j % 8))):
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draw.point((x + j, y + i), fill=(255, 255, 255))
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# Move to next character
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x += face.glyph.advance.x >> 6 |