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baseline math

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Chuck
2025-07-23 13:12:17 -05:00
parent 9a86a9fe85
commit 85613aac00
1 changed files with 8 additions and 5 deletions
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13
src/of_the_day_manager.py
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@@ -41,6 +41,10 @@ class OfTheDayManager:
font_dir = os.path.join(os.path.dirname(__file__), '..', 'assets', 'fonts') font_dir = os.path.join(os.path.dirname(__file__), '..', 'assets', 'fonts')
self.title_font = freetype.Face(os.path.join(font_dir, 'MatrixChunky8X.bdf')) self.title_font = freetype.Face(os.path.join(font_dir, 'MatrixChunky8X.bdf'))
self.body_font = freetype.Face(os.path.join(font_dir, 'MatrixLight6X.bdf')) self.body_font = freetype.Face(os.path.join(font_dir, 'MatrixLight6X.bdf'))
# Log font properties for debugging
logger.debug(f"Title font properties: height={self.title_font.size.height}, ascender={self.title_font.size.ascender}, descender={self.title_font.size.descender}")
logger.debug(f"Body font properties: height={self.body_font.size.height}, ascender={self.body_font.size.ascender}, descender={self.body_font.size.descender}")
# Load categories and their data # Load categories and their data
self.categories = self.of_the_day_config.get('categories', {}) self.categories = self.of_the_day_config.get('categories', {})
@@ -171,11 +175,10 @@ class OfTheDayManager:
for char in text: for char in text:
face.load_char(char) face.load_char(char)
bitmap = face.glyph.bitmap bitmap = face.glyph.bitmap
# Calculate baseline position # For LED matrix displays, we need pixel-perfect baseline rendering
# For BDF fonts, we need to account for the font's baseline # Use the glyph's bitmap_top to position relative to the baseline
# bitmap_top is relative to the baseline, so we need to adjust # This ensures all characters align properly regardless of their height
baseline_y = y + face.size.ascender glyph_y = y + face.glyph.bitmap_top - bitmap.rows
glyph_y = baseline_y + face.glyph.bitmap_top - bitmap.rows
for i in range(bitmap.rows): for i in range(bitmap.rows):
for j in range(bitmap.width): for j in range(bitmap.width):
byte_index = i * bitmap.pitch + (j // 8) byte_index = i * bitmap.pitch + (j // 8)