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fix: handle bitmap buffer safely and add debug logging

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ChuckBuilds
2025-04-22 20:29:20 -05:00
parent 72daa32316
commit 24e4ff7a6a
1 changed files with 11 additions and 2 deletions
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13
src/font_test_manager.py
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@@ -60,11 +60,20 @@ class FontTestManager:
self.face.load_char(char) self.face.load_char(char)
bitmap = self.face.glyph.bitmap bitmap = self.face.glyph.bitmap
# Log bitmap details for debugging
self.logger.debug(f"Bitmap for '{char}': width={bitmap.width}, rows={bitmap.rows}, pitch={bitmap.pitch}")
# Draw the glyph # Draw the glyph
for i in range(bitmap.rows): for i in range(bitmap.rows):
for j in range(bitmap.width): for j in range(bitmap.width):
if bitmap.buffer[i * bitmap.width + j]: try:
draw.point((x + j, y + i), fill=(255, 255, 255)) # Calculate the correct buffer index based on pitch
index = i * bitmap.pitch + j
if index < len(bitmap.buffer) and bitmap.buffer[index]:
draw.point((x + j, y + i), fill=(255, 255, 255))
except IndexError:
self.logger.warning(f"Index out of range for char '{char}' at position ({i}, {j})")
continue
# Move to next character position # Move to next character position
x += self.face.glyph.advance.x >> 6 x += self.face.glyph.advance.x >> 6