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Use binary to make comparing to the specification easier

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Andrew Murray 2025-06-11 18:59:34 +10:00
parent 8ca44425c8
commit dcf674a48f
1 changed files with 8 additions and 5 deletions
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13
src/PIL/QoiImagePlugin.py
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@ -139,7 +139,7 @@ class QoiEncoder(ImageFile.PyEncoder):
_previously_seen_pixels: dict[int, tuple[int, int, int, int]] = {}
def _write_run(self, run: int) -> bytes:
return o8(0xC0 | (run - 1)) # QOI_OP_RUN
return o8(0b11000000 | (run - 1)) # QOI_OP_RUN
def _delta(self, left: int, right: int) -> int:
result = (left - right) & 0xFF
@ -191,16 +191,19 @@ class QoiEncoder(ImageFile.PyEncoder):
if -2 <= dr < 2 and -2 <= dg < 2 and -2 <= db < 2:
data += o8(
0x40 | (dr + 2) << 4 | (dg + 2) << 2 | (db + 2)
0b01000000
| (dr + 2) << 4
| (dg + 2) << 2
| (db + 2)
) # QOI_OP_DIFF
elif -8 <= dgr < 8 and -32 <= dg < 32 and -8 <= dgb < 8:
data += o8(0x80 | (dg + 32)) # QOI_OP_LUMA
data += o8(0b10000000 | (dg + 32)) # QOI_OP_LUMA
data += o8((dgr + 8) << 4 | (dgb + 8))
else:
data += o8(0xFE) # QOI_OP_RGB
data += o8(0b11111110) # QOI_OP_RGB
data += bytes(pixel[:3])
else:
data += o8(0xFF) # QOI_OP_RGBA
data += o8(0b11111111) # QOI_OP_RGBA
data += bytes(pixel)
self._previous_pixel = pixel