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feat(tools): support odd-wide greyscale icon conversion

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This commit is contained in:
tychovrahe 2024-08-23 17:54:56 +02:00 committed by TychoVrahe
parent 41273a25ed
commit 954c7f422b
1 changed files with 63 additions and 28 deletions
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91
python/src/trezorlib/toif.py
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@ -88,31 +88,60 @@ def _to_rgb(data: bytes, little_endian: bool) -> bytes:
return bytes(res) return bytes(res)
def _from_pil_grayscale(pixels: Sequence[int], right_hi: bool) -> bytes: def _from_pil_grayscale(
pixels: Sequence[int], right_hi: bool, width: int, height: int
) -> bytes:
data = bytearray() data = bytearray()
for i in range(0, len(pixels), 2):
left, right = pixels[i], pixels[i + 1] for y in range(0, height):
if right_hi: for x in range(0, width & (width - 1), 2):
c = (right & 0xF0) | ((left & 0xF0) >> 4) i = y * width + x
else:
c = (left & 0xF0) | ((right & 0xF0) >> 4) left, right = pixels[i], pixels[i + 1]
data += struct.pack(">B", c) if right_hi:
c = (right & 0xF0) | ((left & 0xF0) >> 4)
else:
c = (left & 0xF0) | ((right & 0xF0) >> 4)
data += struct.pack(">B", c)
if width % 2:
i = y * width + width - 1
left, right = pixels[i], 0
if right_hi:
c = (right & 0xF0) | ((left & 0xF0) >> 4)
else:
c = (left & 0xF0) | ((right & 0xF0) >> 4)
data += struct.pack(">B", c)
return bytes(data) return bytes(data)
def _from_pil_grayscale_alpha( def _from_pil_grayscale_alpha(
pixels: Sequence[Tuple[int, int]], right_hi: bool pixels: Sequence[Tuple[int, int]], right_hi: bool, width: int, height: int
) -> bytes: ) -> bytes:
data = bytearray() data = bytearray()
for i in range(0, len(pixels), 2): for y in range(0, height):
left_w_alpha, right_w_alpha = pixels[i], pixels[i + 1] for x in range(0, width & (width - 1), 2):
left = int((left_w_alpha[0] * left_w_alpha[1]) / 255) i = y * width + x
right = int((right_w_alpha[0] * right_w_alpha[1]) / 255) left_w_alpha, right_w_alpha = pixels[i], pixels[i + 1]
if right_hi: left = int((left_w_alpha[0] * left_w_alpha[1]) / 255)
c = (right & 0xF0) | ((left & 0xF0) >> 4) right = int((right_w_alpha[0] * right_w_alpha[1]) / 255)
else: if right_hi:
c = (left & 0xF0) | ((right & 0xF0) >> 4) c = (right & 0xF0) | ((left & 0xF0) >> 4)
data += struct.pack(">B", c) else:
c = (left & 0xF0) | ((right & 0xF0) >> 4)
data += struct.pack(">B", c)
if width % 2:
i = y * width + width - 1
left_w_alpha, right_w_alpha = pixels[i], (0, 255)
left = int((left_w_alpha[0] * left_w_alpha[1]) / 255)
right = int((right_w_alpha[0] * right_w_alpha[1]) / 255)
if right_hi:
c = (right & 0xF0) | ((left & 0xF0) >> 4)
else:
c = (left & 0xF0) | ((right & 0xF0) >> 4)
data += struct.pack(">B", c)
return bytes(data) return bytes(data)
@ -139,7 +168,10 @@ class Toif:
# checking the data size # checking the data size
width, height = self.size width, height = self.size
if self.mode is ToifMode.grayscale or self.mode is ToifMode.grayscale_eh: if self.mode is ToifMode.grayscale or self.mode is ToifMode.grayscale_eh:
expected_size = width * height // 2 if width % 2:
expected_size = (width + 1) * height // 2
else:
expected_size = width * height // 2
else: else:
expected_size = width * height * 2 expected_size = width * height * 2
uncompressed = _decompress(self.data) uncompressed = _decompress(self.data)
@ -215,24 +247,27 @@ def from_image(
image = image.convert("L") image = image.convert("L")
if image.mode == "L": if image.mode == "L":
# if image.size[0] % 2 != 0:
# raise ValueError("Only even-width grayscale images are supported")
if not legacy_format: if not legacy_format:
toif_mode = ToifMode.grayscale_eh toif_mode = ToifMode.grayscale_eh
toif_data = _from_pil_grayscale(image.getdata(), right_hi=True) toif_data = _from_pil_grayscale(
image.getdata(), right_hi=True, width=image.width, height=image.height
)
else: else:
toif_mode = ToifMode.grayscale toif_mode = ToifMode.grayscale
toif_data = _from_pil_grayscale(image.getdata(), right_hi=False) toif_data = _from_pil_grayscale(
image.getdata(), right_hi=False, width=image.width, height=image.height
)
elif image.mode == "LA": elif image.mode == "LA":
toif_mode = ToifMode.grayscale
if image.size[0] % 2 != 0:
raise ValueError("Only even-width grayscale images are supported")
if not legacy_format: if not legacy_format:
toif_mode = ToifMode.grayscale_eh toif_mode = ToifMode.grayscale_eh
toif_data = _from_pil_grayscale_alpha(image.getdata(), right_hi=True) toif_data = _from_pil_grayscale_alpha(
image.getdata(), right_hi=True, width=image.width, height=image.height
)
else: else:
toif_mode = ToifMode.grayscale toif_mode = ToifMode.grayscale
toif_data = _from_pil_grayscale_alpha(image.getdata(), right_hi=False) toif_data = _from_pil_grayscale_alpha(
image.getdata(), right_hi=False, width=image.width, height=image.height
)
elif image.mode == "RGB": elif image.mode == "RGB":
if not legacy_format: if not legacy_format:
toif_mode = ToifMode.full_color_le toif_mode = ToifMode.full_color_le