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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)
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()
for i in range(0, len(pixels), 2):
left, right = pixels[i], pixels[i + 1]
if right_hi:
c = (right & 0xF0) | ((left & 0xF0) >> 4)
else:
c = (left & 0xF0) | ((right & 0xF0) >> 4)
data += struct.pack(">B", c)
for y in range(0, height):
for x in range(0, width & (width - 1), 2):
i = y * width + x
left, right = pixels[i], pixels[i + 1]
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)
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:
data = bytearray()
for i in range(0, len(pixels), 2):
left_w_alpha, right_w_alpha = pixels[i], pixels[i + 1]
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)
for y in range(0, height):
for x in range(0, width & (width - 1), 2):
i = y * width + x
left_w_alpha, right_w_alpha = pixels[i], pixels[i + 1]
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)
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)
@ -139,7 +168,10 @@ class Toif:
# checking the data size
width, height = self.size
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:
expected_size = width * height * 2
uncompressed = _decompress(self.data)
@ -215,24 +247,27 @@ def from_image(
image = image.convert("L")
if image.mode == "L":
# if image.size[0] % 2 != 0:
# raise ValueError("Only even-width grayscale images are supported")
if not legacy_format:
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:
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":
toif_mode = ToifMode.grayscale
if image.size[0] % 2 != 0:
raise ValueError("Only even-width grayscale images are supported")
if not legacy_format:
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:
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":
if not legacy_format:
toif_mode = ToifMode.full_color_le