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feat(sw_blend) : add argb8888-premultiplied support (#7979)

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Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
This commit is contained in:
Felix Biego
2025-04-10 15:40:04 +03:00
committed by GitHub
parent cfb3a675d9
commit 48c7691c4b
208 changed files with 1614 additions and 8 deletions
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scripts/LVGLImage.py
+26 -5
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@@ -121,6 +121,7 @@ class ColorFormat(Enum):
ARGB8565 = 0x13
RGB565A8 = 0x14
RGB888 = 0x0F
ARGB8888_PREMULTIPLIED = 0x1A
@property
def bpp(self) -> int:
@@ -143,6 +144,7 @@ class ColorFormat(Enum):
ColorFormat.RGB565A8: 16, # 16bpp + a8 map
ColorFormat.ARGB8565: 24,
ColorFormat.RGB888: 24,
ColorFormat.ARGB8888_PREMULTIPLIED: 32,
}
return cf_map[self] if self in cf_map else 0
@@ -179,13 +181,15 @@ class ColorFormat(Enum):
ColorFormat.ARGB8888,
ColorFormat.XRGB8888, # const alpha: 0xff
ColorFormat.ARGB8565,
ColorFormat.RGB565A8)
ColorFormat.RGB565A8,
ColorFormat.ARGB8888_PREMULTIPLIED)
@property
def is_colormap(self) -> bool:
return self in (ColorFormat.ARGB8888, ColorFormat.RGB888,
ColorFormat.XRGB8888, ColorFormat.RGB565A8,
ColorFormat.ARGB8565, ColorFormat.RGB565)
ColorFormat.ARGB8565, ColorFormat.RGB565,
ColorFormat.ARGB8888_PREMULTIPLIED)
@property
def is_luma_only(self) -> bool:
@@ -295,8 +299,15 @@ def unpack_colors(data: bytes, cf: ColorFormat, w) -> List:
G = data[1::4]
R = data[2::4]
A = data[3::4]
for r, g, b, a in zip(R, G, B, A):
ret += [r, g, b, a]
if cf == ColorFormat.ARGB8888_PREMULTIPLIED:
for r, g, b, a in zip(R, G, B, A):
r = (r * a // 255)
g = (g * a // 255)
b = (b * a // 255)
ret += [r, g, b, a]
else:
for r, g, b, a in zip(R, G, B, A):
ret += [r, g, b, a]
else:
assert 0
@@ -988,6 +999,16 @@ class LVGLImage:
def pack(r, g, b, a):
return uint32_t((a << 24) | (r << 16) | (g << 8) | (b << 0))
elif cf == ColorFormat.ARGB8888_PREMULTIPLIED:
def pack(r, g, b, a):
# Premultiply RGB by Alpha
r = (r * a // 255)
g = (g * a // 255)
b = (b * a // 255)
# Pack into ARGB8888 format
return uint32_t((a << 24) | (r << 16) | (g << 8) | (b << 0))
elif cf == ColorFormat.XRGB8888:
def pack(r, g, b, a):
@@ -1343,7 +1364,7 @@ def main():
choices=[
"L8", "I1", "I2", "I4", "I8", "A1", "A2", "A4", "A8", "ARGB8888",
"XRGB8888", "RGB565", "RGB565A8", "ARGB8565", "RGB888", "AUTO",
"RAW", "RAW_ALPHA"
"RAW", "RAW_ALPHA", "ARGB8888_PREMULTIPLIED"
])
parser.add_argument('--rgb565dither', action='store_true',