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add support for RGBaXX and RGBaX raw tiff modes

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This commit is contained in:
Alexander 2018-09-05 17:45:03 +03:00
parent ad5cf0a0e2
commit accc66fb5e
3 changed files with 56 additions and 2 deletions
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10
Tests/test_lib_pack.py
View File

@ -280,8 +280,14 @@ class TestLibUnpack(PillowTestCase):
self.assert_unpack("RGBA", "RGBa", 4,
(63, 127, 191, 4), (159, 191, 223, 8), (191, 212, 233, 12))
self.assert_unpack("RGBA", "RGBa",
b'\x01\x02\x03\x00\x10\x20\x30\xff',
(0, 0, 0, 0), (16, 32, 48, 255))
b'\x01\x02\x03\x00\x10\x20\x30\x7f\x10\x20\x30\xff',
(0, 0, 0, 0), (32, 64, 96, 127), (16, 32, 48, 255))
self.assert_unpack("RGBA", "RGBaX",
b'\x01\x02\x03\x00-\x10\x20\x30\x7f-\x10\x20\x30\xff-',
(0, 0, 0, 0), (32, 64, 96, 127), (16, 32, 48, 255))
self.assert_unpack("RGBA", "RGBaXX",
b'\x01\x02\x03\x00==\x10\x20\x30\x7f!!\x10\x20\x30\xff??',
(0, 0, 0, 0), (32, 64, 96, 127), (16, 32, 48, 255))
self.assert_unpack("RGBA", "RGBa;16L", 8,
(63, 127, 191, 8), (159, 191, 223, 16), (191, 212, 233, 24))
self.assert_unpack("RGBA", "RGBa;16L",

4
src/PIL/TiffImagePlugin.py
View File

@ -208,6 +208,10 @@ OPEN_INFO = {
(MM, 2, (1,), 1, (8, 8, 8, 8, 8, 8), (0, 0, 0)): ("RGBX", "RGBXXX"),
(II, 2, (1,), 1, (8, 8, 8, 8), (1,)): ("RGBA", "RGBa"),
(MM, 2, (1,), 1, (8, 8, 8, 8), (1,)): ("RGBA", "RGBa"),
(II, 2, (1,), 1, (8, 8, 8, 8, 8), (1, 0)): ("RGBA", "RGBaX"),
(MM, 2, (1,), 1, (8, 8, 8, 8, 8), (1, 0)): ("RGBA", "RGBaX"),
(II, 2, (1,), 1, (8, 8, 8, 8, 8, 8), (1, 0, 0)): ("RGBA", "RGBaXX"),
(MM, 2, (1,), 1, (8, 8, 8, 8, 8, 8), (1, 0, 0)): ("RGBA", "RGBaXX"),
(II, 2, (1,), 1, (8, 8, 8, 8), (2,)): ("RGBA", "RGBA"),
(MM, 2, (1,), 1, (8, 8, 8, 8), (2,)): ("RGBA", "RGBA"),
(II, 2, (1,), 1, (8, 8, 8, 8, 8), (2, 0)): ("RGBA", "RGBAX"),

44
src/libImaging/Unpack.c
View File

@ -797,6 +797,48 @@ unpackRGBa(UINT8* _out, const UINT8* in, int pixels)
}
}
static void
unpackRGBaskip1(UINT8* _out, const UINT8* in, int pixels)
{
int i;
UINT32* out = (UINT32*) _out;
/* premultiplied RGBA */
for (i = 0; i < pixels; i++) {
int a = in[3];
if ( ! a) {
out[i] = 0;
} else if (a == 255) {
out[i] = MAKE_UINT32(in[0], in[1], in[2], a);
} else {
out[i] = MAKE_UINT32(CLIP8(in[0] * 255 / a),
CLIP8(in[1] * 255 / a),
CLIP8(in[2] * 255 / a), a);
}
in += 5;
}
}
static void
unpackRGBaskip2(UINT8* _out, const UINT8* in, int pixels)
{
int i;
UINT32* out = (UINT32*) _out;
/* premultiplied RGBA */
for (i = 0; i < pixels; i++) {
int a = in[3];
if ( ! a) {
out[i] = 0;
} else if (a == 255) {
out[i] = MAKE_UINT32(in[0], in[1], in[2], a);
} else {
out[i] = MAKE_UINT32(CLIP8(in[0] * 255 / a),
CLIP8(in[1] * 255 / a),
CLIP8(in[2] * 255 / a), a);
}
in += 6;
}
}
static void
unpackBGRa(UINT8* _out, const UINT8* in, int pixels)
{
@ -1304,6 +1346,8 @@ static struct {
{"RGBA", "RGBAX", 40, copy4skip1},
{"RGBA", "RGBAXX", 48, copy4skip2},
{"RGBA", "RGBa", 32, unpackRGBa},
{"RGBA", "RGBaX", 40, unpackRGBaskip1},
{"RGBA", "RGBaXX", 48, unpackRGBaskip2},
{"RGBA", "RGBa;16L", 64, unpackRGBa16L},
{"RGBA", "RGBa;16B", 64, unpackRGBa16B},
{"RGBA", "BGRa", 32, unpackBGRa},