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fixed support for hopper.ras, and other RGB sun raster files

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This commit is contained in:
wiredfool 2016-11-19 19:43:43 -08:00
parent e43c91cf1c
commit 318ff7d332
2 changed files with 33 additions and 10 deletions
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37
PIL/SunImagePlugin.py
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@ -48,17 +48,20 @@ class SunImageFile(ImageFile.ImageFile):
self.size = i32(s[4:8]), i32(s[8:12])
depth = i32(s[12:16])
file_type = i32(s[20:24])
if depth == 1:
self.mode, rawmode = "1", "1;I"
elif depth == 8:
self.mode = rawmode = "L"
elif depth == 24:
self.mode, rawmode = "RGB", "BGR"
if file_type == 3:
self.mode, rawmode = "RGB", "RGB"
else:
self.mode, rawmode = "RGB", "BGR"
else:
raise SyntaxError("unsupported mode")
compression = i32(s[20:24])
if i32(s[24:28]) != 0:
length = i32(s[28:32])
offset = offset + length
@ -68,11 +71,31 @@ class SunImageFile(ImageFile.ImageFile):
stride = (((self.size[0] * depth + 7) // 8) + 3) & (~3)
if compression == 1:
self.tile = [("raw", (0, 0)+self.size, offset, (rawmode, stride))]
elif compression == 2:
self.tile = [("sun_rle", (0, 0)+self.size, offset, rawmode)]
# file type: Type is the version (or flavor) of the bitmap
# file. The following values are typically found in the Type
# field:
# 0000h Old
# 0001h Standard
# 0002h Byte-encoded
# 0003h RGB format
# 0004h TIFF format
# 0005h IFF format
# FFFFh Experimental
# Old and standard are the same, except for the length tag.
# byte-encoded is run-length-encoded
# RGB looks similar to standard, but RGB byte order
# TIFF and IFF mean that they were converted from T/IFF
# Experimental means that it's something else.
# (http://www.fileformat.info/format/sunraster/egff.htm)
if file_type in (0, 1, 3, 4, 5):
self.tile = [("raw", (0, 0)+self.size, offset, (rawmode, stride))]
elif file_type == 2:
self.tile = [("sun_rle", (0, 0)+self.size, offset, rawmode)]
else:
raise SyntaxError('Unsupported Sun Raster file type')
#
# registry

6
Tests/test_file_sun.py
View File

@ -1,4 +1,4 @@
from helper import unittest, PillowTestCase
from helper import unittest, PillowTestCase, hopper
from PIL import Image, SunImagePlugin
@ -16,12 +16,12 @@ class TestFileSun(PillowTestCase):
# Assert
self.assertEqual(im.size, (128, 128))
self.assert_image_similar(im, hopper(), 5) # visually verified
invalid_file = "Tests/images/flower.jpg"
self.assertRaises(SyntaxError,
lambda: SunImagePlugin.SunImageFile(invalid_file))
def test_im1(self):
im = Image.open('Tests/images/sunraster.im1')
target = Image.open('Tests/images/sunraster.im1.png')