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68 lines
1.7 KiB
ReStructuredText
68 lines
1.7 KiB
ReStructuredText
5.4.0
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-----
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API Changes
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===========
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APNG extension to PNG plugin
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Animated Portable Network Graphics (APNG) images are not fully supported but
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can be opened via the PNG plugin to get some basic info::
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im = Image.open("image.apng")
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print(im.mode) # "RGBA"
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print(im.size) # (245, 245)
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im.show() # Shows a single frame
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Check for libjpeg-turbo
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^^^^^^^^^^^^^^^^^^^^^^^
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You can check if Pillow has been built against the libjpeg-turbo version of the
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libjpeg library::
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from PIL import features
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features.check_feature("libjpeg_turbo") # True or False
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Negative indexes in pixel access
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When accessing individual image pixels, negative indexes are now also accepted.
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For example, to get or set the farthest pixel in the lower right of an image::
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px = im.load()
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print(px[-1, -1])
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px[-1, -1] = (0, 0, 0)
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New custom TIFF tags
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^^^^^^^^^^^^^^^^^^^^
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TIFF images can now be saved with custom integer, float and string TIFF tags::
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im = Image.new("RGB", (200, 100))
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custom = {
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37000: 4,
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37001: 4.2,
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37002: "custom tag value",
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37003: u"custom tag value",
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37004: b"custom tag value",
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}
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im.save("output.tif", tiffinfo=custom)
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im2 = Image.open("output.tif")
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print(im2.tag_v2[37000]) # 4
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print(im2.tag_v2[37002]) # "custom tag value"
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print(im2.tag_v2[37004]) # b"custom tag value"
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Other Changes
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=============
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ImageOps.fit
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^^^^^^^^^^^^
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Now uses one resize operation with ``box`` parameter internally
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instead of a crop and scale operations sequence.
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This improves the performance and accuracy of cropping since
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the ``box`` parameter accepts float values.
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