image magic: add bmp and tiff + Readme
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README.md
18
README.md
@ -120,6 +120,24 @@ The following packages are optional:
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Python bindings of fontconfig are required for displaying
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genealogical symbols
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* **magic**
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Python magic bindings required to have better performances with image
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processing.
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If this module is not available, we continue to use Gdk.
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This avoid to load the image in memory. This is a real improvement
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when we have many big images.
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Used in odfdoc, rtfdoc and webreport and tested with png, gif, jpeg, bmp, tiff
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#
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# file size with magic without (Gdk) ratio
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# example 1 : 256k 0.00080 0.00575 7
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# example 2 : 21M 0.00171 0.55860 326
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Debian, Ubuntu, ... : python3-magic
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Fedora, Redhat, ... : python3-magic
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openSUSE : python-magic
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ArchLinux : python-magic
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Optional packages required by Third-party Addons
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------------------------------------------------
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@ -168,12 +168,18 @@ def image_size(source):
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# For performance reasons, we'll try to get image size from magic.
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# This avoid to load the image in memory. This is a real improvement
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# when we have many big images.
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# Used in odfdoc, rtfdoc and webreport and tested with png, gif, jpeg
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# Used in odfdoc, rtfdoc and webreport and tested with png, gif, jpeg,
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# bmp, tiff
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#
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# file size with magic without (Gdk) ratio
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# example 1 : 256k 0.00080 0.00575 7
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# example 2 : 21M 0.00171 0.55860 326
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img = magic.from_file(source)
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found = img.find("TIFF")
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if found == 0:
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width = re.search('width=(\d+)', img).groups()
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height = re.search('height=(\d+)', img).groups()
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return (int(width[0]), int(height[0]))
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found = img.find("precision")
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if found > 0:
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img = img[found:]
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