forked from minhngoc25a/freetype2
Some explanations, taken from an email sent by George.
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ftrandom
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--------
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This program expects a set of directories containing good fonts, and a set
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of extensions of fonts to be tested. It will randomly pick a font, copy it,
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introduce and error and then test it.
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The FreeType tests are quite basic:
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For each erroneous font it
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forks off a new tester;
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initializes the library;
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opens each font in the file;
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loads each glyph;
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(optionally reviewing the contours of the glyph)
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(optionally rasterizing)
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closes the face.
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If the tester exits with a signal, or takes longer than 20 seconds then
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ftrandom saves the erroneous font and continues. If the tester exits
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normally or with an error, then the superstructure removes the test font and
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continues.
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Arguments are:
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--all Test every font in the directory(ies) no matter
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what its extension (some CID-keyed fonts have no
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extension).
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--check-outlines Call FT_Outline_Decompose on each glyph.
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--dir <dir> Append <dir> to the list of directories to search
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for good fonts.
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--error-count <cnt> Introduce <cnt> single-byte errors into the
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erroneous fonts.
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--error-fraction <frac> Multiply the file size of the font by <frac> and
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introduce that many errors into the erroneous
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font file.
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--ext <ext> Add <ext> to the set of font types tested. Known
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extensions are `ttf', `otf', `ttc', `cid', `pfb',
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`pfa', `bdf', `pcf', `pfr', `fon', `otb', and
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`cff'.
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--help Print out this list of options.
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--nohints Specify FT_LOAD_NO_HINTING when loading glyphs.
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--rasterize Call FT_Render_Glyph as well as loading it.
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--result <dir> This is the directory in which test files are
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placed.
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--test <file> Run a single test on a pre-generated testcase.
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Done in the current process so it can be debugged
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more easily.
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