gfx/layers/genTables.py@b8a032363ba2 (annotated)
gfx/layers/genTables.py
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | #!/usr/bin/python |
| michael@0 | 2 | |
| michael@0 | 3 | def table_generator(f): |
| michael@0 | 4 | return ",\n".join([", ".join(["0x%2.2x" % h for h in [f(i) for i in range(r,r+16)]]) for r in range(0, 65536, 16)]) |
| michael@0 | 5 | |
| michael@0 | 6 | with open("PremultiplyTables.h", "w") as f: |
| michael@0 | 7 | f.write("const uint8_t PremultiplyTable[256*256] = {\n"); |
| michael@0 | 8 | f.write(table_generator(lambda i: ((i / 256) * (i % 256) + 254) / 255) + "\n") |
| michael@0 | 9 | f.write("};\n"); |
| michael@0 | 10 | f.write("const uint8_t UnpremultiplyTable[256*256] = {\n"); |
| michael@0 | 11 | f.write(table_generator(lambda i: (i % 256) * 255 / ((i / 256) if (i / 256) > 0 else 255) % 256) + "\n") |
| michael@0 | 12 | f.write("};\n"); |
