gfx/layers/genTables.py@97036ab72558 (annotated)
gfx/layers/genTables.py
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| 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"); |
