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b272755e2d
This file is currently just a helper for doing PremultiplySurface in Moz2D. It corresponds to an existing Thebes one in the gfxUtils class. An upcoming patch will require this PremultiplySurface method. The existing one in gfxUtils has been renamed internally to DeprecatedPremultiplyTables.
13 lines
588 B
Python
13 lines
588 B
Python
#!/usr/bin/python
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def table_generator(f):
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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)])
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with open("DeprecatedPremultiplyTables.h", "w") as f:
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f.write("const uint8_t gfxUtils::sPremultiplyTable[256*256] = {\n");
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f.write(table_generator(lambda i: ((i / 256) * (i % 256) + 254) / 255) + "\n")
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f.write("};\n");
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f.write("const uint8_t gfxUtils::sUnpremultiplyTable[256*256] = {\n");
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f.write(table_generator(lambda i: (i % 256) * 255 / ((i / 256) if (i / 256) > 0 else 255) % 256) + "\n")
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f.write("};\n");
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