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Use lightuserdata instead of Lua numbers (doubles) to represent touch IDs.

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--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2015-02-17 22:46:20 -04:00
parent 77d90e2260
commit 5652475dd2
3 changed files with 17 additions and 6 deletions
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src/modules/event/sdl/Event.cpp
+6 -1
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@@ -302,7 +302,12 @@ Message *Event::convert(const SDL_Event &e) const
if (touchmodule)
touchmodule->onEvent(e.type, touchinfo);
vargs.push_back(new Variant((double) touchinfo.id));
// This is a bit hackish and we lose the higher 32 bits of the id on
// 32-bit systems, but SDL only ever gives id's that at most use as many
// bits as can fit in a pointer (for now.)
// We use lightuserdata instead of a lua_Number (double) because doubles
// can't represent all possible id values on 64-bit systems.
vargs.push_back(new Variant((void *) (intptr_t) touchinfo.id));
vargs.push_back(new Variant(touchinfo.x));
vargs.push_back(new Variant(touchinfo.y));
vargs.push_back(new Variant(touchinfo.dx));