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Changed the optional 'multiply alpha' boolean argument in love.graphics.setBlendMode to be an enum with constants 'alphamultiply' and 'premultiplied'.

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The default value for the second argument of setBlendMode is 'alphamultiply'.
This commit is contained in:
Alex Szpakowski
2015-12-16 14:53:16 -04:00
parent 39127cd1b2
commit 48345bd58c
5 changed files with 61 additions and 21 deletions
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src/modules/graphics/opengl/wrap_Graphics.cpp
+15 -6
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@@ -1042,25 +1042,34 @@ int w_setBlendMode(lua_State *L)
if (!Graphics::getConstant(str, mode))
return luaL_error(L, "Invalid blend mode: %s", str);
bool multiplyalpha = luax_optboolean(L, 2, true);
Graphics::BlendAlpha alphamode = Graphics::BLENDALPHA_MULTIPLY;
if (!lua_isnoneornil(L, 2))
{
const char *alphastr = luaL_checkstring(L, 2);
if (!Graphics::getConstant(alphastr, alphamode))
return luaL_error(L, "Invalid blend alpha mode: %s", alphastr);
}
luax_catchexcept(L, [&](){ instance()->setBlendMode(mode, multiplyalpha); });
luax_catchexcept(L, [&](){ instance()->setBlendMode(mode, alphamode); });
return 0;
}
int w_getBlendMode(lua_State *L)
{
const char *str;
Graphics::BlendMode mode;
bool multiplyalpha = false;
const char *alphastr;
luax_catchexcept(L, [&](){ mode = instance()->getBlendMode(multiplyalpha); });
Graphics::BlendAlpha alphamode;
Graphics::BlendMode mode = instance()->getBlendMode(alphamode);
if (!Graphics::getConstant(mode, str))
return luaL_error(L, "Unknown blend mode");
if (!Graphics::getConstant(alphamode, alphastr))
return luaL_error(L, "Unknown blend alpha mode");
lua_pushstring(L, str);
lua_pushboolean(L, multiplyalpha);
lua_pushstring(L, alphastr);
return 2;
}