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Fix gamma/linear conversion of a RGB table 

Correcting the order of stack operations to fetch RGB components from
the table and to put in conversion the results.

Before the fix these two calls produced different results:
`lovr.math.gammaToLinear(  0.1, 0.2, 0.3  )`
`lovr.math.gammaToLinear( {0.1, 0.2, 0.3} )`
This commit is contained in:
Josip Miskovic 2022-01-15 09:42:22 +01:00 committed by Bjorn
parent 3ff64fa3ef
commit 110333fce7
1 changed files with 6 additions and 4 deletions
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10
src/api/l_math.c
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@ -192,9 +192,10 @@ static int l_lovrMathGammaToLinear(lua_State* L) {
if (lua_istable(L, 1)) {
for (int i = 0; i < 3; i++) {
lua_rawgeti(L, 1, i + 1);
lua_pushnumber(L, lovrMathGammaToLinear(luax_checkfloat(L, -1)));
float component = luax_checkfloat(L, -1);
lua_pop(L, 1);
lua_pushnumber(L, lovrMathGammaToLinear(component));
}
lua_pop(L, 3);
return 3;
} else {
int n = CLAMP(lua_gettop(L), 1, 3);
@ -209,9 +210,10 @@ static int l_lovrMathLinearToGamma(lua_State* L) {
if (lua_istable(L, 1)) {
for (int i = 0; i < 3; i++) {
lua_rawgeti(L, 1, i + 1);
lua_pushnumber(L, lovrMathLinearToGamma(luax_checkfloat(L, -1)));
float component = luax_checkfloat(L, -1);
lua_pop(L, 1);
lua_pushnumber(L, lovrMathLinearToGamma(component));
}
lua_pop(L, 3);
return 3;
} else {
int n = CLAMP(lua_gettop(L), 1, 3);