From 110333fce73bf37170165627fa0b4d0eeeb48670 Mon Sep 17 00:00:00 2001
From: Josip Miskovic <josipmiskovic@gmail.com>
Date: Sat, 15 Jan 2022 09:42:22 +0100
Subject: [PATCH] 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} )`
---
 src/api/l_math.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/api/l_math.c b/src/api/l_math.c
index b46519fa..f118736f 100644
--- a/src/api/l_math.c
+++ b/src/api/l_math.c
@@ -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);