Use unsigned char for colors

lua_translate

@@ -5,6 +5,7 @@ typesIn = {
 	"char": "luaL_checkinteger",
 	"int": "luaL_checkinteger",
 	"long long": "luaL_checkinteger",
+	"unsigned char": "luaL_checkinteger",
 	"char *": "(char *)luaL_checkstring"
 }
 
@@ -13,6 +14,7 @@ typesOut = {
 	"char": "lua_pushinteger",
 	"int": "lua_pushinteger",
 	"long long": "lua_pushinteger",
+	"unsigned char": "lua_pushinteger",
 	"char *": "lua_pushstring"
 }
 

src/engine.c

@@ -16,7 +16,7 @@ void engine_memory_free(void * pnt) {
 struct ENGINE_TEXTURE { int width; int height; struct ENGINE_FRONTEND_TEXTURE * fe_texture; };
 
 // COLOR
-struct ENGINE_COLOR { char r; char g; char b; char a; };
+struct ENGINE_COLOR { unsigned char r; unsigned char g; unsigned char b; unsigned char a; };
 
 // WINDOWS
 struct ENGINE_WINDOW { struct ENGINE_TEXTURE * texture; struct ENGINE_FRONTEND_WINDOW * fe_window; };

src/frontend/null/main.c

@@ -34,7 +34,7 @@ struct ENGINE_COLOR engine_texture_color_get(struct ENGINE_TEXTURE * engine_text
 }
 
 // COLOR
-void engine_color_set(char r,char g,char b,char a) {
+void engine_color_set(unsigned char r,unsigned char g,unsigned char b,unsigned char a) {
 }
 
 // RENDERTARGET

src/helpers.c

@@ -38,7 +38,7 @@ void engine_rendertarget_draw_texture(struct ENGINE_TEXTURE * texture,int x,int
 }
 
 void engine_rendertarget_draw_file(char * fpath) {
-	char buffer[engine_rendertarget->width * engine_rendertarget->height * 4];
+	unsigned char buffer[engine_rendertarget->width * engine_rendertarget->height * 4];
 	FILE * f = fopen(fpath,"r");
 	fgets(buffer,engine_rendertarget->width * engine_rendertarget->height * 4,f);
 	fclose(f);

src/lua.c

@@ -37,10 +37,10 @@ int engine_luaf_texture_destroy(lua_State *L) {
 }
 
 int engine_luaf_color_set(lua_State *L) {
-	char r = luaL_checkinteger(L,1);
-	char g = luaL_checkinteger(L,2);
-	char b = luaL_checkinteger(L,3);
-	char a = luaL_checkinteger(L,4);
+	unsigned char r = luaL_checkinteger(L,1);
+	unsigned char g = luaL_checkinteger(L,2);
+	unsigned char b = luaL_checkinteger(L,3);
+	unsigned char a = luaL_checkinteger(L,4);
 	engine_color_set(r,g,b,a);
 	return 0;
 }

src/values/functions.toml

@@ -48,7 +48,7 @@ description = "Free a texture from memory."
 # COLOR
 [engine_color_set]
 type = "void"
-arguments =   ["char","char","char","char"]
+arguments =   ["unsigned char","unsigned char","unsigned char","unsigned char"]
 argNames =    ["r",            "g",            "b",            "a"]
 description = "Set the color that points (pixels) should be drawn in."