static void copy_image(lua_State * L, lua_Number scale)
{
image *a, **aa, *b, **bb;
if (lua_gettop(L) != 1)
luaL_error(L, "img.copy() needs exactly 1 argument");
aa = (image **) luaL_checkudata(L, 1, TYPE_IMG); /* a */
lua_pop(L, 1); /* - */
a = *aa;
bb = (image **) lua_newuserdata(L, sizeof(image *)); /* b */
luaL_getmetatable(L, TYPE_IMG); /* m b */
lua_setmetatable(L, -2); /* b */
b = *bb = new_image();
if (!is_wd_running(a))
img_width(b) = do_zround(img_width(a) * scale);
if (!is_ht_running(a))
img_height(b) = do_zround(img_height(a) * scale);
if (!is_dp_running(a))
img_depth(b) = do_zround(img_depth(a) * scale);
img_transform(b) = img_transform(a);
img_dict(b) = img_dict(a);
if (img_dictref(a) != LUA_NOREF) {
lua_rawgeti(L, LUA_GLOBALSINDEX, img_dictref(a)); /* ad b */
img_dictref(b) = luaL_ref(L, LUA_GLOBALSINDEX); /* b */
} else
assert(img_state(img_dict(a)) >= DICT_REFERED);
}
static void copy_image(lua_State * L, lua_Number scale)
{
image *a, **aa, *b, **bb;
image_dict *d;
if (lua_gettop(L) == 0)
luaL_error(L, "img.copy needs an image as argument");
aa = (image **) luaL_checkudata(L, 1, TYPE_IMG); /* a */
lua_pop(L, 1); /* - */
a = *aa;
bb = (image **) lua_newuserdata(L, sizeof(image *)); /* b */
luaL_getmetatable(L, TYPE_IMG); /* m b */
lua_setmetatable(L, -2); /* b */
b = *bb = new_image();
if (!is_wd_running(a))
img_width(b) = do_zround(img_width(a) * scale);
if (!is_ht_running(a))
img_height(b) = do_zround(img_height(a) * scale);
if (!is_dp_running(a))
img_depth(b) = do_zround(img_depth(a) * scale);
img_transform(b) = img_transform(a);
img_dict(b) = img_dict(a);
if (img_dictref(a) != LUA_NOREF) {
lua_rawgeti(L, LUA_REGISTRYINDEX, img_dictref(a)); /* ad b */
img_dictref(b) = luaL_ref(L, LUA_REGISTRYINDEX); /* b */
d = img_dict(*aa);
img_luaref(d) += 1;
} else if (img_state(img_dict(a)) < DICT_REFERED) {
luaL_error(L, "img.copy needs an proper image as argument");
}
}
