Lua:
script_name("Change Chat Pos")
script_author("seven")
local ffi = require("ffi")
ffi.cdef [[
int VirtualProtect(void* lpAddress, unsigned long dwSize, unsigned long flNewProtect, unsigned long* lpflOldProtect);
]]
local hook = {hooks = {}}
addEventHandler('onScriptTerminate', function(scr)
if scr == script.this then
for i, hook in ipairs(hook.hooks) do
if hook.status then
hook.stop()
end
end
end
end)
function hook.new(cast, callback, hook_addr, size)
local size = size or 5
local new_hook = {}
local detour_addr = tonumber(ffi.cast('intptr_t', ffi.cast('void*', ffi.cast(cast, callback))))
local void_addr = ffi.cast('void*', hook_addr)
local old_prot = ffi.new('unsigned long[1]')
local org_bytes = ffi.new('uint8_t[?]', size)
ffi.copy(org_bytes, void_addr, size)
local hook_bytes = ffi.new('uint8_t[?]', size, 0x90)
hook_bytes[0] = 0xE9
ffi.cast('uint32_t*', hook_bytes + 1)[0] = detour_addr - hook_addr - 5
new_hook.call = ffi.cast(cast, hook_addr)
new_hook.status = false
local function set_status(bool)
new_hook.status = bool
ffi.C.VirtualProtect(void_addr, size, 0x40, old_prot)
ffi.copy(void_addr, bool and hook_bytes or org_bytes, size)
ffi.C.VirtualProtect(void_addr, size, old_prot[0], old_prot)
end
new_hook.stop = function() set_status(false) end
new_hook.start = function() set_status(true) end
new_hook.start()
table.insert(hook.hooks, new_hook)
return setmetatable(new_hook, {
__call = function(self, ...)
self.stop()
local res = self.call(...)
self.start()
return res
end
})
end
function main()
h = hook.new('void(__thiscall *)(void *, const char*, int, int, int, int, uint32_t)', chatHook, getModuleHandle('samp.dll') + 0x638A0) -- CChat::RenderEntry
end
function chatHook(this, text, x1, y1, x2, y2, color)
h(this, text, x1 + 100, y1 + 100, x2, y2, color) -- change X1 and Y1
end
