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#include <stdlib.h>
#include "gl/glad/glad.h"
#include <GLFW/glfw3.h>
#include <lua.h>
#include <honeysuckle.h>
struct window_data {
lua_State *L;
int framebuffer_size_callback;
};
struct window_data * create_window_data(lua_State *L)
{
struct window_data *wdata = malloc(sizeof(struct window_data));
if (wdata == NULL)
return NULL;
wdata->L = L;
wdata->framebuffer_size_callback = LUA_NOREF;
return wdata;
}
int window_create(lua_State *L);
int window_destroy(lua_State *L);
int window_make_context_current(lua_State *L);
int window_set_hint(lua_State *L);
int window_should_close(lua_State *L);
int window_poll_events(lua_State *L);
int window_swap_buffers(lua_State *L);
int window_set_framebuffer_size_callback(lua_State *L);
int window_get_time(lua_State *L);
static const char *window_tname = "window";
void setup_window(lua_State *L, int honey_index)
{
luaL_newmetatable(L, window_tname);
lua_pop(L, 1);
int hint_types = hs_create_table(L,
hs_str_int("contextVersionMajor", GLFW_CONTEXT_VERSION_MAJOR),
hs_str_int("contextVersionMinor", GLFW_CONTEXT_VERSION_MINOR),
hs_str_int("openGlProfile", GLFW_OPENGL_PROFILE),
);
int profile_types = hs_create_table(L,
hs_str_int("openGlCoreProfile", GLFW_OPENGL_CORE_PROFILE),
);
hs_create_table(L,
hs_str_cfunc("create", window_create),
hs_str_cfunc("destroy", window_destroy),
hs_str_cfunc("makeContextCurrent", window_make_context_current),
hs_str_cfunc("setHint", window_set_hint),
hs_str_cfunc("shouldClose", window_should_close),
hs_str_cfunc("pollEvents", window_poll_events),
hs_str_cfunc("swapBuffers", window_swap_buffers),
hs_str_cfunc("setFramebufferSizeCallback", window_set_framebuffer_size_callback),
hs_str_cfunc("getTime", window_get_time),
hs_str_tbl("hintType", hint_types),
hs_str_tbl("profileType", profile_types),
);
lua_setfield(L, honey_index, "window");
}
static void framebuffer_size_callback_(GLFWwindow *win, int width, int height)
{
struct window_data *wdata = glfwGetWindowUserPointer(win);
if (wdata->framebuffer_size_callback != LUA_NOREF) {
hs_rload(wdata->L, wdata->framebuffer_size_callback);
lua_pushlightuserdata(wdata->L, win);
lua_pushinteger(wdata->L, width);
lua_pushinteger(wdata->L, height);
hs_call(wdata->L, 3, 0);
}
}
int window_create(lua_State *L)
{
lua_Integer width, height;
char *title;
hs_parse_args(L, hs_int(width), hs_int(height), hs_str(title));
GLFWwindow **win = lua_newuserdata(L, sizeof(GLFWwindow *));
*win = glfwCreateWindow(width, height, title, NULL, NULL);
if (*win == NULL)
hs_throw_error(L, "failed to create window");
struct window_data *wdata = create_window_data(L);
glfwSetWindowUserPointer(*win, wdata);
glfwSetFramebufferSizeCallback(*win, framebuffer_size_callback_);
luaL_getmetatable(L, window_tname);
lua_setmetatable(L, -2);
return 1;
}
int window_destroy(lua_State *L)
{
GLFWwindow **win = luaL_checkudata(L, 1, window_tname);
void *wdata = glfwGetWindowUserPointer(*win);
if (wdata != NULL) {
free(wdata);
glfwSetWindowUserPointer(*win, NULL);
}
glfwDestroyWindow(*win);
return 0;
}
int window_make_context_current(lua_State *L)
{
GLFWwindow **win = luaL_checkudata(L, 1, window_tname);
glfwMakeContextCurrent(*win);
return 0;
}
int window_set_hint(lua_State *L)
{
int hint = luaL_checkinteger(L, 1);
int value = luaL_checkinteger(L, 2);
glfwWindowHint(hint, value);
return 0;
}
int window_should_close(lua_State *L)
{
GLFWwindow **win = luaL_checkudata(L, 1, window_tname);
lua_pushboolean(L, glfwWindowShouldClose(*win));
return 1;
}
int window_poll_events(lua_State *L)
{
glfwPollEvents();
return 0;
}
int window_swap_buffers(lua_State *L)
{
GLFWwindow **win = luaL_checkudata(L, 1, window_tname);
glfwSwapBuffers(*win);
return 0;
}
int window_set_framebuffer_size_callback(lua_State *L)
{
GLFWwindow **win = luaL_checkudata(L, 1, window_tname);
luaL_checktype(L, 2, LUA_TFUNCTION);
int func = 2;
struct window_data *wdata = glfwGetWindowUserPointer(*win);
lua_pushvalue(L, func);
wdata->framebuffer_size_callback = hs_rstore(L);
return 0;
}
int window_get_time(lua_State *L)
{
lua_pushnumber(L, glfwGetTime());
return 1;
}
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