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#include <honeysuckle.h>
#include <stdbool.h>
#include "logging/logging.h"
#include "gl/honey_gl.h"
struct honey_window window;
static int resize_callback_ref = LUA_NOREF;
static int resize_data_ref = LUA_NOREF;
static int focus_callback_ref = LUA_NOREF;
static int focus_data_ref = LUA_NOREF;
static void error_callback(int code, const char *description);
static void resize_callback(GLFWwindow *w, int width, int height);
static void focus_callback(GLFWwindow *w, int focus);
static int create_window(lua_State *L);
static int window_get_size(lua_State *L);
static int window_set_size(lua_State *L);
static int window_set_resize_callback(lua_State *L);
static int window_unset_resize_callback(lua_State *L);
void setup_window(lua_State *L, int tbl_index)
{
/* initialize window struct */
window.created = false;
window.L = L;
/* set error handler */
glfwSetErrorCallback(error_callback);
/* create window table */
hs_create_table
(L,
hs_str_cfunc("createWindow", create_window),
hs_str_cfunc("getSize", window_get_size),
hs_str_cfunc("setSize", window_set_size),
hs_str_cfunc("setResizeCallback", window_set_resize_callback),
hs_str_cfunc("unsetResizeCallback", window_unset_resize_callback)
);
/* set honey table entry */
lua_setfield(L, tbl_index, "window");
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* glfw callbacks
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
static void error_callback(int code, const char *description)
{
honey_error("GLFW error %d: %s", code, description);
hs_throw_error(window.L, "(GLFW error %d) %s", code, description);
}
static void resize_callback(GLFWwindow *w, int width, int height)
{
lua_State *L = window.L;
if (resize_callback_ref == LUA_NOREF)
/* no resize callback set */
return;
/* push callback function */
hs_rload(L, resize_callback_ref);
lua_pushinteger(L, width);
lua_pushinteger(L, height);
if (resize_data_ref == LUA_NOREF || resize_data_ref == LUA_REFNIL)
lua_pushnil(L);
else
hs_rload(L, resize_data_ref);
hs_call(L, 3, 0);
}
static void focus_callback(GLFWwindow *w, int focus)
{
lua_State *L = window.L;
if (focus_callback_ref == LUA_NOREF)
/* no focus callback set */
return;
/* push callback function */
hs_rload(L, focus_callback_ref);
lua_pushboolean(L, focus);
if (focus_data_ref == LUA_NOREF || focus_data_ref == LUA_REFNIL)
lua_pushnil(L);
else
hs_rload(L, focus_data_ref);
hs_call(L, 2, 0);
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* window
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
static int create_window(lua_State *L)
{
/* return immediately if already called */
if (window.created) return 0;
lua_Integer x, y;
hs_parse_args(L, hs_int(x), hs_int(y));
if (!glfwInit()) {
/* window creation failed :c */
honey_fatal("failed to create window!");
hs_throw_error(L, "failed to create window!");
}
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
window.window = glfwCreateWindow(x, y, "honey", NULL, NULL);
glfwMakeContextCurrent(window.window);
if (!gladLoadGLLoader((GLADloadproc) glfwGetProcAddress)) {
honey_fatal("failed to initialize GLAD");
glfwTerminate();
hs_throw_error(L, "failed to initialize GLAD");
}
/* bind resize/focus callbacks */
glfwSetWindowSizeCallback(window.window, resize_callback);
glfwSetWindowFocusCallback(window.window, focus_callback);
}
static int window_get_size(lua_State *L)
{
int width, height;
glfwGetWindowSize(window.window, &width, &height);
lua_pushinteger(L, width);
lua_pushinteger(L, height);
return 2;
}
static int window_set_size(lua_State *L)
{
lua_Integer width, height;
hs_parse_args(L, hs_int(width), hs_int(height));
glfwSetWindowSize(window.window, width, height);
return 0;
}
static int window_set_resize_callback(lua_State *L)
{
int cb, data;
hs_parse_args(L, hs_func(cb), hs_any(data));
lua_pushvalue(L, cb);
resize_callback_ref = hs_rstore(L);
lua_pushvalue(L, data);
resize_data_ref = hs_rstore(L);
return 0;
}
static int window_unset_resize_callback(lua_State *L)
{
if (resize_callback_ref != LUA_NOREF)
hs_rdel(L, resize_callback_ref);
if (resize_data_ref != LUA_NOREF)
hs_rdel(L, resize_callback_ref);
resize_callback_ref = LUA_NOREF;
resize_data_ref = LUA_NOREF;
return 0;
}
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