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#define AL_LOG_SECTION "window"
#include <al/log.h>
#include "window.h"
#include "keys.h"
static bool nop_pointer_pos_callback(void *userdata, f64 x, f64 y)
{
(void)userdata;
(void)x;
(void)y;
return false;
}
static bool nop_touch_callback(void *userdata, s32 index, u8 phase, f64 x, f64 y)
{
(void)userdata;
(void)index;
(void)phase;
(void)x;
(void)y;
return false;
}
static bool nop_scroll_callback(void *userdata, f64 y)
{
(void)userdata;
(void)y;
return false;
}
static bool nop_mouse_button_callback(void *userdata, u8 state, u8 button)
{
(void)userdata;
(void)state;
(void)button;
return false;
}
static bool nop_key_callback(void *userdata, u8 state, u16 button)
{
(void)userdata;
(void)state;
(void)button;
return false;
}
static bool nop_key_immediate_callback(void *userdata, u8 state, u16 button)
{
(void)userdata;
(void)state;
(void)button;
return false;
}
static void window_default_close(struct stl_window *window)
{
window->closed = true;
}
void stl_window_init(struct stl_window *window)
{
window->pointer_pos_callback = nop_pointer_pos_callback;
window->touch_callback = nop_touch_callback;
window->scroll_callback = nop_scroll_callback;
window->mouse_button_callback = nop_mouse_button_callback;
window->key_callback = nop_key_callback;
window->key_immediate_callback = nop_key_immediate_callback;
window->close = window_default_close;
#ifdef STELA_EVENT_BUFFER
al_ring_buffer_init(&window->events, window->data, STELA_EVENTS_SIZE);
#endif
window->closed = false;
window->held_modifiers = 0;
#ifdef STELA_PAUSE
window->pending_refresh = true;
#endif
}
void stl_window_created(struct stl_window *window, u32 width, u32 height, u32 flags)
{
window->width = width;
window->height = height;
window->flags = flags;
}
void stl_window_send_render_event(struct stl_window *window)
{
if (window->render_callback) {
window->render_callback(window->userdata);
}
}
#ifdef STELA_EVENT_BUFFER
#define GET_EVENT_CHUNK(op) \
ptrdiff_t size; \
u8 *ptr = al_ring_buffer_write_chunk(&window->events, &size); \
if (size < STELA_EVENT_SIZE) { \
log_warn("Buffer full, discarding event."); \
return; \
} \
ptr[0] = op
#endif
#define APPEND_EVENT_CHUNK() \
al_ring_buffer_append(&window->events, ptr, STELA_EVENT_SIZE)
void stl_window_send_resize_event(struct stl_window *window, u32 width, u32 height)
{
al_assert(width == window->width && height == window->height);
#ifdef STELA_EVENT_BUFFER
window->pending_resize = true;
#else
window->resize_internal(window, width, height);
if (window->resize_callback) {
window->resize_callback(window->userdata, width, height);
}
#ifdef STELA_PAUSE
window->pending_refresh = true;
#endif
#endif
}
void stl_window_send_pointer_pos_event(struct stl_window *window, f64 x, f64 y)
{
#ifdef STELA_EVENT_BUFFER
GET_EVENT_CHUNK(STELA_EVENT_POINTER_POS);
((f64 *)(&ptr[1]))[0] = x;
((f64 *)(&ptr[9]))[0] = y;
APPEND_EVENT_CHUNK();
#else
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->pointer_pos_callback(window->userdata, x, y);
#endif
}
void stl_window_send_touch_event(struct stl_window *window, s32 index, u8 phase, f64 x, f64 y)
{
#ifdef STELA_EVENT_BUFFER
GET_EVENT_CHUNK(STELA_EVENT_TOUCH);
((s32 *)(&ptr[1]))[0] = index;
ptr[5] = phase;
((f64 *)(&ptr[6]))[0] = x;
((f64 *)(&ptr[14]))[0] = y;
APPEND_EVENT_CHUNK();
#else
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->touch_callback(window->userdata, index, phase, x, y);
#endif
}
void stl_window_send_scroll_event(struct stl_window *window, f64 y)
{
#ifdef STELA_EVENT_BUFFER
GET_EVENT_CHUNK(STELA_EVENT_SCROLL);
((f64 *)(&ptr[1]))[0] = y;
APPEND_EVENT_CHUNK();
#else
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->scroll_callback(window->userdata, y);
#endif
}
void stl_window_send_mouse_button_event(struct stl_window *window, u8 state, u8 button)
{
#ifdef STELA_EVENT_BUFFER
GET_EVENT_CHUNK(STELA_EVENT_MOUSE_BUTTON);
ptr[1] = state;
ptr[2] = button;
APPEND_EVENT_CHUNK();
#else
window->held_mouse_buttons = (window->held_mouse_buttons & ~button) | (button * (state == STELA_BUTTON_PRESSED));
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->mouse_button_callback(window->userdata, state, button);
#endif
}
void stl_window_drop_mouse_buttons(struct stl_window *window)
{
u8 *buttons = stl_all_mouse_buttons;
while (window->held_mouse_buttons) {
u8 button = *buttons++;
if (window->held_mouse_buttons & button) {
stl_window_send_mouse_button_event(window, STELA_BUTTON_RELEASED, button);
}
}
al_assert(!window->held_mouse_buttons);
}
#ifdef STELA_WINDOW_WIN32
// It's possible for a window to behave in a way that disallows
// consistancy between BUTTON_PRESSED and BUTTON_RELEASED events.
#define STELA_CORRECT_MODIFIER_INCONSISTENCY
#endif
void stl_window_send_key_event(struct stl_window *window, u8 state, u16 button)
{
u32 mod = stl_key_to_mod(button);
#ifdef STELA_CORRECT_MODIFIER_INCONSISTENCY
if (state == STELA_BUTTON_PRESSED) {
if (window->held_modifiers & mod) {
window->held_modifiers &= ~mod;
window->key_callback(window->userdata, STELA_BUTTON_RELEASED, button);
}
} else {
if (!(window->held_modifiers & mod)) return;
}
#endif
window->held_modifiers = (window->held_modifiers & ~mod) | (mod * (state == STELA_BUTTON_PRESSED));
#ifdef STELA_EVENT_BUFFER
GET_EVENT_CHUNK(STELA_EVENT_KEY);
ptr[1] = state;
((u16 *)(&ptr[2]))[0] = button;
APPEND_EVENT_CHUNK();
#else
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->key_callback(window->userdata, state, button);
#endif
}
bool stl_window_send_key_immediate_event(struct stl_window *window, u8 state, u16 button)
{
// Don't send modifiers on key immediate.
return window->key_immediate_callback(window->userdata, state, button * (stl_key_to_mod(button) == STELA_MOD_NONE));
}
void stl_window_drop_modifiers(struct stl_window *window)
{
u32 *mods = stl_all_modifiers;
while (window->held_modifiers) {
u32 mod = *mods++;
if (window->held_modifiers & mod) {
stl_window_send_key_event(window, STELA_BUTTON_RELEASED, stl_mod_to_key(mod));
}
}
al_assert(!window->held_modifiers);
}
void stl_window_send_should_close_event(struct stl_window *window)
{
#ifdef STELA_EVENT_BUFFER
GET_EVENT_CHUNK(STELA_EVENT_SHOULD_CLOSE);
APPEND_EVENT_CHUNK();
#else
if (window->should_close_callback) {
window->should_close_callback(window->userdata);
}
#endif
}
#ifdef STELA_EVENT_BUFFER
bool stl_window_read_events(struct stl_window *window)
{
u8 op = STELA_EVENT_NONE;
if (window->pending_resize) {
op = STELA_EVENT_RESIZE;
window->resize_internal(window, window->width, window->height);
if (window->resize_callback) {
window->resize_callback(window->userdata, window->width, window->height);
}
#ifdef STELA_PAUSE
window->pending_refresh = true;
#endif
window->pending_resize = false;
}
ptrdiff_t size;
u8 *ptr = al_ring_buffer_read_chunk(&window->events, &size);
u8 *bc = ptr;
while (bc - ptr < size) {
op = *bc;
switch (op) {
case STELA_EVENT_POINTER_POS: {
f64 x = ((f64 *)(&bc[1]))[0];
f64 y = ((f64 *)(&bc[9]))[0];
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->pointer_pos_callback(window->userdata, x, y);
break;
}
case STELA_EVENT_TOUCH: {
s32 index = ((s32 *)(&bc[1]))[0];
u8 phase = bc[5];
f64 x = ((f64 *)(&bc[6]))[0];
f64 y = ((f64 *)(&bc[14]))[0];
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->touch_callback(window->userdata, index, phase, x, y);
break;
}
case STELA_EVENT_SCROLL: {
f64 y = ((f64 *)(&bc[1]))[0];
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->scroll_callback(window->userdata, y);
break;
}
case STELA_EVENT_MOUSE_BUTTON: {
u8 state = bc[1];
u8 button = bc[2];
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->mouse_button_callback(window->userdata, state, button);
break;
}
case STELA_EVENT_KEY: {
u8 state = bc[1];
u16 button = ((u16 *)(&bc[2]))[0];
#ifdef STELA_PAUSE
window->pending_refresh |=
#endif
window->key_callback(window->userdata, state, button);
break;
}
case STELA_EVENT_SHOULD_CLOSE: {
if (window->should_close_callback) {
window->should_close_callback(window->userdata);
}
break;
}
default:
break;
}
bc += STELA_EVENT_SIZE;
}
al_assert(bc - ptr == size);
al_ring_buffer_consume(&window->events, ptr, size);
return op != STELA_EVENT_NONE;
}
#endif
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