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Relocate emscripten callbacks on web
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ubkp committed Sep 23, 2023
1 parent 2ef9274 commit 9f45f5c
Showing 1 changed file with 145 additions and 145 deletions.
290 changes: 145 additions & 145 deletions src/rcore_web.c
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Original file line number Diff line number Diff line change
Expand Up @@ -186,151 +186,6 @@ void InitWindow(int width, int height, const char *title)
#endif
}

// Register fullscreen change events
static EM_BOOL EmscriptenFullscreenChangeCallback(int eventType, const EmscriptenFullscreenChangeEvent *event, void *userData)
{
// TODO: Implement EmscriptenFullscreenChangeCallback()?

return 1; // The event was consumed by the callback handler
}

// Register window resize event
static EM_BOOL EmscriptenWindowResizedCallback(int eventType, const EmscriptenUiEvent *event, void *userData)
{
// TODO: Implement EmscriptenWindowResizedCallback()?

return 1; // The event was consumed by the callback handler
}

EM_JS(int, GetWindowInnerWidth, (), { return window.innerWidth; });
EM_JS(int, GetWindowInnerHeight, (), { return window.innerHeight; });

// Register DOM element resize event
static EM_BOOL EmscriptenResizeCallback(int eventType, const EmscriptenUiEvent *event, void *userData)
{
// Don't resize non-resizeable windows
if ((CORE.Window.flags & FLAG_WINDOW_RESIZABLE) == 0) return 1;

// This event is called whenever the window changes sizes,
// so the size of the canvas object is explicitly retrieved below
int width = GetWindowInnerWidth();
int height = GetWindowInnerHeight();

if (width < CORE.Window.screenMin.width) width = CORE.Window.screenMin.width;
else if (width > CORE.Window.screenMax.width && CORE.Window.screenMax.width > 0) width = CORE.Window.screenMax.width;

if (height < CORE.Window.screenMin.height) height = CORE.Window.screenMin.height;
else if (height > CORE.Window.screenMax.height && CORE.Window.screenMax.height > 0) height = CORE.Window.screenMax.height;

emscripten_set_canvas_element_size("#canvas", width, height);

SetupViewport(width, height); // Reset viewport and projection matrix for new size

CORE.Window.currentFbo.width = width;
CORE.Window.currentFbo.height = height;
CORE.Window.resizedLastFrame = true;

if (IsWindowFullscreen()) return 1;

// Set current screen size
CORE.Window.screen.width = width;
CORE.Window.screen.height = height;

// NOTE: Postprocessing texture is not scaled to new size

return 0;
}

// Register mouse input events
static EM_BOOL EmscriptenMouseCallback(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
{
// This is only for registering mouse click events with emscripten and doesn't need to do anything

return 1; // The event was consumed by the callback handler
}

// Register connected/disconnected gamepads events
static EM_BOOL EmscriptenGamepadCallback(int eventType, const EmscriptenGamepadEvent *gamepadEvent, void *userData)
{
/*
TRACELOGD("%s: timeStamp: %g, connected: %d, index: %ld, numAxes: %d, numButtons: %d, id: \"%s\", mapping: \"%s\"",
eventType != 0? emscripten_event_type_to_string(eventType) : "Gamepad state",
gamepadEvent->timestamp, gamepadEvent->connected, gamepadEvent->index, gamepadEvent->numAxes, gamepadEvent->numButtons, gamepadEvent->id, gamepadEvent->mapping);
for (int i = 0; i < gamepadEvent->numAxes; ++i) TRACELOGD("Axis %d: %g", i, gamepadEvent->axis[i]);
for (int i = 0; i < gamepadEvent->numButtons; ++i) TRACELOGD("Button %d: Digital: %d, Analog: %g", i, gamepadEvent->digitalButton[i], gamepadEvent->analogButton[i]);
*/

if ((gamepadEvent->connected) && (gamepadEvent->index < MAX_GAMEPADS))
{
CORE.Input.Gamepad.ready[gamepadEvent->index] = true;
sprintf(CORE.Input.Gamepad.name[gamepadEvent->index], "%s", gamepadEvent->id);
}
else CORE.Input.Gamepad.ready[gamepadEvent->index] = false;

return 1; // The event was consumed by the callback handler
}

// Register touch input events
static EM_BOOL EmscriptenTouchCallback(int eventType, const EmscriptenTouchEvent *touchEvent, void *userData)
{
// Register touch points count
CORE.Input.Touch.pointCount = touchEvent->numTouches;

double canvasWidth = 0.0;
double canvasHeight = 0.0;
// NOTE: emscripten_get_canvas_element_size() returns canvas.width and canvas.height but
// we are looking for actual CSS size: canvas.style.width and canvas.style.height
// EMSCRIPTEN_RESULT res = emscripten_get_canvas_element_size("#canvas", &canvasWidth, &canvasHeight);
emscripten_get_element_css_size("#canvas", &canvasWidth, &canvasHeight);

for (int i = 0; (i < CORE.Input.Touch.pointCount) && (i < MAX_TOUCH_POINTS); i++)
{
// Register touch points id
CORE.Input.Touch.pointId[i] = touchEvent->touches[i].identifier;

// Register touch points position
CORE.Input.Touch.position[i] = (Vector2){touchEvent->touches[i].targetX, touchEvent->touches[i].targetY};

// Normalize gestureEvent.position[x] for CORE.Window.screen.width and CORE.Window.screen.height
CORE.Input.Touch.position[i].x *= ((float)GetScreenWidth() / (float)canvasWidth);
CORE.Input.Touch.position[i].y *= ((float)GetScreenHeight() / (float)canvasHeight);

if (eventType == EMSCRIPTEN_EVENT_TOUCHSTART) CORE.Input.Touch.currentTouchState[i] = 1;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHEND) CORE.Input.Touch.currentTouchState[i] = 0;
}

#if defined(SUPPORT_GESTURES_SYSTEM) // PLATFORM_WEB
GestureEvent gestureEvent = {0};

gestureEvent.pointCount = CORE.Input.Touch.pointCount;

// Register touch actions
if (eventType == EMSCRIPTEN_EVENT_TOUCHSTART) gestureEvent.touchAction = TOUCH_ACTION_DOWN;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHEND) gestureEvent.touchAction = TOUCH_ACTION_UP;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHMOVE) gestureEvent.touchAction = TOUCH_ACTION_MOVE;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHCANCEL) gestureEvent.touchAction = TOUCH_ACTION_CANCEL;

for (int i = 0; (i < gestureEvent.pointCount) && (i < MAX_TOUCH_POINTS); i++)
{
gestureEvent.pointId[i] = CORE.Input.Touch.pointId[i];
gestureEvent.position[i] = CORE.Input.Touch.position[i];

// Normalize gestureEvent.position[i]
gestureEvent.position[i].x /= (float)GetScreenWidth();
gestureEvent.position[i].y /= (float)GetScreenHeight();
}

// Gesture data is sent to gestures system for processing
ProcessGestureEvent(gestureEvent);

// Reset the pointCount for web, if it was the last Touch End event
if (eventType == EMSCRIPTEN_EVENT_TOUCHEND && CORE.Input.Touch.pointCount == 1) CORE.Input.Touch.pointCount = 0;
#endif

return 1; // The event was consumed by the callback handler
}

// Initialize display device and framebuffer
// NOTE: width and height represent the screen (framebuffer) desired size, not actual display size
// If width or height are 0, default display size will be used for framebuffer size
Expand Down Expand Up @@ -1526,3 +1381,148 @@ static void WindowDropCallback(GLFWwindow *window, int count, const char **paths
}
}
}

// Register fullscreen change events
static EM_BOOL EmscriptenFullscreenChangeCallback(int eventType, const EmscriptenFullscreenChangeEvent *event, void *userData)
{
// TODO: Implement EmscriptenFullscreenChangeCallback()?

return 1; // The event was consumed by the callback handler
}

// Register window resize event
static EM_BOOL EmscriptenWindowResizedCallback(int eventType, const EmscriptenUiEvent *event, void *userData)
{
// TODO: Implement EmscriptenWindowResizedCallback()?

return 1; // The event was consumed by the callback handler
}

EM_JS(int, GetWindowInnerWidth, (), { return window.innerWidth; });
EM_JS(int, GetWindowInnerHeight, (), { return window.innerHeight; });

// Register DOM element resize event
static EM_BOOL EmscriptenResizeCallback(int eventType, const EmscriptenUiEvent *event, void *userData)
{
// Don't resize non-resizeable windows
if ((CORE.Window.flags & FLAG_WINDOW_RESIZABLE) == 0) return 1;

// This event is called whenever the window changes sizes,
// so the size of the canvas object is explicitly retrieved below
int width = GetWindowInnerWidth();
int height = GetWindowInnerHeight();

if (width < CORE.Window.screenMin.width) width = CORE.Window.screenMin.width;
else if (width > CORE.Window.screenMax.width && CORE.Window.screenMax.width > 0) width = CORE.Window.screenMax.width;

if (height < CORE.Window.screenMin.height) height = CORE.Window.screenMin.height;
else if (height > CORE.Window.screenMax.height && CORE.Window.screenMax.height > 0) height = CORE.Window.screenMax.height;

emscripten_set_canvas_element_size("#canvas", width, height);

SetupViewport(width, height); // Reset viewport and projection matrix for new size

CORE.Window.currentFbo.width = width;
CORE.Window.currentFbo.height = height;
CORE.Window.resizedLastFrame = true;

if (IsWindowFullscreen()) return 1;

// Set current screen size
CORE.Window.screen.width = width;
CORE.Window.screen.height = height;

// NOTE: Postprocessing texture is not scaled to new size

return 0;
}

// Register mouse input events
static EM_BOOL EmscriptenMouseCallback(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
{
// This is only for registering mouse click events with emscripten and doesn't need to do anything

return 1; // The event was consumed by the callback handler
}

// Register connected/disconnected gamepads events
static EM_BOOL EmscriptenGamepadCallback(int eventType, const EmscriptenGamepadEvent *gamepadEvent, void *userData)
{
/*
TRACELOGD("%s: timeStamp: %g, connected: %d, index: %ld, numAxes: %d, numButtons: %d, id: \"%s\", mapping: \"%s\"",
eventType != 0? emscripten_event_type_to_string(eventType) : "Gamepad state",
gamepadEvent->timestamp, gamepadEvent->connected, gamepadEvent->index, gamepadEvent->numAxes, gamepadEvent->numButtons, gamepadEvent->id, gamepadEvent->mapping);
for (int i = 0; i < gamepadEvent->numAxes; ++i) TRACELOGD("Axis %d: %g", i, gamepadEvent->axis[i]);
for (int i = 0; i < gamepadEvent->numButtons; ++i) TRACELOGD("Button %d: Digital: %d, Analog: %g", i, gamepadEvent->digitalButton[i], gamepadEvent->analogButton[i]);
*/

if ((gamepadEvent->connected) && (gamepadEvent->index < MAX_GAMEPADS))
{
CORE.Input.Gamepad.ready[gamepadEvent->index] = true;
sprintf(CORE.Input.Gamepad.name[gamepadEvent->index], "%s", gamepadEvent->id);
}
else CORE.Input.Gamepad.ready[gamepadEvent->index] = false;

return 1; // The event was consumed by the callback handler
}

// Register touch input events
static EM_BOOL EmscriptenTouchCallback(int eventType, const EmscriptenTouchEvent *touchEvent, void *userData)
{
// Register touch points count
CORE.Input.Touch.pointCount = touchEvent->numTouches;

double canvasWidth = 0.0;
double canvasHeight = 0.0;
// NOTE: emscripten_get_canvas_element_size() returns canvas.width and canvas.height but
// we are looking for actual CSS size: canvas.style.width and canvas.style.height
// EMSCRIPTEN_RESULT res = emscripten_get_canvas_element_size("#canvas", &canvasWidth, &canvasHeight);
emscripten_get_element_css_size("#canvas", &canvasWidth, &canvasHeight);

for (int i = 0; (i < CORE.Input.Touch.pointCount) && (i < MAX_TOUCH_POINTS); i++)
{
// Register touch points id
CORE.Input.Touch.pointId[i] = touchEvent->touches[i].identifier;

// Register touch points position
CORE.Input.Touch.position[i] = (Vector2){touchEvent->touches[i].targetX, touchEvent->touches[i].targetY};

// Normalize gestureEvent.position[x] for CORE.Window.screen.width and CORE.Window.screen.height
CORE.Input.Touch.position[i].x *= ((float)GetScreenWidth() / (float)canvasWidth);
CORE.Input.Touch.position[i].y *= ((float)GetScreenHeight() / (float)canvasHeight);

if (eventType == EMSCRIPTEN_EVENT_TOUCHSTART) CORE.Input.Touch.currentTouchState[i] = 1;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHEND) CORE.Input.Touch.currentTouchState[i] = 0;
}

#if defined(SUPPORT_GESTURES_SYSTEM) // PLATFORM_WEB
GestureEvent gestureEvent = {0};

gestureEvent.pointCount = CORE.Input.Touch.pointCount;

// Register touch actions
if (eventType == EMSCRIPTEN_EVENT_TOUCHSTART) gestureEvent.touchAction = TOUCH_ACTION_DOWN;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHEND) gestureEvent.touchAction = TOUCH_ACTION_UP;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHMOVE) gestureEvent.touchAction = TOUCH_ACTION_MOVE;
else if (eventType == EMSCRIPTEN_EVENT_TOUCHCANCEL) gestureEvent.touchAction = TOUCH_ACTION_CANCEL;

for (int i = 0; (i < gestureEvent.pointCount) && (i < MAX_TOUCH_POINTS); i++)
{
gestureEvent.pointId[i] = CORE.Input.Touch.pointId[i];
gestureEvent.position[i] = CORE.Input.Touch.position[i];

// Normalize gestureEvent.position[i]
gestureEvent.position[i].x /= (float)GetScreenWidth();
gestureEvent.position[i].y /= (float)GetScreenHeight();
}

// Gesture data is sent to gestures system for processing
ProcessGestureEvent(gestureEvent);

// Reset the pointCount for web, if it was the last Touch End event
if (eventType == EMSCRIPTEN_EVENT_TOUCHEND && CORE.Input.Touch.pointCount == 1) CORE.Input.Touch.pointCount = 0;
#endif

return 1; // The event was consumed by the callback handler
}

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