Initial HID PAD work, with GLFW only.

1 files changed, 127 insertions, 7 deletions

diff --git a/src/core/hle/service/hid.cpp b/src/core/hle/service/hid.cpp
index 6a4895c90..1ef39fced 100644
--- a/src/core/hle/service/hid.cpp
+++ b/src/core/hle/service/hid.cpp
@@ -16,6 +16,121 @@ namespace HID_User {
 
 Handle g_shared_mem = 0; ///< Handle to shared memory region designated to HID_User service
 
+// Event handles
+Handle g_event_pad_or_touch_1 = 0;
+Handle g_event_pad_or_touch_2 = 0;
+Handle g_event_accelerometer = 0;
+Handle g_event_gyroscope = 0;
+Handle g_event_debug_pad = 0;
+
+// Next PAD state update information
+PADState g_next_state = {{0}};
+u32 g_next_index = 0;
+s16 g_next_circle_x = 0;
+s16 g_next_circle_y = 0;
+
+/** Gets a pointer to the PADData structure inside HID shared memory
+ */
+static inline PADData* GetPADData() {
+    if (0 == g_shared_mem)
+        return nullptr;
+
+    return reinterpret_cast<PADData*>(Kernel::GetSharedMemoryPointer(g_shared_mem, 0));
+}
+
+/** Circle PAD from keys.
+ *
+ *  This is implemented as "pushed all the way to an edge (max) or centered (0)".
+ *
+ *  Indicate the circle pad is pushed completely to the edge in 1 of 8 directions.
+ */
+void UpdateNextCirclePADState() {
+    static const s16 max_value = 0x9C;
+    g_next_circle_x = g_next_state.circle_left ? -max_value : 0x0;
+    g_next_circle_x += g_next_state.circle_right ? max_value : 0x0;
+    g_next_circle_y = g_next_state.circle_down ? -max_value : 0x0;
+    g_next_circle_y += g_next_state.circle_up ? max_value : 0x0;
+}
+
+/** Sets a PAD state (button or button combo) as pressed
+ */
+void PADButtonPress(PADState pad_state) {
+    g_next_state.hex |= pad_state.hex;
+    UpdateNextCirclePADState();
+}
+
+/** Sets a PAD state (button or button combo) as released
+ */
+void PADButtonRelease(PADState pad_state) {
+    g_next_state.hex &= ~pad_state.hex;
+    UpdateNextCirclePADState();
+}
+
+/** Called after all PAD changes to be included in this update have been made,
+ *  including both PAD key changes and analog circle PAD changes.
+ */
+void PADUpdateComplete() {
+    PADData* pad_data = GetPADData();
+
+    // Update PADData struct
+    pad_data->current_state.hex = g_next_state.hex;
+    pad_data->index = g_next_index;
+    g_next_index = (g_next_index + 1) % pad_data->entries.size();
+
+    // Get the previous PAD state
+    u32 last_entry_index = (pad_data->index - 1) % pad_data->entries.size();
+    PADState old_state = pad_data->entries[last_entry_index].current_state;
+
+    // Compute bitmask with 1s for bits different from the old state
+    PADState changed;
+    changed.hex = (g_next_state.hex ^ old_state.hex);
+
+    // Compute what was added
+    PADState additions;
+    additions.hex = changed.hex & g_next_state.hex;
+
+    // Compute what was removed
+    PADState removals;
+    removals.hex = changed.hex & old_state.hex;
+
+    // Get the current PAD entry
+    PADDataEntry* current_pad_entry = &pad_data->entries[pad_data->index];
+
+    // Update entry properties
+    current_pad_entry->current_state.hex = g_next_state.hex;
+    current_pad_entry->delta_additions.hex = additions.hex;
+    current_pad_entry->delta_removals.hex = removals.hex;
+
+    // Set circle PAD
+    current_pad_entry->circle_pad_x = g_next_circle_x;
+    current_pad_entry->circle_pad_y = g_next_circle_y;
+
+    // If we just updated index 0, provide a new timestamp
+    if (pad_data->index == 0) {
+        pad_data->index_reset_ticks_previous = pad_data->index_reset_ticks;
+        pad_data->index_reset_ticks = (s64)Core::g_app_core->GetTicks();
+    }
+
+    // Signal both handles when there's an update to PAD or touch
+    Kernel::SignalEvent(g_event_pad_or_touch_1);
+    Kernel::SignalEvent(g_event_pad_or_touch_2);
+}
+
+
+// TODO(peachum):
+// Add a method for setting analog input from joystick device for the circle PAD.
+//
+// This method should:
+//     * Be called after both PADButton<Press, Release>().
+//     * Be called before PADUpdateComplete()
+//     * Set current PADEntry.circle_pad_<axis> using analog data
+//     * Set PadData.raw_circle_pad_data
+//     * Set PadData.current_state.circle_right = 1 if current PADEntry.circle_pad_x >= 41
+//     * Set PadData.current_state.circle_up = 1 if current PADEntry.circle_pad_y >= 41
+//     * Set PadData.current_state.circle_left = 1 if current PADEntry.circle_pad_x <= -41
+//     * Set PadData.current_state.circle_right = 1 if current PADEntry.circle_pad_y <= -41
+
+
 /**
  * HID_User::GetIPCHandles service function
  *  Inputs:
@@ -35,11 +150,11 @@ void GetIPCHandles(Service::Interface* self) {
 
     cmd_buff[1] = 0; // No error
     cmd_buff[3] = g_shared_mem;
-    cmd_buff[4] = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventA");
-    cmd_buff[5] = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventB");
-    cmd_buff[6] = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventC");
-    cmd_buff[7] = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventGyroscope");
-    cmd_buff[8] = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventD");
+    cmd_buff[4] = g_event_pad_or_touch_1;
+    cmd_buff[5] = g_event_pad_or_touch_2;
+    cmd_buff[6] = g_event_accelerometer;
+    cmd_buff[7] = g_event_gyroscope;
+    cmd_buff[8] = g_event_debug_pad;
 
     DEBUG_LOG(KERNEL, "called");
 }
@@ -58,14 +173,19 @@ const Interface::FunctionInfo FunctionTable[] = {
 };
 
 
-
-
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Interface class
 
 Interface::Interface() {
     g_shared_mem = Kernel::CreateSharedMemory("HID_User:SharedMem"); // Create shared memory object
 
+    // Create event handles
+    g_event_pad_or_touch_1 = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventPADOrTouch1");
+    g_event_pad_or_touch_2 = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventPADOrTouch2");
+    g_event_accelerometer = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventAccelerometer");
+    g_event_gyroscope = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventGyroscope");
+    g_event_debug_pad = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventDebugPAD");
+
     Register(FunctionTable, ARRAY_SIZE(FunctionTable));
 }