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Libretro: Add support for touch emulation with joystick

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This commit is contained in:
Jonian Guveli 2024-09-06 19:36:41 +03:00
parent c2b479889c
commit ab4d97ba2f
1 changed files with 56 additions and 12 deletions
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68
src/libretro_core.cpp
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@ -17,7 +17,13 @@ static retro_input_state_t inputStateCallback;
static retro_hw_render_callback hwRender;
static std::filesystem::path savePath;
static std::string touchScreenMode;
static bool screenTouched;
static int lastMouseX;
static int lastMouseY;
static int touchX = 0;
static int touchY = 0;
std::unique_ptr<Emulator> emulator;
RendererGL* renderer;
@ -123,8 +129,11 @@ static void inputInit() {
{0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L"},
{0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "X"},
{0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "Y"},
{0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Screen Touch"},
{0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_X, "Circle Pad X"},
{0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_Y, "Circle Pad Y"},
{0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_X, "Pointer X"},
{0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y, "Pointer Y"},
{0},
};
@ -182,6 +191,7 @@ static void configInit() {
{"panda3ds_write_protect_virtual_sd", "Write protect virtual SD card; disabled|enabled"},
{"panda3ds_battery_level", "Battery percentage; 5|10|20|30|50|70|90|100"},
{"panda3ds_use_charger", "Charger plugged; enabled|disabled"},
{"panda3ds_touchscreen_mode", "Touchscreen touch mode; Auto|Pointer|Joystick|None"},
{nullptr, nullptr},
};
@ -212,8 +222,11 @@ static void configUpdate() {
config.lightShadergenThreshold = fetchVariableRange("panda3ds_ubershader_lighting_override_threshold", 1, 8);
config.discordRpcEnabled = false;
touchScreenMode = fetchVariable("panda3ds_touchscreen_mode", "Auto");
// Handle any settings that might need the emulator core to be notified when they're changed, and save the config.
emulator->setAudioEnabled(config.audioEnabled);
config.save();
}
@ -348,26 +361,57 @@ void retro_run() {
bool touchScreen = false;
const int posX = inputStateCallback(0, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_X);
const int posY = inputStateCallback(0, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_Y);
const int newX = static_cast<int>((posX + 0x7fff) / (float)(0x7fff * 2) * emulator->width);
const int newY = static_cast<int>((posY + 0x7fff) / (float)(0x7fff * 2) * emulator->height);
int pointerX = touchX;
int pointerY = touchY;
const int offsetX = 40;
const int offsetY = emulator->height / 2;
const bool inScreenX = newX >= offsetX && newX <= emulator->width - offsetX;
const bool inScreenY = newY >= offsetY && newY <= emulator->height;
if (touchScreenMode == "Pointer" || touchScreenMode == "Auto") {
const int posX = inputStateCallback(0, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_X);
const int posY = inputStateCallback(0, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_Y);
if (inScreenX && inScreenY) {
touchScreen |= inputStateCallback(0, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_LEFT);
touchScreen |= inputStateCallback(0, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_PRESSED);
const int newX = static_cast<int>((posX + 0x7fff) / (float)(0x7fff * 2) * emulator->width);
const int newY = static_cast<int>((posY + 0x7fff) / (float)(0x7fff * 2) * emulator->height);
const bool inScreenX = newX >= offsetX && newX <= emulator->width - offsetX;
const bool inScreenY = newY >= offsetY && newY <= emulator->height;
if (inScreenX && inScreenY) {
touchScreen |= inputStateCallback(0, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_LEFT);
touchScreen |= inputStateCallback(0, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_PRESSED);
}
if ((posX != 0 || posY != 0) && (lastMouseX != newX || lastMouseY != newY)) {
lastMouseX = newX;
lastMouseY = newY;
pointerX = newX - offsetX;
pointerY = newY - offsetY;
}
}
if (touchScreenMode == "Joystick" || touchScreenMode == "Auto") {
const float speedX = (emulator->width / 60.0);
const float speedY = (emulator->height / 2 / 60.0);
const float moveX = getAxisState(RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_X);
const float moveY = getAxisState(RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y);
touchScreen |= getButtonState(RETRO_DEVICE_ID_JOYPAD_R3);
if (moveX != 0 || moveY != 0) {
pointerX += static_cast<int>((moveX / 32767) * speedX);
pointerY += static_cast<int>((moveY / 32767) * speedY);
}
}
touchX = std::clamp(pointerX, 0, (int)(emulator->width - (offsetX * 2)));
touchY = std::clamp(pointerY, 0, (int)(emulator->height - offsetY));
if (touchScreen) {
u16 x = static_cast<u16>(newX - offsetX);
u16 y = static_cast<u16>(newY - offsetY);
u16 x = static_cast<u16>(touchX);
u16 y = static_cast<u16>(touchY);
hid.setTouchScreenPress(x, y);
screenTouched = true;