PSP2: More settings for touch (direct touch on/off, pointer speed)

2 files changed, 240 insertions, 69 deletions

diff --git a/backends/events/psp2sdl/psp2sdl-events.cpp b/backends/events/psp2sdl/psp2sdl-events.cpp
index b774b9eda1..81f057f2e0 100644
--- a/backends/events/psp2sdl/psp2sdl-events.cpp
+++ b/backends/events/psp2sdl/psp2sdl-events.cpp
@@ -25,6 +25,7 @@
 #if defined(PSP2)
 
 #include <psp2/kernel/processmgr.h>
+#include <psp2/touch.h>
 #include "backends/platform/sdl/psp2/psp2.h"
 #include "backends/events/psp2sdl/psp2sdl-events.h"
 #include "backends/platform/sdl/sdl.h"
@@ -38,97 +39,256 @@
 
 PSP2EventSource::PSP2EventSource() {
 	for (int i = 0; i < SCE_TOUCH_PORT_MAX_NUM; i++) {
-		for (int j = 0; j < 2; j++) {
+		for (int j = 0; j < MAX_NUM_FINGERS; j++) {
 			_finger[i][j].id = -1;
 		}
 	}
+	// need specs of front panel for accurate direct touch
+	sceTouchGetPanelInfo(0, &panelInfo);
 }
 
 void PSP2EventSource::preprocessEvents(SDL_Event *event) {
 
-	// prevent suspend (scummvm games contains a lot of cutscenes..)
+	// prevent suspend (scummvm games contain a lot of cutscenes..)
 	sceKernelPowerTick(SCE_KERNEL_POWER_TICK_DISABLE_AUTO_SUSPEND);
 	sceKernelPowerTick(SCE_KERNEL_POWER_TICK_DISABLE_OLED_OFF);
 
-	// left mouse click gesture: single finger short tap
-	// right mouse click gesture: second finger short tap while first finger is still down
+	// Supported touch gestures:
+	// left mouse click: single finger short tap
+	// right mouse click: second finger short tap while first finger is still down
+	// pointer motion: single finger drag
 	if (event->type == SDL_FINGERDOWN || event->type == SDL_FINGERUP || event->type == SDL_FINGERMOTION) {
-		// front (0) or back (1)  panel?
+		// front (0) or back (1) panel
 		SDL_TouchID port = event->tfinger.touchId;
-		// which touchID (for multitouch)?
-		SDL_FingerID id = event->tfinger.fingerId;
-
-		int numFingersDown = 0;
-		for (int j = 0; j < 2; j++) {
-			if (_finger[port][j].id >= 0) {
-				numFingersDown++;
+		if (port < SCE_TOUCH_PORT_MAX_NUM && port >= 0) {
+			switch (event->type) {
+			case SDL_FINGERDOWN:
+				preprocessFingerDown(event);
+				break;
+			case SDL_FINGERUP:
+				preprocessFingerUp(event);
+				break;
+			case SDL_FINGERMOTION:
+				preprocessFingerMotion(event);
+				break;
 			}
 		}
+	}
+}
 
-		if (port < SCE_TOUCH_PORT_MAX_NUM && port >= 0) {
-			if (event->type == SDL_FINGERDOWN) {
-				for (int i = 0; i < 2; i++) {
-					if (_finger[port][i].id == -1 || i == 1) {
-						_finger[port][i].id = id;
-						_finger[port][i].timeLastDown = event->tfinger.timestamp;
-						break;
-					}
-				}
-			} else if (event->type == SDL_FINGERUP) {
-				// 250 ms long tap is interpreted as right/left mouse click depending on number of fingers down
-				for (int i = 0; i < 2; i++) {
-					if (_finger[port][i].id == id) {
-
-						_finger[port][i].id = -1;
-
-						if ((event->tfinger.timestamp - _finger[port][i].timeLastDown) <= 250) {
-							if (numFingersDown == 2 || numFingersDown == 1) {
-								Uint8 simulatedButton = 0;
-								if (numFingersDown == 2) {
-									simulatedButton = SDL_BUTTON_RIGHT;
-								} else if (numFingersDown == 1) {
-									simulatedButton = SDL_BUTTON_LEFT;
-								}
-
-								// simulate button click due to tap gesture
-								event->type = SDL_MOUSEBUTTONDOWN;
-								event->button.button = simulatedButton;
-								event->button.x = _km.x / MULTIPLIER;
-								event->button.y = _km.y / MULTIPLIER;
-
-								SDL_Event ev;
-								ev.type = SDL_MOUSEBUTTONUP;
-								ev.button.button = simulatedButton;
-								ev.button.x = _km.x / MULTIPLIER;
-								ev.button.y = _km.y / MULTIPLIER;
-								SDL_PushEvent(&ev);
-							}
-						}
+void PSP2EventSource::preprocessFingerDown(SDL_Event *event) {
+	// front (0) or back (1) panel
+	SDL_TouchID port = event->tfinger.touchId;
+	// id (for multitouch)
+	SDL_FingerID id = event->tfinger.fingerId;
+
+	// find out how many fingers were down before this event
+	int numFingersDown = 0;
+	for (int i = 0; i < MAX_NUM_FINGERS; i++) {
+		if (_finger[port][i].id >= 0) {
+			numFingersDown++;
+		}
+	}
+
+	for (int i = 0; i < MAX_NUM_FINGERS; i++) {
+		if (_finger[port][i].id == -1) {
+			_finger[port][i].id = id;
+			_finger[port][i].timeLastDown = event->tfinger.timestamp;
+			break;
+		}
+	}
+}
+
+void PSP2EventSource::preprocessFingerUp(SDL_Event *event) {
+	// front (0) or back (1) panel
+	SDL_TouchID port = event->tfinger.touchId;
+	// id (for multitouch)
+	SDL_FingerID id = event->tfinger.fingerId;
+
+	// find out how many fingers were down before this event
+	int numFingersDown = 0;
+	for (int i = 0; i < MAX_NUM_FINGERS; i++) {
+		if (_finger[port][i].id >= 0) {
+			numFingersDown++;
+		}
+	}
+
+	int x = _km.x / MULTIPLIER;
+	int y = _km.y / MULTIPLIER;
+
+	if (!ConfMan.getBool("touchpad_mouse_mode") && port == 0) {
+		convertTouchToGameXY(event->tfinger.x, event->tfinger.y, &x, &y);
+	}
+
+	for (int i = 0; i < MAX_NUM_FINGERS; i++) {
+		if (_finger[port][i].id == id) {
+			_finger[port][i].id = -1;
+			if ((event->tfinger.timestamp - _finger[port][i].timeLastDown) <= 250) {
+				// short (<250 ms) tap is interpreted as right/left mouse click depending on # fingers already down
+				if (numFingersDown == 2 || numFingersDown == 1) {
+					Uint8 simulatedButton = 0;
+					if (numFingersDown == 2) {
+						simulatedButton = SDL_BUTTON_RIGHT;
+					} else if (numFingersDown == 1) {
+						simulatedButton = SDL_BUTTON_LEFT;
 					}
-				}
-			} else if (event->type == SDL_FINGERMOTION && numFingersDown == 1) {
 
-				// convert touch events to relative mouse pointer events
-				Sint32 mouse_x = _km.x / MULTIPLIER + (event->tfinger.dx * _km.x_max);
-				Sint32 mouse_y = _km.y / MULTIPLIER + (event->tfinger.dy * _km.y_max);
+					event->type = SDL_MOUSEBUTTONDOWN;
+					event->button.button = simulatedButton;
+					event->button.x = x;
+					event->button.y = y;
 
-				if (mouse_x > _km.x_max) {
-					mouse_x = _km.x_max;
-				} else if (mouse_x < 0) {
-					mouse_x = 0;
-				}
-				if (mouse_y > _km.y_max) {
-					mouse_y = _km.y_max;
-				} else if (mouse_y < 0) {
-					mouse_y = 0;
+					SDL_Event ev;
+					ev.type = SDL_MOUSEBUTTONUP;
+					ev.button.button = simulatedButton;
+					ev.button.x = x;
+					ev.button.y = y;
+					SDL_PushEvent(&ev);
 				}
+			}
+		}
+	}
+}
+
+void PSP2EventSource::preprocessFingerMotion(SDL_Event *event) {
+	// front (0) or back (1) panel
+	SDL_TouchID port = event->tfinger.touchId;
+
+	// find out how many fingers were down before this event
+	int numFingersDown = 0;
+	for (int i = 0; i < MAX_NUM_FINGERS; i++) {
+		if (_finger[port][i].id >= 0) {
+			numFingersDown++;
+		}
+	}
+
+	if (numFingersDown == 1) {
 
-				event->type = SDL_MOUSEMOTION;
-				event->motion.x = mouse_x;
-				event->motion.y = mouse_y;
+		int x = _km.x / MULTIPLIER;;
+		int y = _km.y / MULTIPLIER;
+
+		if (!ConfMan.getBool("touchpad_mouse_mode") && port == 0) {
+			convertTouchToGameXY(event->tfinger.x, event->tfinger.y, &x, &y);
+		} else {
+			// for relative mode, use the pointer speed setting
+			float speedFactor = 1.0;
+
+			switch (ConfMan.getInt("kbdmouse_speed")) {
+			// 0.25 keyboard pointer speed
+			case 0:
+				speedFactor = 0.25;
+				break;
+			// 0.5 speed
+			case 1:
+				speedFactor = 0.5;
+				break;
+			// 0.75 speed
+			case 2:
+				speedFactor = 0.75;
+				break;
+			// 1.0 speed
+			case 3:
+				speedFactor = 1.0;
+				break;
+			// 1.25 speed
+			case 4:
+				speedFactor = 1.25;
+				break;
+			// 1.5 speed
+			case 5:
+				speedFactor = 1.5;
+				break;
+			// 1.75 speed
+			case 6:
+				speedFactor = 1.75;
+				break;
+			// 2.0 speed
+			case 7:
+				speedFactor = 2.0;
+				break;
+			default:
+				speedFactor = 1.0;
 			}
+
+			// convert touch events to relative mouse pointer events
+			// Whenever an SDL_event involving the mouse is processed,
+			// _km.x/y are truncated from subpixel precision to regular pixel precision.
+			// Therefore, there's no need here to deal with subpixel precision in _km.x/y.
+			x = (_km.x / MULTIPLIER + (event->tfinger.dx * 1.25 * speedFactor * _km.x_max));
+			y = (_km.y / MULTIPLIER + (event->tfinger.dy * 1.25 * speedFactor * _km.y_max));
+		}
+
+		if (x > _km.x_max) {
+			x = _km.x_max;
+		} else if (x < 0) {
+			x = 0;
+		}
+		if (y > _km.y_max) {
+			y = _km.y_max;
+		} else if (y < 0) {
+			y = 0;
 		}
+
+		event->type = SDL_MOUSEMOTION;
+		event->motion.x = x;
+		event->motion.y = y;
+	}
+}
+
+void PSP2EventSource::convertTouchToGameXY(float touchX, float touchY, int *gameX, int *gameY) {
+	// Find touch coordinates in terms of Vita screen pixels
+	float aaTouchX = touchX * (panelInfo.maxAaX - panelInfo.minAaX) + panelInfo.minAaX;
+	float aaTouchY = touchY * (panelInfo.maxAaY - panelInfo.minAaY) + panelInfo.minAaY;
+
+	float screenTouchX = (aaTouchX - panelInfo.minDispX) * 960 / panelInfo.maxDispX;
+	float screenTouchY = (aaTouchY - panelInfo.minDispY) * 544 / panelInfo.maxDispY;
+
+	// Find four corners of game screen in Vita screen coordinates
+	// This depends on the fullscreen and aspect ratio correction settings (at least on Vita)
+
+	float gameXMin = 0;
+	float gameXMax = 0;
+	float gameYMin = 0;
+	float gameYMax = 0;
+	float aspectRatio = 4.0 / 3.0;
+
+	// vertical
+	if (ConfMan.getBool("fullscreen")) {
+		gameYMin = 0.0;
+		gameYMax = 544.0;
+	} else {
+		if (_km.y_max <= 272) {
+			gameYMin = (544.0 - (_km.y_max * 2.0)) / 2.0;
+			gameYMax = 544.0 - gameYMin;
+		} else {
+			gameYMin = (544.0 - (_km.y_max)) / 2.0;
+			gameYMax = 544 - gameYMin;
+		}
+	}
+	// horizontal
+	if (ConfMan.getBool("aspect_ratio")) {
+		aspectRatio = 4.0/3.0;
+	} else {
+		aspectRatio = (float)_km.x_max / (float)_km.y_max;
+	}
+	gameXMin = (960 - (gameYMax - gameYMin) * aspectRatio) / 2.0;
+	gameXMax = 960.0 - gameXMin;
+
+	// find game pixel coordinates corresponding to front panel touch coordinates
+	int x = (screenTouchX - gameXMin) / (gameXMax - gameXMin) * _km.x_max;
+	int y = (screenTouchY - gameYMin) / (gameYMax - gameYMin) * _km.y_max;
+
+	if (x < 0) {
+		x = 0;
+	} else if (x > _km.x_max) {
+		x = _km.x_max;
+	} else if (y < 0) {
+		y = 0;
+	} else if (y > _km.y_max) {
+		y = _km.y_max;
 	}
+	*gameX = x;
+	*gameY = y;
 }
 
 #endif
diff --git a/backends/events/psp2sdl/psp2sdl-events.h b/backends/events/psp2sdl/psp2sdl-events.h
index a71553681a..a4143af157 100644
--- a/backends/events/psp2sdl/psp2sdl-events.h
+++ b/backends/events/psp2sdl/psp2sdl-events.h
@@ -34,11 +34,22 @@ public:
 	PSP2EventSource();
 protected:
 	void preprocessEvents(SDL_Event *event) override;
+private:
 	typedef struct {
 		int id; // -1: no touch
 		int timeLastDown;
 	} Touch;
-	Touch _finger[SCE_TOUCH_PORT_MAX_NUM][2]; // track only two fingers per panel
+
+	enum {
+		MAX_NUM_FINGERS = 3,
+	}; // track three fingers per panel
+	Touch _finger[SCE_TOUCH_PORT_MAX_NUM][MAX_NUM_FINGERS]; // keep track of finger status
+
+	void preprocessFingerDown(SDL_Event *event);
+	void preprocessFingerUp(SDL_Event *event);
+	void preprocessFingerMotion(SDL_Event *event);
+	void convertTouchToGameXY(float touchX, float touchY, int *gameX, int *gameY);
+	SceTouchPanelInfo panelInfo;
 };
 
 #endif /* BACKEND_EVENTS_PSP2_H */