3DS: Various fixes for touch input

1) Fixed can't really control camera (it resets position when you release touch)
2) Fix 'mouse' position being wrong for initial frame after touch begins
3) Fix 'mouse' position using coordinates of bottom screen instead of top screen

src/Window_3DS.c

@@ -7,6 +7,8 @@
 #include "Errors.h"
 #include <3ds.h>
 #include "_WindowBase.h"
+#include "ExtMath.h"
+static int touchActive;
 
 // Note from https://github.com/devkitPro/libctru/blob/master/libctru/include/3ds/gfx.h
 //  * Please note that the 3DS uses *portrait* screens rotated 90 degrees counterclockwise.
@@ -16,7 +18,7 @@ void Window_Init(void) {
 	//gfxInit(GSP_BGR8_OES,GSP_BGR8_OES,false); 
 	//gfxInit(GSP_BGR8_OES,GSP_RGBA8_OES,false);
 	//gfxInit(GSP_RGBA8_OES, GSP_BGR8_OES, false); 
-	gfxInit(GSP_BGR8_OES,GSP_BGR8_OES,false);
+	gfxInit(GSP_BGR8_OES, GSP_BGR8_OES, false);
 	
 	//gfxInit(GSP_RGBA8_OES,GSP_RGBA8_OES,false);
 	consoleInit(GFX_BOTTOM, NULL);
@@ -57,6 +59,9 @@ void Window_Close(void) {
 	/* TODO implement */
 }
 
+/*########################################################################################################################*
+*----------------------------------------------------Input processing-----------------------------------------------------*
+*#########################################################################################################################*/
 void Window_ProcessEvents(double delta) {
 	hidScanInput();
 	/* TODO implement */
@@ -100,52 +105,54 @@ void Window_ProcessEvents(double delta) {
 	Input_SetNonRepeatable(KeyBinds[KEYBIND_BACK],    mods & KEY_DUP);
 	Input_SetNonRepeatable(IPT_DOWN,                  mods & KEY_DUP);
 	
-	if (hidKeysHeld() & KEY_TOUCH) {
+	touchPosition touch;
-		int x, y;
+	hidTouchRead(&touch);
-		Cursor_GetRawPos(&x, &y);
+	touchActive = mods & KEY_TOUCH;
+	
+	if (touchActive) {
+		// rescale X from [0, bottom_FB_width) to [0, top_FB_width)
+		int x = touch.px * WindowInfo.Width / GSP_SCREEN_HEIGHT_BOTTOM;
+	 	int y = touch.py;
 		Pointer_SetPosition(0, x, y);
 	}
+	// Set starting position for camera movement
+	if (hidKeysDown() & KEY_TOUCH) {
+		cursorPrevX = touch.px;
+		cursorPrevY = touch.py;
+	}
 	
 	if (Input_RawMode) {	
-		circlePosition pos = { 0, 0 };
+		circlePosition pos;
 		hidCircleRead(&pos);
 		
 		// May not be exactly 0 on actual hardware
-		if (Math_AbsI(pos.dx) < 4) pos.dx = 0;
+		if (Math_AbsI(pos.dx) <= 4) pos.dx = 0;
-		if (Math_AbsI(pos.dy) < 4) pos.dy = 0;
+		if (Math_AbsI(pos.dy) <= 4) pos.dy = 0;
 		
 		Event_RaiseRawMove(&PointerEvents.RawMoved, -pos.dx / 32.0f, pos.dy / 32.0f);
 	}
 }
 
-static void Cursor_GetRawPos(int* x, int* y) {
+static void Cursor_DoSetVisible(cc_bool visible) { } // Makes no sense for 3DS
+void Cursor_SetPosition(int x, int y) { }            // Makes no sense for 3DS
+
+void Window_EnableRawMouse(void)  { Input_RawMode = true;  }
+void Window_DisableRawMouse(void) { Input_RawMode = false; }
+
+void Window_UpdateRawMouse(void)  {
+	if (!touchActive) return;
+	
 	touchPosition touch;
 	hidTouchRead(&touch);
-
+	Event_RaiseRawMove(&PointerEvents.RawMoved, 
-	*x = touch.px;
+				x - cursorPrevX, y - cursorPrevY);	
-	*y = touch.py;
+	cursorPrevX = x;
-}
+	cursorPrevY = y;
-
-static void Cursor_DoSetVisible(cc_bool visible) {
-	/* TODO implement */
-}
-
-void Cursor_SetPosition(int x, int y) {
-	/* TODO implement */
-}
-
-static void ShowDialogCore(const char* title, const char* msg) {
-	/* TODO implement */
-}
-
-cc_result Window_OpenFileDialog(const struct OpenFileDialogArgs* args) {
-	return ERR_NOT_SUPPORTED;
-}
-
-cc_result Window_SaveFileDialog(const struct SaveFileDialogArgs* args) {
-	return ERR_NOT_SUPPORTED;
 }
 
+/*########################################################################################################################*
+*------------------------------------------------------Framebuffer--------------------------------------------------------*
+*#########################################################################################################################*/
 static struct Bitmap fb_bmp;
 void Window_AllocFramebuffer(struct Bitmap* bmp) {
 	bmp->scan0 = (BitmapCol*)Mem_Alloc(bmp->width * bmp->height, 4, "window pixels");
@@ -186,6 +193,9 @@ void Window_FreeFramebuffer(struct Bitmap* bmp) {
 	/* TODO implement */
 }
 
+/*########################################################################################################################*
+*------------------------------------------------------Soft keyboard------------------------------------------------------*
+*#########################################################################################################################*/
 static void OnscreenTextChanged(const char* text) {
 	char tmpBuffer[NATIVE_STR_LEN];
 	cc_string tmp = String_FromArray(tmpBuffer);
@@ -224,7 +234,18 @@ void Window_OpenKeyboard(struct OpenKeyboardArgs* args) {
 void Window_SetKeyboardText(const cc_string* text) { }
 void Window_CloseKeyboard(void) { /* TODO implement */ }
 
-void Window_EnableRawMouse(void)  { DefaultEnableRawMouse();  }
+/*########################################################################################################################*
-void Window_UpdateRawMouse(void)  { DefaultUpdateRawMouse();  }
+*-------------------------------------------------------Misc/Other--------------------------------------------------------*
-void Window_DisableRawMouse(void) { DefaultDisableRawMouse(); }
+*#########################################################################################################################*/
+static void ShowDialogCore(const char* title, const char* msg) {
+	/* TODO implement */
+}
+
+cc_result Window_OpenFileDialog(const struct OpenFileDialogArgs* args) {
+	return ERR_NOT_SUPPORTED;
+}
+
+cc_result Window_SaveFileDialog(const struct SaveFileDialogArgs* args) {
+	return ERR_NOT_SUPPORTED;
+}
 #endif