1 files changed, 186 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/video/vita/SDL_vitatouch.c b/contrib/SDL-3.2.8/src/video/vita/SDL_vitatouch.c
new file mode 100644
index 0000000..ac6f764
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/video/vita/SDL_vitatouch.c
@@ -0,0 +1,186 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_VIDEO_DRIVER_VITA
+
+#include <psp2/kernel/processmgr.h>
+#include <psp2/touch.h>
+
+#include "SDL_vitavideo.h"
+#include "SDL_vitatouch.h"
+#include "../../events/SDL_mouse_c.h"
+#include "../../events/SDL_touch_c.h"
+
+SceTouchData touch_old[SCE_TOUCH_PORT_MAX_NUM];
+SceTouchData touch[SCE_TOUCH_PORT_MAX_NUM];
+
+SDL_FRect area_info[SCE_TOUCH_PORT_MAX_NUM];
+
+struct
+{
+    float min;
+    float range;
+} force_info[SCE_TOUCH_PORT_MAX_NUM];
+
+static bool disableFrontPoll;
+static bool disableBackPoll;
+
+void VITA_InitTouch(void)
+{
+    disableFrontPoll = !SDL_GetHintBoolean(SDL_HINT_VITA_ENABLE_FRONT_TOUCH, true);
+    disableBackPoll = !SDL_GetHintBoolean(SDL_HINT_VITA_ENABLE_BACK_TOUCH, true);
+
+    sceTouchSetSamplingState(SCE_TOUCH_PORT_FRONT, SCE_TOUCH_SAMPLING_STATE_START);
+    sceTouchSetSamplingState(SCE_TOUCH_PORT_BACK, SCE_TOUCH_SAMPLING_STATE_START);
+    sceTouchEnableTouchForce(SCE_TOUCH_PORT_FRONT);
+    sceTouchEnableTouchForce(SCE_TOUCH_PORT_BACK);
+
+    for (int port = 0; port < SCE_TOUCH_PORT_MAX_NUM; port++) {
+        SceTouchPanelInfo panelinfo;
+        sceTouchGetPanelInfo(port, &panelinfo);
+
+        area_info[port].x = (float)panelinfo.minAaX;
+        area_info[port].y = (float)panelinfo.minAaY;
+        area_info[port].w = (float)(panelinfo.maxAaX - panelinfo.minAaX);
+        area_info[port].h = (float)(panelinfo.maxAaY - panelinfo.minAaY);
+
+        force_info[port].min = (float)panelinfo.minForce;
+        force_info[port].range = (float)(panelinfo.maxForce - panelinfo.minForce);
+    }
+
+    // Support passing both front and back touch devices in events
+    SDL_AddTouch(1, SDL_TOUCH_DEVICE_DIRECT, "Front");
+    SDL_AddTouch(2, SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE, "Back");
+}
+
+void VITA_QuitTouch(void)
+{
+    sceTouchDisableTouchForce(SCE_TOUCH_PORT_FRONT);
+    sceTouchDisableTouchForce(SCE_TOUCH_PORT_BACK);
+}
+
+void VITA_PollTouch(void)
+{
+    SDL_TouchID touch_id;
+    SDL_FingerID finger_id;
+    int port;
+
+    // We skip polling touch if no window is created
+    if (!Vita_Window) {
+        return;
+    }
+
+    SDL_memcpy(touch_old, touch, sizeof(touch_old));
+
+    for (port = 0; port < SCE_TOUCH_PORT_MAX_NUM; port++) {
+        /** Skip polling of Touch Device if hint is set **/
+        if (((port == 0) && disableFrontPoll) || ((port == 1) && disableBackPoll)) {
+            continue;
+        }
+        sceTouchPeek(port, &touch[port], 1);
+
+        touch_id = (SDL_TouchID)(port + 1);
+
+        if (touch[port].reportNum > 0) {
+            for (int i = 0; i < touch[port].reportNum; i++) {
+                // adjust coordinates and forces to return normalized values
+                // for the front, screen area is used as a reference (for direct touch)
+                // e.g. touch_x = 1.0 corresponds to screen_x = 960
+                // for the back panel, the active touch area is used as reference
+                float x = 0;
+                float y = 0;
+                float force = (touch[port].report[i].force - force_info[port].min) / force_info[port].range;
+                int finger_down = 0;
+
+                if (touch_old[port].reportNum > 0) {
+                    for (int j = 0; j < touch_old[port].reportNum; j++) {
+                        if (touch[port].report[i].id == touch_old[port].report[j].id) {
+                            finger_down = 1;
+                        }
+                    }
+                }
+
+                VITA_ConvertTouchXYToSDLXY(&x, &y, touch[port].report[i].x, touch[port].report[i].y, port);
+                finger_id = (SDL_FingerID)(touch[port].report[i].id + 1);
+
+                // Skip if finger was already previously down
+                if (!finger_down) {
+                    // Send an initial touch
+                    SDL_SendTouch(0, touch_id, finger_id, Vita_Window, SDL_EVENT_FINGER_DOWN, x, y, force);
+                }
+
+                // Always send the motion
+                SDL_SendTouchMotion(0, touch_id, finger_id, Vita_Window, x, y, force);
+            }
+        }
+
+        // some fingers might have been let go
+        if (touch_old[port].reportNum > 0) {
+            for (int i = 0; i < touch_old[port].reportNum; i++) {
+                int finger_up = 1;
+                if (touch[port].reportNum > 0) {
+                    for (int j = 0; j < touch[port].reportNum; j++) {
+                        if (touch[port].report[j].id == touch_old[port].report[i].id) {
+                            finger_up = 0;
+                        }
+                    }
+                }
+                if (finger_up == 1) {
+                    float x = 0;
+                    float y = 0;
+                    float force = (touch_old[port].report[i].force - force_info[port].min) / force_info[port].range;
+                    VITA_ConvertTouchXYToSDLXY(&x, &y, touch_old[port].report[i].x, touch_old[port].report[i].y, port);
+                    finger_id = (SDL_FingerID)(touch_old[port].report[i].id + 1);
+                    // Finger released from screen
+                    SDL_SendTouch(0, touch_id, finger_id, Vita_Window, SDL_EVENT_FINGER_UP, x, y, force);
+                }
+            }
+        }
+    }
+}
+
+void VITA_ConvertTouchXYToSDLXY(float *sdl_x, float *sdl_y, int vita_x, int vita_y, int port)
+{
+    float x, y;
+
+    if (area_info[port].w <= 1) {
+        x = 0.5f;
+    } else {
+        x = (vita_x - area_info[port].x) / (area_info[port].w - 1);
+    }
+    if (area_info[port].h <= 1) {
+        y = 0.5f;
+    } else {
+        y = (vita_y - area_info[port].y) / (area_info[port].h - 1);
+    }
+
+    x = SDL_max(x, 0.0f);
+    x = SDL_min(x, 1.0f);
+
+    y = SDL_max(y, 0.0f);
+    y = SDL_min(y, 1.0f);
+
+    *sdl_x = x;
+    *sdl_y = y;
+}
+
+#endif // SDL_VIDEO_DRIVER_VITA