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/*
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
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