1 files changed, 277 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/joystick/psp/SDL_sysjoystick.c b/contrib/SDL-3.2.8/src/joystick/psp/SDL_sysjoystick.c
new file mode 100644
index 0000000..8a0154c
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/joystick/psp/SDL_sysjoystick.c
@@ -0,0 +1,277 @@
+/*
+  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_JOYSTICK_PSP
+
+// This is the PSP implementation of the SDL joystick API
+#include <pspctrl.h>
+
+#include <stdio.h> // For the definition of NULL
+#include <stdlib.h>
+
+#include "../SDL_sysjoystick.h"
+#include "../SDL_joystick_c.h"
+
+// Current pad state
+static SceCtrlData pad = { .Lx = 0, .Ly = 0, .Buttons = 0 };
+static const enum PspCtrlButtons button_map[] = {
+    PSP_CTRL_TRIANGLE, PSP_CTRL_CIRCLE, PSP_CTRL_CROSS, PSP_CTRL_SQUARE,
+    PSP_CTRL_LTRIGGER, PSP_CTRL_RTRIGGER,
+    PSP_CTRL_DOWN, PSP_CTRL_LEFT, PSP_CTRL_UP, PSP_CTRL_RIGHT,
+    PSP_CTRL_SELECT, PSP_CTRL_START, PSP_CTRL_HOME, PSP_CTRL_HOLD
+};
+static int analog_map[256]; // Map analog inputs to -32768 -> 32767
+
+// 4 points define the bezier-curve.
+static SDL_Point a = { 0, 0 };
+static SDL_Point b = { 50, 0 };
+static SDL_Point c = { 78, 32767 };
+static SDL_Point d = { 128, 32767 };
+
+// simple linear interpolation between two points
+static SDL_INLINE void lerp(SDL_Point *dest, const SDL_Point *pt_a, const SDL_Point *pt_b, float t)
+{
+    dest->x = pt_a->x + (int)((pt_b->x - pt_a->x) * t);
+    dest->y = pt_a->y + (int)((pt_b->y - pt_a->y) * t);
+}
+
+// evaluate a point on a bezier-curve. t goes from 0 to 1.0
+static int calc_bezier_y(float t)
+{
+    SDL_Point ab, bc, cd, abbc, bccd, dest;
+    lerp(&ab, &a, &b, t);         // point between a and b
+    lerp(&bc, &b, &c, t);         // point between b and c
+    lerp(&cd, &c, &d, t);         // point between c and d
+    lerp(&abbc, &ab, &bc, t);     // point between ab and bc
+    lerp(&bccd, &bc, &cd, t);     // point between bc and cd
+    lerp(&dest, &abbc, &bccd, t); // point on the bezier-curve
+    return dest.y;
+}
+
+/* Function to scan the system for joysticks.
+ * Joystick 0 should be the system default joystick.
+ * It should return number of joysticks, or -1 on an unrecoverable fatal error.
+ */
+static bool PSP_JoystickInit(void)
+{
+    int i;
+
+    // Setup input
+    sceCtrlSetSamplingCycle(0);
+    sceCtrlSetSamplingMode(PSP_CTRL_MODE_ANALOG);
+
+    /* Create an accurate map from analog inputs (0 to 255)
+       to SDL joystick positions (-32768 to 32767) */
+    for (i = 0; i < 128; i++) {
+        float t = (float)i / 127.0f;
+        analog_map[i + 128] = calc_bezier_y(t);
+        analog_map[127 - i] = -1 * analog_map[i + 128];
+    }
+
+    SDL_PrivateJoystickAdded(1);
+
+    return 1;
+}
+
+static int PSP_JoystickGetCount(void)
+{
+    return 1;
+}
+
+static void PSP_JoystickDetect(void)
+{
+}
+
+static bool PSP_JoystickIsDevicePresent(Uint16 vendor_id, Uint16 product_id, Uint16 version, const char *name)
+{
+    // We don't override any other drivers
+    return false;
+}
+
+// Function to get the device-dependent name of a joystick
+static const char *PSP_JoystickGetDeviceName(int device_index)
+{
+    if (device_index == 0) {
+        return "PSP builtin joypad";
+    }
+
+    SDL_SetError("No joystick available with that index");
+    return NULL;
+}
+
+static const char *PSP_JoystickGetDevicePath(int index)
+{
+    return NULL;
+}
+
+static int PSP_JoystickGetDeviceSteamVirtualGamepadSlot(int device_index)
+{
+    return -1;
+}
+
+static int PSP_JoystickGetDevicePlayerIndex(int device_index)
+{
+    return -1;
+}
+
+static void PSP_JoystickSetDevicePlayerIndex(int device_index, int player_index)
+{
+}
+
+static SDL_GUID PSP_JoystickGetDeviceGUID(int device_index)
+{
+    // the GUID is just the name for now
+    const char *name = PSP_JoystickGetDeviceName(device_index);
+    return SDL_CreateJoystickGUIDForName(name);
+}
+
+// Function to perform the mapping from device index to the instance id for this index
+static SDL_JoystickID PSP_JoystickGetDeviceInstanceID(int device_index)
+{
+    return device_index + 1;
+}
+
+/* Function to open a joystick for use.
+   The joystick to open is specified by the device index.
+   This should fill the nbuttons and naxes fields of the joystick structure.
+   It returns 0, or -1 if there is an error.
+ */
+static bool PSP_JoystickOpen(SDL_Joystick *joystick, int device_index)
+{
+    joystick->nbuttons = SDL_arraysize(button_map);
+    joystick->naxes = 2;
+    joystick->nhats = 0;
+
+    return true;
+}
+
+static bool PSP_JoystickRumble(SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)
+{
+    return SDL_Unsupported();
+}
+
+static bool PSP_JoystickRumbleTriggers(SDL_Joystick *joystick, Uint16 left_rumble, Uint16 right_rumble)
+{
+    return SDL_Unsupported();
+}
+
+static bool PSP_JoystickSetLED(SDL_Joystick *joystick, Uint8 red, Uint8 green, Uint8 blue)
+{
+    return SDL_Unsupported();
+}
+
+static bool PSP_JoystickSendEffect(SDL_Joystick *joystick, const void *data, int size)
+{
+    return SDL_Unsupported();
+}
+
+static bool PSP_JoystickSetSensorsEnabled(SDL_Joystick *joystick, bool enabled)
+{
+    return SDL_Unsupported();
+}
+
+/* Function to update the state of a joystick - called as a device poll.
+ * This function shouldn't update the joystick structure directly,
+ * but instead should call SDL_PrivateJoystick*() to deliver events
+ * and update joystick device state.
+ */
+static void PSP_JoystickUpdate(SDL_Joystick *joystick)
+{
+    int i;
+    enum PspCtrlButtons buttons;
+    enum PspCtrlButtons changed;
+    unsigned char x, y;
+    static enum PspCtrlButtons old_buttons = 0;
+    static unsigned char old_x = 0, old_y = 0;
+    Uint64 timestamp = SDL_GetTicksNS();
+
+    if (sceCtrlPeekBufferPositive(&pad, 1) <= 0) {
+        return;
+    }
+    buttons = pad.Buttons;
+    x = pad.Lx;
+    y = pad.Ly;
+
+    // Axes
+    if (old_x != x) {
+        SDL_SendJoystickAxis(timestamp, joystick, 0, analog_map[x]);
+        old_x = x;
+    }
+    if (old_y != y) {
+        SDL_SendJoystickAxis(timestamp, joystick, 1, analog_map[y]);
+        old_y = y;
+    }
+
+    // Buttons
+    changed = old_buttons ^ buttons;
+    old_buttons = buttons;
+    if (changed) {
+        for (i = 0; i < SDL_arraysize(button_map); i++) {
+            if (changed & button_map[i]) {
+                bool down = ((buttons & button_map[i]) != 0);
+                SDL_SendJoystickButton(timestamp,
+                    joystick, i, down);
+            }
+        }
+    }
+}
+
+// Function to close a joystick after use
+static void PSP_JoystickClose(SDL_Joystick *joystick)
+{
+}
+
+// Function to perform any system-specific joystick related cleanup
+static void PSP_JoystickQuit(void)
+{
+}
+
+static bool PSP_JoystickGetGamepadMapping(int device_index, SDL_GamepadMapping *out)
+{
+    return false;
+}
+
+SDL_JoystickDriver SDL_PSP_JoystickDriver = {
+    PSP_JoystickInit,
+    PSP_JoystickGetCount,
+    PSP_JoystickDetect,
+    PSP_JoystickIsDevicePresent,
+    PSP_JoystickGetDeviceName,
+    PSP_JoystickGetDevicePath,
+    PSP_JoystickGetDeviceSteamVirtualGamepadSlot,
+    PSP_JoystickGetDevicePlayerIndex,
+    PSP_JoystickSetDevicePlayerIndex,
+    PSP_JoystickGetDeviceGUID,
+    PSP_JoystickGetDeviceInstanceID,
+    PSP_JoystickOpen,
+    PSP_JoystickRumble,
+    PSP_JoystickRumbleTriggers,
+    PSP_JoystickSetLED,
+    PSP_JoystickSendEffect,
+    PSP_JoystickSetSensorsEnabled,
+    PSP_JoystickUpdate,
+    PSP_JoystickClose,
+    PSP_JoystickQuit,
+    PSP_JoystickGetGamepadMapping
+};
+
+#endif // SDL_JOYSTICK_PSP