Add SDL2.0.1-3742e768b536.

Note: using the same folder for future updates.
2026-08-18 19:54:37 +02:00 · 2014-02-14 18:56:29 +01:00
parent 320d1f0027
commit 001744190b
1777 changed files with 462972 additions and 0 deletions
@@ -0,0 +1,362 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2014 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"
+
+/* General touch handling code for SDL */
+
+#include "SDL_assert.h"
+#include "SDL_events.h"
+#include "SDL_events_c.h"
+
+
+static int SDL_num_touch = 0;
+static SDL_Touch **SDL_touchDevices = NULL;
+
+
+/* Public functions */
+int
+SDL_TouchInit(void)
+{
+    return (0);
+}
+
+int
+SDL_GetNumTouchDevices(void)
+{
+    return SDL_num_touch;
+}
+
+SDL_TouchID
+SDL_GetTouchDevice(int index)
+{
+    if (index < 0 || index >= SDL_num_touch) {
+        SDL_SetError("Unknown touch device");
+        return 0;
+    }
+    return SDL_touchDevices[index]->id;
+}
+
+static int
+SDL_GetTouchIndex(SDL_TouchID id)
+{
+    int index;
+    SDL_Touch *touch;
+
+    for (index = 0; index < SDL_num_touch; ++index) {
+        touch = SDL_touchDevices[index];
+        if (touch->id == id) {
+            return index;
+        }
+    }
+    return -1;
+}
+
+SDL_Touch *
+SDL_GetTouch(SDL_TouchID id)
+{
+    int index = SDL_GetTouchIndex(id);
+    if (index < 0 || index >= SDL_num_touch) {
+        SDL_SetError("Unknown touch device");
+        return NULL;
+    }
+    return SDL_touchDevices[index];
+}
+
+static int
+SDL_GetFingerIndex(const SDL_Touch * touch, SDL_FingerID fingerid)
+{
+    int index;
+    for (index = 0; index < touch->num_fingers; ++index) {
+        if (touch->fingers[index]->id == fingerid) {
+            return index;
+        }
+    }
+    return -1;
+}
+
+SDL_Finger *
+SDL_GetFinger(const SDL_Touch * touch, SDL_FingerID id)
+{
+    int index = SDL_GetFingerIndex(touch, id);
+    if (index < 0 || index >= touch->num_fingers) {
+        return NULL;
+    }
+    return touch->fingers[index];
+}
+
+int
+SDL_GetNumTouchFingers(SDL_TouchID touchID)
+{
+    SDL_Touch *touch = SDL_GetTouch(touchID);
+    if (touch) {
+        return touch->num_fingers;
+    }
+    return 0;
+}
+
+SDL_Finger *
+SDL_GetTouchFinger(SDL_TouchID touchID, int index)
+{
+    SDL_Touch *touch = SDL_GetTouch(touchID);
+    if (!touch) {
+        return NULL;
+    }
+    if (index < 0 || index >= touch->num_fingers) {
+        SDL_SetError("Unknown touch finger");
+        return NULL;
+    }
+    return touch->fingers[index];
+}
+
+int
+SDL_AddTouch(SDL_TouchID touchID, const char *name)
+{
+    SDL_Touch **touchDevices;
+    int index;
+
+    index = SDL_GetTouchIndex(touchID);
+    if (index >= 0) {
+        return index;
+    }
+
+    /* Add the touch to the list of touch */
+    touchDevices = (SDL_Touch **) SDL_realloc(SDL_touchDevices,
+                                      (SDL_num_touch + 1) * sizeof(*touchDevices));
+    if (!touchDevices) {
+        return SDL_OutOfMemory();
+    }
+
+    SDL_touchDevices = touchDevices;
+    index = SDL_num_touch++;
+
+    SDL_touchDevices[index] = (SDL_Touch *) SDL_malloc(sizeof(*SDL_touchDevices[index]));
+    if (!SDL_touchDevices[index]) {
+        return SDL_OutOfMemory();
+    }
+
+    /* we're setting the touch properties */
+    SDL_touchDevices[index]->id = touchID;
+    SDL_touchDevices[index]->num_fingers = 0;
+    SDL_touchDevices[index]->max_fingers = 0;
+    SDL_touchDevices[index]->fingers = NULL;
+
+    /* Record this touch device for gestures */
+    /* We could do this on the fly in the gesture code if we wanted */
+    SDL_GestureAddTouch(touchID);
+
+    return index;
+}
+
+static int
+SDL_AddFinger(SDL_Touch *touch, SDL_FingerID fingerid, float x, float y, float pressure)
+{
+    SDL_Finger *finger;
+
+    if (touch->num_fingers == touch->max_fingers) {
+        SDL_Finger **new_fingers;
+        new_fingers = (SDL_Finger **)SDL_realloc(touch->fingers, (touch->max_fingers+1)*sizeof(*touch->fingers));
+        if (!new_fingers) {
+            return SDL_OutOfMemory();
+        }
+        touch->fingers = new_fingers;
+        touch->fingers[touch->max_fingers] = (SDL_Finger *)SDL_malloc(sizeof(*finger));
+        if (!touch->fingers[touch->max_fingers]) {
+            return SDL_OutOfMemory();
+        }
+        touch->max_fingers++;
+    }
+
+    finger = touch->fingers[touch->num_fingers++];
+    finger->id = fingerid;
+    finger->x = x;
+    finger->y = y;
+    finger->pressure = pressure;
+    return 0;
+}
+
+static int
+SDL_DelFinger(SDL_Touch* touch, SDL_FingerID fingerid)
+{
+    SDL_Finger *temp;
+
+    int index = SDL_GetFingerIndex(touch, fingerid);
+    if (index < 0) {
+        return -1;
+    }
+
+    touch->num_fingers--;
+    temp = touch->fingers[index];
+    touch->fingers[index] = touch->fingers[touch->num_fingers];
+    touch->fingers[touch->num_fingers] = temp;
+    return 0;
+}
+
+int
+SDL_SendTouch(SDL_TouchID id, SDL_FingerID fingerid,
+              SDL_bool down, float x, float y, float pressure)
+{
+    int posted;
+    SDL_Finger *finger;
+
+    SDL_Touch* touch = SDL_GetTouch(id);
+    if (!touch) {
+        return -1;
+    }
+
+    finger = SDL_GetFinger(touch, fingerid);
+    if (down) {
+        if (finger) {
+            /* This finger is already down */
+            return 0;
+        }
+
+        if (SDL_AddFinger(touch, fingerid, x, y, pressure) < 0) {
+            return 0;
+        }
+
+        posted = 0;
+        if (SDL_GetEventState(SDL_FINGERDOWN) == SDL_ENABLE) {
+            SDL_Event event;
+            event.tfinger.type = SDL_FINGERDOWN;
+            event.tfinger.touchId = id;
+            event.tfinger.fingerId = fingerid;
+            event.tfinger.x = x;
+            event.tfinger.y = y;
+            event.tfinger.dx = 0;
+            event.tfinger.dy = 0;
+            event.tfinger.pressure = pressure;
+            posted = (SDL_PushEvent(&event) > 0);
+        }
+    } else {
+        if (!finger) {
+            /* This finger is already up */
+            return 0;
+        }
+
+        posted = 0;
+        if (SDL_GetEventState(SDL_FINGERUP) == SDL_ENABLE) {
+            SDL_Event event;
+            event.tfinger.type = SDL_FINGERUP;
+            event.tfinger.touchId =  id;
+            event.tfinger.fingerId = fingerid;
+            /* I don't trust the coordinates passed on fingerUp */
+            event.tfinger.x = finger->x;
+            event.tfinger.y = finger->y;
+            event.tfinger.dx = 0;
+            event.tfinger.dy = 0;
+            event.tfinger.pressure = pressure;
+            posted = (SDL_PushEvent(&event) > 0);
+        }
+
+        SDL_DelFinger(touch, fingerid);
+    }
+    return posted;
+}
+
+int
+SDL_SendTouchMotion(SDL_TouchID id, SDL_FingerID fingerid,
+                    float x, float y, float pressure)
+{
+    SDL_Touch *touch;
+    SDL_Finger *finger;
+    int posted;
+    float xrel, yrel, prel;
+
+    touch = SDL_GetTouch(id);
+    if (!touch) {
+        return -1;
+    }
+
+    finger = SDL_GetFinger(touch,fingerid);
+    if (!finger) {
+        return SDL_SendTouch(id, fingerid, SDL_TRUE, x, y, pressure);
+    }
+
+    xrel = x - finger->x;
+    yrel = y - finger->y;
+    prel = pressure - finger->pressure;
+
+    /* Drop events that don't change state */
+    if (!xrel && !yrel && !prel) {
+#if 0
+        printf("Touch event didn't change state - dropped!\n");
+#endif
+        return 0;
+    }
+
+    /* Update internal touch coordinates */
+    finger->x = x;
+    finger->y = y;
+    finger->pressure = pressure;
+
+    /* Post the event, if desired */
+    posted = 0;
+    if (SDL_GetEventState(SDL_FINGERMOTION) == SDL_ENABLE) {
+        SDL_Event event;
+        event.tfinger.type = SDL_FINGERMOTION;
+        event.tfinger.touchId = id;
+        event.tfinger.fingerId = fingerid;
+        event.tfinger.x = x;
+        event.tfinger.y = y;
+        event.tfinger.dx = xrel;
+        event.tfinger.dy = yrel;
+        event.tfinger.pressure = pressure;
+        posted = (SDL_PushEvent(&event) > 0);
+    }
+    return posted;
+}
+
+void
+SDL_DelTouch(SDL_TouchID id)
+{
+    int i;
+    int index = SDL_GetTouchIndex(id);
+    SDL_Touch *touch = SDL_GetTouch(id);
+
+    if (!touch) {
+        return;
+    }
+
+    for (i = 0; i < touch->max_fingers; ++i) {
+        SDL_free(touch->fingers[i]);
+    }
+    SDL_free(touch->fingers);
+    SDL_free(touch);
+
+    SDL_num_touch--;
+    SDL_touchDevices[index] = SDL_touchDevices[SDL_num_touch];
+}
+
+void
+SDL_TouchQuit(void)
+{
+    int i;
+
+    for (i = SDL_num_touch; i--; ) {
+        SDL_DelTouch(SDL_touchDevices[i]->id);
+    }
+    SDL_assert(SDL_num_touch == 0);
+
+    SDL_free(SDL_touchDevices);
+    SDL_touchDevices = NULL;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */