Added SDL_HapticNumEffectsPlaying().

libsdl-org · Jul 10, 2008 · 7753d4c · 7753d4c
1 parent ace23db
commit 7753d4c
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Showing 4 changed files with 32 additions and 0 deletions.
diff --git a/include/SDL_haptic.h b/include/SDL_haptic.h
@@ -740,10 +740,25 @@ extern DECLSPEC void SDL_HapticClose(SDL_Haptic * haptic);
  *    \return The number of effects the haptic device can store or
  *            -1 on error.
  *
+ * \sa SDL_HapticNumEffectsPlaying
  * \sa SDL_HapticQuery
  */
 extern DECLSPEC int SDL_HapticNumEffects(SDL_Haptic * haptic);
 
+/**
+ * \fn int SDL_HapticNumEffectsPlaying(SDL_Haptic * haptic)
+ *
+ * \brief Returns the number of effects a haptic device can play at the same time.
+ *
+ *    \param haptic The haptic device to query maximum playing effect.s
+ *    \return The number of effects the haptic device can play at the same time
+ *            or -1 on error.
+ *
+ * \sa SDL_HapticNumEffects
+ * \sa SDL_HapticQuery
+ */
+extern DECLSPEC int SDL_HapticNumEffectsPlaying(SDL_Haptic * haptic);
+
 /**
  * \fn unsigned int SDL_HapticQuery(SDL_Haptic * haptic)
  *

diff --git a/src/haptic/SDL_haptic.c b/src/haptic/SDL_haptic.c
@@ -356,6 +356,21 @@ SDL_HapticNumEffects(SDL_Haptic * haptic)
    return haptic->neffects;
 }
 
+
+/*
+ * Returns the number of effects a haptic device can play.
+ */
+int
+SDL_HapticNumEffectsPlaying(SDL_Haptic * haptic)
+{
+   if (!ValidHaptic(&haptic)) {
+      return -1;
+   }
+
+   return haptic->nplaying;
+}
+
+
 /*
  * Returns supported effects by the device.
  */

diff --git a/src/haptic/SDL_syshaptic.h b/src/haptic/SDL_syshaptic.h
@@ -47,6 +47,7 @@ struct _SDL_Haptic
 
    struct haptic_effect *effects; /* Allocated effects */
    int neffects; /* Maximum amount of effects */
+   int nplaying; /* Maximum amount of effects to play at the same time */
    unsigned int supported; /* Supported effects */
 
    struct haptic_hwdata *hwdata; /* Driver dependent */

diff --git a/src/haptic/linux/SDL_syshaptic.c b/src/haptic/linux/SDL_syshaptic.c
@@ -260,6 +260,7 @@ SDL_SYS_HapticOpenFromFD(SDL_Haptic * haptic, int fd)
       SDL_SetError("Haptic: Unable to query device memory: %s", strerror(errno));
       goto open_err;
    }
+   haptic->nplaying = haptic->neffects; /* Linux makes no distinction. */
    haptic->effects = (struct haptic_effect *)
          SDL_malloc(sizeof(struct haptic_effect) * haptic->neffects);
    if (haptic->effects == NULL) {