Haptic: Fix clamping bugs on Windows, by using the Darwin haptics code.

Thanks, Elias!

Partially fixes Bugzilla #2686.

src/haptic/windows/SDL_dinputhaptic.c

@@ -602,7 +602,10 @@ SDL_SYS_SetDirection(DIEFFECT * effect, SDL_HapticDirection * dir, int naxes)
     }
 }
 
-#define CONVERT(x)   (((x) > 0x7FFF) ? 10000 : ((x)*10000) / 0x7FFF)
+/* Clamps and converts. */
+#define CCONVERT(x)   (((x) > 0x7FFF) ? 10000 : ((x)*10000) / 0x7FFF)
+/* Just converts. */
+#define CONVERT(x)    (((x)*10000) / 0x7FFF)
 /*
  * Creates the DIEFFECT from a SDL_HapticEffect.
  */
@@ -689,9 +692,9 @@ SDL_SYS_ToDIEFFECT(SDL_Haptic * haptic, DIEFFECT * dest,
             SDL_free(dest->lpEnvelope);
             dest->lpEnvelope = NULL;
         } else {
-            envelope->dwAttackLevel = CONVERT(hap_constant->attack_level);
+            envelope->dwAttackLevel = CCONVERT(hap_constant->attack_level);
             envelope->dwAttackTime = hap_constant->attack_length * 1000;
-            envelope->dwFadeLevel = CONVERT(hap_constant->fade_level);
+            envelope->dwFadeLevel = CCONVERT(hap_constant->fade_level);
             envelope->dwFadeTime = hap_constant->fade_length * 1000;
         }
 
@@ -736,9 +739,9 @@ SDL_SYS_ToDIEFFECT(SDL_Haptic * haptic, DIEFFECT * dest,
             SDL_free(dest->lpEnvelope);
             dest->lpEnvelope = NULL;
         } else {
-            envelope->dwAttackLevel = CONVERT(hap_periodic->attack_level);
+            envelope->dwAttackLevel = CCONVERT(hap_periodic->attack_level);
             envelope->dwAttackTime = hap_periodic->attack_length * 1000;
-            envelope->dwFadeLevel = CONVERT(hap_periodic->fade_level);
+            envelope->dwFadeLevel = CCONVERT(hap_periodic->fade_level);
             envelope->dwFadeTime = hap_periodic->fade_length * 1000;
         }
 
@@ -763,10 +766,10 @@ SDL_SYS_ToDIEFFECT(SDL_Haptic * haptic, DIEFFECT * dest,
             condition[i].lNegativeCoefficient =
                 CONVERT(hap_condition->left_coeff[i]);
             condition[i].dwPositiveSaturation =
-                CONVERT(hap_condition->right_sat[i] / 2);
+                CCONVERT(hap_condition->right_sat[i] / 2);
             condition[i].dwNegativeSaturation =
-                CONVERT(hap_condition->left_sat[i] / 2);
-            condition[i].lDeadBand = CONVERT(hap_condition->deadband[i] / 2);
+                CCONVERT(hap_condition->left_sat[i] / 2);
+            condition[i].lDeadBand = CCONVERT(hap_condition->deadband[i] / 2);
         }
         dest->cbTypeSpecificParams = sizeof(DICONDITION) * dest->cAxes;
         dest->lpvTypeSpecificParams = condition;
@@ -819,9 +822,9 @@ SDL_SYS_ToDIEFFECT(SDL_Haptic * haptic, DIEFFECT * dest,
             SDL_free(dest->lpEnvelope);
             dest->lpEnvelope = NULL;
         } else {
-            envelope->dwAttackLevel = CONVERT(hap_ramp->attack_level);
+            envelope->dwAttackLevel = CCONVERT(hap_ramp->attack_level);
             envelope->dwAttackTime = hap_ramp->attack_length * 1000;
-            envelope->dwFadeLevel = CONVERT(hap_ramp->fade_level);
+            envelope->dwFadeLevel = CCONVERT(hap_ramp->fade_level);
             envelope->dwFadeTime = hap_ramp->fade_length * 1000;
         }
 
@@ -842,7 +845,7 @@ SDL_SYS_ToDIEFFECT(SDL_Haptic * haptic, DIEFFECT * dest,
         custom->rglForceData =
             SDL_malloc(sizeof(LONG) * custom->cSamples * custom->cChannels);
         for (i = 0; i < hap_custom->samples * hap_custom->channels; i++) {      /* Copy data. */
-            custom->rglForceData[i] = CONVERT(hap_custom->data[i]);
+            custom->rglForceData[i] = CCONVERT(hap_custom->data[i]);
         }
         dest->cbTypeSpecificParams = sizeof(DICUSTOMFORCE);
         dest->lpvTypeSpecificParams = custom;
@@ -864,9 +867,9 @@ SDL_SYS_ToDIEFFECT(SDL_Haptic * haptic, DIEFFECT * dest,
             SDL_free(dest->lpEnvelope);
             dest->lpEnvelope = NULL;
         } else {
-            envelope->dwAttackLevel = CONVERT(hap_custom->attack_level);
+            envelope->dwAttackLevel = CCONVERT(hap_custom->attack_level);
             envelope->dwAttackTime = hap_custom->attack_length * 1000;
-            envelope->dwFadeLevel = CONVERT(hap_custom->fade_level);
+            envelope->dwFadeLevel = CCONVERT(hap_custom->fade_level);
             envelope->dwFadeTime = hap_custom->fade_length * 1000;
         }