From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 gfx/vr/gfxVR.cpp | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 gfx/vr/gfxVR.cpp

(limited to 'gfx/vr/gfxVR.cpp')

diff --git a/gfx/vr/gfxVR.cpp b/gfx/vr/gfxVR.cpp
new file mode 100644
index 000000000..c0babb4f8
--- /dev/null
+++ b/gfx/vr/gfxVR.cpp
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <math.h>
+
+#include "gfxVR.h"
+#ifdef MOZ_GAMEPAD
+#include "mozilla/dom/GamepadEventTypes.h"
+#include "mozilla/dom/GamepadBinding.h"
+#endif
+
+#ifndef M_PI
+# define M_PI 3.14159265358979323846
+#endif
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+Atomic<uint32_t> VRDisplayManager::sDisplayBase(0);
+Atomic<uint32_t> VRControllerManager::sControllerBase(0);
+
+/* static */ uint32_t
+VRDisplayManager::AllocateDisplayID()
+{
+  return ++sDisplayBase;
+}
+
+Matrix4x4
+VRFieldOfView::ConstructProjectionMatrix(float zNear, float zFar,
+                                         bool rightHanded) const
+{
+  float upTan = tan(upDegrees * M_PI / 180.0);
+  float downTan = tan(downDegrees * M_PI / 180.0);
+  float leftTan = tan(leftDegrees * M_PI / 180.0);
+  float rightTan = tan(rightDegrees * M_PI / 180.0);
+
+  float handednessScale = rightHanded ? -1.0 : 1.0;
+
+  float pxscale = 2.0f / (leftTan + rightTan);
+  float pxoffset = (leftTan - rightTan) * pxscale * 0.5;
+  float pyscale = 2.0f / (upTan + downTan);
+  float pyoffset = (upTan - downTan) * pyscale * 0.5;
+
+  Matrix4x4 mobj;
+  float *m = &mobj._11;
+
+  m[0*4+0] = pxscale;
+  m[2*4+0] = pxoffset * handednessScale;
+
+  m[1*4+1] = pyscale;
+  m[2*4+1] = -pyoffset * handednessScale;
+
+  m[2*4+2] = zFar / (zNear - zFar) * -handednessScale;
+  m[3*4+2] = (zFar * zNear) / (zNear - zFar);
+
+  m[2*4+3] = handednessScale;
+  m[3*4+3] = 0.0f;
+
+  return mobj;
+}
+
+/* static */ uint32_t
+VRControllerManager::AllocateControllerID()
+{
+  return ++sControllerBase;
+}
+
+void
+VRControllerManager::AddGamepad(const char* aID, uint32_t aMapping,
+                                uint32_t aNumButtons, uint32_t aNumAxes)
+{
+  dom::GamepadAdded a(NS_ConvertUTF8toUTF16(nsDependentCString(aID)), mControllerCount,
+                     aMapping, dom::GamepadServiceType::VR, aNumButtons,
+                     aNumAxes);
+
+  VRManager* vm = VRManager::Get();
+  MOZ_ASSERT(vm);
+  vm->NotifyGamepadChange<dom::GamepadAdded>(a);
+}
+
+void
+VRControllerManager::RemoveGamepad(uint32_t aIndex)
+{
+  dom::GamepadRemoved a(aIndex, dom::GamepadServiceType::VR);
+
+  VRManager* vm = VRManager::Get();
+  MOZ_ASSERT(vm);
+  vm->NotifyGamepadChange<dom::GamepadRemoved>(a);
+}
+
+void
+VRControllerManager::NewButtonEvent(uint32_t aIndex, uint32_t aButton,
+                                    bool aPressed)
+{
+  dom::GamepadButtonInformation a(aIndex, dom::GamepadServiceType::VR,
+                                  aButton, aPressed, aPressed ? 1.0L : 0.0L);
+
+  VRManager* vm = VRManager::Get();
+  MOZ_ASSERT(vm);
+  vm->NotifyGamepadChange<dom::GamepadButtonInformation>(a);
+}
+
+void
+VRControllerManager::NewAxisMove(uint32_t aIndex, uint32_t aAxis,
+                                 double aValue)
+{
+  dom::GamepadAxisInformation a(aIndex, dom::GamepadServiceType::VR,
+                                aAxis, aValue);
+
+  VRManager* vm = VRManager::Get();
+  MOZ_ASSERT(vm);
+  vm->NotifyGamepadChange<dom::GamepadAxisInformation>(a);
+}
+
+void
+VRControllerManager::NewPoseState(uint32_t aIndex,
+                                  const dom::GamepadPoseState& aPose)
+{
+  dom::GamepadPoseInformation a(aIndex, dom::GamepadServiceType::VR,
+                                aPose);
+
+  VRManager* vm = VRManager::Get();
+  MOZ_ASSERT(vm);
+  vm->NotifyGamepadChange<dom::GamepadPoseInformation>(a);
+}
-- 
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