gecko-dev/gfx/vr/gfxVR.cpp

95 строки
2.2 KiB
C++

/* -*- 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 "prlink.h"
#include "prmem.h"
#include "prenv.h"
#include "nsString.h"
#include "gfxPrefs.h"
#include "gfxVR.h"
#if defined(XP_WIN)
#include "gfxVROculus.h"
#endif
#if defined(XP_WIN) || defined(XP_MACOSX) || defined(XP_LINUX)
#include "gfxVROculus050.h"
#endif
#include "gfxVRCardboard.h"
#include "mozilla/unused.h"
#include "mozilla/layers/Compositor.h"
#include "mozilla/layers/TextureHost.h"
#ifndef M_PI
# define M_PI 3.14159265358979323846
#endif
using namespace mozilla;
using namespace mozilla::gfx;
Atomic<uint32_t> VRHMDManager::sDeviceBase(0);
VRHMDInfo::VRHMDInfo(VRHMDType aType, bool aUseMainThreadOrientation)
{
MOZ_COUNT_CTOR(VRHMDInfo);
mDeviceInfo.mType = aType;
mDeviceInfo.mDeviceID = VRHMDManager::AllocateDeviceID();
mDeviceInfo.mUseMainThreadOrientation = aUseMainThreadOrientation;
}
VRHMDInfo::~VRHMDInfo()
{
MOZ_COUNT_DTOR(VRHMDInfo);
}
/* static */ uint32_t
VRHMDManager::AllocateDeviceID()
{
return ++sDeviceBase;
}
VRHMDRenderingSupport::RenderTargetSet::RenderTargetSet()
{
}
VRHMDRenderingSupport::RenderTargetSet::~RenderTargetSet()
{
}
Matrix4x4
VRFieldOfView::ConstructProjectionMatrix(float zNear, float zFar, bool rightHanded)
{
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;
}