From 7504ca8ab4b0a145488f03c51a0f78ffd5682174 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Mon, 26 Nov 2018 16:41:20 +0100
Subject: Remove VR hardware support.

This resolves #881
---
 dom/canvas/WebGLContext.cpp | 79 ---------------------------------------------
 dom/canvas/WebGLContext.h   |  3 --
 2 files changed, 82 deletions(-)

(limited to 'dom/canvas')

diff --git a/dom/canvas/WebGLContext.cpp b/dom/canvas/WebGLContext.cpp
index 14bc7e3e3..e2e05e5fd 100644
--- a/dom/canvas/WebGLContext.cpp
+++ b/dom/canvas/WebGLContext.cpp
@@ -47,7 +47,6 @@
 #include "nsSVGEffects.h"
 #include "prenv.h"
 #include "ScopedGLHelpers.h"
-#include "VRManagerChild.h"
 #include "mozilla/layers/TextureClientSharedSurface.h"
 
 // Local
@@ -2239,84 +2238,6 @@ WebGLContext::GetUnpackSize(bool isFunc3D, uint32_t width, uint32_t height,
     return totalBytes;
 }
 
-already_AddRefed<layers::SharedSurfaceTextureClient>
-WebGLContext::GetVRFrame()
-{
-    if (!mLayerIsMirror) {
-        /**
-         * Do not allow VR frame submission until a mirroring canvas layer has
-         * been returned by GetCanvasLayer
-         */
-        return nullptr;
-    }
-
-    VRManagerChild* vrmc = VRManagerChild::Get();
-    if (!vrmc) {
-        return nullptr;
-    }
-
-    /**
-     * Swap buffers as though composition has occurred.
-     * We will then share the resulting front buffer to be submitted to the VR
-     * compositor.
-     */
-    BeginComposition();
-    EndComposition();
-
-    gl::GLScreenBuffer* screen = gl->Screen();
-    if (!screen) {
-        return nullptr;
-    }
-
-    RefPtr<SharedSurfaceTextureClient> sharedSurface = screen->Front();
-    if (!sharedSurface) {
-        return nullptr;
-    }
-
-    if (sharedSurface && sharedSurface->GetAllocator() != vrmc) {
-        RefPtr<SharedSurfaceTextureClient> dest =
-        screen->Factory()->NewTexClient(sharedSurface->GetSize());
-        if (!dest) {
-            return nullptr;
-        }
-        gl::SharedSurface* destSurf = dest->Surf();
-        destSurf->ProducerAcquire();
-        SharedSurface::ProdCopy(sharedSurface->Surf(), dest->Surf(),
-                                screen->Factory());
-        destSurf->ProducerRelease();
-
-        return dest.forget();
-    }
-
-  return sharedSurface.forget();
-}
-
-bool
-WebGLContext::StartVRPresentation()
-{
-    VRManagerChild* vrmc = VRManagerChild::Get();
-    if (!vrmc) {
-        return false;
-    }
-    gl::GLScreenBuffer* screen = gl->Screen();
-    if (!screen) {
-        return false;
-    }
-    gl::SurfaceCaps caps = screen->mCaps;
-
-    UniquePtr<gl::SurfaceFactory> factory =
-        gl::GLScreenBuffer::CreateFactory(gl,
-            caps,
-            vrmc,
-            vrmc->GetBackendType(),
-            TextureFlags::ORIGIN_BOTTOM_LEFT);
-
-    if (factory) {
-        screen->Morph(Move(factory));
-    }
-    return true;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 
 static inline size_t
diff --git a/dom/canvas/WebGLContext.h b/dom/canvas/WebGLContext.h
index b4d416a33..3ec307b00 100644
--- a/dom/canvas/WebGLContext.h
+++ b/dom/canvas/WebGLContext.h
@@ -656,9 +656,6 @@ public:
     void PixelStorei(GLenum pname, GLint param);
     void PolygonOffset(GLfloat factor, GLfloat units);
 
-    already_AddRefed<layers::SharedSurfaceTextureClient> GetVRFrame();
-    bool StartVRPresentation();
-
     ////
 
     webgl::PackingInfo
-- 
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