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DXTextureInteropNVpr.cpp
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DXTextureInteropNVpr.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "DXTextureInteropNVpr.h"
#include "nvpr/WGL.h"
using namespace mozilla::gfx::nvpr;
using namespace std;
namespace mozilla {
namespace gfx {
DXTextureInteropNVpr::DXTextureInteropNVpr(void* aDX, void* aDXTexture,
bool& aSuccess)
: mDXInterop(nullptr)
, mTextureInterop(nullptr)
, mTextureId(0)
{
WGL* const wgl = static_cast<WGL*>(gl);
gl->MakeCurrent();
aSuccess = false;
if (!wgl->HasWGLExtension(WGL::NV_DX_interop2)) {
return;
}
mDXInterop = wgl->DXOpenDeviceNV(aDX);
if (!mDXInterop) {
return;
}
gl->GenTextures(1, &mTextureId);
mTextureInterop = wgl->DXRegisterObjectNV(mDXInterop, aDXTexture,
mTextureId, GL_TEXTURE_2D,
WGL_ACCESS_WRITE_DISCARD_NV);
if (mTextureInterop) {
return;
}
aSuccess = true;
}
DXTextureInteropNVpr::~DXTextureInteropNVpr()
{
WGL* const wgl = static_cast<WGL*>(gl);
gl->MakeCurrent();
if (mTextureInterop) {
MOZ_ASSERT(wgl->HasWGLExtension(WGL::NV_DX_interop2));
wgl->DXUnregisterObjectNV(mDXInterop, mTextureInterop);
}
if (mTextureId) {
gl->DeleteTexture(mTextureId);
}
if (mDXInterop) {
MOZ_ASSERT(wgl->HasWGLExtension(WGL::NV_DX_interop2));
wgl->DXCloseDeviceNV(mDXInterop);
}
}
GLuint
DXTextureInteropNVpr::Lock()
{
MOZ_ASSERT(gl->IsCurrent());
WGL* const wgl = static_cast<WGL*>(gl);
MOZ_ASSERT(wgl->HasWGLExtension(WGL::NV_DX_interop2));
wgl->DXLockObjectsNV(mDXInterop, 1, &mTextureInterop);
return mTextureId;
}
void
DXTextureInteropNVpr::Unlock()
{
MOZ_ASSERT(gl->IsCurrent());
WGL* const wgl = static_cast<WGL*>(gl);
MOZ_ASSERT(wgl->HasWGLExtension(WGL::NV_DX_interop2));
wgl->DXUnlockObjectsNV(mDXInterop, 1, &mTextureInterop);
}
}
}