EGLint SwapChain11::resetOffscreenTexture(int backbufferWidth, int backbufferHeight)
{
ID3D11Device *device = mRenderer->getDevice();
ASSERT(device != NULL);
// D3D11 does not allow zero size textures
ASSERT(backbufferWidth >= 1);
ASSERT(backbufferHeight >= 1);
// Preserve the render target content
ID3D11Texture2D *previousOffscreenTexture = mOffscreenTexture;
if (previousOffscreenTexture)
{
previousOffscreenTexture->AddRef();
}
const int previousWidth = mWidth;
const int previousHeight = mHeight;
releaseOffscreenTexture();
// If the app passed in a share handle, open the resource
// See EGL_ANGLE_d3d_share_handle_client_buffer
if (mAppCreatedShareHandle)
{
ID3D11Resource *tempResource11;
HRESULT result = device->OpenSharedResource(mShareHandle, __uuidof(ID3D11Resource), (void**)&tempResource11);
if (FAILED(result))
{
ERR("Failed to open the swap chain pbuffer share handle: %08lX", result);
release();
return EGL_BAD_PARAMETER;
}
result = tempResource11->QueryInterface(__uuidof(ID3D11Texture2D), (void**)&mOffscreenTexture);
tempResource11->Release();
if (FAILED(result))
{
ERR("Failed to query texture2d interface in pbuffer share handle: %08lX", result);
release();
return EGL_BAD_PARAMETER;
}
// Validate offscreen texture parameters
D3D11_TEXTURE2D_DESC offscreenTextureDesc = {0};
mOffscreenTexture->GetDesc(&offscreenTextureDesc);
if (offscreenTextureDesc.Width != (UINT)backbufferWidth
|| offscreenTextureDesc.Height != (UINT)backbufferHeight
|| offscreenTextureDesc.Format != gl_d3d11::ConvertRenderbufferFormat(mBackBufferFormat)
|| offscreenTextureDesc.MipLevels != 1
|| offscreenTextureDesc.ArraySize != 1)
{
ERR("Invalid texture parameters in the shared offscreen texture pbuffer");
release();
return EGL_BAD_PARAMETER;
}
}
else
{
const bool useSharedResource = !mWindow && mRenderer->getShareHandleSupport();
D3D11_TEXTURE2D_DESC offscreenTextureDesc = {0};
offscreenTextureDesc.Width = backbufferWidth;
offscreenTextureDesc.Height = backbufferHeight;
offscreenTextureDesc.Format = gl_d3d11::ConvertRenderbufferFormat(mBackBufferFormat);
offscreenTextureDesc.MipLevels = 1;
offscreenTextureDesc.ArraySize = 1;
offscreenTextureDesc.SampleDesc.Count = 1;
offscreenTextureDesc.SampleDesc.Quality = 0;
offscreenTextureDesc.Usage = D3D11_USAGE_DEFAULT;
offscreenTextureDesc.BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;
offscreenTextureDesc.CPUAccessFlags = 0;
offscreenTextureDesc.MiscFlags = useSharedResource ? D3D11_RESOURCE_MISC_SHARED : 0;
HRESULT result = device->CreateTexture2D(&offscreenTextureDesc, NULL, &mOffscreenTexture);
if (FAILED(result))
{
ERR("Could not create offscreen texture: %08lX", result);
release();
if (d3d11::isDeviceLostError(result))
{
return EGL_CONTEXT_LOST;
}
else
{
return EGL_BAD_ALLOC;
}
}
d3d11::SetDebugName(mOffscreenTexture, "Offscreen texture");
// EGL_ANGLE_surface_d3d_texture_2d_share_handle requires that we store a share handle for the client
if (useSharedResource)
{
IDXGIResource *offscreenTextureResource = NULL;
result = mOffscreenTexture->QueryInterface(__uuidof(IDXGIResource), (void**)&offscreenTextureResource);
// Fall back to no share handle on failure
if (FAILED(result))
{
ERR("Could not query offscreen texture resource: %08lX", result);
}
else
{
result = offscreenTextureResource->GetSharedHandle(&mShareHandle);
offscreenTextureResource->Release();
if (FAILED(result))
{
mShareHandle = NULL;
ERR("Could not get offscreen texture shared handle: %08lX", result);
}
}
}
}
HRESULT result = device->CreateRenderTargetView(mOffscreenTexture, NULL, &mOffscreenRTView);
ASSERT(SUCCEEDED(result));
d3d11::SetDebugName(mOffscreenRTView, "Offscreen render target");
result = device->CreateShaderResourceView(mOffscreenTexture, NULL, &mOffscreenSRView);
ASSERT(SUCCEEDED(result));
d3d11::SetDebugName(mOffscreenSRView, "Offscreen shader resource");
if (mDepthBufferFormat != GL_NONE)
{
D3D11_TEXTURE2D_DESC depthStencilDesc = {0};
depthStencilDesc.Width = backbufferWidth;
depthStencilDesc.Height = backbufferHeight;
depthStencilDesc.Format = gl_d3d11::ConvertRenderbufferFormat(mDepthBufferFormat);
depthStencilDesc.MipLevels = 1;
depthStencilDesc.ArraySize = 1;
depthStencilDesc.SampleDesc.Count = 1;
depthStencilDesc.SampleDesc.Quality = 0;
depthStencilDesc.Usage = D3D11_USAGE_DEFAULT;
depthStencilDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
depthStencilDesc.CPUAccessFlags = 0;
depthStencilDesc.MiscFlags = 0;
result = device->CreateTexture2D(&depthStencilDesc, NULL, &mDepthStencilTexture);
if (FAILED(result))
{
ERR("Could not create depthstencil surface for new swap chain: 0x%08X", result);
release();
if (d3d11::isDeviceLostError(result))
{
return EGL_CONTEXT_LOST;
}
else
{
return EGL_BAD_ALLOC;
}
}
d3d11::SetDebugName(mDepthStencilTexture, "Depth stencil texture");
result = device->CreateDepthStencilView(mDepthStencilTexture, NULL, &mDepthStencilDSView);
ASSERT(SUCCEEDED(result));
d3d11::SetDebugName(mDepthStencilDSView, "Depth stencil view");
}
mWidth = backbufferWidth;
mHeight = backbufferHeight;
if (previousOffscreenTexture != NULL)
{
D3D11_BOX sourceBox = {0};
sourceBox.left = 0;
sourceBox.right = std::min(previousWidth, mWidth);
sourceBox.top = std::max(previousHeight - mHeight, 0);
sourceBox.bottom = previousHeight;
sourceBox.front = 0;
sourceBox.back = 1;
ID3D11DeviceContext *deviceContext = mRenderer->getDeviceContext();
const int yoffset = std::max(mHeight - previousHeight, 0);
deviceContext->CopySubresourceRegion(mOffscreenTexture, 0, 0, yoffset, 0, previousOffscreenTexture, 0, &sourceBox);
previousOffscreenTexture->Release();
if (mSwapChain)
{
swapRect(0, 0, mWidth, mHeight);
}
}
return EGL_SUCCESS;
}
EGLint SwapChain11::reset(int backbufferWidth, int backbufferHeight, EGLint swapInterval)
{
ID3D11Device *device = mRenderer->getDevice();
if (device == NULL)
{
return EGL_BAD_ACCESS;
}
// Release specific resources to free up memory for the new render target, while the
// old render target still exists for the purpose of preserving its contents.
if (mSwapChain)
{
mSwapChain->Release();
mSwapChain = NULL;
}
if (mBackBufferTexture)
{
mBackBufferTexture->Release();
mBackBufferTexture = NULL;
}
if (mBackBufferRTView)
{
mBackBufferRTView->Release();
mBackBufferRTView = NULL;
}
mSwapInterval = static_cast<unsigned int>(swapInterval);
if (mSwapInterval > 4)
{
// IDXGISwapChain::Present documentation states that valid sync intervals are in the [0,4] range
return EGL_BAD_PARAMETER;
}
// EGL allows creating a surface with 0x0 dimension, however, DXGI does not like 0x0 swapchains
if (backbufferWidth < 1 || backbufferHeight < 1)
{
releaseOffscreenTexture();
return EGL_SUCCESS;
}
if (mWindow)
{
// We cannot create a swap chain for an HWND that is owned by a different process
DWORD currentProcessId = GetCurrentProcessId();
DWORD wndProcessId;
GetWindowThreadProcessId(mWindow, &wndProcessId);
if (currentProcessId != wndProcessId)
{
ERR("Could not create swap chain, window owned by different process");
release();
return EGL_BAD_NATIVE_WINDOW;
}
IDXGIFactory *factory = mRenderer->getDxgiFactory();
DXGI_SWAP_CHAIN_DESC swapChainDesc = {0};
swapChainDesc.BufferCount = 2;
swapChainDesc.BufferDesc.Format = gl_d3d11::ConvertRenderbufferFormat(mBackBufferFormat);
swapChainDesc.BufferDesc.Width = backbufferWidth;
swapChainDesc.BufferDesc.Height = backbufferHeight;
swapChainDesc.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
swapChainDesc.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
swapChainDesc.BufferDesc.RefreshRate.Numerator = 0;
swapChainDesc.BufferDesc.RefreshRate.Denominator = 1;
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDesc.Flags = 0;
swapChainDesc.OutputWindow = mWindow;
swapChainDesc.SampleDesc.Count = 1;
swapChainDesc.SampleDesc.Quality = 0;
swapChainDesc.Windowed = TRUE;
HRESULT result = factory->CreateSwapChain(device, &swapChainDesc, &mSwapChain);
if (FAILED(result))
{
ERR("Could not create additional swap chains or offscreen surfaces: %08lX", result);
release();
if (d3d11::isDeviceLostError(result))
{
return EGL_CONTEXT_LOST;
}
else
{
return EGL_BAD_ALLOC;
}
}
result = mSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&mBackBufferTexture);
ASSERT(SUCCEEDED(result));
d3d11::SetDebugName(mBackBufferTexture, "Back buffer texture");
result = device->CreateRenderTargetView(mBackBufferTexture, NULL, &mBackBufferRTView);
ASSERT(SUCCEEDED(result));
d3d11::SetDebugName(mBackBufferRTView, "Back buffer render target");
}
// If we are resizing the swap chain, we don't wish to recreate all the static resources
if (!mPassThroughResourcesInit)
{
mPassThroughResourcesInit = true;
initPassThroughResources();
}
return resetOffscreenTexture(backbufferWidth, backbufferHeight);
}
EGLint SwapChain11::reset(int backbufferWidth, int backbufferHeight, EGLint swapInterval)
{
ID3D11Device *device = mRenderer->getDevice();
if (device == NULL)
{
return EGL_BAD_ACCESS;
}
// Release specific resources to free up memory for the new render target, while the
// old render target still exists for the purpose of preserving its contents.
SafeRelease(mSwapChain);
SafeRelease(mBackBufferTexture);
SafeRelease(mBackBufferRTView);
mSwapInterval = static_cast<unsigned int>(swapInterval);
if (mSwapInterval > 4)
{
// IDXGISwapChain::Present documentation states that valid sync intervals are in the [0,4] range
return EGL_BAD_PARAMETER;
}
// EGL allows creating a surface with 0x0 dimension, however, DXGI does not like 0x0 swapchains
if (backbufferWidth < 1 || backbufferHeight < 1)
{
releaseOffscreenTexture();
return EGL_SUCCESS;
}
if (mNativeWindow.getNativeWindow())
{
const d3d11::TextureFormat &backbufferFormatInfo = d3d11::GetTextureFormatInfo(mBackBufferFormat, mRenderer->getFeatureLevel());
HRESULT result = mNativeWindow.createSwapChain(device, mRenderer->getDxgiFactory(),
backbufferFormatInfo.texFormat,
backbufferWidth, backbufferHeight, &mSwapChain);
if (FAILED(result))
{
ERR("Could not create additional swap chains or offscreen surfaces: %08lX", result);
release();
if (d3d11::isDeviceLostError(result))
{
return EGL_CONTEXT_LOST;
}
else
{
return EGL_BAD_ALLOC;
}
}
result = mSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&mBackBufferTexture);
ASSERT(SUCCEEDED(result));
d3d11::SetDebugName(mBackBufferTexture, "Back buffer texture");
result = device->CreateRenderTargetView(mBackBufferTexture, NULL, &mBackBufferRTView);
ASSERT(SUCCEEDED(result));
d3d11::SetDebugName(mBackBufferRTView, "Back buffer render target");
}
// If we are resizing the swap chain, we don't wish to recreate all the static resources
if (!mPassThroughResourcesInit)
{
mPassThroughResourcesInit = true;
initPassThroughResources();
}
return resetOffscreenTexture(backbufferWidth, backbufferHeight);
}