EGLint SwapChain11::copyOffscreenToBackbuffer(EGLint x, EGLint y, EGLint width, EGLint height)
{
if (!mSwapChain)
{
return EGL_SUCCESS;
}
initPassThroughResources();
ID3D11DeviceContext *deviceContext = mRenderer->getDeviceContext();
// Set vertices
D3D11_MAPPED_SUBRESOURCE mappedResource;
HRESULT result = deviceContext->Map(mQuadVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
if (FAILED(result))
{
return EGL_BAD_ACCESS;
}
d3d11::PositionTexCoordVertex *vertices = static_cast<d3d11::PositionTexCoordVertex*>(mappedResource.pData);
// Create a quad in homogeneous coordinates
float x1 = (x / float(mWidth)) * 2.0f - 1.0f;
float y1 = (y / float(mHeight)) * 2.0f - 1.0f;
float x2 = ((x + width) / float(mWidth)) * 2.0f - 1.0f;
float y2 = ((y + height) / float(mHeight)) * 2.0f - 1.0f;
float u1 = x / float(mWidth);
float v1 = y / float(mHeight);
float u2 = (x + width) / float(mWidth);
float v2 = (y + height) / float(mHeight);
// Invert the quad vertices depending on the surface orientation.
if ((mOrientation & EGL_SURFACE_ORIENTATION_INVERT_X_ANGLE) != 0)
{
std::swap(x1, x2);
}
if ((mOrientation & EGL_SURFACE_ORIENTATION_INVERT_Y_ANGLE) != 0)
{
std::swap(y1, y2);
}
d3d11::SetPositionTexCoordVertex(&vertices[0], x1, y1, u1, v1);
d3d11::SetPositionTexCoordVertex(&vertices[1], x1, y2, u1, v2);
d3d11::SetPositionTexCoordVertex(&vertices[2], x2, y1, u2, v1);
d3d11::SetPositionTexCoordVertex(&vertices[3], x2, y2, u2, v2);
deviceContext->Unmap(mQuadVB, 0);
static UINT stride = sizeof(d3d11::PositionTexCoordVertex);
static UINT startIdx = 0;
deviceContext->IASetVertexBuffers(0, 1, &mQuadVB, &stride, &startIdx);
// Apply state
deviceContext->OMSetDepthStencilState(NULL, 0xFFFFFFFF);
static const float blendFactor[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
deviceContext->OMSetBlendState(NULL, blendFactor, 0xFFFFFFF);
deviceContext->RSSetState(mPassThroughRS);
// Apply shaders
deviceContext->IASetInputLayout(mPassThroughIL);
deviceContext->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
deviceContext->VSSetShader(mPassThroughVS, NULL, 0);
deviceContext->PSSetShader(mPassThroughPS, NULL, 0);
deviceContext->GSSetShader(NULL, NULL, 0);
auto stateManager = mRenderer->getStateManager();
// Apply render targets
stateManager->setOneTimeRenderTarget(mBackBufferRTView, nullptr);
// Set the viewport
D3D11_VIEWPORT viewport;
viewport.TopLeftX = 0;
viewport.TopLeftY = 0;
viewport.Width = static_cast<FLOAT>(mWidth);
viewport.Height = static_cast<FLOAT>(mHeight);
viewport.MinDepth = 0.0f;
viewport.MaxDepth = 1.0f;
deviceContext->RSSetViewports(1, &viewport);
// Apply textures
stateManager->setShaderResource(gl::SAMPLER_PIXEL, 0, mOffscreenSRView);
deviceContext->PSSetSamplers(0, 1, &mPassThroughSampler);
// Draw
deviceContext->Draw(4, 0);
// Rendering to the swapchain is now complete. Now we can call Present().
// Before that, we perform any cleanup on the D3D device. We do this before Present() to make sure the
// cleanup is caught under the current eglSwapBuffers() PIX/Graphics Diagnostics call rather than the next one.
stateManager->setShaderResource(gl::SAMPLER_PIXEL, 0, NULL);
mRenderer->markAllStateDirty();
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);
}
