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// Copyright 2020 the Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn_native/Surface.h"
#include "common/Platform.h"
#include "dawn_native/ChainUtils_autogen.h"
#include "dawn_native/Instance.h"
#include "dawn_native/SwapChain.h"
#if defined(DAWN_PLATFORM_WINDOWS)
# include <windows.ui.core.h>
#endif // defined(DAWN_PLATFORM_WINDOWS)
#if defined(DAWN_USE_X11)
# include "common/xlib_with_undefs.h"
#endif // defined(DAWN_USE_X11)
namespace dawn_native {
#if defined(DAWN_ENABLE_BACKEND_METAL)
bool InheritsFromCAMetalLayer(void* obj);
#endif // defined(DAWN_ENABLE_BACKEND_METAL)
MaybeError ValidateSurfaceDescriptor(const InstanceBase* instance,
const SurfaceDescriptor* descriptor) {
if (descriptor->nextInChain == nullptr) {
return DAWN_VALIDATION_ERROR("Surface cannot be created with just the base descriptor");
}
DAWN_TRY(ValidateSingleSType(descriptor->nextInChain,
wgpu::SType::SurfaceDescriptorFromMetalLayer,
wgpu::SType::SurfaceDescriptorFromWindowsHWND,
wgpu::SType::SurfaceDescriptorFromWindowsCoreWindow,
wgpu::SType::SurfaceDescriptorFromXlib));
#if defined(DAWN_ENABLE_BACKEND_METAL)
const SurfaceDescriptorFromMetalLayer* metalDesc = nullptr;
FindInChain(descriptor->nextInChain, &metalDesc);
if (!metalDesc) {
return DAWN_VALIDATION_ERROR("Unsupported sType");
}
// Check that the layer is a CAMetalLayer (or a derived class).
if (!InheritsFromCAMetalLayer(metalDesc->layer)) {
return DAWN_VALIDATION_ERROR("layer must be a CAMetalLayer");
}
#endif // defined(DAWN_ENABLE_BACKEND_METAL)
#if defined(DAWN_PLATFORM_WINDOWS)
# if defined(DAWN_PLATFORM_WIN32)
const SurfaceDescriptorFromWindowsHWND* hwndDesc = nullptr;
FindInChain(descriptor->nextInChain, &hwndDesc);
if (hwndDesc) {
if (IsWindow(static_cast<HWND>(hwndDesc->hwnd)) == 0) {
return DAWN_VALIDATION_ERROR("Invalid HWND");
}
return {};
}
# endif // defined(DAWN_PLATFORM_WIN32)
const SurfaceDescriptorFromWindowsCoreWindow* coreWindowDesc = nullptr;
FindInChain(descriptor->nextInChain, &coreWindowDesc);
if (coreWindowDesc) {
// Validate the coreWindow by query for ICoreWindow interface
ComPtr<ABI::Windows::UI::Core::ICoreWindow> coreWindow;
if (coreWindowDesc->coreWindow == nullptr ||
FAILED(static_cast<IUnknown*>(coreWindowDesc->coreWindow)
->QueryInterface(IID_PPV_ARGS(&coreWindow)))) {
return DAWN_VALIDATION_ERROR("Invalid CoreWindow");
}
return {};
}
return DAWN_VALIDATION_ERROR("Unsupported sType");
#endif // defined(DAWN_PLATFORM_WINDOWS)
#if defined(DAWN_USE_X11)
const SurfaceDescriptorFromXlib* xDesc = nullptr;
FindInChain(descriptor->nextInChain, &xDesc);
if (!xDesc) {
return DAWN_VALIDATION_ERROR("Unsupported sType");
}
// Check the validity of the window by calling a getter function on the window that
// returns a status code. If the window is bad the call return a status of zero. We
// need to set a temporary X11 error handler while doing this because the default
// X11 error handler exits the program on any error.
XErrorHandler oldErrorHandler =
XSetErrorHandler([](Display*, XErrorEvent*) { return 0; });
XWindowAttributes attributes;
int status = XGetWindowAttributes(reinterpret_cast<Display*>(xDesc->display),
xDesc->window, &attributes);
XSetErrorHandler(oldErrorHandler);
if (status == 0) {
return DAWN_VALIDATION_ERROR("Invalid X Window");
}
#endif // defined(DAWN_USE_X11)
return {};
}
Surface::Surface(InstanceBase* instance, const SurfaceDescriptor* descriptor)
: mInstance(instance) {
ASSERT(descriptor->nextInChain != nullptr);
const SurfaceDescriptorFromMetalLayer* metalDesc = nullptr;
const SurfaceDescriptorFromWindowsHWND* hwndDesc = nullptr;
const SurfaceDescriptorFromWindowsCoreWindow* coreWindowDesc = nullptr;
const SurfaceDescriptorFromXlib* xDesc = nullptr;
FindInChain(descriptor->nextInChain, &metalDesc);
FindInChain(descriptor->nextInChain, &hwndDesc);
FindInChain(descriptor->nextInChain, &coreWindowDesc);
FindInChain(descriptor->nextInChain, &xDesc);
ASSERT(metalDesc || hwndDesc || xDesc);
if (metalDesc) {
mType = Type::MetalLayer;
mMetalLayer = metalDesc->layer;
} else if (hwndDesc) {
mType = Type::WindowsHWND;
mHInstance = hwndDesc->hinstance;
mHWND = hwndDesc->hwnd;
} else if (coreWindowDesc) {
#if defined(DAWN_PLATFORM_WINDOWS)
mType = Type::WindowsCoreWindow;
mCoreWindow = static_cast<IUnknown*>(coreWindowDesc->coreWindow);
#endif // defined(DAWN_PLATFORM_WINDOWS)
} else if (xDesc) {
mType = Type::Xlib;
mXDisplay = xDesc->display;
mXWindow = xDesc->window;
} else {
UNREACHABLE();
}
}
Surface::~Surface() {
if (mSwapChain != nullptr) {
mSwapChain->DetachFromSurface();
mSwapChain = nullptr;
}
}
NewSwapChainBase* Surface::GetAttachedSwapChain() {
return mSwapChain.Get();
}
void Surface::SetAttachedSwapChain(NewSwapChainBase* swapChain) {
mSwapChain = swapChain;
}
InstanceBase* Surface::GetInstance() {
return mInstance.Get();
}
Surface::Type Surface::GetType() const {
return mType;
}
void* Surface::GetMetalLayer() const {
ASSERT(mType == Type::MetalLayer);
return mMetalLayer;
}
void* Surface::GetHInstance() const {
ASSERT(mType == Type::WindowsHWND);
return mHInstance;
}
void* Surface::GetHWND() const {
ASSERT(mType == Type::WindowsHWND);
return mHWND;
}
IUnknown* Surface::GetCoreWindow() const {
ASSERT(mType == Type::WindowsCoreWindow);
#if defined(DAWN_PLATFORM_WINDOWS)
return mCoreWindow.Get();
#else
return nullptr;
#endif
}
void* Surface::GetXDisplay() const {
ASSERT(mType == Type::Xlib);
return mXDisplay;
}
uint32_t Surface::GetXWindow() const {
ASSERT(mType == Type::Xlib);
return mXWindow;
}
} // namespace dawn_native