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I have a problem with capturing screen from full screen application (game). I made code to capture screen based on code from those links:
Capture screen using DirectX
DirectX Partial Screen Capture
But it only works when using somewhere on desktop, not in full screen app. Tried to change "parameters.Windowed" to false, not worked, tried some options within createdevice function, but when full screen it cannot create device (stays null, hr returned is 0x88760868).
Code:
void get_screen()
{
UINT adapter = D3DADAPTER_DEFAULT;
IDirect3D9 *d3d = nullptr;
IDirect3DDevice9 *device = nullptr;
IDirect3DSurface9 *surface = nullptr;
D3DPRESENT_PARAMETERS parameters = { 0 };
D3DDISPLAYMODE mode; //screen resolution
D3DLOCKED_RECT rc;
UINT pitch;
SYSTEMTIME st;
LPBYTE shots = nullptr;
HRESULT hr;
// init D3D and get screen size
d3d = Direct3DCreate9(D3D_SDK_VERSION);
d3d->GetAdapterDisplayMode(adapter, &mode);
parameters.Windowed = TRUE;
parameters.BackBufferFormat = D3DFMT_A8R8G8B8;
parameters.BackBufferHeight = mode.Height;
parameters.BackBufferWidth = mode.Width;
parameters.SwapEffect = D3DSWAPEFFECT_DISCARD;
// create device & capture surface
d3d->CreateDevice(adapter, D3DDEVTYPE_HAL, NULL, D3DCREATE_HARDWARE_VERTEXPROCESSING, ¶meters, &device);
device->CreateOffscreenPlainSurface(mode.Width, mode.Height, D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &surface, nullptr);
// get the data
device->GetFrontBufferData(0, surface);
surface->LockRect(&rc, NULL, 0);
pitch = rc.Pitch;
shots = new BYTE[pitch * mode.Height];
CopyMemory(shots, rc.pBits, rc.Pitch * mode.Height);
surface->UnlockRect();
// save all screenshots
WCHAR file[100] = L"test.png";
save_screen(mode.Width, mode.Height, pitch, shots, file, GUID_ContainerFormatPng);
//cleanup:
surface->Release();
device->Release();
d3d->Release();
}
I've made quite a bit of progress since the last time I asked a question. I've got a really cool build now with a terrain mesh with mountains and lakes:
LakeAndMountains
I made a release build, debugged it, and now it works just fine on my computer. I can take the application folder and move it around on my computer and run the .exe file with no issues. However, when I copy the application directory over to my other computer (and my friend's computer), it fails during the D3D11CreateDeviceAndSwapChain step with an HR of S_False.
For both my other computer and my friend's computer, it triggers only the if(failed(hr)) after the create function is called, and it says dev/devcon/swapchain are all NULL. Because they are all null, when it hits the function from swapchain, it crashes with an access violation error.
I searched for a few days looking for solutions, but I have yet to see one that had the S_FALSE occur. I tried some of the more straightforward answers but got nothing. All the computers are running 64bit on 64 bit OS, all have DirectX12, all are high end gaming PCs, my other computer actually has VS2017CE as well set up for c++ game programming, but they both still fail on that line. I'd really appreciate it if anyone could give me some guidance on where to begin deciphering why a release build works on my computer but not on anyone else's computer. Here is the code where it gets initialized, as well as the code for the window creation (code is excerpted to just the relevant parts of the functions):
WinMain:
// the entry point for any Windows program
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
//MessageBox(NULL, "Start of WinMain", "WinMain", 0);
// the handle for the window, filled by a function
HWND hWnd;
// this struct holds information for the window class
WNDCLASSEX wc;
//Screen size variables
long screenWidth = 1280;
long screenHeight = 720;
UINT screenWidthUINT = 1280;
UINT screenHeightUINT = 720;
// clear out the window class for use
ZeroMemory(&wc, sizeof(WNDCLASSEX));
// fill in the struct with the needed information
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
//wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
wc.lpszClassName = "WindowClass1";
// register the window class
RegisterClassEx(&wc);
RECT wr = { 0, 0, screenWidth, screenHeight }; // set the size, but not the position
AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE); // adjust the size
// create the window and use the result as the handle
hWnd = CreateWindowEx(NULL,
"WindowClass1",
"Game",
WS_OVERLAPPEDWINDOW,
0, // x-position of the window
0, // y-position of the window
wr.right - wr.left, // width of the window
wr.bottom - wr.top, // height of the window
NULL,
NULL,
hInstance,
NULL);
// display the window on the screen
ShowWindow(hWnd, nCmdShow);
//MessageBox(NULL, "called ShowWindow", "WinMain", 0);
/*****************************************
// GAME ENGINE INITIALIZATION
******************************************/
//Need to initialize the graphics engine. This passes the window pointer through the
//game engine to the D3D engine so it knows what window to look at.
//MessageBox(NULL, "Calling InitGraphics", "WinMain", 0);
InitGraphics(hWnd);
InitGraphics:
//DEVICE CREATION
#include Windows.h
#include <windowsx.h>
#include <d3d11.h>
#include <DirectXMath.h>
#include <D3Dcompiler.h>
#include <dxgi.h>
#pragma comment(lib, "d3d11.lib")
#pragma comment(lib, "dxgi.lib")
#pragma comment(lib, "d3dcompiler.lib")
#include "DirectXDeviceEngine.h"
using namespace DirectX;
InitGraphics(HWND hWnd)
{
//call at start to initialize D3DX
if (hWnd == NULL)
{
MessageBox(NULL, "hWnd was NULL", "DirectXDeviceEngine", 0);
}
HRESULT hr;
//initialize swap chain
//Describe our Buffer
DXGI_MODE_DESC bufferDesc;
ZeroMemory(&bufferDesc, sizeof(DXGI_MODE_DESC));
bufferDesc.Width = winWidth;
bufferDesc.Height = winHeight;
bufferDesc.RefreshRate.Numerator = 60;
bufferDesc.RefreshRate.Denominator = 1;
bufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
bufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
bufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
// create a struct to hold information about the swap chain
DXGI_SWAP_CHAIN_DESC scd;
// clear out the struct for use
ZeroMemory(&scd, sizeof(DXGI_SWAP_CHAIN_DESC));
// fill the swap chain description struct
scd.BufferCount = 1; // one back buffer
scd.BufferDesc = bufferDesc;
scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; // how swap chain is to be used
scd.OutputWindow = hWnd; // the window to be used
scd.SampleDesc.Count = 4; // how many multisamples
scd.SampleDesc.Quality = 1;
scd.Windowed = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH; // windowed/full-screen mode
scd.Flags = 0;
// create a device, device context and swap chain using the information in the scd struct
dev = NULL;
devcon = NULL;
swapchain = NULL;
hr = D3D11CreateDeviceAndSwapChain(
NULL, //null
D3D_DRIVER_TYPE_HARDWARE, //driver type
NULL, //handle to a software rasterizer, should be null if driver type isn't software
NULL, //UINT device creation flags, can be ORed together
NULL, //D3D Feature level, when NULL defaults to 11.0-9.1 feature levels
NULL, //the number of elements in the D3D feature level array
D3D11_SDK_VERSION, //set to D3D11_SDK_VERSION
&scd, //reference to the swap chain desc
&swapchain, //reference to the pointer to the swap chain
&dev, //reference to the pointer to the device
NULL, //returns a reference to the first supported element in the feature level array
&devcon); //reference to the pointer to the device context
if (FAILED(hr))
{
//CODE FALLS INTO THIS BLOCK ON OTHER COMPUTER
MessageBox(NULL, "Create Device and SwapChain FAILED", "DirectXDeviceEngine", 0);
if (swapchain == NULL)
{
MessageBox(NULL, "swapchain was NULL", "DirectXDeviceEngine", 0);
}
if (dev == NULL)
{
MessageBox(NULL, "dev was NULL", "DirectXDeviceEngine", 0);
}
if (devcon == NULL)
{
MessageBox(NULL, "devcon was NULL", "DirectXDeviceEngine", 0);
}
}
//prepare buffers
// get the address of the back buffer
ID3D11Texture2D *pBackBuffer;
//VVVV CODE THEN CRASHES ON NEXT LINE BECAUSE SWAPCHAIN IS NULL VVVV
swapchain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
Thanks in advance.
----UPDATE 2017/09/08-----
So I swapped some code around but I still get the error on the other computer. Current code looks like this:
//call at start to initialize D3DX
if (&hWnd == NULL)
{
MessageBox(NULL, "hWnd was NULL", "DirectXDeviceEngine", 0);
}
HRESULT hr;
// create a device, device context and swap chain using the information in the scd struct
dev = NULL;
devcon = NULL;
swapchain = NULL;
D3D_FEATURE_LEVEL lvl[] = {
D3D_FEATURE_LEVEL_11_1, D3D_FEATURE_LEVEL_11_0,
D3D_FEATURE_LEVEL_10_1, D3D_FEATURE_LEVEL_10_0,
D3D_FEATURE_LEVEL_9_3, D3D_FEATURE_LEVEL_9_2, D3D_FEATURE_LEVEL_9_1 };
DWORD createDeviceFlags = 0;
hash ifdef _DEBUG
createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
hash endif
D3D_FEATURE_LEVEL fl;
hr = D3D11CreateDevice(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr,
createDeviceFlags, lvl, _countof(lvl),
D3D11_SDK_VERSION, &dev, &fl, &devcon);
if (hr == E_INVALIDARG)
{
hr = D3D11CreateDevice(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr,
createDeviceFlags, &lvl[1], _countof(lvl) - 1,
D3D11_SDK_VERSION, &dev, &fl, &devcon);
}
if (FAILED(hr))
{
MessageBox(NULL, "Create Device Failed", "DirectXDeviceEngine", 0);
}
IDXGIDevice * dxgiDevice = 0;
dev->QueryInterface(__uuidof(IDXGIDevice), (void **)& dxgiDevice);
IDXGIAdapter * dxgiAdapter = 0;
dxgiDevice->GetParent(__uuidof(IDXGIAdapter), (void **)& dxgiAdapter);
IDXGIFactory * dxgiFactory = 0;
dxgiAdapter->GetParent(__uuidof(IDXGIFactory), (void **)& dxgiFactory);
//initialize swap chain
//Describe our Buffer
DXGI_MODE_DESC bufferDesc;
ZeroMemory(&bufferDesc, sizeof(DXGI_MODE_DESC));
/*bufferDesc.Width = winWidth;
bufferDesc.Height = winHeight;
bufferDesc.RefreshRate.Numerator = 60;
bufferDesc.RefreshRate.Denominator = 1;
*/
bufferDesc.Width = 0;
bufferDesc.Height = 0;
bufferDesc.RefreshRate.Numerator = 0;
bufferDesc.RefreshRate.Denominator = 1;
bufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
bufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
bufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
// create a struct to hold information about the swap chain
DXGI_SWAP_CHAIN_DESC scd;
// clear out the struct for use
ZeroMemory(&scd, sizeof(DXGI_SWAP_CHAIN_DESC));
// fill the swap chain description struct
scd.BufferCount = 1; // one back buffer
scd.BufferDesc = bufferDesc;
scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; // how swap chain is to be used
scd.OutputWindow = hWnd; // the window to be used
scd.SampleDesc.Count = 4; // how many multisamples
scd.SampleDesc.Quality = 1;
scd.Windowed = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH; // windowed/full-screen mode
scd.Flags = 0;
hr = dxgiFactory->CreateSwapChain(dev, &scd, &swapchain);
if (FAILED(hr))
{
//fails here
MessageBox(NULL, "Create Swap Chain Failed", "DirectXDeviceEngine", 0);
}
if (dxgiDevice != NULL)
{
dxgiDevice->Release();
}
if (dxgiAdapter != NULL)
{
dxgiAdapter->Release();
}
if (dxgiFactory != NULL)
{
dxgiFactory->Release();
}
//prepare buffers
// get the address of the back buffer
ID3D11Texture2D *pBackBuffer;
swapchain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
So, there is still some weird stuff happening here I'm not getting. If someone has an example of how to use FindClosestMatchingMode properly, I'd really appreciate it.
There is one other really peculiar thing though. When I am in the debugger on my laptop, the variable hWnd has a value, but the compiler says that it is Unused and can't display a value for it. Is this normal or could this be the source of the problem as hWnd is used in the Swap Chain Description? How can hWnd be bad/unused on the other computer but not on my desktop?
Thanks again.
So I FINALLY found the cause of the issue. For some reason, the Count 4 Quality 1 MSAA was not working on the other computer. When I set it to 1/0, it ran perfectly. I'll need to look into how to properly enumerate the MSAA stuff so it can be adjusted depending on the computer.
I am pretty new to DirectX 10 programming, and I have been trying to do the following with my limited skills..
I am trying to display an Image from one machine on to another output device(Another Monitor/TV) connected via HDMI. I researched on it and came to know that DXGI can be pretty useful for rendering purposes. Moreover while researching further I came across this link here. It does show how to display different images on multiple monitors connected to the main machine but it requires extended display for that.
My requirement is that when I run the code It should render the image on another output device without making it an extended display.
Approcah I am trying is that I am enumerating Video Adapters(which in my case is 1 ) and and then enumerating outputs available which should be two in numbers as I have an HDMI out connected to my PC. But if I do not set extended display it shows only one output available in my enumerated outputs array and if I extend the display it shows two of them.Once I am done with enumerating outputs I want to Render that image on desired output.
As far as i know every video adapter has a port for HDMI connected to it.
I wonder, if there is way I can access that port programatically and could render the image using that port??
Other than MSDN, documentation or explanation of those concepts are rather limited, so any help would be very welcome. Here is some code I have :
// include the basic windows header files and the Direct3D header files
#include <windows.h>
#include <windowsx.h>
#include <d3d11.h>
#include <d3dx11.h>
#include <d3dx10.h>
#include<vector>
#include<iostream>
#include <sstream>
#include<dxgi.h>
using namespace std;
// include the Direct3D Library file
#pragma comment (lib, "d3d11.lib")
#pragma comment (lib, "d3dx11.lib")
#pragma comment (lib, "d3dx10.lib")
#pragma comment(lib, "dxguid.lib")
#pragma comment(lib, "dxgi.lib")
std::vector<IDXGIAdapter*> EnumerateAdapters();
void PrintAdapterInfo(IDXGIAdapter* pAdapter);
std::vector<IDXGIOutput*> EnumerateOutputs(IDXGIAdapter* pAdapter);
void PrintOutputInfo(IDXGIOutput* output);
std::vector<DXGI_MODE_DESC*> GetDisplayModeList(IDXGIOutput* output);
void PrintDisplayModeInfo(DXGI_MODE_DESC* pModeDesc);
// global declarations
IDXGISwapChain *swapchain; // the pointer to the swap chain interface
ID3D11Device *dev; // the pointer to our Direct3D device interface
ID3D11DeviceContext *devcon; // the pointer to our Direct3D device context
ID3D11RenderTargetView *backbuffer; // the pointer to our back buffer
IDXGIAdapter *pAdapter;
IDXGIAdapter* adapter = NULL;
IDXGIFactory1* factory = NULL;
HINSTANCE hInstance;
HINSTANCE hPrevInstance;
LPSTR lpCmdLine;
HWND hWnd;
std::vector<IDXGIOutput*> outputArray;
int nCmdShow;
// function prototypes
void InitD3D(HWND hWnd); // sets up and initializes Direct3D
void RenderFrame(void); // renders a single frame
void CleanD3D(void); // closes Direct3D and releases memory
void CreateWindowsForOutputs();
void GetAdapter();
void MultiRender();
void CreateSwapChainsAndViews();
std::vector<IDXGIAdapter*> EnumerateAdapters();
// the WindowProc function prototype
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
struct WindowDataContainer
{
//Direct3D 10 stuff per window data
IDXGISwapChain* swapChain;
ID3D11RenderTargetView* renderTargetView;
ID3D11DepthStencilView* depthStencilView;
// window goodies
HWND hWnd;
int width;
int height;
};
std::vector<WindowDataContainer*> WindowsArray;
// the entry point for any Windows program
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
std::cout << "Hello \nworld!"; // Will show a popup
std::vector<IDXGIAdapter*> adapters = EnumerateAdapters();
for(std::vector<IDXGIAdapter*>::iterator itor = adapters.begin(); itor != adapters.end(); ++itor)
{
//PrintAdapterInfo(*itor);
// Get Output info
std::vector<IDXGIOutput*> outputArray = EnumerateOutputs(*itor);
for(std::vector<IDXGIOutput*>::iterator outputItor = outputArray.begin(); outputItor != outputArray.end(); ++outputItor)
{
// PrintOutputInfo(*outputItor);
// Get display mode list
std::vector<DXGI_MODE_DESC*> modeList = GetDisplayModeList(*outputItor);
for(std::vector<DXGI_MODE_DESC*>::iterator modeItor = modeList.begin(); modeItor != modeList.end(); ++modeItor)
{
// PrintDisplayModeInfo(*modeItor);
}
}
CreateWindowsForOutputs();
MSG msg;
while(TRUE)
{
if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
if(msg.message == WM_QUIT)
break;
}
MultiRender();
}
//std::getchar();
// return 0;
}
//std:getchar();
}
std::vector<IDXGIAdapter*> EnumerateAdapters()
{
// Create DXGI factory
IDXGIFactory1* pFactory = NULL;
HRESULT hr = CreateDXGIFactory1(__uuidof(IDXGIFactory1), (void**)(&pFactory));
if (FAILED(hr))
{
MessageBox(NULL, L"Create DXGI factory failed", L"Error", 0);
}
// Enumerate devices
IDXGIAdapter* pAdapter = NULL;
std::vector<IDXGIAdapter*> vAdapters;
for (UINT i = 0; pFactory->EnumAdapters(i, &pAdapter) != DXGI_ERROR_NOT_FOUND; ++i)
{
vAdapters.push_back(pAdapter);
}
if (pFactory)
{
pFactory->Release();
pFactory = NULL;
}
return vAdapters;
}
// this is the main message handler for the program
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
} break;
}
return DefWindowProc (hWnd, message, wParam, lParam);
}
// this function initializes and prepares Direct3D for use
void InitD3D(HWND hWnd)
{
// create a struct to hold information about the swap chain
DXGI_SWAP_CHAIN_DESC scd;
// clear out the struct for use
ZeroMemory(&scd, sizeof(DXGI_SWAP_CHAIN_DESC));
// fill the swap chain description struct
scd.BufferCount = 1; // one back buffer
scd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; // use 32-bit color
scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; // how swap chain is to be used
scd.OutputWindow = hWnd; // the window to be used
scd.SampleDesc.Count = 1; // how many multisamples
scd.SampleDesc.Quality = 0; // multisample quality level
scd.Windowed = TRUE; // windowed/full-screen mode
// create a device, device context and swap chain using the information in the scd struct
D3D11CreateDeviceAndSwapChain( NULL,
D3D_DRIVER_TYPE_HARDWARE,
NULL,
NULL,
NULL,
NULL,
D3D11_SDK_VERSION,
&scd,
&swapchain,
&dev,
NULL,
&devcon);
// get the address of the back buffer
ID3D11Texture2D *pBackBuffer;
swapchain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
// use the back buffer address to create the render target
dev->CreateRenderTargetView(pBackBuffer, NULL, &backbuffer);
pBackBuffer->Release();
// set the render target as the back buffer
devcon->OMSetRenderTargets(1, &backbuffer, NULL);
// Set the viewport
D3D11_VIEWPORT viewport;
ZeroMemory(&viewport, sizeof(D3D11_VIEWPORT));
viewport.TopLeftX = 0;
viewport.TopLeftY = 0;
viewport.Width = 800;
viewport.Height = 600;
devcon->RSSetViewports(1, &viewport);
}
// this is the function used to render a single frame
void RenderFrame(void)
{
// clear the back buffer to a deep blue
devcon->ClearRenderTargetView(backbuffer, D3DXCOLOR(0.0f, 0.2f, 0.4f, 1.0f));
// do 3D rendering on the back buffer here
// switch the back buffer and the front buffer
swapchain->Present(0, 0);
}
// this is the function that cleans up Direct3D and COM
void CleanD3D(void)
{
// close and release all existing COM objects
swapchain->Release();
backbuffer->Release();
dev->Release();
devcon->Release();
}
//Acquiring the outputs on our adapter
std::vector<IDXGIOutput*> EnumerateOutputs(IDXGIAdapter* pAdapter)
{
//std::vector<IDXGIOutput*> outputs;
IDXGIOutput* pOutput = NULL;
for (UINT i = 0; pAdapter->EnumOutputs(i, &pOutput) != DXGI_ERROR_NOT_FOUND; ++i)
{
outputArray.push_back(pOutput);
}
return outputArray;
}
void CreateWindowsForOutputs()
{ // std::vector<IDXGIOutput*> outputArray;
for( int i = 0; i < outputArray.size(); ++i )
{
IDXGIOutput* output = outputArray.at(i);
DXGI_OUTPUT_DESC outputDesc;
output->GetDesc( &outputDesc );
int x = outputDesc.DesktopCoordinates.left;
int y = outputDesc.DesktopCoordinates.top;
int width = outputDesc.DesktopCoordinates.right - x;
int height = outputDesc.DesktopCoordinates.bottom - y;
WNDCLASSEX wc;
ZeroMemory(&wc, sizeof(WNDCLASSEX));
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
wc.lpszClassName = L"WindowClass";
RegisterClassEx(&wc);
RECT wr = {0, 0, 800, 600};
AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE);
// Don't forget to clean this up. And all D3D COM objects.
WindowDataContainer* window = new WindowDataContainer;
window->hWnd = CreateWindowEx(NULL,
L"WindowClass",
L"Our First Direct3D Program",
WS_OVERLAPPEDWINDOW,
300,
300,
wr.right - wr.left,
wr.bottom - wr.top,
NULL,
NULL,
hInstance,
NULL);
// show the window
ShowWindow( window->hWnd, SW_SHOWDEFAULT );
// InitD3D(hWnd);
CreateSwapChainsAndViews();
// set width and height
window->width = width;
window->height = height;
std::vector<WindowDataContainer*> windowsArray;
// shove it in the std::vector
windowsArray.push_back(window);
//if first window, associate it with DXGI so it can jump in
// when there is something of interest in the message queue
// think fullscreen mode switches etc. MSDN for more info.
// if(i == 0)
// factory->MakeWindowAssociation( window->hWnd, 0 );
}
}
std::vector<DXGI_MODE_DESC*> GetDisplayModeList(IDXGIOutput* output)
{
UINT num = 0;
DXGI_FORMAT format = DXGI_FORMAT_R32G32B32A32_TYPELESS;
UINT flags = DXGI_ENUM_MODES_INTERLACED | DXGI_ENUM_MODES_SCALING;
// Get number of display modes
output->GetDisplayModeList(format, flags, &num, 0);
// Get display mode list
DXGI_MODE_DESC * pDescs = new DXGI_MODE_DESC[num];
output->GetDisplayModeList(format, flags, &num, pDescs);
std::vector<DXGI_MODE_DESC*> displayList;
for(int i = 0; i < num; ++i)
{
displayList.push_back(&pDescs[i]);
}
return displayList;
}
void CreateSwapChainsAndViews()
{
std::vector<WindowDataContainer*> windowsArray;
for( int i = 0; i < windowsArray.size(); i++ )
{
WindowDataContainer* window = windowsArray.at(i);
// get the dxgi device
IDXGIDevice* DXGIDevice = NULL;
dev->QueryInterface( IID_IDXGIDevice, ( void** )&DXGIDevice ); // COM stuff, hopefully you are familiar
// create a swap chain
DXGI_SWAP_CHAIN_DESC swapChainDesc;
// fill it in
WindowDataContainer *p_Window = new WindowDataContainer;
HRESULT hr = factory->CreateSwapChain( DXGIDevice, &swapChainDesc, &p_Window->swapChain );
DXGIDevice->Release();
DXGIDevice = NULL;
// get the backbuffer
ID3D11Texture2D* backBuffer = NULL;
hr = window->swapChain->GetBuffer( 0, IID_ID3D11Texture2D, ( void** )&backBuffer );
// get the backbuffer desc
D3D11_TEXTURE2D_DESC backBufferDesc;
backBuffer->GetDesc( &backBufferDesc );
// create the render target view
D3D11_RENDER_TARGET_VIEW_DESC RTVDesc;
// fill it in
dev->CreateRenderTargetView( backBuffer, &RTVDesc, &window->renderTargetView );
backBuffer->Release();
backBuffer = NULL;
// Create depth stencil texture
ID3D11Texture2D* depthStencil = NULL;
D3D11_TEXTURE2D_DESC descDepth;
// fill it in
dev->CreateTexture2D( &descDepth, NULL, &depthStencil );
// Create the depth stencil view
D3D11_DEPTH_STENCIL_VIEW_DESC descDSV;
// fill it in
dev->CreateDepthStencilView( depthStencil, &descDSV, &window->depthStencilView );
}
}
void MultiRender( )
{
std::vector<WindowDataContainer*> windowsArray;
// Clear them all
for( int i = 0; i < windowsArray.size(); i++ )
{
WindowDataContainer* window = windowsArray.at(i);
// There is the answer to your second question:
devcon->OMSetRenderTargets( 1, &window->renderTargetView, NULL );
// Don't forget to adjust the viewport, in fullscreen it's not important...
D3D11_VIEWPORT Viewport;
Viewport.TopLeftX = 0;
Viewport.TopLeftY = 0;
Viewport.Width = window->width;
Viewport.Height = window->height;
Viewport.MinDepth = 0.0f;
Viewport.MaxDepth = 1.0f;
devcon->RSSetViewports( 1, &Viewport );
// TO DO: AMAZING STUFF PER WINDOW
}
}
//std::vector<IDXGIOutput*> outputArray; // contains outputs per adapter
void EnumOutputsOnAdapter()
{
IDXGIOutput* output = NULL;
for(int i = 0; DXGI_ERROR_NOT_FOUND != adapter->EnumOutputs(i, &output); ++i)
{
// get the description
DXGI_OUTPUT_DESC outputDesc;
HRESULT hr = output->GetDesc( &outputDesc );
outputArray.push_back( output );
}
}
// applicable for multiple ones with little effort
void GetAdapter()
{
// remember, we assume there's only one adapter (example purposes)
for( int i = 0; DXGI_ERROR_NOT_FOUND != factory->EnumAdapters( i, &adapter ); ++i );
{
// get the description of the adapter, assuming no failure
DXGI_ADAPTER_DESC adapterDesc;
HRESULT hr = adapter->GetDesc( &adapterDesc );
// Getting the outputs active on our adapter
EnumOutputsOnAdapter();
}
}
Suppose I have 3 monitors. How do I get the handle of the second one only by its index? EnumDisplayMonitors() won't work because it enumerates the pseudo-devices as well and EnumDisplayDevices() doesn't give me the handle.
You need to use EnumDisplayMonitors() instead of EnumDisplayDevices() to access the HMONITOR handle of each monitor.
However, monitors are not identified by index. GetMonitorInfo() can tell you which monitor is "primary", but that is all. There is no way to know which monitor is "second", "third", etc. And you can't use monitor locations to determine that, either, as the "second" monitor could be positioned anywhere in relation to the "primary" monitor, and then the "third" monitor can be positioned anywhere in relation to either "first" or "second" monitor.
So you have to hope that EnumDisplayMonitors() enumerates in the order that the monitors are installed, then you can do something like this:
struct sEnumInfo
{
int iIndex;
HMONITOR hMonitor;
};
BOOL CALLBACK GetMonitorByIndex(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData)
{
sEnumInfo *info = (sEnumInfo*) dwData;
if (--info->iIndex < 0)
{
info->hMonitor = hMonitor;
return FALSE;
}
return TRUE;
}
sEnumInfo info;
info.iIndex = 1;
info.hMonitor = NULL;
EnumDisplayMonitors(NULL, NULL, GetMonitorByIndex, (LPARAM)&info);
if (info.hMonitor != NULL)
{
//...
}
You can enumerate devices with EnumDisplayMonitors() and check if it is pseudo monitor with EnumDisplayDevices()
While you iterating through display monitors using GetMonitorInfo() you can get MONITORINFOEX with a name of a monitor's device.
Then using EnumDisplayDevices() you can get DISPLAY_DEVICE which contains StateFlags with info if current monitor is a pseudo monitor (or as in case bellow attached to desktop)
BOOL DispayEnumeratorProc(_In_ HMONITOR hMonitor, _In_ HDC hdcMonitor, _In_ LPRECT lprcMonitor, _In_ LPARAM dwData)
{
TClass* self = (TClass*)dwData;
if (self == nullptr)
return FALSE;
MONITORINFOEX monitorInfo;
::ZeroMemory(&monitorInfo, sizeof(monitorInfo));
monitorInfo.cbSize = sizeof(monitorInfo);
BOOL res = ::GetMonitorInfo(hMonitor, &monitorInfo);
if (res == FALSE)
return TRUE;
DISPLAY_DEVICE displayDevice;
::ZeroMemory(&displayDevice, sizeof(displayDevice));
displayDevice.cb = sizeof(displayDevice);
res = ::EnumDisplayDevices(monitorInfo.szDevice, 0, &displayDevice, 0);
if (res == FALSE)
return TRUE;
if (displayDevice.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)
self->RegisterDisplay(monitorInfo);
return TRUE;
}
void TClass::EnumerateDisplayMonitors()
{
BOOL res = ::EnumDisplayMonitors(NULL, NULL, &DispayEnumeratorProc, (LPARAM)this);
if (res == FALSE)
Print("Failed");
}
Also you can sort your monitors by iterating through EnumDisplayDevices()
If you pass NULL as first parameter to EnumDisplayDevices() it will return adapter's info based on second parameter. In this case your devices will have determined order.
You can compare DeviceName from DISPLAY_DEVICE with szDevice from MONITORINFOEX that you stored before to sort your HMONITORs
void TClass::SortDisplayMonitors()
{
DISPLAY_DEVICE displayDevice;
::ZeroMemory(&displayDevice, sizeof(displayDevice));
displayDevice.cb = sizeof(displayDevice);
std::map<std::string, DWORD> devices;
for (DWORD iDevNum = 0; ::EnumDisplayDevices(NULL, iDevNum, &displayDevice, 0) != FALSE; ++iDevNum)
devices.insert({displayDevice.DeviceName, iDevNum});
auto compare = [&devices](MONITORINFOEX& l, MONITORINFOEX& r)
{
DWORD il = -1;
DWORD ir = -1;
auto foundL = devices.lower_bound(l.szDevice);
if (foundL != devices.end())
il = foundL->second;
auto foundR = devices.lower_bound(r.szDevice);
if (foundR != devices.end())
ir = foundR->second;
return (il < ir);
};
std::sort(m_monitors.begin(), m_monitors.end(), compare);
}
PS: You can write
DWORD il = std::numeric_limits< DWORD >::max();
insted of
DWORD il = -1;
but don't forget to define NOMINMAX before you include Windows.h
you can exclude primary monitor, here is sample code (styles may vary) :
if DEVMODE dmPosition x == 0 and y == 0, then it is primary monitor.
For display devices only, a POINTL structure that indicates the
positional coordinates of the display device in reference to the
desktop area. The primary display device is always located at
coordinates (0,0).
check x, y to define second or third.
LONG second_x=0;
LONG second_y=0;
DWORD deviceNum = 0;
DISPLAY_DEVICE displayDevice;
DEVMODE devMode;
memset(&displayDevice, 0, sizeof(displayDevice));
displayDevice.cb = sizeof(DISPLAY_DEVICE);
while(EnumDisplayDevices(NULL, deviceNum, &displayDevice, 0))
{
EnumDisplaySettings(displayDevice.DeviceName, ENUM_CURRENT_SETTINGS, &devMode);
if (devMode.dmPosition.x == 0 && devMode.dmPosition.y == 0)
{
// primary monitor
}
else
{
// second or third monitor
second_x = devMode.dmPosition.x;
second_y = devMode.dmPosition.y;
}
++deviceNum;
}
m_pMainWnd->SetWindowPos(NULL,(int)second_x,(int)second_y,0,0,SWP_SHOWWINDOW | SWP_NOSIZE);
I am working though some simple DX tutorials, and have hit an early snag. I am working on both an old laptop and a new PC, so I'm using d3d10_1.lib which lets me use a 9 feature set. The PC, however, does support all the way to DX11, so nothing should be a problem on there.
So here's the function where it fails:
bool DirectX9Renderer::Initialise(HWND* handle)
{
//window handle
hWnd = handle;
//get window dimensions
RECT rc;
GetClientRect( *hWnd, &rc );
UINT width = rc.right - rc.left;
UINT height = rc.bottom - rc.top;
DXGI_SWAP_CHAIN_DESC swapChainDesc;
ZeroMemory(&swapChainDesc, sizeof(swapChainDesc));
//set buffer dimensions and format
swapChainDesc.BufferCount = 2;
swapChainDesc.BufferDesc.Width = width;
swapChainDesc.BufferDesc.Height = height;
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;;
//set refresh rate
swapChainDesc.BufferDesc.RefreshRate.Numerator = 60;
swapChainDesc.BufferDesc.RefreshRate.Denominator = 1;
//sampling settings
swapChainDesc.SampleDesc.Quality = 0;
swapChainDesc.SampleDesc.Count = 1;
//output window handle
swapChainDesc.OutputWindow = *hWnd;
swapChainDesc.Windowed = true;
HRESULT result = D3D10CreateDeviceAndSwapChain1( // this is line 57
NULL,
D3D10_DRIVER_TYPE_HARDWARE,
NULL,
D3D10_CREATE_DEVICE_SINGLETHREADED | D3D10_CREATE_DEVICE_DEBUG,
D3D10_FEATURE_LEVEL_9_1,
D3D10_1_SDK_VERSION,
&swapChainDesc,
&pSwapChain,
&pD3DDevice
);
if(FAILED(result))
{
return FatalError("D3D device creation failed");
}
// there's more stuff after this, but I don't get that far
}
So the call to D3D10CreateDeviceAndSwapChain1 fails with the less-helpful error code E_FAIL.
There is a line in the Debug output too:
First-chance exception at 0x770f56c4 in TileTest.exe: Microsoft C++ exception: _com_error at memory location 0x00b6e8d4..
I have tried using D3D10_DRIVER_TYPE_REFERENCE and different D3D10_FEATURE_LEVEL_xx values, but it doesn't seem to work.
I think the problem may have been to do with the D3D10_CREATE_DEVICE_FLAG I sent in. I changed the D3D10_CREATE_DEVICE_SINGLETHREADED | D3D10_CREATE_DEVICE_DEBUG to 0 and it now works.
I tried to create the device inside a VMware virtual machine. It failed (device stayed NULL) until I changed the requested FEATURE_LEVEL from D3D10_FEATURE_LEVEL_10_1 to D3D10_FEATURE_LEVEL_9_3. I've heard this also helps other PCs with real hardware.