효과를 적용하는 방법
참고
Windows 10 앱의 경우 DirectComposition 대신 Windows.UI.Composition API를 사용하는 것이 좋습니다. 자세한 내용은 시각적 계층을 사용하여 데스크톱 앱 현대화를 참조하세요.
이 항목에서는 Microsoft DirectComposition을 사용하여 시각적 개체에 효과 및 3D 변환을 적용하는 방법을 보여 줍니다. 이 항목의 예제에서는 시각적 개체의 불투명도를 변경하고 시각적 개체의 중앙에 있는 세로 축을 중심으로 회전합니다. DirectComposition에서 지원하는 다른 효과에 대한 자세한 내용은 효과를 참조하세요.
알아야 하는 작업
기술
필수 구성 요소
- C/C++
- Microsoft Win32
- COM(구성 요소 개체 모델)
지침
1단계: DirectComposition 개체 초기화
- 디바이스 개체 및 컴퍼지션 대상 개체를 만듭니다.
- 시각적 개체를 만들고, 해당 콘텐츠를 설정하고, 시각적 트리에 추가합니다.
자세한 내용은 DirectComposition을 초기화하는 방법을 참조하세요.
2단계: 3D 회전 변환 개체, 효과 그룹 개체 및 애니메이션 개체 만들기
IDCompositionDevice::CreateRotateTransform3D 메서드를 사용하여 3D 회전 변환 개체를 만들고 CreateEffectGroup 메서드를 사용하여 효과 그룹 개체를 만듭니다. 이 예제에서는 CreateAnimation 메서드를 사용하여 3D 회전 변환에 애니메이션 효과를 주는 애니메이션 개체를 만듭니다. 애니메이션 적용에 대한 자세한 내용은 애니메이션을 적용하는 방법을 참조하세요.
HRESULT hr = S_OK;
IDCompositionAnimation *pAnimation = nullptr;
IDCompositionRotateTransform3D *pRotate3D = nullptr;
IDCompositionEffectGroup *pEffectGroup = nullptr;
// Create a 3D rotate transform object.
hr = m_pDevice->CreateRotateTransform3D(&pRotate3D);
if (SUCCEEDED(hr))
{
// Create an effect group object.
hr = m_pDevice->CreateEffectGroup(&pEffectGroup);
}
if (SUCCEEDED(hr))
{
// Create an animation object.
hr = m_pDevice->CreateAnimation(&pAnimation);
}
3단계: 애니메이션 함수 정의
IDCompositionAnimation 개체의 메서드를 사용하여 애니메이션 함수를 정의합니다.
다음 예제에서는 간단한 애니메이션 함수를 정의합니다. 개체 속성에 적용하면 애니메이션 함수는 1초 동안 속성 값을 0에서 degrees 인수 값으로 증분 방식으로 변경합니다.
if (SUCCEEDED(hr))
{
// Define the animation function.
pAnimation->AddCubic(0.0f, 0.0f, degrees, 0.0f, 0.0f);
pAnimation->End(1.0f, degrees);
4단계: 3D 회전 변환의 속성 설정
- IDCompositionRotateTransform3D::SetAngle 메서드를 호출하여 3D 회전 변환의 Angle 속성에 애니메이션 함수를 적용합니다.
- IDCompositionRotateTransform3D::SetAxisX, SetAxisY 및 SetAxisZ 메서드를 호출하여 3D 회전 변환의 회전 축을 설정합니다.
- IDCompositionRotateTransform3D::SetCenterX 및 SetCenterY 메서드를 호출하여 3D 회전 변환의 회전 중심을 설정합니다.
다음 예제에서는 시각적 개체의 중앙에 있는 세로 축을 중심으로 시각적 개체를 회전하기 위한 3D 회전 변환을 설정합니다. m_bitmapWidth 및 m_bitmapHeight 매개 변수는 비트맵의 너비와 높이(픽셀)입니다.
// Set the properties of the rotate transform object.
//
// Apply the animation object to the Angle property so that
// the visual will appear to spin around an axis.
pRotate3D->SetAngle(pAnimation);
// Set a vertical axis through the center of the visual's bitmap.
pRotate3D->SetAxisX(0.0f);
pRotate3D->SetAxisY(1.0f);
pRotate3D->SetAxisZ(0.0f);
// Set the center of rotation to the center of the visual's bitmap.
pRotate3D->SetCenterX(m_bitmapWidth / 2.0f);
pRotate3D->SetCenterY(m_bitmapHeight / 2.0f);
}
5단계: 효과 그룹 개체의 속성 설정
- IDCompositionEffectGroup::SetTransform3D 메서드를 호출하여 효과 그룹 개체의 Transform3D 속성에 3D 회전 변환 개체를 적용합니다.
- IDCompositionEffectGroup::SetOpacity를 호출하여 효과 그룹 개체의 Opacity 속성을 설정합니다.
if (SUCCEEDED(hr))
{
// Apply the rotate transform object to the Tranform3D property
// of the effect group object.
hr = pEffectGroup->SetTransform3D(pRotate3D);
}
if (SUCCEEDED(hr))
{
// Set the Opacity of the effect group object.
hr = pEffectGroup->SetOpacity(opacity);
}
6단계: 효과 그룹 개체를 시각적 개체의 Effect 속성에 적용
IDCompositionVisual::SetEffect 메서드를 호출하여 효과 그룹 개체를 시각적 개체에 적용합니다.
if (SUCCEEDED(hr))
{
// Apply the effect group object to the Effect property of the visual.
hr = pVisual->SetEffect(pEffectGroup);
}
7단계: 컴퍼지션 커밋
IDCompositionDevice::Commit 메서드를 호출하여 처리를 위해 명령 일괄 처리를 DirectComposition에 커밋합니다. 결과 컴퍼지션이 대상 창에 나타납니다.
if (SUCCEEDED(hr))
{
// Commit the visual to DirectComposition.
hr = m_pDevice->Commit();
}
8단계: DirectComposition 개체 해제
애니메이션 개체, 3D 회전 변환 개체 및 효과 그룹 개체가 더 이상 필요하지 않은 경우 해제해야 합니다. 다음 예제에서는 애플리케이션 정의 SafeRelease 매크로를 호출하여 개체를 해제합니다.
// Release the DirectComposition objects.
SafeRelease(&pAnimation);
SafeRelease(&pRotate3D);
SafeRelease(&pEffectGroup);
또한 애플리케이션이 종료되기 전에 디바이스 개체, 컴퍼지션 대상 개체 및 시각적 개체를 해제해야 합니다. 자세한 내용은 DirectComposition을 초기화하는 방법을 참조하세요.
전체 예제
//
// ApplyEffects.h
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved
#pragma once
// Modify the following definitions if you need to target a platform prior to the ones specified below.
#ifndef WINVER // Allow use of features specific to Windows 7 or later.
#define WINVER 0x0700 // Change this to the appropriate value to target other versions of Windows.
#endif
#ifndef _WIN32_WINNT // Allow use of features specific to Windows 7 or later.
#define _WIN32_WINNT 0x0700 // Change this to the appropriate value to target other versions of Windows.
#endif
#ifndef UNICODE
#define UNICODE
#endif
#define WIN32_LEAN_AND_MEAN // Exclude rarely-used items from Windows headers
// Windows Header Files:
#include <windows.h>
// C RunTime Header Files
#include <math.h>
// DirectComposition and Direct3D Header Files
#include <dcomp.h>
#include <d3d11.h>
/******************************************************************
* *
* Macros *
* *
******************************************************************/
template<class Interface>
inline void
SafeRelease(
Interface **ppInterfaceToRelease
)
{
if (*ppInterfaceToRelease != NULL)
{
(*ppInterfaceToRelease)->Release();
(*ppInterfaceToRelease) = NULL;
}
}
#ifndef HINST_THISCOMPONENT
EXTERN_C IMAGE_DOS_HEADER __ImageBase;
#define HINST_THISCOMPONENT ((HINSTANCE)&__ImageBase)
#endif
/******************************************************************
* *
* DemoApp *
* *
******************************************************************/
class DemoApp
{
public:
DemoApp();
~DemoApp();
HRESULT Initialize();
void RunMessageLoop();
private:
HRESULT InitializeDirectCompositionDevice();
HRESULT CreateResources();
void DiscardResources();
HRESULT OnPaint();
HRESULT OnClientClick(int xPos, int yPos);
HRESULT OnMouseMove(int xPos, int yPos);
HRESULT LoadResourceGDIBitmap(
PCWSTR resourceName,
HBITMAP &hbmp
);
HRESULT MyCreateGDIRenderedDCompSurface(HBITMAP hBitmap,
IDCompositionSurface **ppSurface);
HRESULT SetVisualOpacity(IDCompositionVisual *pVisual, float opacity);
HRESULT RotateVisual(IDCompositionVisual *pVisual,float degrees);
static LRESULT CALLBACK WndProc(
HWND hWnd,
UINT message,
WPARAM wParam,
LPARAM lParam
);
private:
HWND m_hwnd;
HBITMAP m_hBitmap;
int m_bitmapWidth;
int m_bitmapHeight;
ID3D11Device *m_pD3D11Device;
IDCompositionDevice *m_pDevice;
IDCompositionTarget *m_pCompTarget;
IDCompositionVisual *m_pVisual;
};
//
// ApplyEffects.cpp
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved
// Instructions: Hover over the image to see the opacity change. Click
// the image to apply a 3D rotation.
#include "ApplyEffects.h"
#define OFFSET_X 20
#define OFFSET_Y 20
#define TRANSPARENT 0.5
#define OPAQUE 1.0
/******************************************************************
* *
* The application entry point. *
* *
******************************************************************/
int WINAPI WinMain(
HINSTANCE /* hInstance */,
HINSTANCE /* hPrevInstance */,
LPSTR /* lpCmdLine */,
int /* nCmdShow */
)
{
// Ignore the return value because we want to run the program even in the
// unlikely event that HeapSetInformation fails.
HeapSetInformation(NULL, HeapEnableTerminationOnCorruption, NULL, 0);
if (SUCCEEDED(CoInitialize(NULL)))
{
{
DemoApp app;
if (SUCCEEDED(app.Initialize()))
{
app.RunMessageLoop();
}
}
CoUninitialize();
}
return 0;
}
/******************************************************************
* *
* DemoApp::DemoApp constructor *
* *
* Initialize member data. *
* *
******************************************************************/
DemoApp::DemoApp() :
m_hwnd(NULL),
m_hBitmap(NULL),
m_pDevice(nullptr),
m_pCompTarget(nullptr),
m_pD3D11Device(nullptr),
m_pVisual(nullptr),
m_bitmapHeight(0),
m_bitmapWidth(0)
{
}
/******************************************************************
* *
* Release resources. *
* *
******************************************************************/
DemoApp::~DemoApp()
{
SafeRelease(&m_pDevice);
SafeRelease(&m_pCompTarget);
SafeRelease(&m_pD3D11Device);
SafeRelease(&m_pVisual);
}
/*******************************************************************
* *
* Create the application window. *
* *
*******************************************************************/
HRESULT DemoApp::Initialize()
{
HRESULT hr;
// Register the window class.
WNDCLASSEX wcex = { sizeof(WNDCLASSEX) };
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = DemoApp::WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = sizeof(LONG_PTR);
wcex.hInstance = HINST_THISCOMPONENT;
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.lpszClassName = L"DirectCompDemoApp";
RegisterClassEx(&wcex);
// Create the application window.
//
// Because the CreateWindow function takes its size in pixels, we
// obtain the system DPI and use it to scale the window size.
int dpiX = 0;
int dpiY = 0;
HDC hdc = GetDC(NULL);
if (hdc)
{
dpiX = GetDeviceCaps(hdc, LOGPIXELSX);
dpiY = GetDeviceCaps(hdc, LOGPIXELSY);
ReleaseDC(NULL, hdc);
}
m_hwnd = CreateWindow(
L"DirectCompDemoApp",
L"DirectComposition Demo Application",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
static_cast<UINT>(ceil(640.f * dpiX / 96.f)),
static_cast<UINT>(ceil(480.f * dpiY / 96.f)),
NULL,
NULL,
HINST_THISCOMPONENT,
this
);
hr = m_hwnd ? S_OK : E_FAIL;
if (SUCCEEDED(hr))
{
// Initialize DirectComposition resources, such as the
// device object and composition target object.
hr = InitializeDirectCompositionDevice();
}
if (SUCCEEDED(hr))
{
hr = CreateResources();
}
if (SUCCEEDED(hr))
{
ShowWindow(m_hwnd, SW_SHOWNORMAL);
UpdateWindow(m_hwnd);
}
return hr;
}
/******************************************************************
* *
* This method creates the DirectComposition device object and *
* and the composition target object. These objects endure for *
* the lifetime of the application. *
* *
******************************************************************/
HRESULT DemoApp::InitializeDirectCompositionDevice()
{
HRESULT hr = S_OK;
D3D_FEATURE_LEVEL featureLevelSupported;
// Create the D3D device object.
D3D11CreateDevice(
nullptr,
D3D_DRIVER_TYPE_HARDWARE,
NULL,
D3D11_CREATE_DEVICE_BGRA_SUPPORT,
NULL,
0,
D3D11_SDK_VERSION,
&m_pD3D11Device,
&featureLevelSupported,
NULL);
IDXGIDevice *pDXGIDevice = nullptr;
hr = (m_pD3D11Device == nullptr) ? E_UNEXPECTED : S_OK;
if (SUCCEEDED(hr))
{
// Create the DXGI device used to create bitmap surfaces.
hr = m_pD3D11Device->QueryInterface(&pDXGIDevice);
}
if (SUCCEEDED(hr))
{
// Create the DirectComposition device object.
hr = DCompositionCreateDevice(pDXGIDevice,
__uuidof(IDCompositionDevice),
reinterpret_cast<void **>(&m_pDevice));
}
if (SUCCEEDED(hr))
{
// Create the composition target object.
hr = m_pDevice->CreateTargetForHwnd(m_hwnd, TRUE, &m_pCompTarget);
}
SafeRelease(&pDXGIDevice);
return hr;
}
/******************************************************************
* *
* This method creates the GDI bitmap that the application gives *
* to DirectComposition to be composed. *
* *
******************************************************************/
HRESULT DemoApp::CreateResources()
{
HRESULT hr = S_OK;
hr = LoadResourceGDIBitmap(L"Penguins", m_hBitmap);
return hr;
}
/******************************************************************
* *
* Discard device-specific resources. *
* *
******************************************************************/
void DemoApp::DiscardResources()
{
DeleteObject(m_hBitmap);
}
/******************************************************************
* *
* The main window's message loop. *
* *
******************************************************************/
void DemoApp::RunMessageLoop()
{
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
/******************************************************************
* *
* Called when the application's main window is painted. This *
* method builds a simple visual tree and passes it to *
* DirectComposition. *
* *
******************************************************************/
HRESULT DemoApp::OnPaint()
{
HRESULT hr = S_OK;
IDCompositionSurface *pSurface = nullptr;
// Create a visual object.
hr = m_pDevice->CreateVisual(&m_pVisual);
if (SUCCEEDED(hr))
{
// Create a composition surface and render a GDI bitmap
// to the surface.
hr = MyCreateGDIRenderedDCompSurface(m_hBitmap, &pSurface);
}
if (SUCCEEDED(hr))
{
// Set the bitmap content of the visual.
hr = m_pVisual->SetContent(pSurface);
}
if (SUCCEEDED(hr))
{
// Set the horizontal and vertical position of the visual relative
// to the upper-left corner of the composition target window.
m_pVisual->SetOffsetX(OFFSET_X);
m_pVisual->SetOffsetY(OFFSET_Y);
hr = SetVisualOpacity(m_pVisual, TRANSPARENT);
}
if (SUCCEEDED(hr))
{
// Set the visual to be the root of the visual tree.
hr = m_pCompTarget->SetRoot(m_pVisual);
}
if (SUCCEEDED(hr))
{
// Commit the visual to be composed and displayed.
hr = m_pDevice->Commit();
}
return hr;
}
/******************************************************************
* *
* Called when the mouse moves in the main window's client area. *
* This method determines whether the mouse cursor is over the *
* visual, and calls an application-defined function to set the *
* visual's opacity. *
* *
******************************************************************/
HRESULT DemoApp::OnMouseMove(int xPos, int yPos)
{
HRESULT hr = S_OK;
static BOOL fOverImage = FALSE;
// Determine whether the cursor is over the visual.
if ((xPos >= OFFSET_X && xPos <= (OFFSET_X + m_bitmapWidth))
&& (yPos >= OFFSET_Y && yPos <= (OFFSET_Y + m_bitmapHeight)))
{
if (!fOverImage)
{
// The cursor has moved over the visual, so make the visual
// 100% opaque.
hr = SetVisualOpacity(m_pVisual, OPAQUE);
fOverImage = TRUE;
}
}
else if (fOverImage)
{
// The cursor has moved off the visual, so make the visual
// 50% opaque.
hr = SetVisualOpacity(m_pVisual, TRANSPARENT);
fOverImage = FALSE;
}
return hr;
}
/******************************************************************
* *
* Changes the opacity of a visual. *
* *
******************************************************************/
HRESULT DemoApp::SetVisualOpacity(IDCompositionVisual *pVisual, float opacity)
{
HRESULT hr = S_OK;
IDCompositionEffectGroup *pEffectGroup = nullptr;
// Validate the input arguments.
if (pVisual == NULL || (opacity > 1.0f || opacity < 0.0f))
return E_INVALIDARG;
// Create an effect group object.
hr = m_pDevice->CreateEffectGroup(&pEffectGroup);
if (SUCCEEDED(hr))
{
// Set the Opacity of the effect group object.
hr = pEffectGroup->SetOpacity(opacity);
}
if (SUCCEEDED(hr))
{
// Apply the effect group object to the Effect property of the visual.
hr = m_pVisual->SetEffect(pEffectGroup);
}
if (SUCCEEDED(hr))
{
// Commit the visual to DirectComposition.
hr = m_pDevice->Commit();
}
// Free the effect group object.
SafeRelease(&pEffectGroup);
return hr;
}
/******************************************************************
* *
* Called when the user clicks in the main window's client area. *
* This method determines whether the mouse cursor is over the *
* visual and calls an application-defined function to rotate the *
* visual. *
* *
******************************************************************/
HRESULT DemoApp::OnClientClick(int xPos, int yPos)
{
HRESULT hr = S_OK;
// Determine whether the mouse cursor is over the visual. If so,
// rotate the visual.
if ((xPos >= OFFSET_X && xPos <= (OFFSET_X + m_bitmapWidth))
&& (yPos >= OFFSET_Y && yPos <= (OFFSET_Y + m_bitmapHeight)))
{
hr = RotateVisual(m_pVisual, 360.0f);
}
return hr;
}
/******************************************************************
* *
* Performs an animated 3D rotation of a visual. *
* *
******************************************************************/
HRESULT DemoApp::RotateVisual(IDCompositionVisual *pVisual, float degrees)
{
HRESULT hr = S_OK;
IDCompositionAnimation *pAnimation = nullptr;
IDCompositionRotateTransform3D *pRotate3D = nullptr;
IDCompositionEffectGroup *pEffectGroup = nullptr;
// Validate the input arguments.
if (pVisual == NULL || (degrees > 360.0f || degrees < -360.0f))
return E_INVALIDARG;
// Create a 3D rotate transform object.
hr = m_pDevice->CreateRotateTransform3D(&pRotate3D);
if (SUCCEEDED(hr))
{
// Create an effect group object.
hr = m_pDevice->CreateEffectGroup(&pEffectGroup);
}
if (SUCCEEDED(hr))
{
// Create an animation object.
hr = m_pDevice->CreateAnimation(&pAnimation);
}
if (SUCCEEDED(hr))
{
// Define the animation function.
pAnimation->AddCubic(0.0f, 0.0f, degrees, 0.0f, 0.0f);
pAnimation->End(1.0f, degrees);
// Set the properties of the rotate transform object.
//
// Apply the animation object to the Angle property so that
// the visual will appear to spin around an axis.
pRotate3D->SetAngle(pAnimation);
// Set a vertical axis through the center of the visual's bitmap.
pRotate3D->SetAxisX(0.0f);
pRotate3D->SetAxisY(1.0f);
pRotate3D->SetAxisZ(0.0f);
// Set the center of rotation to the center of the visual's bitmap.
pRotate3D->SetCenterX(m_bitmapWidth / 2.0f);
pRotate3D->SetCenterY(m_bitmapHeight / 2.0f);
}
if (SUCCEEDED(hr))
{
// Apply the rotate transform object to the Tranform3D property
// of the effect group object.
hr = pEffectGroup->SetTransform3D(pRotate3D);
}
if (SUCCEEDED(hr))
{
// Apply the effect group object to the Effect property of the visual.
hr = pVisual->SetEffect(pEffectGroup);
}
if (SUCCEEDED(hr))
{
// Commit the visual to DirectComposition.
hr = m_pDevice->Commit();
}
// Release the DirectComposition objects.
SafeRelease(&pAnimation);
SafeRelease(&pRotate3D);
SafeRelease(&pEffectGroup);
return hr;
}
/******************************************************************
* *
* The window's message handler. *
* *
******************************************************************/
LRESULT CALLBACK DemoApp::WndProc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
LRESULT result = 0;
if (message == WM_CREATE)
{
LPCREATESTRUCT pcs = (LPCREATESTRUCT)lParam;
DemoApp *pDemoApp = (DemoApp *)pcs->lpCreateParams;
::SetWindowLongPtrW(
hwnd,
GWLP_USERDATA,
PtrToUlong(pDemoApp)
);
result = 1;
}
else
{
DemoApp *pDemoApp = reinterpret_cast<DemoApp *>(static_cast<LONG_PTR>(
::GetWindowLongPtrW(
hwnd,
GWLP_USERDATA
)));
bool wasHandled = false;
if (pDemoApp)
{
switch (message)
{
case WM_LBUTTONDOWN:
{
pDemoApp->OnClientClick(LOWORD(lParam), HIWORD(lParam));
}
wasHandled = true;
result = 0;
break;
case WM_MOUSEMOVE:
{
pDemoApp->OnMouseMove(LOWORD(lParam), HIWORD(lParam));
}
wasHandled = true;
result = 0;
break;
case WM_PAINT:
{
pDemoApp->OnPaint();
ValidateRect(hwnd, NULL);
}
wasHandled = true;
result = 0;
break;
case WM_DISPLAYCHANGE:
{
InvalidateRect(hwnd, NULL, FALSE);
}
wasHandled = true;
result = 0;
break;
case WM_DESTROY:
{
PostQuitMessage(0);
pDemoApp->DiscardResources();
}
wasHandled = true;
result = 1;
break;
}
}
if (!wasHandled)
{
result = DefWindowProc(hwnd, message, wParam, lParam);
}
}
return result;
}
/******************************************************************
* *
* This method loads the specified GDI bitmap from the *
* application resources, creates a new bitmap that is in a *
* format that DirectComposition can use, and copies the contents *
* of the original bitmap to the new bitmap. *
* *
******************************************************************/
HRESULT DemoApp::LoadResourceGDIBitmap(PCWSTR resourceName, HBITMAP &hbmp)
{
hbmp = static_cast<HBITMAP>(LoadImageW(HINST_THISCOMPONENT, resourceName,
IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR));
return hbmp ? S_OK : E_FAIL;
}
// CreateGDIRenderedDCompSurface - Creates a DirectComposition surface and
// copies the bitmap to the surface.
//
// Parameters:
// hBitmap - a GDI bitmap.
// ppSurface - the composition surface object.
//
HRESULT DemoApp::MyCreateGDIRenderedDCompSurface(HBITMAP hBitmap,
IDCompositionSurface **ppSurface)
{
HRESULT hr = S_OK;
int bmpSize = 0;
BITMAP bmp = { };
HBITMAP hBitmapOld = NULL;
HDC hSurfaceDC = NULL;
HDC hBitmapDC = NULL;
IDXGISurface1 *pDXGISurface = nullptr;
IDCompositionSurface *pDCSurface = nullptr;
POINT pointOffset = { };
hr = hBitmap ? S_OK : E_FAIL;
if (SUCCEEDED(hr))
{
// Get information about the bitmap.
bmpSize = GetObject(hBitmap, sizeof(BITMAP), &bmp);
}
hr = bmpSize ? S_OK : E_FAIL;
if (SUCCEEDED(hr))
{
// Save the bitmap dimensions.
m_bitmapWidth = bmp.bmWidth;
m_bitmapHeight = bmp.bmHeight;
// Create a DirectComposition-compatible surface that is the same size
// as the bitmap.
hr = m_pDevice->CreateSurface(m_bitmapWidth, m_bitmapHeight,
DXGI_FORMAT_B8G8R8A8_UNORM, DXGI_ALPHA_MODE_IGNORE, &pDCSurface);
}
hr = pDCSurface ? S_OK : E_FAIL;
if (SUCCEEDED(hr))
{
// Begin rendering to the surface.
hr = pDCSurface->BeginDraw(NULL, __uuidof(IDXGISurface1),
reinterpret_cast<void**>(&pDXGISurface), &pointOffset);
}
if (SUCCEEDED(hr))
{
// Get the device context (DC) for the surface.
pDXGISurface->GetDC(FALSE, &hSurfaceDC);
}
hr = hSurfaceDC ? S_OK : E_FAIL;
if (SUCCEEDED(hr))
{
// Create a compatible (DC) and select the surface
// into the DC.
hBitmapDC = CreateCompatibleDC(hSurfaceDC);
if (hBitmapDC != NULL)
{
hBitmapOld = (HBITMAP)SelectObject(hBitmapDC, hBitmap);
BitBlt(hSurfaceDC, pointOffset.x, pointOffset.y,
m_bitmapWidth, m_bitmapHeight, hBitmapDC, 0, 0, SRCCOPY);
if (hBitmapOld)
{
SelectObject(hBitmapDC, hBitmapOld);
}
DeleteDC(hBitmapDC);
}
pDXGISurface->ReleaseDC(NULL);
}
// End the rendering.
pDCSurface->EndDraw();
*ppSurface = pDCSurface;
SafeRelease(&pDXGISurface);
return hr;
}