Created
September 5, 2012 20:46
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Rendering directly to a composited window in vista+ with opengl.
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#define _WIN32_WINNT 0x0500 | |
#include <windows.h> | |
#include <windowsx.h> | |
#include <GL/gl.h> | |
#include <GL/glu.h> | |
#include <dwmapi.h> | |
#pragma comment (lib, "opengl32.lib") | |
#pragma comment (lib, "glu32.lib") | |
#pragma comment (lib, "dwmapi.lib") | |
#include <assert.h> | |
#include <tchar.h> | |
#ifdef assert | |
#define verify(expr) if(!expr) assert(0) | |
#else verify(expr) expr | |
#endif | |
const TCHAR szAppName[]=_T("TransparentGL"); | |
const TCHAR wcWndName[]=_T("TransparentGL"); | |
HDC hDC; | |
HGLRC m_hrc; | |
int w = 240; | |
int h = 240; | |
BOOL initSC() { | |
glEnable(GL_ALPHA_TEST); | |
glEnable(GL_DEPTH_TEST); | |
glEnable(GL_COLOR_MATERIAL); | |
glEnable(GL_LIGHTING); | |
glEnable(GL_LIGHT0); | |
glEnable(GL_BLEND); | |
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); | |
glClearColor(0, 0, 0, 0); | |
return 0; | |
} | |
void resizeSC(int width,int height) { | |
glViewport(0,0,width,height); | |
glMatrixMode(GL_PROJECTION); | |
glLoadIdentity(); | |
glMatrixMode(GL_MODELVIEW ); | |
glLoadIdentity(); | |
} | |
BOOL renderSC() { | |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); | |
glPushMatrix(); | |
glColor3f(0, 1, 1); | |
glBegin(GL_TRIANGLES); // Drawing Using Triangles | |
glColor3f(1.0f,0.0f,0.0f); // Set The Color To Red | |
glVertex3f( 0.0f, 1.0f, 0.0f); // Top | |
glColor3f(0.0f,1.0f,0.0f); // Set The Color To Green | |
glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left | |
glColor3f(0.0f,0.0f,1.0f); // Set The Color To Blue | |
glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right | |
glEnd(); | |
glPopMatrix(); | |
glFlush(); | |
return 0; | |
} | |
BOOL CreateHGLRC(HWND hWnd) { | |
PIXELFORMATDESCRIPTOR pfd = { | |
sizeof(PIXELFORMATDESCRIPTOR), | |
1, // Version Number | |
PFD_DRAW_TO_WINDOW | // Format Must Support Window | |
PFD_SUPPORT_OPENGL | // Format Must Support OpenGL | |
PFD_SUPPORT_COMPOSITION | // Format Must Support Composition | |
PFD_DOUBLEBUFFER, // Must Support Double Buffering | |
PFD_TYPE_RGBA, // Request An RGBA Format | |
32, // Select Our Color Depth | |
0, 0, 0, 0, 0, 0, // Color Bits Ignored | |
8, // An Alpha Buffer | |
0, // Shift Bit Ignored | |
0, // No Accumulation Buffer | |
0, 0, 0, 0, // Accumulation Bits Ignored | |
24, // 16Bit Z-Buffer (Depth Buffer) | |
8, // Some Stencil Buffer | |
0, // No Auxiliary Buffer | |
PFD_MAIN_PLANE, // Main Drawing Layer | |
0, // Reserved | |
0, 0, 0 // Layer Masks Ignored | |
}; | |
HDC hdc = GetDC(hWnd); | |
int PixelFormat = ChoosePixelFormat(hdc, &pfd); | |
if (PixelFormat == 0) { | |
assert(0); | |
return FALSE ; | |
} | |
BOOL bResult = SetPixelFormat(hdc, PixelFormat, &pfd); | |
if (bResult==FALSE) { | |
assert(0); | |
return FALSE ; | |
} | |
m_hrc = wglCreateContext(hdc); | |
if (!m_hrc){ | |
assert(0); | |
return FALSE; | |
} | |
ReleaseDC(hWnd, hdc); | |
return TRUE; | |
} | |
LRESULT CALLBACK WindowFunc(HWND hWnd,UINT msg, WPARAM wParam, LPARAM lParam) { | |
PAINTSTRUCT ps; | |
switch(msg) { | |
case WM_CREATE: | |
break; | |
case WM_DESTROY: | |
if(m_hrc) { | |
wglMakeCurrent(NULL, NULL); | |
wglDeleteContext(m_hrc) ; | |
} | |
PostQuitMessage(0) ; | |
break; | |
default: | |
return DefWindowProc(hWnd,msg,wParam,lParam); | |
} | |
return 0; | |
} | |
int WINAPI _tWinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst, LPSTR str,int nWinMode) { | |
WNDCLASSEX wc; | |
memset(&wc, 0, sizeof(wc)); | |
wc.cbSize = sizeof(WNDCLASSEX); | |
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); | |
wc.style = CS_HREDRAW | CS_VREDRAW; | |
wc.lpfnWndProc = (WNDPROC)WindowFunc; | |
wc.cbClsExtra = 0; | |
wc.cbWndExtra = 0; | |
wc.hInstance = hThisInst; | |
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); | |
wc.hCursor = LoadCursor(NULL, IDC_ARROW); | |
wc.hbrBackground = (HBRUSH)CreateSolidBrush(0x00000000); | |
wc.lpszClassName = szAppName; | |
if(!RegisterClassEx(&wc)) { | |
MessageBox(NULL, _T("RegisterClassEx - failed"), _T("Error"), MB_OK | MB_ICONERROR); | |
return FALSE; | |
} | |
HWND hWnd = CreateWindowEx(WS_EX_APPWINDOW, szAppName, wcWndName, | |
WS_VISIBLE | WS_POPUP, 200, 150, w, h, | |
NULL, NULL, hThisInst, NULL); | |
if(!hWnd) { | |
MessageBox(NULL, _T("CreateWindowEx - failed"), _T("Error"), MB_OK | MB_ICONERROR); | |
return FALSE; | |
} | |
DWM_BLURBEHIND bb = {0}; | |
HRGN hRgn = CreateRectRgn(0, 0, -1, -1); | |
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION; | |
bb.hRgnBlur = hRgn; | |
bb.fEnable = TRUE; | |
DwmEnableBlurBehindWindow(hWnd, &bb); | |
CreateHGLRC(hWnd); | |
HDC hdc = GetDC(hWnd); | |
wglMakeCurrent(hdc, m_hrc); | |
initSC(); | |
resizeSC(w, h); | |
ReleaseDC(hWnd, hdc); | |
MSG msg; | |
while(1) { | |
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { | |
TranslateMessage(&msg); | |
DispatchMessage(&msg); | |
} | |
else { | |
HDC hdc = GetDC(hWnd); | |
wglMakeCurrent(hdc, m_hrc); | |
renderSC(); | |
SwapBuffers(hdc); | |
ReleaseDC(hWnd, hdc); | |
} | |
} | |
return (FALSE); | |
} |
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I would like to achieve this effect in mfc,how I achieve in MFC?Please help me!