LRESULT CALLBACK
ChildWndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
{
HDC hdcMem;
HBITMAP hbmp, hbmpOrg;
RECT rc;
PAINTSTRUCT ps;
switch(msg) {
case WM_PAINT:
BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rc);
/* redirect painting to offscreen dc*/
hdcMem = CreateCompatibleDC(ps.hdc);
hbmp = CreateCompatibleBitmap(hdcMem, image->width, image->height);
hbmpOrg = SelectObject(hdcMem, hbmp);
/* draw onto offscreen dc*/
DrawDIB(hdcMem, 0, 0, image);
/* stretch blit offscreen with physical screen*/
StretchBlt(ps.hdc, 0, 0, rc.right, rc.bottom, hdcMem,
0, 0, image->width, image->height, MWROP_COPY);
DeleteObject(SelectObject(hdcMem, hbmpOrg));
DeleteDC(hdcMem);
EndPaint(hwnd, &ps);
break;
default:
return DefWindowProc( hwnd, msg, wp, lp);
}
return 0;
}
void COXImageViewer::OnPaint()
{
CPaintDC dc(this); // device context for painting
if(m_dib.IsEmpty())
return;
// TODO: Add your message handler code here
OnPrepareDC(&dc);
// get the size of image
CSize sizeDIB=GetDIBSize();
CRect rect(0,0,sizeDIB.cx,sizeDIB.cy);
CRect rectPaint=rect;
// transform coordinates of boundary rectangle
// taking into account current zoom level
NormalToScaled(&rectPaint);
///
// we have to revert Y-coordinates
// to get right print output
UINT diff=rect.bottom-rect.top;
rect.bottom=sizeDIB.cy-rect.top;
rect.top=rect.bottom-diff;
///
DrawDIB(&dc,rectPaint,rect);
// Do not call COXScrollWnd::OnPaint() for painting messages
}
LRESULT CALLBACK
ChildWndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
{
RECT rc;
PAINTSTRUCT ps;
switch(msg) {
case WM_PAINT:
BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rc);
#if USEBLIT
{
HDC hdcMem;
HBITMAP hbmp, hbmpOrg;
/* redirect painting to offscreen dc, then use blit function*/
hdcMem = CreateCompatibleDC(ps.hdc);
hbmp = CreateCompatibleBitmap(hdcMem, rc.right, rc.bottom);
hbmpOrg = SelectObject(hdcMem, hbmp);
/* draw onto offscreen dc*/
DrawDIB(hdcMem, 0, 0, image);
/* blit offscreen with physical screen*/
BitBlt(ps.hdc, 0, 0, rc.right, rc.bottom, hdcMem,
0, 0, MWROP_SRCCOPY);
/*StretchBlt(ps.hdc, 0, 0, rc.right, rc.bottom, hdcMem,
0, 0, image->width/3*5, image->height/3*4, MWROP_SRCCOPY);*/
DeleteObject(SelectObject(hdcMem, hbmpOrg));
DeleteDC(hdcMem);
}
#else
DrawDIB(ps.hdc, rc.left, rc.top, image);
#endif
EndPaint(hwnd, &ps);
break;
default:
return DefWindowProc( hwnd, msg, wp, lp);
}
return( 0);
}
void CVideoDlg::OnReceiveComplete(void)
{
m_nCount++;
switch (m_pContext->m_DeCompressionBuffer.GetBuffer(0)[0])
{
case TOKEN_WEBCAM_DIB:
{
DrawDIB(); //这里是绘图函数，转到他的代码看一下
break;
}
}
}
void CWebCamDlg::OnReceiveComplete()
{
m_nCount++;
switch (m_pContext->m_DeCompressionBuffer.GetBuffer(0)[0])
{
case TOKEN_WEBCAM_DIB:
DrawDIB();
break;
default:
// 传输发生异常数据
SendException();
break;
}
}
void CDIBitmap :: DrawDIB( CDC* pDC, int x, int y ) {
DrawDIB( pDC, x, y, GetWidth(), GetHeight() );
}
HBITMAP KDIB::TransformBitmap(XFORM * xm, COLORREF crBack, int method)
{
int x0, y0, x1, y1, x2, y2, x3, y3;
Map(xm, 0, 0, x0, y0); // 0 1
Map(xm, m_nWidth, 0, x1, y1); //
Map(xm, 0, m_nHeight, x2, y2); // 2 3
Map(xm, m_nWidth, m_nHeight, x3, y3);
int xmin, xmax;
int ymin, ymax;
minmax(x0, x1, x2, x3, xmin, xmax);
minmax(y0, y1, y2, y3, ymin, ymax);
int destwidth = xmax - xmin;
int destheight = ymax - ymin;
KBitmapInfo dest;
dest.SetFormat(destwidth, destheight, m_pBMI->bmiHeader.biBitCount, m_pBMI->bmiHeader.biCompression);
if ( m_nClrUsed )
memcpy(dest.m_dibinfo.bmiColors, m_pRGBQUAD, sizeof(RGBQUAD) * m_nClrUsed);
// create destination DIB section
BYTE * pBits;
HBITMAP hBitmap = CreateDIBSection(NULL, dest.GetBMI(), DIB_RGB_COLORS, (void **) & pBits, NULL, NULL);
if ( hBitmap==NULL )
{
assert(false);
return NULL;
}
// For testing GDI GetPixel speed, we need a HDC for the source bitmap
HBITMAP hSrcBmp = NULL;
HDC hSrcDC = NULL;
HGDIOBJ hSrcOld = NULL;
if ( method==method_gdi )
{
hSrcBmp = CreateDIBSection(NULL, m_pBMI, DIB_RGB_COLORS, (void **) & pBits, NULL, NULL);
assert(hSrcBmp);
hSrcDC = CreateCompatibleDC(NULL);
hSrcOld = SelectObject(hSrcDC, hSrcBmp);
// copy pixels from DIB to source DIB section
DrawDIB(hSrcDC, 0, 0, m_nWidth, m_nHeight, 0, 0, m_nWidth, m_nHeight, SRCCOPY);
}
// clear DIB section to background color
HDC hDstDC = CreateCompatibleDC(NULL);
HGDIOBJ hDstOld = SelectObject(hDstDC, hBitmap);
HBRUSH hBrush = CreateSolidBrush(crBack);
RECT rect = { 0, 0, destwidth, destheight };
FillRect(hDstDC, & rect, hBrush);
DeleteObject(hBrush);
KDIB destDIB;
destDIB.AttachDIB(dest.GetBMI(), pBits, 0);
POINT P[3] = { { x0-xmin, y0-ymin }, { x1-xmin, y1-ymin }, { x2-xmin, y2-ymin } };
dibtick = GetTickCount();
if ( (m_nBitCount<=8) && (method==method_24bpp) )
method = method_direct;
switch ( method )
{
case method_gdi:
destDIB.PlgBltGetPixel(P, hSrcDC, 0, 0, m_nWidth, m_nHeight, hDstDC);
break;
case method_direct:
destDIB.PlgBlt(P, this, 0, 0, m_nWidth, m_nHeight);
break;
case method_24bpp:
destDIB.PlgBlt24(P, this, 0, 0, m_nWidth, m_nHeight);
break;
}
dibtick = GetTickCount() - dibtick;
SelectObject(hDstDC, hDstOld);
DeleteObject(hDstDC);
if ( method==method_gdi )
{
SelectObject(hSrcDC, hSrcOld);
DeleteObject(hSrcDC);
DeleteObject(hSrcBmp);
}
return hBitmap;
}
LRESULT CALLBACK
WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
{
PAINTSTRUCT ps;
HDC hdc;
#if CLIENT3D | IMAGE | GRAPH3D
RECT rc;
#endif
#if GRAPH3D
static int countup = 1;
int id;
static vec1 gx, gy;
#endif
#if TIMERDEMO
static POINT mousept;
#endif
#if ARCDEMO
static int startdegrees = 0;
static int enddegrees = 30;
#endif
switch( msg) {
#if TIMERDEMO
case WM_CREATE:
SetTimer(hwnd, 1, 100, NULL);
mousept.x = 60;
mousept.y = 20;
break;
case WM_TIMER:
#if GRAPH3D
GetClientRect(hwnd, &rc);
if(countup) {
mousept.y += 20;
if(mousept.y >= rc.bottom) {
mousept.y -= 20;
countup = 0;
}
} else {
mousept.y -= 20;
if(mousept.y < 20) {
mousept.y += 20;
countup = 1;
}
}
SendMessage(hwnd, WM_MOUSEMOVE, 0,
MAKELONG(mousept.x, mousept.y));
#endif
#if ARCDEMO
startdegrees += 10;
if(startdegrees >= 360)
startdegrees = 0;
enddegrees += 15;
if(enddegrees >= 360)
enddegrees = 0;
InvalidateRect(hwnd, NULL, TRUE);
#endif
break;
case WM_DESTROY:
KillTimer(hwnd, 1);
break;
#endif /* TIMERDEMO*/
case WM_SIZE:
break;
case WM_MOVE:
break;
#if CLIENT3D
case WM_SETFOCUS:
PostMessage((HWND)wp, WM_PAINT, 0, 0L);
break;
case WM_KILLFOCUS:
PostMessage((HWND)wp, WM_PAINT, 0, 0L);
break;
case WM_ERASEBKGND:
if(GetFocus() != hwnd)
return DefWindowProc(hwnd, msg, wp, lp);
return 1;
#endif
#if GRAPH3D
case WM_ERASEBKGND:
if((GetWindowLong(hwnd, GWL_ID) & 03) == 1)
return 1;
return DefWindowProc(hwnd, msg, wp, lp);
#endif
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
#if CLIENT3D
if(GetFocus() == hwnd) {
GetClientRect(hwnd, &rc);
Draw3dShadow(hdc, rc.left, rc.top,
rc.right-rc.left, rc.bottom-rc.top,
GetSysColor(COLOR_3DDKSHADOW),
GetSysColor(COLOR_3DLIGHT));
InflateRect(&rc, -1, -1);
FillRect(hdc, &rc, GetStockObject(GRAY_BRUSH));
}
#endif
#if IMAGE
GetClientRect(hwnd, &rc);
DrawDIB(hdc, rc.left+2, rc.top+2, image2);
#endif
#if ARCDEMO
{
int x, y, w, h;
RECT rc;
if(hdc != NULL) {
GetWindowRect(hwnd, &rc);
rc.top += 13;
InflateRect(&rc, -3, -3);
/*Ellipse(hdc, 0, 0, rc.right-rc.left, rc.bottom-rc.top);*/
/*Arc(hdc, 0, 0, rc.right-rc.left, rc.bottom-rc.top, 0,0, 0,0);*/
/*Pie(hdc, 0, 0, rc.right-rc.left, rc.bottom-rc.top, 0,0, 0,0);*/
x = rc.left;
y = rc.top;
w = rc.right - rc.left;
h = rc.bottom - rc.top;
w += 10;
GdSetForeground(GdFindColor(RGB(0,255,0)));
GdArcAngle(hdc->psd, x+w/2, y+h/2, w/2, h/2, startdegrees*64,
enddegrees*64, MWPIE);
GdSetForeground(GdFindColor(RGB(0,0,0)));
GdArcAngle(hdc->psd, x+w/2, y+h/2, w/2, h/2, startdegrees*64,
enddegrees*64, MWARCOUTLINE);
/*GdSetForeground(GdFindColor(RGB(255,255,255)));*/
/*GdPoint(hdc->psd, x+w/2, y+h/2);*/
}
EndPaint(hwnd, &ps);
break;
}
#endif /* ARCDEMO*/
#if GRAPH3D
id = (int)GetWindowLong(hwnd, GWL_ID) & 03;
init3(hdc, id == 1? hwnd: NULL);
switch(id) {
case 0:
rose(1.0, 7, 13);
break;
case 1:
/*look3(0.5, 0.7, 1.5);*/
/*look3(0.2, -2 * gy, 1.0+gx);*/
look3(-2 * gx, -2 * gy, 1.2);
drawgrid(-8.0, 8.0, 10, -8.0, 8.0, 10);
break;
case 2:
setcolor3(BLACK);
circle3(1.0);
break;
case 3:
setcolor3(BLUE);
daisy(1.0, 20);
break;
}
#if CLIPDEMO
if(id == 1) {
HRGN hrgn, hrgn2;
/* create circular clip region for effect*/
GetClientRect(hwnd, &rc);
InflateRect(&rc, -80, -80);
switch((int)GetWindowLong(hwnd, GWL_ID)) {
default:
hrgn = CreateEllipticRgnIndirect(&rc);
break;
case 5:
hrgn = CreateRoundRectRgn(rc.left, rc.top,
rc.right, rc.bottom, 100, 100);
break;
case 1:
hrgn = CreateRectRgnIndirect(&rc);
break;
}
/* erase background, clip out blit area*/
GetClientRect(hwnd, &rc);
hrgn2 = CreateRectRgnIndirect(&rc);
SelectClipRgn(hdc, hrgn2);
ExtSelectClipRgn(hdc, hrgn, RGN_XOR);
DeleteObject(hrgn2);
GetClientRect(hwnd, &rc);
FillRect(hdc, &rc, GetStockObject(BLACK_BRUSH));
/* clip in only blit area*/
SelectClipRgn(hdc, hrgn);
DeleteObject(hrgn);
}
#endif /* CLIPDEMO*/
paint3(hdc);
#endif /* GRAPH3D*/
EndPaint(hwnd, &ps);
break;
case WM_LBUTTONDOWN:
break;
case WM_MOUSEMOVE:
#if GRAPH3D
if((GetWindowLong(hwnd, GWL_ID) & 03) == 1) {
POINT pt;
POINTSTOPOINT(pt, lp);
GetClientRect(hwnd, &rc);
gx = (vec1)pt.x / rc.right;
gy = (vec1)pt.y / rc.bottom;
InvalidateRect(hwnd, NULL, FALSE);
mousept.x = pt.x;
mousept.y = pt.y;
}
#endif
break;
case WM_LBUTTONUP:
break;
case WM_RBUTTONDOWN:
break;
default:
return DefWindowProc( hwnd, msg, wp, lp);
}
return( 0);
}
/*
* This procedure implements the messages passed by the window
* manager for default processing on behalf of the window.
*/
LRESULT WINAPI
DefWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
RECT rc;
DWORD dwStyle;
HBRUSH hbr;
HPEN hpen, holdpen;
PAINTSTRUCT ps;
POINT curpt;
int x, y;
HWND wp;
HWND oldActive;
COLORREF crCaption;
LPNCCALCSIZE_PARAMS lpnc;
CHAR szTitle[64];
static POINT startpt;
switch(msg) {
case WM_NCCALCSIZE:
/* calculate client rect from passed window rect in rgrc[0]*/
lpnc = (LPNCCALCSIZE_PARAMS)lParam;
dwStyle = GetWindowLong(hwnd, GWL_STYLE);
if(dwStyle & WS_BORDER) {
if((dwStyle & WS_CAPTION) == WS_CAPTION) {
InflateRect(&lpnc->rgrc[0],
-mwSYSMETRICS_CXFRAME,
-mwSYSMETRICS_CYFRAME);
lpnc->rgrc[0].top += mwSYSMETRICS_CYCAPTION + 1;
} else
InflateRect(&lpnc->rgrc[0], -1, -1);
}
break;
case WM_NCPAINT:
/* repaint all non-client area*/
dwStyle = GetWindowLong(hwnd, GWL_STYLE);
if(dwStyle & WS_BORDER) {
hdc = GetWindowDC(hwnd);
GetWindowRect(hwnd, &rc);
if((dwStyle & WS_CAPTION) == WS_CAPTION) {
/* draw 2-line 3d border around window*/
Draw3dOutset(hdc, rc.left, rc.top,
rc.right-rc.left, rc.bottom-rc.top);
InflateRect(&rc, -2, -2);
/* draw 1-line inset inside border*/
hpen = CreatePen(PS_SOLID, 1,
GetSysColor(COLOR_BTNFACE));
holdpen = SelectObject(hdc, hpen);
SelectObject(hdc, GetStockObject(NULL_BRUSH));
Rectangle(hdc, rc.left, rc.top, rc.right,
rc.bottom);
InflateRect(&rc, -1, -1);
/* fill caption*/
rc.bottom = rc.top + mwSYSMETRICS_CYCAPTION;
crCaption = GetActiveWindow()==hwnd?
GetSysColor(COLOR_ACTIVECAPTION):
GetSysColor(COLOR_INACTIVECAPTION);
hbr = CreateSolidBrush(crCaption);
FillRect(hdc, &rc, hbr);
DeleteObject(hbr);
/* draw 1 line under caption*/
MoveToEx(hdc, rc.left, rc.bottom, NULL);
LineTo(hdc, rc.right, rc.bottom);
DeleteObject(SelectObject(hdc, holdpen));
/* draw caption text*/
if(GetWindowText(hwnd, szTitle,
sizeof(szTitle))) {
SetBkMode(hdc, TRANSPARENT);
/* set background color even though
* transparent in case GdArea is used
* to draw text which compares
* gr_foreground != gr_background
* when transparent...
*/
SetBkColor(hdc, crCaption);
SetTextColor(hdc,
GetActiveWindow()==hwnd?
GetSysColor(COLOR_CAPTIONTEXT):
GetSysColor(COLOR_INACTIVECAPTIONTEXT));
SelectObject(hdc,
GetStockObject(DEFAULT_GUI_FONT));
GetWindowRect(hwnd, &rc);
TextOut(hdc, rc.left+4, rc.top+2,
szTitle, strlen(szTitle));
}
/* draw close box*/
GetCloseBoxRect(hwnd, &rc);
/*DrawDIB(hdc, rc.right-XSIZE_CLOSEBOX-3,
rc.top+3, &image_close4);*/
Draw3dBox(hdc, rc.left, rc.top,
rc.right-rc.left, rc.bottom-rc.top,
GetSysColor(COLOR_BTNHIGHLIGHT),
GetSysColor(COLOR_WINDOWFRAME));
InflateRect(&rc, -1, -1);
hbr = CreateSolidBrush(
GetSysColor(COLOR_BTNFACE));
FillRect(hdc, &rc, hbr);
DeleteObject(hbr);
InflateRect(&rc, -1, -1);
MoveToEx(hdc, rc.left, rc.top, NULL);
LineTo(hdc, rc.right-1, rc.bottom-1);
MoveToEx(hdc, rc.left, rc.bottom-1, NULL);
LineTo(hdc, rc.right-1, rc.top);
} else {
SelectObject(hdc, GetStockObject(NULL_BRUSH));
Rectangle(hdc, rc.left, rc.top, rc.right,
rc.bottom);
}
ReleaseDC(hwnd, hdc);
}
break;
case WM_NCHITTEST:
/* if system is dragging a window, always return caption*/
if(dragwp)
return HTCAPTION;
/* Determine what part of the window the mouse is over*/
POINTSTOPOINT(curpt, lParam);
if(PtInRect(&hwnd->clirect, curpt))
return HTCLIENT;
if(PtInRect(&hwnd->vscroll.rc, curpt))
return HTVSCROLL;
if(PtInRect(&hwnd->hscroll.rc, curpt))
return HTHSCROLL;
dwStyle = GetWindowLong(hwnd, GWL_STYLE);
if((dwStyle & WS_CAPTION) == WS_CAPTION) {
GetCloseBoxRect(hwnd, &rc);
if(PtInRect(&rc, curpt))
return HTCLOSE;
GetWindowRect(hwnd, &rc);
InflateRect(&rc, -2, -2);
rc.bottom = rc.top + mwSYSMETRICS_CYCAPTION;
if(PtInRect(&rc, curpt))
return HTCAPTION;
GetWindowRect(hwnd, &rc);
InflateRect(&rc, -2, -2);
rc.top += mwSYSMETRICS_CYCAPTION;
if(PtInRect(&rc, curpt))
return HTCLIENT;
return HTBORDER;
}
return HTNOWHERE;
case WM_NCLBUTTONDOWN:
/* Handle default actions for mouse down on window*/
if(wParam == HTCLOSE) {
SendMessage(hwnd, WM_CLOSE, 0, 0L);
break;
}
/* set focus on mouse down, repaint if necessary*/
oldActive = GetActiveWindow();
if(wParam == HTCLIENT || wParam == HTVSCROLL ||
wParam == HTHSCROLL)
/* activate and raise window if in client area*/
/* kaffe port requires this commented out*/
SetForegroundWindow(hwnd);
else {
/* otherwise just change focus window, same z order*/
/* this will activate it's top level parent*/
SetFocus(hwnd);
}
/* repaint captions now because of activation change*/
UpdateWindow(oldActive);
UpdateWindow(hwnd);
if(wParam == HTVSCROLL || wParam == HTHSCROLL) {
MwHandleNCMessageScrollbar(hwnd, msg, wParam, lParam);
break;
}
/* start window drag if in caption area*/
if(wParam == HTCAPTION && hwnd != rootwp) {
POINTSTOPOINT(startpt, lParam);
if(!(GetWindowLong(hwnd, GWL_STYLE) & WS_MAXIMIZE))
dragwp = hwnd;
SetRectEmpty(&lastrc); /* XORMOVE only*/
}
break;
case WM_NCMOUSEMOVE:
if(wParam == HTVSCROLL || wParam == HTHSCROLL) {
MwHandleNCMessageScrollbar(hwnd, msg, wParam, lParam);
break;
}
/* drag window with mousemove after mousedown*/
if(dragwp == hwnd) {
POINTSTOPOINT(curpt, lParam);
x = curpt.x - startpt.x;
y = curpt.y - startpt.y;
if(mwERASEMOVE) {
GetWindowRect(hwnd, &rc);
MoveWindow(hwnd, rc.left+x, rc.top+y,
rc.right-rc.left, rc.bottom-rc.top,
TRUE);
startpt = curpt;
} else
DrawXORFrame(hwnd, x, y, TRUE);
}
break;
case WM_NCLBUTTONUP:
/* stop window drag*/
if(dragwp == hwnd) {
dragwp = NULL;
if(mwERASEMOVE) {
/*
* User stopped moving window, repaint
* windows previously queued for painting.
*/
for(wp=listwp; wp; wp=wp->next)
if(wp->gotPaintMsg == PAINT_DELAYPAINT)
wp->gotPaintMsg = PAINT_NEEDSPAINT;
} else {
POINTSTOPOINT(curpt, lParam);
x = curpt.x - startpt.x;
y = curpt.y - startpt.y;
DrawXORFrame(hwnd, x, y, FALSE);
GetWindowRect(hwnd, &rc);
MoveWindow(hwnd, rc.left+x, rc.top+y,
rc.right-rc.left, rc.bottom-rc.top, TRUE);
}
}
if(wParam == HTVSCROLL || wParam == HTHSCROLL) {
MwHandleNCMessageScrollbar(hwnd, msg, wParam, lParam);
break;
}
break;
case WM_NCLBUTTONDBLCLK:
if(wParam == HTVSCROLL || wParam == HTHSCROLL) {
MwHandleNCMessageScrollbar(hwnd, msg, wParam, lParam);
break;
}
/* maximize/restore processing*/
if(wParam != HTCAPTION)
break;
if((hwnd->style & WS_CAPTION) == WS_CAPTION) {
if(hwnd->style & WS_MAXIMIZE) {
rc = hwnd->restorerc;
MoveWindow(hwnd, rc.left, rc.top,
rc.right-rc.left, rc.bottom-rc.top,
TRUE);
hwnd->style &= ~WS_MAXIMIZE;
} else {
hwnd->restorerc = hwnd->winrect;
GetWindowRect(rootwp, &rc);
MoveWindow(hwnd, -mwSYSMETRICS_CXFRAME,
-mwSYSMETRICS_CYFRAME,
rc.right+2*mwSYSMETRICS_CXFRAME,
rc.bottom+2*mwSYSMETRICS_CYFRAME, TRUE);
hwnd->style |= WS_MAXIMIZE;
}
}
break;
case WM_GETTEXTLENGTH:
/* Get window text length. This routine requires
* knowledge of the internal window structure
*/
return strlen(hwnd->szTitle);
case WM_GETTEXT:
/* Get window text. This routine requires
* knowledge of the internal window structure
*/
return strzcpy((LPSTR)lParam, hwnd->szTitle, wParam);
case WM_SETTEXT:
/* Set window text. This routine requires
* knowledge of the internal window structure.
* Note that setting text doesn't invalidate the window.
*/
strzcpy(hwnd->szTitle, (LPSTR)lParam, sizeof(hwnd->szTitle));
return TRUE;
case WM_CLOSE:
DestroyWindow(hwnd);
if(hwnd == rootwp)
PostQuitMessage(0);
break;
case WM_ERASEBKGND:
/* erase background with class background brush*/
hbr = (HBRUSH)GetClassLong(hwnd, GCL_HBRBACKGROUND);
if(!hbr)
return 0;
/* don't exclude update region*/
hdc = GetDCEx(hwnd, NULL, DCX_DEFAULTCLIP);
FillRect(hdc, NULL, hbr);
ReleaseDC(hwnd, hdc);
return 1;
case WM_PAINT:
/* required to send erasebkgnd for desktop window*/
hdc = BeginPaint(hwnd, &ps);
/* draw desktop wallpaper*/
if(hwnd == rootwp && pImageWallpaper) {
GetWindowRect(hwnd, &rc);
DrawDIB(hdc,
(rc.right-rc.left-pImageWallpaper->width)/2,
(rc.bottom-rc.top-pImageWallpaper->height)/2,
pImageWallpaper);
}
EndPaint(hwnd, &ps);
break;
}
return 0;
}
