C++ GdiFlush函數代碼示例

static void PaintWindowThread(void *)
{
	/* First tell the main thread we're started */
	_draw_mutex->BeginCritical();
	SetEvent(_draw_thread_initialized);

	/* Now wait for the first thing to draw! */
	_draw_mutex->WaitForSignal();

	while (_draw_continue) {
		/* Convert update region from logical to device coordinates. */
		POINT pt = {0, 0};
		ClientToScreen(_wnd.main_wnd, &pt);
		OffsetRect(&_wnd.update_rect, pt.x, pt.y);

		/* Create a device context that is clipped to the region we need to draw.
		 * GetDCEx 'consumes' the update region, so we may not destroy it ourself. */
		HRGN rgn = CreateRectRgnIndirect(&_wnd.update_rect);
		HDC dc = GetDCEx(_wnd.main_wnd, rgn, DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | DCX_INTERSECTRGN);

		PaintWindow(dc);

		/* Clear update rect. */
		SetRectEmpty(&_wnd.update_rect);
		ReleaseDC(_wnd.main_wnd, dc);

		/* Flush GDI buffer to ensure drawing here doesn't conflict with any GDI usage in the main WndProc. */
		GdiFlush();

		_draw_mutex->WaitForSignal();
	}

	_draw_mutex->EndCritical();
	_draw_thread->Exit();
}

/*
 * InterfaceDrawElements:  Draw spiffy interface elements.
 */
void InterfaceDrawElements(HDC hdc)
{
  int i, x, y;
  InterfaceElement *e;
  Bool vertical;

  for (i=0; i < NUM_AUTO_ELEMENTS; i++)
  {
	  //	Temp. disable xxx
/*	  if( i >= ELEMENT_ULTOP && i <= ELEMENT_LRRIGHT )
		  continue;
	  if( i >= ELEMENT_IULTOP && i <= ELEMENT_ILRRIGHT )
		  continue;
	  if( i == ELEMENT_BLLBOTTOM || i == ELEMENT_BLRBOTTOM )
		  continue;*/

    OffscreenWindowBackground(NULL, elements[i].x, elements[i].y, elements[i].width, elements[i].height);
    
    OffscreenBitBlt(hdc, elements[i].x, elements[i].y, elements[i].width, elements[i].height,
		    elements[i].bits, 0, 0, DIBWIDTH(elements[i].width), 
		    OBB_COPY | OBB_FLIP | OBB_TRANSPARENT);
    GdiFlush();
  }

  for (i=0; i < NUM_AUTO_REPEATERS; i++)
  {
	  //	Temp. disable xxx
	if( i >= ELEMENT_ITOP && i <= ELEMENT_IRIGHT )
		continue;
	  //	disable xxx
	if( i >= ELEMENT_TOP && i <= ELEMENT_RIGHT )
		continue;
	if( i == ELEMENT_BBOTTOM )
		continue;

	e = &repeaters[i].element;
    x = e->x;
    y = e->y;
    vertical = repeaters[i].vertical;
        
    while (1)
    {
      if ((vertical && y > repeaters[i].end) || (!vertical && x > repeaters[i].end))
	break;
      
      OffscreenWindowBackground(NULL, x, y, e->width, e->height);
      OffscreenBitBlt(hdc, x, y, e->width, e->height, e->bits, 0, 0, DIBWIDTH(e->width), 
		      OBB_COPY | OBB_FLIP | OBB_TRANSPARENT);
      if (vertical)
	y += e->height;
      else x += e->width;

      GdiFlush();
    }
  }
}

FREObject __cdecl AmbireCaptureCapture(FREContext ctx, void * functionData, uint32_t argc, FREObject argv[]) {
	bool success = false;
	POINT pt = { 0 };
	FREBitmapData bd = { 0 };
	FREResult result = FREAcquireBitmapData(argv[0], &bd);
	if(result == FRE_OK) {
		int width = bd.width;
		int height = bd.height;
		BITMAPINFOHEADER bmi = { 0 };
		bmi.biSize = sizeof(bmi);
		bmi.biWidth = width;
		bmi.biHeight = height;
		bmi.biPlanes = 1;
		bmi.biBitCount = 24;
		int stride = ((width * 3 + 3) / 4) * 4;
		bmi.biSizeImage = stride * height;
		void * ppvBits = 0;
		HDC hdcDesktop = GetDC(0);
		if(hdcDesktop) {
			HDC hdcMem = CreateCompatibleDC(hdcDesktop);
			if(hdcMem) {
				HBITMAP hbm = CreateDIBSection(hdcMem, (const BITMAPINFO *)&bmi, 0, &ppvBits, 0, 0);
				if(hbm) {
					SelectObject(hdcMem, hbm);
					BitBlt(hdcMem, 0, 0, width, height, hdcDesktop, 0, 0, SRCCOPY);
					GdiFlush();
					ReleaseDC(0, hdcDesktop);
					DeleteDC(hdcMem);
					GdiFlush();
					for(int y = 0; y < height; ++y) {
						const unsigned char * p = reinterpret_cast<unsigned char *>(ppvBits) + y * stride;
						uint32_t * q = reinterpret_cast<uint32_t *>(bd.bits32) + y * bd.lineStride32;
						for(int x = 0; x < width; ++x, p += 3, ++q) {
							*q = 0xFF000000 | (p[2] << 16) | (p[1] << 8) | p[0];
						}
					}
					success = true;
					DeleteObject(hbm);
				} else {
					DeleteDC(hdcMem);
				}
			} else {
				ReleaseDC(0, hdcDesktop);
			}
		}
		FREReleaseBitmapData(argv[0]);
	}
	FREObject rv = 0;
	FRENewObjectFromBool(success ? 1 : 0, &rv);
	return rv;
}

      // Draw text to full-screen sized bitmap, cleared to <bgcolor>
      // Draw boxes for each word on EyeLink tracker display if <dotrack> set
      // Use font selected with get_new_font(), and draws it in <fgcolor>
      // RECT <margins> sets margins, and <lspace> sets pixels between lines
HBITMAP text_bitmap(char *txt, COLORREF fgcolor, COLORREF bgcolor, 
                               RECT margins, int lspace, int dotrack)
{
  HDC hdc;
  HBITMAP hbm;
  HDC mdc;
  HBRUSH oBrush;
  HBITMAP obm;

  hdc = GetDC(NULL);                 
  mdc = CreateCompatibleDC(hdc);     // create display-compatible memory context
  hbm = CreateCompatibleBitmap(hdc, SCRWIDTH, SCRHEIGHT);
  obm = SelectObject(mdc, hbm);      // create DDB bitmap, select into context
                                     
  oBrush = SelectObject(mdc, CreateSolidBrush(bgcolor | 0x02000000L));  // brush to fill with 
  PatBlt(mdc, 0, 0, SCRWIDTH, SCRHEIGHT, PATCOPY);                      // CLEAR BITMAP
  DeleteObject(SelectObject(mdc, oBrush));

  draw_text_box(mdc, txt, fgcolor, margins, lspace, dotrack);  // DRAW THE TEXT

  GdiFlush();     // ADDED for Wimdows 2000/XP: Forces drawing to be immediate      

  SelectBitmap(mdc, obm);     // Release the GDI resources
  DeleteDC(mdc);
  ReleaseDC(NULL, hdc);
  return hbm;                 // Return the new bitmap
}

bool Bitmap::create(int widthPixels, int heightPixels)
{
    destroy();

    width = widthPixels;
    height = heightPixels;
    pitch = ((width * 32 + 31) & ~31) >> 3;
    dc = CreateCompatibleDC(0);

    if (!dc)
        return false;

    memset(&info, 0, sizeof(info));

    info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    info.bmiHeader.biBitCount = 32;
    info.bmiHeader.biWidth = width;
    info.bmiHeader.biHeight = -height;
    info.bmiHeader.biCompression = BI_RGB;
    info.bmiHeader.biPlanes = 1;

    hBitmap = CreateDIBSection(dc, &info, DIB_RGB_COLORS,
                               reinterpret_cast<void**>(&m_pBits), 0, 0);

    if (!hBitmap)
    {
        destroy();
        return false;
    }

    GdiFlush();
    return true;
}

HBITMAP wf_create_dib(wfInfo* wfi, int width, int height, int bpp, uint8* data)
{
	HDC hdc;
	int negHeight;
	HBITMAP bitmap;
	BITMAPINFO bmi;
	uint8* cdata = NULL;

	/**
	 * See: http://msdn.microsoft.com/en-us/library/dd183376
	 * if biHeight is positive, the bitmap is bottom-up
	 * if biHeight is negative, the bitmap is top-down
	 * Since we get top-down bitmaps, let's keep it that way
	 */

	negHeight = (height < 0) ? height : height * (-1);

	hdc = GetDC(NULL);
	bmi.bmiHeader.biSize = sizeof(BITMAPINFO);
	bmi.bmiHeader.biWidth = width;
	bmi.bmiHeader.biHeight = negHeight;
	bmi.bmiHeader.biPlanes = 1;
	bmi.bmiHeader.biBitCount = 24;
	bmi.bmiHeader.biCompression = BI_RGB;
	bitmap = CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, (void**) &cdata, NULL, 0);

	if (data != NULL)
		freerdp_image_convert(data, cdata, width, height, bpp, 24, wfi->clrconv);

	ReleaseDC(NULL, hdc);
	GdiFlush();

	return bitmap;
}

void    plTextGenerator::FlushToHost( void )
{
#if HS_BUILD_FOR_WIN32
    // Flush the GDI first, to make sure it's done
    GdiFlush();

    // Now copy our alpha channel over. I hate the GDI
    uint32_t      i = fHost->fWidth * fHost->fHeight;
    uint32_t      *dest = fWinRGBBits;
    uint8_t       *src = fWinAlphaBits;

/*  while( i-- )
    {
        *dest &= 0x00ffffff;
        *dest |= ( *src ) << 24;
//      *dest |= ( *dest << 16 ) & 0xff000000;
        dest++;
        src++;
    }
*/
    do
    {
        i--;
        dest[ i ] &= 0x00ffffff;
        dest[ i ] |= src[ i ] << 24;
    } while( i );
#endif

    // Dirty the mipmap's deviceRef, if there is one
    if( fHost->GetDeviceRef() != nil )
        fHost->GetDeviceRef()->SetDirty( true );
}

static void AeroPaintControl(HWND hwnd, HDC hdc, WNDPROC OldWndProc, UINT msg = WM_PRINT, LPARAM lpFlags = PRF_CLIENT | PRF_NONCLIENT)
{
	HBITMAP hBmp, hOldBmp;
	RECT rc; GetClientRect(hwnd, &rc);
	BYTE *pBits;

	HDC tempDC = CreateCompatibleDC(hdc);

	BITMAPINFO bmi;
	bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	bmi.bmiHeader.biWidth = rc.right;
	bmi.bmiHeader.biHeight = -rc.bottom;
	bmi.bmiHeader.biPlanes = 1;
	bmi.bmiHeader.biBitCount = 32;
	bmi.bmiHeader.biCompression = BI_RGB;
	hBmp = CreateDIBSection(tempDC, &bmi, DIB_RGB_COLORS, (void **)&pBits, NULL, 0);

	hOldBmp = (HBITMAP)SelectObject(tempDC, hBmp);

	//paint
	SetPropA(hwnd, "Miranda.AeroRender.Active", (HANDLE)TRUE);
	mir_callNextSubclass(hwnd, OldWndProc, msg, (WPARAM)tempDC, lpFlags);
	SetPropA(hwnd, "Miranda.AeroRender.Active", (HANDLE)FALSE);

	// Fix alpha channel
	GdiFlush();
	for (int i = 0; i < rc.right*rc.bottom; i++, pBits += 4)
	if (!pBits[3]) pBits[3] = 255;

	//Copy to output
	BitBlt(hdc, 0, 0, rc.right, rc.bottom, tempDC, 0, 0, SRCCOPY);
	SelectObject(tempDC, hOldBmp);
	DeleteObject(hBmp);
	DeleteDC(tempDC);
}

void
__glutFinishMenu(Window win, int x, int y)
{

  unmapMenu(__glutMappedMenu);

  /* XXX Put in a GdiFlush just in case.  Probably unnecessary. -mjk  */
  GdiFlush();

  if (__glutMenuStatusFunc) {
    __glutSetWindow(__glutMenuWindow);
    __glutSetMenu(__glutMappedMenu);

    /* Setting __glutMappedMenu to NULL permits operations that
       change menus or destroy the menu window again. */
    __glutMappedMenu = NULL;

    __glutMenuStatusFunc(GLUT_MENU_NOT_IN_USE, x, y);
  }
  /* Setting __glutMappedMenu to NULL permits operations that
     change menus or destroy the menu window again. */
  __glutMappedMenu = NULL;

  /* If an item is selected and it is not a submenu trigger,
     generate menu callback. */
  if (__glutItemSelected && !__glutItemSelected->isTrigger) {
    __glutSetWindow(__glutMenuWindow);
    /* When menu callback is triggered, current menu should be
       set to the callback menu. */
    __glutSetMenu(__glutItemSelected->menu);
    __glutItemSelected->menu->select(__glutItemSelected->value);
  }
  __glutMenuWindow = NULL;
}

static void
gdk_win32_display_sync (GdkDisplay * display)
{
  g_return_if_fail (display == _gdk_display);

  GdiFlush ();
}

HBITMAP g_CreateHbitmapFromGdiplusBitmapData32bpp(const Gdiplus::BitmapData & pBitmapData)
{
	pfc::array_t<t_uint8> bm_data;
	bm_data.set_size(sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 0);
	bm_data.fill(0);

	BITMAPINFOHEADER bmi;
	memset(&bmi, 0, sizeof(bmi));

	bmi.biSize = sizeof(bmi);
	bmi.biWidth = pBitmapData.Width;
	bmi.biHeight = -pBitmapData.Height;
	bmi.biPlanes = 1;
	bmi.biBitCount = 32;
	bmi.biCompression = BI_RGB;
	bmi.biClrUsed = 0;
	bmi.biClrImportant = 0;

	BITMAPINFO & bi = *(BITMAPINFO*)bm_data.get_ptr();

	bi.bmiHeader = bmi;

	void * data = 0;
	HBITMAP bm = CreateDIBSection(0, &bi, DIB_RGB_COLORS, &data, 0, 0);

	if (data)
	{
		char * ptr = (char*)data;

		GdiFlush();

		memcpy(ptr, pBitmapData.Scan0, pBitmapData.Stride*pBitmapData.Height);
	}
	return bm;
}

static int
GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                const SDL_Rect * rect, int markDirty, void **pixels,
                int *pitch)
{
    GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;

    if (data->yuv) {
        return SDL_SW_LockYUVTexture(data->yuv, rect, markDirty, pixels,
                                     pitch);
    } else if (data->pixels) {
#ifndef _WIN32_WCE
        /* WinCE has no GdiFlush */
        GdiFlush();
#endif
        *pixels =
            (void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
                      rect->x * SDL_BYTESPERPIXEL(texture->format));
        *pitch = data->pitch;
        return 0;
    } else {
        SDL_SetError("No pixels available");
        return -1;
    }
}

// returns TRUE if there is a problem such as ERROR_IO_PENDING.
static bool icvGetBitmapData( CvWindow* window, SIZE* size, int* channels, void** data )
{
    BITMAP bmp;
    GdiFlush();
    HGDIOBJ h = GetCurrentObject( window->dc, OBJ_BITMAP );
    if( size )
        size->cx = size->cy = 0;
    if( data )
        *data = 0;

    if (h == NULL)
        return true;
    if (GetObject(h, sizeof(bmp), &bmp) == 0)
        return true;

    if( size )
    {
        size->cx = abs(bmp.bmWidth);
        size->cy = abs(bmp.bmHeight);
    }

    if( channels )
        *channels = bmp.bmBitsPixel/8;

    if( data )
        *data = bmp.bmBits;

    return false;
}

void SaveAlpha(LPRECT lpRect)
{
    if (skin.colSavedBits) {
        mir_free(skin.colSavedBits);
        skin.colSavedBits = 0;
    }
    GdiFlush();

    if (lpRect->left < 0) lpRect->left = 0;
    if (lpRect->top < 0) lpRect->top = 0;
    if (lpRect->right - lpRect->left > skin.iWidth) lpRect->right = lpRect->left + skin.iWidth;
    if (lpRect->bottom - lpRect->top > skin.iHeight) lpRect->bottom = lpRect->top + skin.iHeight;

    int x = lpRect->left;
    int y = lpRect->top;
    int w = lpRect->right - lpRect->left;
    int h = lpRect->bottom - lpRect->top;

    skin.colSavedBits = (COLOR32 *)mir_alloc(sizeof(COLOR32) * w * h);
    COLOR32 *p1 = skin.colSavedBits;

    for (int i = 0; i < h; i++) {
        if (i+y < 0) continue;
        if (i+y >= skin.iHeight) break;
        COLOR32 *p2 = skin.colBits + (y+i)*skin.iWidth + x;
        for (int j = 0; j < w; j++) {
            if (j+x < 0) continue;
            if (j+x >= skin.iWidth) break;
            *p1++ = *p2++;
        }
    }
}

void IupGLWait(int gl)
{
  if (gl)
    glFinish();
  else
    GdiFlush();
}