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Completely eliminate flickering by implementing double buffering.

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svn path=/trunk/; revision=25213
This commit is contained in:
Maarten Bosma 2006-12-23 18:28:38 +00:00
parent 3b7c2562ce
commit d7eb6d1ba4
1 changed files with 13 additions and 5 deletions
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18
reactos/base/applications/downloader/main.c
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@ -222,9 +222,17 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwnd, &ps);
FillRect(hdc, &ps.rcPaint, CreateSolidBrush(RGB(235,233,237)));
DrawBitmap(hdc, 10, 12, hLogo);
DrawDescription(hdc, DescriptionRect);
HDC BackbufferHdc = CreateCompatibleDC(hdc);
HBITMAP BackbufferBmp = CreateCompatibleBitmap(hdc, ps.rcPaint.right, ps.rcPaint.bottom);
SelectObject(BackbufferHdc, BackbufferBmp);
FillRect(BackbufferHdc, &ps.rcPaint, CreateSolidBrush(RGB(235,235,235)));
DrawBitmap(BackbufferHdc, 10, 12, hLogo);
DrawDescription(BackbufferHdc, DescriptionRect);
BitBlt(hdc, 0, 0, ps.rcPaint.right, ps.rcPaint.bottom, BackbufferHdc, 0, 0, SRCCOPY);
DeleteObject(BackbufferBmp);
DeleteDC(BackbufferHdc);
EndPaint(hwnd, &ps);
}
break;
@ -299,8 +307,8 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
RECT Top = {0,0,LOWORD(lParam),60};
InvalidateRect(hwnd, &Top, TRUE);
RECT Description = {Split_Vertical, Split_Hozizontal, LOWORD(lParam), HIWORD(lParam)};
InvalidateRect(hwnd, &Description, TRUE);
RECT Bottom = {Split_Vertical, Split_Hozizontal, LOWORD(lParam), HIWORD(lParam)};
InvalidateRect(hwnd, &Bottom, FALSE);
}
break;