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SDL_windowsevents: minimize white screen flash on window creation 

Clear the window to black on the initial window draw, to avoid a really
obnoxious white flash. This doesn't always eliminate it, but it
definitely minimizes it.
This commit is contained in:
Steven Noonan 2022-08-25 20:18:03 -07:00 committed by Sam Lantinga
parent b6e7c743db
commit 053b5f85f1
2 changed files with 9 additions and 0 deletions
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8
src/video/windows/SDL_windowsevents.c
View File

@ -1271,7 +1271,15 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
/* We'll do our own drawing, prevent flicker */
case WM_ERASEBKGND:
if (!data->videodata->cleared)
{
RECT client_rect;
HBRUSH brush;
data->videodata->cleared = SDL_TRUE;
GetClientRect(hwnd, &client_rect);
brush = CreateSolidBrush(0);
FillRect(GetDC(hwnd), &client_rect, brush);
DeleteObject(brush);
}
return (1);

1
src/video/windows/SDL_windowsvideo.h
View File

@ -394,6 +394,7 @@ typedef struct SDL_VideoData
#endif /*!defined(__XBOXONE__) && !defined(__XBOXSERIES__)*/
SDL_bool dpi_scaling_enabled;
SDL_bool cleared;
#ifndef SDL_DISABLE_WINDOWS_IME
SDL_bool ime_com_initialized;