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Black cockpit canvas + flicker-free pane painting

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SS_BLACKRECT paints the system window-frame color - gray on modern
Windows - so the viewscreen child is now a plain STATIC subclassed to
erase true black. The MFD/map panes flickered because Paint() cleared
the on-screen surface before redrawing at the fill cadence; the pane
now composes off screen and lands in a single BitBlt.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Cyd
2026-07-12 15:41:49 -05:00
co-authored by Claude Fable 5
parent 293e369656
commit 2a6398702c
2 changed files with 48 additions and 6 deletions
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MUNGA_L4/L4VB16.cpp
+27 -1
View File
@@ -3801,6 +3801,26 @@ void
//########################################################################
//############################ SVGA640x480x16 ############################
//########################################################################
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Single-window cockpit: the viewscreen child erases true black
// (SS_BLACKRECT paints the system window-frame gray on modern Windows).
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
static WNDPROC gViewscreenBaseProc = NULL;
static LRESULT CALLBACK
ViewscreenBlackProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
if (message == WM_ERASEBKGND)
{
RECT client;
GetClientRect(hwnd, &client);
FillRect((HDC) wParam, &client, (HBRUSH) GetStockObject(BLACK_BRUSH));
return 1;
}
return CallWindowProcA(gViewscreenBaseProc, hwnd, message, wParam, lParam);
}
SVGA16::SVGA16(
int mode,
int init_width,
@@ -3916,14 +3936,20 @@ SVGA16::SVGA16(
if (cockpit != NULL)
{
// plain STATIC (SS_BLACKRECT actually paints the system
// window-frame GRAY on modern Windows), subclassed below to
// erase true black
cockpitViewscreen = CreateWindowExA(
0, "STATIC", "",
WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | SS_BLACKRECT,
WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS,
0, 0,
view_w, view_h,
cockpit, NULL, GetModuleHandleA(NULL), NULL);
if (cockpitViewscreen != NULL)
{
gViewscreenBaseProc = (WNDPROC) SetWindowLongPtrA(
cockpitViewscreen, GWLP_WNDPROC,
(LONG_PTR) ViewscreenBlackProc);
gMainPresentWindow = cockpitViewscreen;
}
}