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win32 gui: fix high cpu usage, validate window in WM_PAINT

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Looks like I probably accidently removed the calls to BeginPaint and
EndPaint in WM_PAINT, which, would cause the OS to think that the
window contents are never validated and will continuously send us WM_PAINT
messages.  I've added these back in and now flow is back to low CPU usage
especially when idle.
This commit is contained in:
Jonathan Marler 2025-01-20 06:03:34 -07:00 • committed by CJ van den Berg
parent 386094001d
commit 620e44ef02
1 changed files with 4 additions and 0 deletions
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4
src/win32/gui.zig
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@ -1040,6 +1040,10 @@ fn WndProc(
const font = getFont(dpi, getFontSize(), getFontFace()); const font = getFont(dpi, getFontSize(), getFontFace());
const client_size = getClientSize(u32, hwnd); const client_size = getClientSize(u32, hwnd);
var ps: win32.PAINTSTRUCT = undefined;
_ = win32.BeginPaint(hwnd, &ps) orelse return fatalWin32("BeginPaint", win32.GetLastError());
defer if (0 == win32.EndPaint(hwnd, &ps)) fatalWin32("EndPaint", win32.GetLastError());
global.render_cells.resize( global.render_cells.resize(
global.render_cells_arena.allocator(), global.render_cells_arena.allocator(),
global.screen.buf.len, global.screen.buf.len,