From f2a9cb0d6ae940425d0d377469a171876e11fbaa Mon Sep 17 00:00:00 2001
From: Jonathan Marler <johnnymarler@gmail.com>
Date: Sun, 5 Jan 2025 14:04:41 -0700
Subject: [PATCH] win32 gui: performance fix, don't call DrawText for space
 characters

---
 src/win32/gui.zig | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/win32/gui.zig b/src/win32/gui.zig
index 16db477..ae81fe3 100644
--- a/src/win32/gui.zig
+++ b/src/win32/gui.zig
@@ -279,9 +279,12 @@ fn paint(
             const grapheme_len = std.unicode.wtf8ToWtf16Le(&buf_wtf16, cell.char.grapheme) catch |err| switch (err) {
                 error.InvalidWtf8 => @panic("TODO: handle invalid wtf8"),
             };
+            const grapheme = buf_wtf16[0..grapheme_len];
+            if (std.mem.eql(u16, grapheme, &[_]u16{' '}))
+                continue;
             ddui.DrawText(
                 &d2d.target.ID2D1RenderTarget,
-                buf_wtf16[0..grapheme_len],
+                grapheme,
                 text_format_editor,
                 ddui.rectFloatFromInt(cell_rect),
                 d2d.solid(d2dColorFromVAxis(cell.style.fg)),