From 19141bcbddc9b11060e95117fcb33b0a91377e40 Mon Sep 17 00:00:00 2001
From: Shane Smiskol <shane@smiskol.com>
Date: Fri, 10 Oct 2025 22:36:13 -0700
Subject: [PATCH] pt 2

---
 selfdrive/ui/widgets/offroad_alerts.py |  8 ++++----
 system/ui/lib/application.py           | 15 +++++++++++++++
 system/ui/lib/text_measure.py          |  3 ++-
 3 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/selfdrive/ui/widgets/offroad_alerts.py b/selfdrive/ui/widgets/offroad_alerts.py
index 49edafa0f1..4fe70378ea 100644
--- a/selfdrive/ui/widgets/offroad_alerts.py
+++ b/selfdrive/ui/widgets/offroad_alerts.py
@@ -65,8 +65,8 @@ class ActionButton(Widget):
 
   def set_text(self, text: str):
     self._text = text
-    self._text_width = measure_text_cached(gui_app.font(FontWeight.MEDIUM), self._text, AlertConstants.FONT_SIZE).x
-    self._rect.width = max(self._text_width + 60 * 2, self._min_width)
+    self._text_size = measure_text_cached(gui_app.font(FontWeight.MEDIUM), self._text, AlertConstants.FONT_SIZE)
+    self._rect.width = max(self._text_size.x + 60 * 2, self._min_width)
     self._rect.height = AlertConstants.BUTTON_HEIGHT
 
   def _render(self, _):
@@ -79,8 +79,8 @@ class ActionButton(Widget):
 
     # center text
     color = rl.WHITE if self._style == ButtonStyle.DARK else rl.BLACK
-    text_x = int(self._rect.x + (self._rect.width - self._text_width) // 2)
-    text_y = int(self._rect.y + (self._rect.height - AlertConstants.FONT_SIZE) // 2)
+    text_x = int(self._rect.x + (self._rect.width - self._text_size.x) // 2)
+    text_y = int(self._rect.y + (self._rect.height - self._text_size.y) // 2)
     rl.draw_text_ex(self._font, self._text, rl.Vector2(text_x, text_y), AlertConstants.FONT_SIZE, 0, color)
 
 
diff --git a/system/ui/lib/application.py b/system/ui/lib/application.py
index 473eaa5fa8..755a335e4d 100644
--- a/system/ui/lib/application.py
+++ b/system/ui/lib/application.py
@@ -30,6 +30,10 @@ SCALE = float(os.getenv("SCALE", "1.0"))
 DEFAULT_TEXT_SIZE = 60
 DEFAULT_TEXT_COLOR = rl.WHITE
 
+# Qt draws fonts accounting for ascent/descent differently, so compensate to match old styles
+# The real scales for the fonts below range from 1.212 to 1.266
+FONT_SCALE = 1.242
+
 ASSETS_DIR = files("openpilot.selfdrive").joinpath("assets")
 FONT_DIR = ASSETS_DIR.joinpath("fonts")
 
@@ -173,6 +177,7 @@ class GuiApplication:
     self._target_fps = fps
     self._set_styles()
     self._load_fonts()
+    self._patch_text_functions()
 
     if not PC:
       self._mouse.start()
@@ -356,6 +361,16 @@ class GuiApplication:
     rl.gui_set_style(rl.GuiControl.DEFAULT, rl.GuiControlProperty.TEXT_COLOR_NORMAL, rl.color_to_int(DEFAULT_TEXT_COLOR))
     rl.gui_set_style(rl.GuiControl.DEFAULT, rl.GuiControlProperty.BASE_COLOR_NORMAL, rl.color_to_int(rl.Color(50, 50, 50, 255)))
 
+  def _patch_text_functions(self):
+    # Wrap pyray text APIs to apply a global text size scale so our px sizes match Qt
+    if not hasattr(rl, "_orig_draw_text_ex"):
+      rl._orig_draw_text_ex = rl.draw_text_ex
+
+    def _draw_text_ex_scaled(font, text, position, font_size, spacing, tint):
+      return rl._orig_draw_text_ex(font, text, position, font_size * FONT_SCALE, spacing, tint)
+
+    rl.draw_text_ex = _draw_text_ex_scaled
+
   def _set_log_callback(self):
     ffi_libc = cffi.FFI()
     ffi_libc.cdef("""
diff --git a/system/ui/lib/text_measure.py b/system/ui/lib/text_measure.py
index c172f94251..fcb7b25ccd 100644
--- a/system/ui/lib/text_measure.py
+++ b/system/ui/lib/text_measure.py
@@ -1,4 +1,5 @@
 import pyray as rl
+from openpilot.system.ui.lib.application import FONT_SCALE
 
 _cache: dict[int, rl.Vector2] = {}
 
@@ -9,6 +10,6 @@ def measure_text_cached(font: rl.Font, text: str, font_size: int, spacing: int =
   if key in _cache:
     return _cache[key]
 
-  result = rl.measure_text_ex(font, text, font_size, spacing)  # noqa: TID251
+  result = rl.measure_text_ex(font, text, font_size * FONT_SCALE, spacing)  # noqa: TID251
   _cache[key] = result
   return result