diff --git a/lib/matplotlib/backends/backend_gtk3cairo.py b/lib/matplotlib/backends/backend_gtk3cairo.py
index 24a26111f062..371b8dc1b31f 100644
--- a/lib/matplotlib/backends/backend_gtk3cairo.py
+++ b/lib/matplotlib/backends/backend_gtk3cairo.py
@@ -13,15 +13,19 @@ def on_draw_event(self, widget, ctx):
with (self.toolbar._wait_cursor_for_draw_cm() if self.toolbar
else nullcontext()):
- self._renderer.set_context(ctx)
- scale = self.device_pixel_ratio
- # Scale physical drawing to logical size.
- ctx.scale(1 / scale, 1 / scale)
allocation = self.get_allocation()
+ # Render the background before scaling, as the allocated size here is in
+ # logical pixels.
Gtk.render_background(
self.get_style_context(), ctx,
- allocation.x, allocation.y,
- allocation.width, allocation.height)
+ 0, 0, allocation.width, allocation.height)
+ scale = self.device_pixel_ratio
+ # Scale physical drawing to logical size.
+ ctx.scale(1 / scale, 1 / scale)
+ self._renderer.set_context(ctx)
+ # Set renderer to physical size so it renders in full resolution.
+ self._renderer.width = allocation.width * scale
+ self._renderer.height = allocation.height * scale
self._renderer.dpi = self.figure.dpi
self.figure.draw(self._renderer)
diff --git a/lib/matplotlib/backends/backend_gtk4.py b/lib/matplotlib/backends/backend_gtk4.py
index 256a8ec9e864..dd86ab628ce7 100644
--- a/lib/matplotlib/backends/backend_gtk4.py
+++ b/lib/matplotlib/backends/backend_gtk4.py
@@ -34,7 +34,6 @@ class FigureCanvasGTK4(_FigureCanvasGTK, Gtk.DrawingArea):
required_interactive_framework = "gtk4"
supports_blit = False
manager_class = _api.classproperty(lambda cls: FigureManagerGTK4)
- _context_is_scaled = False
def __init__(self, figure=None):
super().__init__(figure=figure)
@@ -228,13 +227,8 @@ def _post_draw(self, widget, ctx):
lw = 1
dash = 3
- if not self._context_is_scaled:
- x0, y0, w, h = (dim / self.device_pixel_ratio
- for dim in self._rubberband_rect)
- else:
- x0, y0, w, h = self._rubberband_rect
- lw *= self.device_pixel_ratio
- dash *= self.device_pixel_ratio
+ x0, y0, w, h = (dim / self.device_pixel_ratio
+ for dim in self._rubberband_rect)
x1 = x0 + w
y1 = y0 + h
diff --git a/lib/matplotlib/backends/backend_gtk4cairo.py b/lib/matplotlib/backends/backend_gtk4cairo.py
index b1d543704351..838ea03fcce6 100644
--- a/lib/matplotlib/backends/backend_gtk4cairo.py
+++ b/lib/matplotlib/backends/backend_gtk4cairo.py
@@ -5,7 +5,10 @@
class FigureCanvasGTK4Cairo(FigureCanvasCairo, FigureCanvasGTK4):
- _context_is_scaled = True
+ def _set_device_pixel_ratio(self, ratio):
+ # Cairo in GTK4 always uses logical pixels, so we don't need to do anything for
+ # changes to the device pixel ratio.
+ return False
def on_draw_event(self, widget, ctx):
if self._idle_draw_id:
@@ -16,15 +19,11 @@ def on_draw_event(self, widget, ctx):
with (self.toolbar._wait_cursor_for_draw_cm() if self.toolbar
else nullcontext()):
self._renderer.set_context(ctx)
- scale = self.device_pixel_ratio
- # Scale physical drawing to logical size.
- ctx.scale(1 / scale, 1 / scale)
allocation = self.get_allocation()
Gtk.render_background(
self.get_style_context(), ctx,
allocation.x, allocation.y,
allocation.width, allocation.height)
- self._renderer.dpi = self.figure.dpi
self.figure.draw(self._renderer)
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