From 3bd9a8e01422bafa02d55d199221254edde007e9 Mon Sep 17 00:00:00 2001
From: Guillaume Ayoub <guillaume@courtbouillon.org>
Date: Tue, 5 Jul 2022 16:06:46 +0200
Subject: [PATCH] =?UTF-8?q?Don=E2=80=99t=20limit=20the=20opacity=20groups?=
 =?UTF-8?q?=20to=20the=20original=20box=20size?=
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It doesn’t work when elements are displayed outside or when the box is
transformed.
---
 tests/draw/test_transform.py | 22 ++++++++++++++++++++++
 weasyprint/draw.py           |  5 +----
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/tests/draw/test_transform.py b/tests/draw/test_transform.py
index 5b908a60c..c8c9ee54a 100644
--- a/tests/draw/test_transform.py
+++ b/tests/draw/test_transform.py
@@ -285,3 +285,25 @@ def test_2d_transform_13(assert_pixels):
               font-size: 0 }
       </style>
       <div><img src="pattern.png"></div>''')
+
+
+@assert_no_logs
+def test_2d_transform_opacity(assert_pixels):
+    assert_pixels('''
+        __________
+        __________
+        __________
+        _ss_______
+        _ss_______
+        __________
+        __________
+        __________
+        __________
+        __________
+    ''', '''
+      <style>
+        @page { size: 10px; margin: 2px; }
+        div { transform: translate(-1px, 1px); background: red;
+              height: 2px; width: 2px; opacity: 0.5 }
+      </style>
+      <div></div>''')
diff --git a/weasyprint/draw.py b/weasyprint/draw.py
index 32fd21946..692dcb970 100644
--- a/weasyprint/draw.py
+++ b/weasyprint/draw.py
@@ -108,10 +108,7 @@ def draw_stacking_context(stream, stacking_context):
 
         if box.style['opacity'] < 1:
             original_stream = stream
-            stream = stream.add_group([
-                box.border_box_x(), box.border_box_y(),
-                box.border_box_x() + box.border_width(),
-                box.border_box_y() + box.border_height()])
+            stream = stream.add_group(stream.page_rectangle)
 
         if box.transformation_matrix:
             if box.transformation_matrix.determinant: