#240 Fix text blurring with opacity close to 1.0

build/patches/Viewport-Protection-flag.patch

@@ -18,6 +18,7 @@ Require: Content-settings-infrastructure.patch
  .../features_cc/Viewport-Protection-flag.inc  |  3 +
  .../features_h/Viewport-Protection-flag.inc   |  2 +
  .../common/widget/device_emulation_params.h   |  6 +-
+ .../renderer/core/css/css_properties.json5    |  2 +-
  .../blink/renderer/core/css/media_values.cc   |  2 +-
  .../core/css/resolver/style_resolver.cc       |  7 +-
  .../blink/renderer/core/events/mouse_event.h  | 19 +++-
@@ -33,7 +34,8 @@ Require: Content-settings-infrastructure.patch
  .../blink/renderer/core/input/touch.cc        | 17 +++-
  third_party/blink/renderer/core/page/page.cc  | 93 ++++++++++++++++++
  third_party/blink/renderer/core/page/page.h   |  9 ++
- 24 files changed, 423 insertions(+), 19 deletions(-)
+ .../renderer/core/style/computed_style.h      |  6 ++
+ 26 files changed, 430 insertions(+), 20 deletions(-)
  create mode 100644 components/browser_ui/site_settings/android/java/src/org/chromium/components/browser_ui/site_settings/impl/BromiteViewportContentSetting.java
  create mode 100644 components/browser_ui/strings/bromite_content_settings/viewport.grdp
  create mode 100644 components/content_settings/core/browser/bromite_content_settings/viewport.inc
@@ -277,6 +279,25 @@ diff --git a/third_party/blink/public/common/widget/device_emulation_params.h b/
  }
 
  inline bool operator!=(const DeviceEmulationParams& a,
+diff --git a/third_party/blink/renderer/core/css/css_properties.json5 b/third_party/blink/renderer/core/css/css_properties.json5
+--- a/third_party/blink/renderer/core/css/css_properties.json5
++++ b/third_party/blink/renderer/core/css/css_properties.json5
+@@ -3709,6 +3709,7 @@
+     },
+     {
+       name: "opacity",
++      computed_style_custom_functions: ["setter","getter"],
+       property_methods: ["ParseSingleValue", "CSSValueFromComputedStyleInternal"],
+       interpolable: true,
+       compositable: true,
+@@ -3716,7 +3717,6 @@
+       field_template: "primitive",
+       default_value: "1.0",
+       type_name: "float",
+-      computed_style_custom_functions: ["setter"],
+       typedom_types: ["Number"],
+       valid_for_first_letter: true,
+       valid_for_first_line: true,
 diff --git a/third_party/blink/renderer/core/css/media_values.cc b/third_party/blink/renderer/core/css/media_values.cc
 --- a/third_party/blink/renderer/core/css/media_values.cc
 +++ b/third_party/blink/renderer/core/css/media_values.cc
@@ -639,7 +660,7 @@ diff --git a/third_party/blink/renderer/core/frame/screen_metrics_emulator.h b/t
 diff --git a/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc b/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc
 --- a/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc
 +++ b/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc
-@@ -1765,6 +1765,14 @@ void WebFrameWidgetImpl::ApplyVisualPropertiesSizing(
+@@ -1771,6 +1771,14 @@ void WebFrameWidgetImpl::ApplyVisualPropertiesSizing(
 
      if (auto* device_emulator = DeviceEmulator()) {
        device_emulator->UpdateVisualProperties(visual_properties);
@@ -845,4 +866,20 @@ diff --git a/third_party/blink/renderer/core/page/page.h b/third_party/blink/ren
    // This tracks the mode that the fenced frame is set to.
    blink::FencedFrame::DeprecatedFencedFrameMode fenced_frame_mode_ =
        blink::FencedFrame::DeprecatedFencedFrameMode::kDefault;
+diff --git a/third_party/blink/renderer/core/style/computed_style.h b/third_party/blink/renderer/core/style/computed_style.h
+--- a/third_party/blink/renderer/core/style/computed_style.h
++++ b/third_party/blink/renderer/core/style/computed_style.h
+@@ -1940,6 +1940,12 @@ class ComputedStyle final : public ComputedStyleBase {
+            IsRunningBackdropFilterAnimationOnCompositor();
+   }
+
++  float Opacity() const {
++    float v = OpacityInternal();
++    if (v >= 0.991f) v = 1.0f;
++    return v;
++  }
++
+   // Opacity utility functions.
+   bool HasOpacity() const { return Opacity() < 1.0f; }
+
 --