1 files changed, 81 insertions, 0 deletions
diff --git a/layout/style/StyleColor.cpp b/layout/style/StyleColor.cpp
new file mode 100644
index 0000000000..df58cf093d
--- /dev/null
+++ b/layout/style/StyleColor.cpp
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/StyleColorInlines.h"
+
+#include "mozilla/ComputedStyle.h"
+#include "mozilla/ComputedStyleInlines.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "nsIFrame.h"
+#include "nsStyleStruct.h"
+
+namespace mozilla {
+
+template <>
+bool StyleColor::MaybeTransparent() const {
+  // We know that the color is opaque when it's a numeric color with
+  // alpha == 1.0.
+  return !IsAbsolute() || AsAbsolute().alpha != 1.0f;
+}
+
+template <>
+StyleAbsoluteColor StyleColor::ResolveColor(
+    const StyleAbsoluteColor& aForegroundColor) const {
+  if (IsAbsolute()) {
+    return AsAbsolute();
+  }
+
+  if (IsCurrentColor()) {
+    return aForegroundColor;
+  }
+
+  MOZ_ASSERT(IsColorMix(), "should be the only type left at this point.");
+  return Servo_ResolveColor(this, &aForegroundColor);
+}
+
+template <>
+nscolor StyleColor::CalcColor(nscolor aColor) const {
+  return ResolveColor(StyleAbsoluteColor::FromColor(aColor)).ToColor();
+}
+
+template <>
+nscolor StyleColor::CalcColor(
+    const StyleAbsoluteColor& aForegroundColor) const {
+  return ResolveColor(aForegroundColor).ToColor();
+}
+
+template <>
+nscolor StyleColor::CalcColor(const ComputedStyle& aStyle) const {
+  return ResolveColor(aStyle.StyleText()->mColor).ToColor();
+}
+
+template <>
+nscolor StyleColor::CalcColor(const nsIFrame* aFrame) const {
+  return ResolveColor(aFrame->StyleText()->mColor).ToColor();
+}
+
+StyleAbsoluteColor StyleAbsoluteColor::ToColorSpace(
+    StyleColorSpace aColorSpace) const {
+  return Servo_ConvertColorSpace(this, aColorSpace);
+}
+
+nscolor StyleAbsoluteColor::ToColor() const {
+  auto srgb = ToColorSpace(StyleColorSpace::Srgb);
+
+  // TODO(tlouw): Needs gamut mapping here. Right now we just hard clip the
+  //              components to [0..1], which will yield invalid colors.
+  //              https://bugzilla.mozilla.org/show_bug.cgi?id=1626624
+  auto red = std::clamp(srgb.components._0, 0.0f, 1.0f);
+  auto green = std::clamp(srgb.components._1, 0.0f, 1.0f);
+  auto blue = std::clamp(srgb.components._2, 0.0f, 1.0f);
+
+  return NS_RGBA(nsStyleUtil::FloatToColorComponent(red),
+                 nsStyleUtil::FloatToColorComponent(green),
+                 nsStyleUtil::FloatToColorComponent(blue),
+                 nsStyleUtil::FloatToColorComponent(srgb.alpha));
+}
+
+}  // namespace mozilla