layout/svg/SVGImageContext.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 // Main header first:
   8 #include "SVGImageContext.h"
   9
  10 // Keep others in (case-insensitive) order:
  11 #include "gfxUtils.h"
  12 #include "mozilla/Preferences.h"
  13 #include "nsIFrame.h"
  14 #include "nsPresContext.h"
  15 #include "nsStyleStruct.h"
  16
  17 namespace mozilla {
  18
  19 /* static */
  20 void SVGImageContext::MaybeStoreContextPaint(Maybe<SVGImageContext>& aContext,
  21                                              nsIFrame* aFromFrame,
  22                                              imgIContainer* aImgContainer) {
  23   return MaybeStoreContextPaint(aContext, aFromFrame->Style(), aImgContainer);
  24 }
  25
  26 /* static */
  27 void SVGImageContext::MaybeStoreContextPaint(
  28     Maybe<SVGImageContext>& aContext, const ComputedStyle* aFromComputedStyle,
  29     imgIContainer* aImgContainer) {
  30   const nsStyleSVG* style = aFromComputedStyle->StyleSVG();
  31
  32   if (!style->ExposesContextProperties()) {
  33     // Content must have '-moz-context-properties' set to the names of the
  34     // properties it wants to expose to images it links to.
  35     return;
  36   }
  37
  38   if (aImgContainer->GetType() != imgIContainer::TYPE_VECTOR) {
  39     // Avoid this overhead for raster images.
  40     return;
  41   }
  42
  43   bool haveContextPaint = false;
  44
  45   auto contextPaint = MakeRefPtr<SVGEmbeddingContextPaint>();
  46
  47   if ((style->mMozContextProperties.bits & StyleContextPropertyBits::FILL) &&
  48       style->mFill.kind.IsColor()) {
  49     haveContextPaint = true;
  50     contextPaint->SetFill(
  51         style->mFill.kind.AsColor().CalcColor(*aFromComputedStyle));
  52   }
  53   if ((style->mMozContextProperties.bits & StyleContextPropertyBits::STROKE) &&
  54       style->mStroke.kind.IsColor()) {
  55     haveContextPaint = true;
  56     contextPaint->SetStroke(
  57         style->mStroke.kind.AsColor().CalcColor(*aFromComputedStyle));
  58   }
  59   if (style->mMozContextProperties.bits &
  60       StyleContextPropertyBits::FILL_OPACITY) {
  61     haveContextPaint = true;
  62     contextPaint->SetFillOpacity(style->mFillOpacity.IsOpacity()
  63                                      ? style->mFillOpacity.AsOpacity()
  64                                      : 1.0f);
  65   }
  66   if (style->mMozContextProperties.bits &
  67       StyleContextPropertyBits::STROKE_OPACITY) {
  68     haveContextPaint = true;
  69     contextPaint->SetStrokeOpacity(style->mStrokeOpacity.IsOpacity()
  70                                        ? style->mStrokeOpacity.AsOpacity()
  71                                        : 1.0f);
  72   }
  73
  74   if (haveContextPaint) {
  75     if (!aContext) {
  76       aContext.emplace();
  77     }
  78     aContext->mContextPaint = std::move(contextPaint);
  79   }
  80 }
  81
  82 }  // namespace mozilla