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-rw-r--r--layout/svg/DisplaySVGItem.cpp58
1 files changed, 58 insertions, 0 deletions
diff --git a/layout/svg/DisplaySVGItem.cpp b/layout/svg/DisplaySVGItem.cpp
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+++ b/layout/svg/DisplaySVGItem.cpp
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+/* -*- 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/. */
+
+// Main header first:
+#include "DisplaySVGItem.h"
+
+#include "mozilla/ISVGDisplayableFrame.h"
+#include "mozilla/SVGUtils.h"
+#include "nsLayoutUtils.h"
+#include "nsPoint.h"
+
+using namespace mozilla::gfx;
+using namespace mozilla::image;
+
+namespace mozilla {
+
+void DisplaySVGItem::HitTest(nsDisplayListBuilder* aBuilder,
+ const nsRect& aRect, HitTestState* aState,
+ nsTArray<nsIFrame*>* aOutFrames) {
+ ISVGDisplayableFrame* svgFrame = do_QueryFrame(mFrame);
+ MOZ_ASSERT(svgFrame, "Unexpected frame type");
+
+ nsPoint pointRelativeToReferenceFrame = aRect.Center();
+ // ToReferenceFrame() includes mFrame->GetPosition(), our user
+ // space position.
+ nsPoint userSpacePtInAppUnits = pointRelativeToReferenceFrame -
+ (ToReferenceFrame() - mFrame->GetPosition());
+ gfxPoint userSpacePt =
+ gfxPoint(userSpacePtInAppUnits.x, userSpacePtInAppUnits.y) /
+ AppUnitsPerCSSPixel();
+ if (auto* target = svgFrame->GetFrameForPoint(userSpacePt)) {
+ aOutFrames->AppendElement(target);
+ }
+}
+
+void DisplaySVGItem::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) {
+ ISVGDisplayableFrame* svgFrame = do_QueryFrame(mFrame);
+ MOZ_ASSERT(svgFrame, "Unexpected frame type");
+ int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
+
+ // ToReferenceFrame() includes our mRect offset, but painting takes
+ // account of that too. To avoid double counting, we subtract that
+ // here.
+ nsPoint offset = ToReferenceFrame() - mFrame->GetPosition();
+
+ gfxPoint devPixelOffset =
+ nsLayoutUtils::PointToGfxPoint(offset, appUnitsPerDevPixel);
+
+ gfxMatrix tm = SVGUtils::GetCSSPxToDevPxMatrix(mFrame) *
+ gfxMatrix::Translation(devPixelOffset);
+ imgDrawingParams imgParams(aBuilder->GetImageDecodeFlags());
+ svgFrame->PaintSVG(*aCtx, tm, imgParams);
+}
+
+} // namespace mozilla