forked from mirrors/gecko-dev
58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Main header first:
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#include "DisplaySVGItem.h"
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#include "mozilla/ISVGDisplayableFrame.h"
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#include "mozilla/SVGUtils.h"
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#include "nsLayoutUtils.h"
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#include "nsPoint.h"
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using namespace mozilla::gfx;
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using namespace mozilla::image;
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namespace mozilla {
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void DisplaySVGItem::HitTest(nsDisplayListBuilder* aBuilder,
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const nsRect& aRect, HitTestState* aState,
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nsTArray<nsIFrame*>* aOutFrames) {
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ISVGDisplayableFrame* svgFrame = do_QueryFrame(mFrame);
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MOZ_ASSERT(svgFrame, "Unexpected frame type");
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nsPoint pointRelativeToReferenceFrame = aRect.Center();
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// ToReferenceFrame() includes mFrame->GetPosition(), our user
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// space position.
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nsPoint userSpacePtInAppUnits = pointRelativeToReferenceFrame -
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(ToReferenceFrame() - mFrame->GetPosition());
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gfxPoint userSpacePt =
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gfxPoint(userSpacePtInAppUnits.x, userSpacePtInAppUnits.y) /
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AppUnitsPerCSSPixel();
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if (auto* target = svgFrame->GetFrameForPoint(userSpacePt)) {
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aOutFrames->AppendElement(target);
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}
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}
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void DisplaySVGItem::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) {
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ISVGDisplayableFrame* svgFrame = do_QueryFrame(mFrame);
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MOZ_ASSERT(svgFrame, "Unexpected frame type");
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int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
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// ToReferenceFrame() includes our mRect offset, but painting takes
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// account of that too. To avoid double counting, we subtract that
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// here.
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nsPoint offset = ToReferenceFrame() - mFrame->GetPosition();
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gfxPoint devPixelOffset =
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nsLayoutUtils::PointToGfxPoint(offset, appUnitsPerDevPixel);
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gfxMatrix tm = SVGUtils::GetCSSPxToDevPxMatrix(mFrame) *
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gfxMatrix::Translation(devPixelOffset);
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imgDrawingParams imgParams(aBuilder->GetImageDecodeFlags());
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svgFrame->PaintSVG(*aCtx, tm, imgParams);
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}
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} // namespace mozilla
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