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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
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