e1baa7c105
* expose intrinsic size info on <svg> nodes.
* tweak the SkSVGDOM constructor to no longer take an container size
param, but instead default to intrinsic size
* update clients to call SkSVGDOM::setContainerSize() explicitly, when
needed
R=robertphillips@google.com,stephana@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2345533002
Review-Url: https://codereview.chromium.org/2345533002
110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkCanvas.h"
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#include "SkSVGRenderContext.h"
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#include "SkSVGSVG.h"
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#include "SkSVGValue.h"
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SkSVGSVG::SkSVGSVG() : INHERITED(SkSVGTag::kSvg) { }
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bool SkSVGSVG::onPrepareToRender(SkSVGRenderContext* ctx) const {
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auto viewPortRect = ctx->lengthContext().resolveRect(fX, fY, fWidth, fHeight);
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auto contentMatrix = SkMatrix::MakeTrans(viewPortRect.x(), viewPortRect.y());
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auto viewPort = SkSize::Make(viewPortRect.width(), viewPortRect.height());
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if (fViewBox.isValid()) {
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const SkRect& viewBox = *fViewBox.get();
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// An empty viewbox disables rendering.
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if (viewBox.isEmpty()) {
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return false;
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}
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// A viewBox overrides the intrinsic viewport.
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viewPort = SkSize::Make(viewBox.width(), viewBox.height());
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contentMatrix.preConcat(
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SkMatrix::MakeRectToRect(viewBox, viewPortRect, SkMatrix::kFill_ScaleToFit));
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}
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if (!contentMatrix.isIdentity()) {
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ctx->canvas()->save();
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ctx->canvas()->concat(contentMatrix);
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}
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if (viewPort != ctx->lengthContext().viewPort()) {
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ctx->writableLengthContext()->setViewPort(viewPort);
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}
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return this->INHERITED::onPrepareToRender(ctx);
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}
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void SkSVGSVG::setX(const SkSVGLength& x) {
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fX = x;
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}
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void SkSVGSVG::setY(const SkSVGLength& y) {
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fY = y;
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}
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void SkSVGSVG::setWidth(const SkSVGLength& w) {
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fWidth = w;
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}
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void SkSVGSVG::setHeight(const SkSVGLength& h) {
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fHeight = h;
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}
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void SkSVGSVG::setViewBox(const SkSVGViewBoxType& vb) {
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fViewBox.set(vb);
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}
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void SkSVGSVG::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
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switch (attr) {
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case SkSVGAttribute::kX:
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if (const auto* x = v.as<SkSVGLengthValue>()) {
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this->setX(*x);
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}
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break;
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case SkSVGAttribute::kY:
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if (const auto* y = v.as<SkSVGLengthValue>()) {
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this->setY(*y);
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}
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break;
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case SkSVGAttribute::kWidth:
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if (const auto* w = v.as<SkSVGLengthValue>()) {
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this->setWidth(*w);
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}
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break;
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case SkSVGAttribute::kHeight:
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if (const auto* h = v.as<SkSVGLengthValue>()) {
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this->setHeight(*h);
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}
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break;
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case SkSVGAttribute::kViewBox:
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if (const auto* vb = v.as<SkSVGViewBoxValue>()) {
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this->setViewBox(*vb);
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}
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break;
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default:
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this->INHERITED::onSetAttribute(attr, v);
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}
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}
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// https://www.w3.org/TR/SVG/coords.html#IntrinsicSizing
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SkSize SkSVGSVG::intrinsicSize(const SkSVGLengthContext& lctx) const {
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// Percentage values do not provide an intrinsic size.
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if (fWidth.unit() == SkSVGLength::Unit::kPercentage ||
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fHeight.unit() == SkSVGLength::Unit::kPercentage) {
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return SkSize::Make(0, 0);
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}
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return SkSize::Make(lctx.resolve(fWidth, SkSVGLengthContext::LengthType::kHorizontal),
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lctx.resolve(fHeight, SkSVGLengthContext::LengthType::kVertical));
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}
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