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/*
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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 <tuple>
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#include "include/core/SkCanvas.h"
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#include "include/core/SkRect.h"
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#include "modules/svg/include/SkSVGRect.h"
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#include "modules/svg/include/SkSVGRenderContext.h"
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#include "modules/svg/include/SkSVGValue.h"
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SkSVGRect::SkSVGRect() : INHERITED(SkSVGTag::kRect) {}
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bool SkSVGRect::parseAndSetAttribute(const char* n, const char* v) {
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return INHERITED::parseAndSetAttribute(n, v) ||
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this->setX(SkSVGAttributeParser::parse<SkSVGLength>("x", n, v)) ||
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this->setY(SkSVGAttributeParser::parse<SkSVGLength>("y", n, v)) ||
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this->setWidth(SkSVGAttributeParser::parse<SkSVGLength>("width", n, v)) ||
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this->setHeight(SkSVGAttributeParser::parse<SkSVGLength>("height", n, v)) ||
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this->setRx(SkSVGAttributeParser::parse<SkSVGLength>("rx", n, v)) ||
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this->setRy(SkSVGAttributeParser::parse<SkSVGLength>("ry", n, v));
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}
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SkRRect SkSVGRect::resolve(const SkSVGLengthContext& lctx) const {
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const auto rect = lctx.resolveRect(fX, fY, fWidth, fHeight);
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// https://www.w3.org/TR/SVG11/shapes.html#RectElementRXAttribute:
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//
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// - Let rx and ry be length values.
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// - If neither ‘rx’ nor ‘ry’ are properly specified, then set both rx and ry to 0.
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// - Otherwise, if a properly specified value is provided for ‘rx’, but not for ‘ry’,
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// then set both rx and ry to the value of ‘rx’.
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// - Otherwise, if a properly specified value is provided for ‘ry’, but not for ‘rx’,
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// then set both rx and ry to the value of ‘ry’.
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// - Otherwise, both ‘rx’ and ‘ry’ were specified properly. Set rx to the value of ‘rx’
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// and ry to the value of ‘ry’.
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// - If rx is greater than half of ‘width’, then set rx to half of ‘width’.
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// - If ry is greater than half of ‘height’, then set ry to half of ‘height’.
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// - The effective values of ‘rx’ and ‘ry’ are rx and ry, respectively.
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//
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auto radii = [this]() {
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return fRx.isValid()
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? fRy.isValid()
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? std::make_tuple(*fRx, *fRy)
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: std::make_tuple(*fRx, *fRx)
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: fRy.isValid()
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? std::make_tuple(*fRy, *fRy)
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: std::make_tuple(SkSVGLength(0), SkSVGLength(0));
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};
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const auto [ rxlen, rylen ] = radii();
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const auto rx = std::min(lctx.resolve(rxlen, SkSVGLengthContext::LengthType::kHorizontal),
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rect.width() / 2),
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ry = std::min(lctx.resolve(rylen, SkSVGLengthContext::LengthType::kVertical),
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rect.height() / 2);
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return SkRRect::MakeRectXY(rect, rx, ry);
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}
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void SkSVGRect::onDraw(SkCanvas* canvas, const SkSVGLengthContext& lctx,
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const SkPaint& paint, SkPathFillType) const {
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canvas->drawRRect(this->resolve(lctx), paint);
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}
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SkPath SkSVGRect::onAsPath(const SkSVGRenderContext& ctx) const {
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SkPath path = SkPath::RRect(this->resolve(ctx.lengthContext()));
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this->mapToParent(&path);
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return path;
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}
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SkRect SkSVGRect::onObjectBoundingBox(const SkSVGRenderContext& ctx) const {
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return ctx.lengthContext().resolveRect(fX, fY, fWidth, fHeight);
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}
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