blob: 389ac2a7c7e94d934297dd63daa9b7c301956068 [file] [log] [blame]
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "modules/svg/include/SkSVGRenderContext.h"
#include "modules/svg/include/SkSVGSVG.h"
#include "modules/svg/include/SkSVGValue.h"
void SkSVGSVG::renderNode(const SkSVGRenderContext& ctx, const SkSVGIRI& iri) const {
SkSVGRenderContext localContext(ctx, this);
SkSVGRenderContext::BorrowedNode node = localContext.findNodeById(iri);
if (!node) {
return;
}
if (this->onPrepareToRender(&localContext)) {
if (this == node.get()) {
this->onRender(ctx);
} else {
node->render(localContext);
}
}
}
bool SkSVGSVG::onPrepareToRender(SkSVGRenderContext* ctx) const {
// x/y are ignored for outermost svg elements
const auto x = fType == Type::kInner ? fX : SkSVGLength(0);
const auto y = fType == Type::kInner ? fY : SkSVGLength(0);
auto viewPortRect = ctx->lengthContext().resolveRect(x, y, fWidth, fHeight);
auto contentMatrix = SkMatrix::Translate(viewPortRect.x(), viewPortRect.y());
auto viewPort = SkSize::Make(viewPortRect.width(), viewPortRect.height());
if (fViewBox.isValid()) {
const SkRect& viewBox = *fViewBox;
// An empty viewbox disables rendering.
if (viewBox.isEmpty()) {
return false;
}
// A viewBox overrides the intrinsic viewport.
viewPort = SkSize::Make(viewBox.width(), viewBox.height());
contentMatrix.preConcat(ComputeViewboxMatrix(viewBox, viewPortRect, fPreserveAspectRatio));
}
if (!contentMatrix.isIdentity()) {
ctx->saveOnce();
ctx->canvas()->concat(contentMatrix);
}
if (viewPort != ctx->lengthContext().viewPort()) {
ctx->writableLengthContext()->setViewPort(viewPort);
}
return this->INHERITED::onPrepareToRender(ctx);
}
void SkSVGSVG::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
switch (attr) {
case SkSVGAttribute::kX:
if (const auto* x = v.as<SkSVGLengthValue>()) {
this->setX(*x);
}
break;
case SkSVGAttribute::kY:
if (const auto* y = v.as<SkSVGLengthValue>()) {
this->setY(*y);
}
break;
case SkSVGAttribute::kWidth:
if (const auto* w = v.as<SkSVGLengthValue>()) {
this->setWidth(*w);
}
break;
case SkSVGAttribute::kHeight:
if (const auto* h = v.as<SkSVGLengthValue>()) {
this->setHeight(*h);
}
break;
case SkSVGAttribute::kViewBox:
if (const auto* vb = v.as<SkSVGViewBoxValue>()) {
this->setViewBox(*vb);
}
break;
case SkSVGAttribute::kPreserveAspectRatio:
if (const auto* par = v.as<SkSVGPreserveAspectRatioValue>()) {
this->setPreserveAspectRatio(*par);
}
break;
default:
this->INHERITED::onSetAttribute(attr, v);
}
}
// https://www.w3.org/TR/SVG11/coords.html#IntrinsicSizing
SkSize SkSVGSVG::intrinsicSize(const SkSVGLengthContext& lctx) const {
// Percentage values do not provide an intrinsic size.
if (fWidth.unit() == SkSVGLength::Unit::kPercentage ||
fHeight.unit() == SkSVGLength::Unit::kPercentage) {
return SkSize::Make(0, 0);
}
return SkSize::Make(lctx.resolve(fWidth, SkSVGLengthContext::LengthType::kHorizontal),
lctx.resolve(fHeight, SkSVGLengthContext::LengthType::kVertical));
}