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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkGradientShader.h"
#include "SkSVGRadialGradient.h"
#include "SkSVGRenderContext.h"
#include "SkSVGValue.h"
SkSVGRadialGradient::SkSVGRadialGradient() : INHERITED(SkSVGTag::kRadialGradient) {}
void SkSVGRadialGradient::setCx(const SkSVGLength& cx) {
fCx = cx;
}
void SkSVGRadialGradient::setCy(const SkSVGLength& cy) {
fCy = cy;
}
void SkSVGRadialGradient::setR(const SkSVGLength& r) {
fR = r;
}
void SkSVGRadialGradient::setFx(const SkSVGLength& fx) {
fFx.set(fx);
}
void SkSVGRadialGradient::setFy(const SkSVGLength& fy) {
fFy.set(fy);
}
void SkSVGRadialGradient::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
switch (attr) {
case SkSVGAttribute::kCx:
if (const auto* cx = v.as<SkSVGLengthValue>()) {
this->setCx(*cx);
}
break;
case SkSVGAttribute::kCy:
if (const auto* cy = v.as<SkSVGLengthValue>()) {
this->setCy(*cy);
}
break;
case SkSVGAttribute::kR:
if (const auto* r = v.as<SkSVGLengthValue>()) {
this->setR(*r);
}
break;
case SkSVGAttribute::kFx:
if (const auto* fx = v.as<SkSVGLengthValue>()) {
this->setFx(*fx);
}
break;
case SkSVGAttribute::kFy:
if (const auto* fy = v.as<SkSVGLengthValue>()) {
this->setFy(*fy);
}
break;
default:
this->INHERITED::onSetAttribute(attr, v);
}
}
sk_sp<SkShader> SkSVGRadialGradient::onMakeShader(const SkSVGRenderContext& ctx,
const SkColor* colors, const SkScalar* pos,
int count, SkShader::TileMode tm,
const SkMatrix& m) const {
const auto& lctx = ctx.lengthContext();
const auto r = lctx.resolve(fR , SkSVGLengthContext::LengthType::kOther);
const auto center = SkPoint::Make(
lctx.resolve(fCx, SkSVGLengthContext::LengthType::kHorizontal),
lctx.resolve(fCy, SkSVGLengthContext::LengthType::kVertical));
const auto focal = SkPoint::Make(
fFx.isValid() ? lctx.resolve(*fFx.get(), SkSVGLengthContext::LengthType::kHorizontal)
: center.x(),
fFy.isValid() ? lctx.resolve(*fFy.get(), SkSVGLengthContext::LengthType::kVertical)
: center.y());
return center == focal
? SkGradientShader::MakeRadial(center, r, colors, pos, count, tm, 0, &m)
: SkGradientShader::MakeTwoPointConical(focal, 0, center, r, colors, pos, count, tm, 0, &m);
}
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