blob: 9a3411765e9cbdcce02ceb0d4e9e5d1cec63eb8b [file] [log] [blame]
/*
* 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 "include/core/SkColorSpace.h"
#include "include/effects/SkGradientShader.h"
#include "modules/svg/include/SkSVGRadialGradient.h"
#include "modules/svg/include/SkSVGRenderContext.h"
#include "modules/svg/include/SkSVGValue.h"
SkSVGRadialGradient::SkSVGRadialGradient() : INHERITED(SkSVGTag::kRadialGradient) {}
bool SkSVGRadialGradient::parseAndSetAttribute(const char* name, const char* value) {
return INHERITED::parseAndSetAttribute(name, value) ||
this->setCx(SkSVGAttributeParser::parse<SkSVGLength>("cx", name, value)) ||
this->setCy(SkSVGAttributeParser::parse<SkSVGLength>("cy", name, value)) ||
this->setR(SkSVGAttributeParser::parse<SkSVGLength>("r", name, value)) ||
this->setFx(SkSVGAttributeParser::parse<SkSVGLength>("fx", name, value)) ||
this->setFy(SkSVGAttributeParser::parse<SkSVGLength>("fy", name, value));
}
sk_sp<SkShader> SkSVGRadialGradient::onMakeShader(const SkSVGRenderContext& ctx,
const SkColor4f* colors, const SkScalar* pos,
int count, SkTileMode tm,
const SkMatrix& m) const {
const SkSVGLengthContext lctx =
this->getGradientUnits().type() == SkSVGObjectBoundingBoxUnits::Type::kObjectBoundingBox
? SkSVGLengthContext({1, 1})
: 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, SkSVGLengthContext::LengthType::kHorizontal)
: center.x(),
fFy.isValid() ? lctx.resolve(*fFy, SkSVGLengthContext::LengthType::kVertical)
: center.y());
if (r == 0) {
const auto last_color = count > 0 ? colors[count - 1] : SkColors::kBlack;
return SkShaders::Color(last_color, nullptr);
}
return center == focal
? SkGradientShader::MakeRadial(center, r, colors, nullptr, pos, count, tm, 0, &m)
: SkGradientShader::MakeTwoPointConical(focal, 0, center, r, colors, nullptr, pos,
count, tm, 0, &m);
}