| Florin Malita | cc6cc29 | 2017-10-09 16:05:30 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkGradientShader.h" |
| 9 | #include "SkSVGRadialGradient.h" |
| 10 | #include "SkSVGRenderContext.h" |
| 11 | #include "SkSVGValue.h" |
| 12 | |
| 13 | SkSVGRadialGradient::SkSVGRadialGradient() : INHERITED(SkSVGTag::kRadialGradient) {} |
| 14 | |
| 15 | void SkSVGRadialGradient::setCx(const SkSVGLength& cx) { |
| 16 | fCx = cx; |
| 17 | } |
| 18 | |
| 19 | void SkSVGRadialGradient::setCy(const SkSVGLength& cy) { |
| 20 | fCy = cy; |
| 21 | } |
| 22 | |
| 23 | void SkSVGRadialGradient::setR(const SkSVGLength& r) { |
| 24 | fR = r; |
| 25 | } |
| 26 | |
| 27 | void SkSVGRadialGradient::setFx(const SkSVGLength& fx) { |
| 28 | fFx.set(fx); |
| 29 | } |
| 30 | |
| 31 | void SkSVGRadialGradient::setFy(const SkSVGLength& fy) { |
| 32 | fFy.set(fy); |
| 33 | } |
| 34 | |
| 35 | void SkSVGRadialGradient::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) { |
| 36 | switch (attr) { |
| 37 | case SkSVGAttribute::kCx: |
| 38 | if (const auto* cx = v.as<SkSVGLengthValue>()) { |
| 39 | this->setCx(*cx); |
| 40 | } |
| 41 | break; |
| 42 | case SkSVGAttribute::kCy: |
| 43 | if (const auto* cy = v.as<SkSVGLengthValue>()) { |
| 44 | this->setCy(*cy); |
| 45 | } |
| 46 | break; |
| 47 | case SkSVGAttribute::kR: |
| 48 | if (const auto* r = v.as<SkSVGLengthValue>()) { |
| 49 | this->setR(*r); |
| 50 | } |
| 51 | break; |
| 52 | case SkSVGAttribute::kFx: |
| 53 | if (const auto* fx = v.as<SkSVGLengthValue>()) { |
| 54 | this->setFx(*fx); |
| 55 | } |
| 56 | break; |
| 57 | case SkSVGAttribute::kFy: |
| 58 | if (const auto* fy = v.as<SkSVGLengthValue>()) { |
| 59 | this->setFy(*fy); |
| 60 | } |
| 61 | break; |
| 62 | default: |
| 63 | this->INHERITED::onSetAttribute(attr, v); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | sk_sp<SkShader> SkSVGRadialGradient::onMakeShader(const SkSVGRenderContext& ctx, |
| 68 | const SkColor* colors, const SkScalar* pos, |
| 69 | int count, SkShader::TileMode tm, |
| 70 | const SkMatrix& m) const { |
| 71 | const auto& lctx = ctx.lengthContext(); |
| 72 | const auto r = lctx.resolve(fR , SkSVGLengthContext::LengthType::kOther); |
| 73 | const auto center = SkPoint::Make( |
| 74 | lctx.resolve(fCx, SkSVGLengthContext::LengthType::kHorizontal), |
| 75 | lctx.resolve(fCy, SkSVGLengthContext::LengthType::kVertical)); |
| 76 | const auto focal = SkPoint::Make( |
| 77 | fFx.isValid() ? lctx.resolve(*fFx.get(), SkSVGLengthContext::LengthType::kHorizontal) |
| 78 | : center.x(), |
| 79 | fFy.isValid() ? lctx.resolve(*fFy.get(), SkSVGLengthContext::LengthType::kVertical) |
| 80 | : center.y()); |
| 81 | |
| 82 | return center == focal |
| 83 | ? SkGradientShader::MakeRadial(center, r, colors, pos, count, tm, 0, &m) |
| 84 | : SkGradientShader::MakeTwoPointConical(focal, 0, center, r, colors, pos, count, tm, 0, &m); |
| 85 | } |