| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkGradientShader.h" |
| |
| typedef sk_sp<SkShader> (*MakeShaderProc)(const SkColor[], int count, const SkSize&); |
| |
| static sk_sp<SkShader> shader_linear(const SkColor colors[], int count, const SkSize& size) { |
| SkPoint pts[] = { { 0, 0 }, { size.width(), size.height() } }; |
| return SkGradientShader::MakeLinear(pts, colors, nullptr, count, SkTileMode::kClamp); |
| } |
| |
| static sk_sp<SkShader> shader_radial(const SkColor colors[], int count, const SkSize& size) { |
| SkPoint center = { size.width()/2, size.height()/2 }; |
| return SkGradientShader::MakeRadial(center, size.width()/2, colors, nullptr, count, |
| SkTileMode::kClamp); |
| } |
| |
| static sk_sp<SkShader> shader_conical(const SkColor colors[], int count, const SkSize& size) { |
| SkPoint center = { size.width()/2, size.height()/2 }; |
| return SkGradientShader::MakeTwoPointConical(center, size.width()/64, center, size.width()/2, |
| colors, nullptr, count, SkTileMode::kClamp); |
| } |
| |
| static sk_sp<SkShader> shader_sweep(const SkColor colors[], int count, const SkSize& size) { |
| return SkGradientShader::MakeSweep(size.width()/2, size.height()/2, colors, nullptr, count); |
| } |
| |
| class ShallowGradientGM : public skiagm::GM { |
| public: |
| ShallowGradientGM(MakeShaderProc proc, const char name[], bool dither) |
| : fProc(proc), fName(name), fDither(dither) {} |
| |
| private: |
| MakeShaderProc fProc; |
| const char* fName; |
| bool fDither; |
| |
| SkString getName() const override { |
| return SkStringPrintf("shallow_gradient_%s%s", fName, fDither ? "" : "_nodither"); |
| } |
| |
| SkISize getISize() override { return {800, 800}; } |
| |
| void onDraw(SkCanvas* canvas) override { |
| const SkColor colors[] = { 0xFF555555, 0xFF444444 }; |
| const int colorCount = std::size(colors); |
| |
| SkRect r = { 0, 0, this->width(), this->height() }; |
| SkSize size = SkSize::Make(r.width(), r.height()); |
| |
| SkPaint paint; |
| paint.setShader(fProc(colors, colorCount, size)); |
| paint.setDither(fDither); |
| canvas->drawRect(r, paint); |
| } |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #define M(PROC, DITHER) DEF_GM( return new ShallowGradientGM(shader_ ## PROC, #PROC, DITHER); ) |
| M(linear, true) |
| M(radial, true) |
| M(conical, true) |
| M(sweep, true) |
| |
| M(linear, false) |
| M(radial, false) |
| M(conical, false) |
| M(sweep, false) |
| #undef M |