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84 lines
3.0 KiB
84 lines
3.0 KiB
4 months ago
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/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkGradientShader.h"
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typedef sk_sp<SkShader> (*MakeShaderProc)(const SkColor[], int count, const SkSize&);
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static sk_sp<SkShader> shader_linear(const SkColor colors[], int count, const SkSize& size) {
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SkPoint pts[] = { { 0, 0 }, { size.width(), size.height() } };
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return SkGradientShader::MakeLinear(pts, colors, nullptr, count, SkShader::kClamp_TileMode);
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}
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static sk_sp<SkShader> shader_radial(const SkColor colors[], int count, const SkSize& size) {
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SkPoint center = { size.width()/2, size.height()/2 };
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return SkGradientShader::MakeRadial(center, size.width()/2, colors, nullptr, count,
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SkShader::kClamp_TileMode);
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}
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static sk_sp<SkShader> shader_conical(const SkColor colors[], int count, const SkSize& size) {
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SkPoint center = { size.width()/2, size.height()/2 };
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return SkGradientShader::MakeTwoPointConical(center, size.width()/64, center, size.width()/2,
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colors, nullptr, count, SkShader::kClamp_TileMode);
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}
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static sk_sp<SkShader> shader_sweep(const SkColor colors[], int count, const SkSize& size) {
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return SkGradientShader::MakeSweep(size.width()/2, size.height()/2, colors, nullptr, count);
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}
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class ShallowGradientGM : public skiagm::GM {
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public:
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ShallowGradientGM(MakeShaderProc proc, const char name[], bool dither)
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: fProc(proc)
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, fDither(dither) {
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fName.printf("shallow_gradient_%s", name);
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}
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protected:
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SkString onShortName() override {
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return fName;
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}
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SkISize onISize() override {
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return SkISize::Make(800, 800);
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}
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void onDraw(SkCanvas* canvas) override {
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const SkColor colors[] = { 0xFF555555, 0xFF444444 };
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const int colorCount = SK_ARRAY_COUNT(colors);
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SkRect r = { 0, 0, this->width(), this->height() };
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SkSize size = SkSize::Make(r.width(), r.height());
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SkPaint paint;
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paint.setShader(fProc(colors, colorCount, size));
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paint.setDither(fDither);
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canvas->drawRect(r, paint);
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}
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private:
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MakeShaderProc fProc;
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SkString fName;
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bool fDither;
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typedef skiagm::GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new ShallowGradientGM(shader_linear, "linear", true); )
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DEF_GM( return new ShallowGradientGM(shader_radial, "radial", true); )
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DEF_GM( return new ShallowGradientGM(shader_conical, "conical", true); )
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DEF_GM( return new ShallowGradientGM(shader_sweep, "sweep", true); )
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DEF_GM( return new ShallowGradientGM(shader_linear, "linear_nodither", false); )
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DEF_GM( return new ShallowGradientGM(shader_radial, "radial_nodither", false); )
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DEF_GM( return new ShallowGradientGM(shader_conical, "conical_nodither", false); )
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DEF_GM( return new ShallowGradientGM(shader_sweep, "sweep_nodither", false); )
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