96fcdcc219
DOCS_PREVIEW= https://skia.org/?cl=1316233002 Review URL: https://codereview.chromium.org/1316233002
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
/*
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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 SkShader* (*MakeShaderProc)(const SkColor[], int count, const SkSize&);
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static 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::CreateLinear(pts, colors, nullptr, count,
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SkShader::kClamp_TileMode);
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}
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static 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::CreateRadial(center, size.width()/2, colors, nullptr, count,
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SkShader::kClamp_TileMode);
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}
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static 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::CreateTwoPointConical(center, size.width()/64,
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center, size.width()/2,
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colors, nullptr, count,
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SkShader::kClamp_TileMode);
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}
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static SkShader* shader_sweep(const SkColor colors[], int count, const SkSize& size) {
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return SkGradientShader::CreateSweep(size.width()/2, size.height()/2,
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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[]) : fProc(proc) {
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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[] = { sk_tool_utils::color_to_565(0xFF555555),
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sk_tool_utils::color_to_565(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))->unref();
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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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typedef skiagm::GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new ShallowGradientGM(shader_linear, "linear"); )
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DEF_GM( return new ShallowGradientGM(shader_radial, "radial"); )
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DEF_GM( return new ShallowGradientGM(shader_conical, "conical"); )
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DEF_GM( return new ShallowGradientGM(shader_sweep, "sweep"); )
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