88 lines
2.9 KiB
C++
88 lines
2.9 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/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypes.h"
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#include "include/effects/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, SkTileMode::kClamp);
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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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SkTileMode::kClamp);
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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, SkTileMode::kClamp);
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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), fName(name), fDither(dither) {}
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private:
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MakeShaderProc fProc;
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const char* fName;
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bool fDither;
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SkString onShortName() override {
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return SkStringPrintf("shallow_gradient_%s%s", fName, fDither ? "" : "_nodither");
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}
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SkISize onISize() override { return {800, 800}; }
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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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};
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///////////////////////////////////////////////////////////////////////////////
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#define M(PROC, DITHER) DEF_GM( return new ShallowGradientGM(shader_ ## PROC, #PROC, DITHER); )
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M(linear, true)
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M(radial, true)
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M(conical, true)
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M(sweep, true)
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M(linear, false)
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M(radial, false)
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M(conical, false)
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M(sweep, false)
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#undef M
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