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1109 lines
41 KiB
1109 lines
41 KiB
/*
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* Copyright 2011 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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namespace skiagm {
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struct GradData {
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int fCount;
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const SkColor* fColors;
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const SkColor4f* fColors4f;
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const SkScalar* fPos;
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};
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constexpr SkColor gColors[] = {
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SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK
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};
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constexpr SkColor4f gColors4f[] ={
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{ 1.0f, 0.0f, 0.0f, 1.0f }, // Red
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{ 0.0f, 1.0f, 0.0f, 1.0f }, // Green
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{ 0.0f, 0.0f, 1.0f, 1.0f }, // Blue
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{ 1.0f, 1.0f, 1.0f, 1.0f }, // White
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{ 0.0f, 0.0f, 0.0f, 1.0f } // Black
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};
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constexpr SkScalar gPos0[] = { 0, SK_Scalar1 };
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constexpr SkScalar gPos1[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
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constexpr SkScalar gPos2[] = {
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0, SK_Scalar1/8, SK_Scalar1/2, SK_Scalar1*7/8, SK_Scalar1
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};
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constexpr SkScalar gPosClamp[] = {0.0f, 0.0f, 1.0f, 1.0f};
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constexpr SkColor gColorClamp[] = {
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SK_ColorRED, SK_ColorGREEN, SK_ColorGREEN, SK_ColorBLUE
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};
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constexpr SkColor4f gColor4fClamp[] ={
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{ 1.0f, 0.0f, 0.0f, 1.0f }, // Red
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{ 0.0f, 1.0f, 0.0f, 1.0f }, // Green
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{ 0.0f, 1.0f, 0.0f, 1.0f }, // Green
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{ 0.0f, 0.0f, 1.0f, 1.0f } // Blue
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};
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constexpr GradData gGradData[] = {
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{ 2, gColors, gColors4f, nullptr },
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{ 2, gColors, gColors4f, gPos0 },
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{ 2, gColors, gColors4f, gPos1 },
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{ 5, gColors, gColors4f, nullptr },
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{ 5, gColors, gColors4f, gPos2 },
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{ 4, gColorClamp, gColor4fClamp, gPosClamp }
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};
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static sk_sp<SkShader> MakeLinear(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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return SkGradientShader::MakeLinear(pts, data.fColors, data.fPos, data.fCount, tm, 0,
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&localMatrix);
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}
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static sk_sp<SkShader> MakeLinear4f(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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auto srgb = SkColorSpace::MakeSRGBLinear();
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return SkGradientShader::MakeLinear(pts, data.fColors4f, srgb, data.fPos, data.fCount, tm, 0,
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&localMatrix);
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}
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static sk_sp<SkShader> MakeRadial(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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SkPoint center;
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center.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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return SkGradientShader::MakeRadial(center, center.fX, data.fColors, data.fPos, data.fCount,
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tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> MakeRadial4f(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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SkPoint center;
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center.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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auto srgb = SkColorSpace::MakeSRGBLinear();
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return SkGradientShader::MakeRadial(center, center.fX, data.fColors4f, srgb, data.fPos,
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data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> MakeSweep(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode, const SkMatrix& localMatrix) {
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SkPoint center;
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center.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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return SkGradientShader::MakeSweep(center.fX, center.fY, data.fColors, data.fPos, data.fCount,
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0, &localMatrix);
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}
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static sk_sp<SkShader> MakeSweep4f(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode, const SkMatrix& localMatrix) {
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SkPoint center;
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center.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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auto srgb = SkColorSpace::MakeSRGBLinear();
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return SkGradientShader::MakeSweep(center.fX, center.fY, data.fColors4f, srgb, data.fPos,
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data.fCount, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2Radial(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
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SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
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return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
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center0, (pts[1].fX - pts[0].fX) / 2,
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data.fColors, data.fPos, data.fCount, tm,
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0, &localMatrix);
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}
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static sk_sp<SkShader> Make2Radial4f(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3) / 5),
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SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1) / 4));
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auto srgb = SkColorSpace::MakeSRGBLinear();
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return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
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center0, (pts[1].fX - pts[0].fX) / 2,
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data.fColors4f, srgb, data.fPos, data.fCount, tm,
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0, &localMatrix);
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}
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static sk_sp<SkShader> Make2Conical(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = (pts[1].fX - pts[0].fX) / 10;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
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center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
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return SkGradientShader::MakeTwoPointConical(center1, radius1, center0, radius0,
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data.fColors, data.fPos,
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data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2Conical4f(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = (pts[1].fX - pts[0].fX) / 10;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
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center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
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auto srgb = SkColorSpace::MakeSRGBLinear();
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return SkGradientShader::MakeTwoPointConical(center1, radius1, center0, radius0,
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data.fColors4f, srgb, data.fPos,
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data.fCount, tm, 0, &localMatrix);
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}
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typedef sk_sp<SkShader> (*GradMaker)(const SkPoint pts[2], const GradData& data,
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SkShader::TileMode tm, const SkMatrix& localMatrix);
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constexpr GradMaker gGradMakers[] = {
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MakeLinear, MakeRadial, MakeSweep, Make2Radial, Make2Conical
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};
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constexpr GradMaker gGradMakers4f[] ={
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MakeLinear4f, MakeRadial4f, MakeSweep4f, Make2Radial4f, Make2Conical4f
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};
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///////////////////////////////////////////////////////////////////////////////
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class GradientsGM : public GM {
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public:
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GradientsGM(bool dither) : fDither(dither) {
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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SkString onShortName() {
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return SkString(fDither ? "gradients" : "gradients_nodither");
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}
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virtual SkISize onISize() { return SkISize::Make(840, 815); }
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virtual void onDraw(SkCanvas* canvas) {
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SkPoint pts[2] = {
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{ 0, 0 },
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{ SkIntToScalar(100), SkIntToScalar(100) }
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};
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SkShader::TileMode tm = SkShader::kClamp_TileMode;
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SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setDither(fDither);
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canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
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for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
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canvas->save();
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for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) {
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SkMatrix scale = SkMatrix::I();
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if (i == 5) { // if the clamp case
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scale.setScale(0.5f, 0.5f);
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scale.postTranslate(25.f, 25.f);
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}
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paint.setShader(gGradMakers[j](pts, gGradData[i], tm, scale));
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canvas->drawRect(r, paint);
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canvas->translate(0, SkIntToScalar(120));
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}
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canvas->restore();
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canvas->translate(SkIntToScalar(120), 0);
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}
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}
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protected:
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bool fDither;
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private:
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typedef GM INHERITED;
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};
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DEF_GM( return new GradientsGM(true); )
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DEF_GM( return new GradientsGM(false); )
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// Like the original gradients GM, but using the SkColor4f shader factories. Should be identical.
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class Gradients4fGM : public GM {
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public:
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Gradients4fGM(bool dither) : fDither(dither) {
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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SkString onShortName() {
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return SkString(fDither ? "gradients4f" : "gradients4f_nodither");
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}
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virtual SkISize onISize() { return SkISize::Make(840, 815); }
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virtual void onDraw(SkCanvas* canvas) {
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SkPoint pts[2] ={
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{ 0, 0 },
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{ SkIntToScalar(100), SkIntToScalar(100) }
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};
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SkShader::TileMode tm = SkShader::kClamp_TileMode;
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SkRect r ={ 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setDither(fDither);
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canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
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for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
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canvas->save();
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for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers4f); j++) {
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SkMatrix scale = SkMatrix::I();
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if (i == 5) { // if the clamp case
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scale.setScale(0.5f, 0.5f);
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scale.postTranslate(25.f, 25.f);
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}
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paint.setShader(gGradMakers4f[j](pts, gGradData[i], tm, scale));
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canvas->drawRect(r, paint);
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canvas->translate(0, SkIntToScalar(120));
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}
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canvas->restore();
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canvas->translate(SkIntToScalar(120), 0);
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}
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}
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protected:
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bool fDither;
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private:
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typedef GM INHERITED;
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};
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DEF_GM(return new Gradients4fGM(true); )
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DEF_GM(return new Gradients4fGM(false); )
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// Based on the original gradient slide, but with perspective applied to the
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// gradient shaders' local matrices
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class GradientsLocalPerspectiveGM : public GM {
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public:
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GradientsLocalPerspectiveGM(bool dither) : fDither(dither) {
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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SkString onShortName() {
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return SkString(fDither ? "gradients_local_perspective" :
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"gradients_local_perspective_nodither");
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}
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virtual SkISize onISize() { return SkISize::Make(840, 815); }
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virtual void onDraw(SkCanvas* canvas) {
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SkPoint pts[2] = {
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{ 0, 0 },
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{ SkIntToScalar(100), SkIntToScalar(100) }
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};
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SkShader::TileMode tm = SkShader::kClamp_TileMode;
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SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setDither(fDither);
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canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
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for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
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canvas->save();
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for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) {
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// apply an increasing y perspective as we move to the right
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SkMatrix perspective;
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perspective.setIdentity();
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perspective.setPerspY(SkIntToScalar(i+1) / 500);
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perspective.setSkewX(SkIntToScalar(i+1) / 10);
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paint.setShader(gGradMakers[j](pts, gGradData[i], tm, perspective));
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canvas->drawRect(r, paint);
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canvas->translate(0, SkIntToScalar(120));
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}
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canvas->restore();
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canvas->translate(SkIntToScalar(120), 0);
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}
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}
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private:
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bool fDither;
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typedef GM INHERITED;
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};
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DEF_GM( return new GradientsLocalPerspectiveGM(true); )
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DEF_GM( return new GradientsLocalPerspectiveGM(false); )
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// Based on the original gradient slide, but with perspective applied to
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// the view matrix
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class GradientsViewPerspectiveGM : public GradientsGM {
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public:
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GradientsViewPerspectiveGM(bool dither) : INHERITED(dither) { }
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protected:
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SkString onShortName() {
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return SkString(fDither ? "gradients_view_perspective" :
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"gradients_view_perspective_nodither");
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}
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virtual SkISize onISize() { return SkISize::Make(840, 500); }
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virtual void onDraw(SkCanvas* canvas) {
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SkMatrix perspective;
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perspective.setIdentity();
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perspective.setPerspY(0.001f);
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perspective.setSkewX(SkIntToScalar(8) / 25);
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canvas->concat(perspective);
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INHERITED::onDraw(canvas);
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}
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private:
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typedef GradientsGM INHERITED;
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};
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DEF_GM( return new GradientsViewPerspectiveGM(true); )
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DEF_GM( return new GradientsViewPerspectiveGM(false); )
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/*
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Inspired by this <canvas> javascript, where we need to detect that we are not
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solving a quadratic equation, but must instead solve a linear (since our X^2
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coefficient is 0)
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ctx.fillStyle = '#f00';
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ctx.fillRect(0, 0, 100, 50);
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var g = ctx.createRadialGradient(-80, 25, 70, 0, 25, 150);
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g.addColorStop(0, '#f00');
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g.addColorStop(0.01, '#0f0');
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g.addColorStop(0.99, '#0f0');
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g.addColorStop(1, '#f00');
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ctx.fillStyle = g;
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ctx.fillRect(0, 0, 100, 50);
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*/
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class GradientsDegenrate2PointGM : public GM {
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public:
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GradientsDegenrate2PointGM(bool dither) : fDither(dither) {}
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protected:
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SkString onShortName() {
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return SkString(fDither ? "gradients_degenerate_2pt" : "gradients_degenerate_2pt_nodither");
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}
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virtual SkISize onISize() { return SkISize::Make(320, 320); }
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorBLUE);
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorGREEN, SK_ColorRED };
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SkScalar pos[] = { 0, 0.01f, 0.99f, SK_Scalar1 };
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SkPoint c0;
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c0.iset(-80, 25);
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SkScalar r0 = SkIntToScalar(70);
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SkPoint c1;
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c1.iset(0, 25);
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SkScalar r1 = SkIntToScalar(150);
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeTwoPointConical(c0, r0, c1, r1, colors,
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pos, SK_ARRAY_COUNT(pos),
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SkShader::kClamp_TileMode));
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paint.setDither(fDither);
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canvas->drawPaint(paint);
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}
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private:
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bool fDither;
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typedef GM INHERITED;
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};
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DEF_GM( return new GradientsDegenrate2PointGM(true); )
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DEF_GM( return new GradientsDegenrate2PointGM(false); )
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/* bug.skia.org/517
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<canvas id="canvas"></canvas>
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<script>
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var c = document.getElementById("canvas");
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var ctx = c.getContext("2d");
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ctx.fillStyle = '#ff0';
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ctx.fillRect(0, 0, 100, 50);
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var g = ctx.createRadialGradient(200, 25, 20, 200, 25, 10);
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g.addColorStop(0, '#0f0');
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g.addColorStop(0.003, '#f00'); // 0.004 makes this work
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g.addColorStop(1, '#ff0');
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ctx.fillStyle = g;
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ctx.fillRect(0, 0, 100, 50);
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</script>
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*/
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// should draw only green
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DEF_SIMPLE_GM(small_color_stop, canvas, 100, 150) {
|
|
SkColor colors[] = { SK_ColorGREEN, SK_ColorRED, SK_ColorYELLOW };
|
|
SkScalar pos[] = { 0, 0.003f, SK_Scalar1 }; // 0.004f makes this work
|
|
SkPoint c0 = { 200, 25 };
|
|
SkScalar r0 = 20;
|
|
SkPoint c1 = { 200, 25 };
|
|
SkScalar r1 = 10;
|
|
|
|
SkPaint paint;
|
|
paint.setColor(SK_ColorYELLOW);
|
|
canvas->drawRect(SkRect::MakeWH(100, 150), paint);
|
|
paint.setShader(SkGradientShader::MakeTwoPointConical(c0, r0, c1, r1, colors, pos,
|
|
SK_ARRAY_COUNT(pos),
|
|
SkShader::kClamp_TileMode));
|
|
canvas->drawRect(SkRect::MakeWH(100, 150), paint);
|
|
}
|
|
|
|
|
|
/// Tests correctness of *optimized* codepaths in gradients.
|
|
|
|
class ClampedGradientsGM : public GM {
|
|
public:
|
|
ClampedGradientsGM(bool dither) : fDither(dither) {}
|
|
|
|
protected:
|
|
SkString onShortName() {
|
|
return SkString(fDither ? "clamped_gradients" : "clamped_gradients_nodither");
|
|
}
|
|
|
|
virtual SkISize onISize() { return SkISize::Make(640, 510); }
|
|
|
|
void drawBG(SkCanvas* canvas) {
|
|
canvas->drawColor(0xFFDDDDDD);
|
|
}
|
|
|
|
virtual void onDraw(SkCanvas* canvas) {
|
|
this->drawBG(canvas);
|
|
|
|
SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(300) };
|
|
SkPaint paint;
|
|
paint.setDither(fDither);
|
|
paint.setAntiAlias(true);
|
|
|
|
SkPoint center;
|
|
center.iset(0, 300);
|
|
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
|
|
paint.setShader(SkGradientShader::MakeRadial(
|
|
SkPoint(center),
|
|
SkIntToScalar(200), gColors, nullptr, 5,
|
|
SkShader::kClamp_TileMode));
|
|
canvas->drawRect(r, paint);
|
|
}
|
|
|
|
private:
|
|
bool fDither;
|
|
|
|
typedef GM INHERITED;
|
|
};
|
|
DEF_GM( return new ClampedGradientsGM(true); )
|
|
DEF_GM( return new ClampedGradientsGM(false); )
|
|
|
|
/// Checks quality of large radial gradients, which may display
|
|
/// some banding.
|
|
|
|
class RadialGradientGM : public GM {
|
|
public:
|
|
RadialGradientGM() {}
|
|
|
|
protected:
|
|
|
|
SkString onShortName() override { return SkString("radial_gradient"); }
|
|
SkISize onISize() override { return SkISize::Make(1280, 1280); }
|
|
void drawBG(SkCanvas* canvas) {
|
|
canvas->drawColor(0xFF000000);
|
|
}
|
|
void onDraw(SkCanvas* canvas) override {
|
|
const SkISize dim = this->getISize();
|
|
|
|
this->drawBG(canvas);
|
|
|
|
SkPaint paint;
|
|
paint.setDither(true);
|
|
SkPoint center;
|
|
center.set(SkIntToScalar(dim.width())/2, SkIntToScalar(dim.height())/2);
|
|
SkScalar radius = SkIntToScalar(dim.width())/2;
|
|
const SkColor colors[] = { 0x7f7f7f7f, 0x7f7f7f7f, 0xb2000000 };
|
|
const SkScalar pos[] = { 0.0f,
|
|
0.35f,
|
|
1.0f };
|
|
paint.setShader(SkGradientShader::MakeRadial(center, radius, colors, pos,
|
|
SK_ARRAY_COUNT(pos),
|
|
SkShader::kClamp_TileMode));
|
|
SkRect r = {
|
|
0, 0, SkIntToScalar(dim.width()), SkIntToScalar(dim.height())
|
|
};
|
|
canvas->drawRect(r, paint);
|
|
}
|
|
private:
|
|
typedef GM INHERITED;
|
|
};
|
|
DEF_GM( return new RadialGradientGM; )
|
|
|
|
class RadialGradient2GM : public GM {
|
|
public:
|
|
RadialGradient2GM(bool dither) : fDither(dither) {}
|
|
|
|
protected:
|
|
|
|
SkString onShortName() override {
|
|
return SkString(fDither ? "radial_gradient2" : "radial_gradient2_nodither");
|
|
}
|
|
|
|
SkISize onISize() override { return SkISize::Make(800, 400); }
|
|
void drawBG(SkCanvas* canvas) {
|
|
canvas->drawColor(0xFF000000);
|
|
}
|
|
|
|
// Reproduces the example given in bug 7671058.
|
|
void onDraw(SkCanvas* canvas) override {
|
|
SkPaint paint1, paint2, paint3;
|
|
paint1.setStyle(SkPaint::kFill_Style);
|
|
paint2.setStyle(SkPaint::kFill_Style);
|
|
paint3.setStyle(SkPaint::kFill_Style);
|
|
|
|
const SkColor sweep_colors[] =
|
|
{ 0xFFFF0000, 0xFFFFFF00, 0xFF00FF00, 0xFF00FFFF, 0xFF0000FF, 0xFFFF00FF, 0xFFFF0000 };
|
|
const SkColor colors1[] = { 0xFFFFFFFF, 0x00000000 };
|
|
const SkColor colors2[] = { 0xFF000000, 0x00000000 };
|
|
|
|
const SkScalar cx = 200, cy = 200, radius = 150;
|
|
SkPoint center;
|
|
center.set(cx, cy);
|
|
|
|
// We can either interpolate endpoints and premultiply each point (default, more precision),
|
|
// or premultiply the endpoints first, avoiding the need to premultiply each point (cheap).
|
|
const uint32_t flags[] = { 0, SkGradientShader::kInterpolateColorsInPremul_Flag };
|
|
|
|
for (size_t i = 0; i < SK_ARRAY_COUNT(flags); i++) {
|
|
paint1.setShader(SkGradientShader::MakeSweep(cx, cy, sweep_colors,
|
|
nullptr, SK_ARRAY_COUNT(sweep_colors),
|
|
flags[i], nullptr));
|
|
paint2.setShader(SkGradientShader::MakeRadial(center, radius, colors1,
|
|
nullptr, SK_ARRAY_COUNT(colors1),
|
|
SkShader::kClamp_TileMode,
|
|
flags[i], nullptr));
|
|
paint3.setShader(SkGradientShader::MakeRadial(center, radius, colors2,
|
|
nullptr, SK_ARRAY_COUNT(colors2),
|
|
SkShader::kClamp_TileMode,
|
|
flags[i], nullptr));
|
|
paint1.setDither(fDither);
|
|
paint2.setDither(fDither);
|
|
paint3.setDither(fDither);
|
|
|
|
canvas->drawCircle(cx, cy, radius, paint1);
|
|
canvas->drawCircle(cx, cy, radius, paint3);
|
|
canvas->drawCircle(cx, cy, radius, paint2);
|
|
|
|
canvas->translate(400, 0);
|
|
}
|
|
}
|
|
|
|
private:
|
|
bool fDither;
|
|
|
|
typedef GM INHERITED;
|
|
};
|
|
DEF_GM( return new RadialGradient2GM(true); )
|
|
DEF_GM( return new RadialGradient2GM(false); )
|
|
|
|
// Shallow radial (shows banding on raster)
|
|
class RadialGradient3GM : public GM {
|
|
public:
|
|
RadialGradient3GM(bool dither) : fDither(dither) { }
|
|
|
|
protected:
|
|
SkString onShortName() override {
|
|
return SkString(fDither ? "radial_gradient3" : "radial_gradient3_nodither");
|
|
}
|
|
|
|
SkISize onISize() override { return SkISize::Make(500, 500); }
|
|
|
|
bool runAsBench() const override { return true; }
|
|
|
|
void onOnceBeforeDraw() override {
|
|
const SkPoint center = { 0, 0 };
|
|
const SkScalar kRadius = 3000;
|
|
const SkColor gColors[] = { 0xFFFFFFFF, 0xFF000000 };
|
|
fShader = SkGradientShader::MakeRadial(center, kRadius, gColors, nullptr, 2,
|
|
SkShader::kClamp_TileMode);
|
|
}
|
|
|
|
void onDraw(SkCanvas* canvas) override {
|
|
SkPaint paint;
|
|
paint.setShader(fShader);
|
|
paint.setDither(fDither);
|
|
canvas->drawRect(SkRect::MakeWH(500, 500), paint);
|
|
}
|
|
|
|
private:
|
|
sk_sp<SkShader> fShader;
|
|
bool fDither;
|
|
|
|
typedef GM INHERITED;
|
|
};
|
|
DEF_GM( return new RadialGradient3GM(true); )
|
|
DEF_GM( return new RadialGradient3GM(false); )
|
|
|
|
class RadialGradient4GM : public GM {
|
|
public:
|
|
RadialGradient4GM(bool dither) : fDither(dither) { }
|
|
|
|
protected:
|
|
SkString onShortName() override {
|
|
return SkString(fDither ? "radial_gradient4" : "radial_gradient4_nodither");
|
|
}
|
|
|
|
SkISize onISize() override { return SkISize::Make(500, 500); }
|
|
|
|
void onOnceBeforeDraw() override {
|
|
const SkPoint center = { 250, 250 };
|
|
const SkScalar kRadius = 250;
|
|
const SkColor colors[] = { SK_ColorRED, SK_ColorRED, SK_ColorWHITE, SK_ColorWHITE,
|
|
SK_ColorRED };
|
|
const SkScalar pos[] = { 0, .4f, .4f, .8f, .8f, 1 };
|
|
fShader = SkGradientShader::MakeRadial(center, kRadius, colors, pos,
|
|
SK_ARRAY_COUNT(gColors), SkShader::kClamp_TileMode);
|
|
}
|
|
|
|
void onDraw(SkCanvas* canvas) override {
|
|
SkPaint paint;
|
|
paint.setAntiAlias(true);
|
|
paint.setDither(fDither);
|
|
paint.setShader(fShader);
|
|
canvas->drawRect(SkRect::MakeWH(500, 500), paint);
|
|
}
|
|
|
|
private:
|
|
sk_sp<SkShader> fShader;
|
|
bool fDither;
|
|
|
|
typedef GM INHERITED;
|
|
};
|
|
DEF_GM( return new RadialGradient4GM(true); )
|
|
DEF_GM( return new RadialGradient4GM(false); )
|
|
|
|
class LinearGradientGM : public GM {
|
|
public:
|
|
LinearGradientGM(bool dither) : fDither(dither) { }
|
|
|
|
protected:
|
|
SkString onShortName() override {
|
|
return SkString(fDither ? "linear_gradient" : "linear_gradient_nodither");
|
|
}
|
|
|
|
const SkScalar kWidthBump = 30.f;
|
|
const SkScalar kHeight = 5.f;
|
|
const SkScalar kMinWidth = 540.f;
|
|
|
|
SkISize onISize() override { return SkISize::Make(500, 500); }
|
|
|
|
void onOnceBeforeDraw() override {
|
|
SkPoint pts[2] = { {0, 0}, {0, 0} };
|
|
const SkColor colors[] = { SK_ColorWHITE, SK_ColorWHITE, 0xFF008200, 0xFF008200,
|
|
SK_ColorWHITE, SK_ColorWHITE };
|
|
const SkScalar unitPos[] = { 0, 50, 70, 500, 540 };
|
|
SkScalar pos[6];
|
|
pos[5] = 1;
|
|
for (int index = 0; index < (int) SK_ARRAY_COUNT(fShader); ++index) {
|
|
pts[1].fX = 500.f + index * kWidthBump;
|
|
for (int inner = 0; inner < (int) SK_ARRAY_COUNT(unitPos); ++inner) {
|
|
pos[inner] = unitPos[inner] / (kMinWidth + index * kWidthBump);
|
|
}
|
|
fShader[index] = SkGradientShader::MakeLinear(pts, colors, pos,
|
|
SK_ARRAY_COUNT(gColors), SkShader::kClamp_TileMode);
|
|
}
|
|
}
|
|
|
|
void onDraw(SkCanvas* canvas) override {
|
|
SkPaint paint;
|
|
paint.setAntiAlias(true);
|
|
paint.setDither(fDither);
|
|
for (int index = 0; index < (int) SK_ARRAY_COUNT(fShader); ++index) {
|
|
paint.setShader(fShader[index]);
|
|
canvas->drawRect(SkRect::MakeLTRB(0, index * kHeight, kMinWidth + index * kWidthBump,
|
|
(index + 1) * kHeight), paint);
|
|
}
|
|
}
|
|
|
|
private:
|
|
sk_sp<SkShader> fShader[100];
|
|
bool fDither;
|
|
|
|
typedef GM INHERITED;
|
|
};
|
|
DEF_GM( return new LinearGradientGM(true); )
|
|
DEF_GM( return new LinearGradientGM(false); )
|
|
|
|
class LinearGradientTinyGM : public GM {
|
|
public:
|
|
LinearGradientTinyGM(uint32_t flags, const char* suffix = nullptr)
|
|
: fName("linear_gradient_tiny")
|
|
, fFlags(flags) {
|
|
fName.append(suffix);
|
|
}
|
|
|
|
protected:
|
|
SkString onShortName() override {
|
|
return fName;
|
|
}
|
|
|
|
SkISize onISize() override {
|
|
return SkISize::Make(600, 500);
|
|
}
|
|
|
|
void onDraw(SkCanvas* canvas) override {
|
|
const SkScalar kRectSize = 100;
|
|
const unsigned kStopCount = 3;
|
|
const SkColor colors[kStopCount] = { SK_ColorGREEN, SK_ColorRED, SK_ColorGREEN };
|
|
const struct {
|
|
SkPoint pts[2];
|
|
SkScalar pos[kStopCount];
|
|
} configs[] = {
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(10, 0) }, { 0, 0.999999f, 1 }},
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(10, 0) }, { 0, 0.000001f, 1 }},
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(10, 0) }, { 0, 0.999999999f, 1 }},
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(10, 0) }, { 0, 0.000000001f, 1 }},
|
|
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(0, 10) }, { 0, 0.999999f, 1 }},
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(0, 10) }, { 0, 0.000001f, 1 }},
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(0, 10) }, { 0, 0.999999999f, 1 }},
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(0, 10) }, { 0, 0.000000001f, 1 }},
|
|
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(0.00001f, 0) }, { 0, 0.5f, 1 }},
|
|
{ { SkPoint::Make(9.99999f, 0), SkPoint::Make(10, 0) }, { 0, 0.5f, 1 }},
|
|
{ { SkPoint::Make(0, 0), SkPoint::Make(0, 0.00001f) }, { 0, 0.5f, 1 }},
|
|
{ { SkPoint::Make(0, 9.99999f), SkPoint::Make(0, 10) }, { 0, 0.5f, 1 }},
|
|
};
|
|
|
|
SkPaint paint;
|
|
for (unsigned i = 0; i < SK_ARRAY_COUNT(configs); ++i) {
|
|
SkAutoCanvasRestore acr(canvas, true);
|
|
paint.setShader(SkGradientShader::MakeLinear(configs[i].pts, colors, configs[i].pos,
|
|
kStopCount, SkShader::kClamp_TileMode,
|
|
fFlags, nullptr));
|
|
canvas->translate(kRectSize * ((i % 4) * 1.5f + 0.25f),
|
|
kRectSize * ((i / 4) * 1.5f + 0.25f));
|
|
|
|
canvas->drawRect(SkRect::MakeWH(kRectSize, kRectSize), paint);
|
|
}
|
|
}
|
|
|
|
private:
|
|
typedef GM INHERITED;
|
|
|
|
SkString fName;
|
|
uint32_t fFlags;
|
|
};
|
|
DEF_GM( return new LinearGradientTinyGM(0); )
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
struct GradRun {
|
|
SkColor fColors[4];
|
|
SkScalar fPos[4];
|
|
int fCount;
|
|
};
|
|
|
|
#define SIZE 121
|
|
|
|
static sk_sp<SkShader> make_linear(const GradRun& run, SkShader::TileMode mode) {
|
|
const SkPoint pts[] { { 30, 30 }, { SIZE - 30, SIZE - 30 } };
|
|
return SkGradientShader::MakeLinear(pts, run.fColors, run.fPos, run.fCount, mode);
|
|
}
|
|
|
|
static sk_sp<SkShader> make_radial(const GradRun& run, SkShader::TileMode mode) {
|
|
const SkScalar half = SIZE * 0.5f;
|
|
return SkGradientShader::MakeRadial({half,half}, half - 10, run.fColors, run.fPos,
|
|
run.fCount, mode);
|
|
}
|
|
|
|
static sk_sp<SkShader> make_conical(const GradRun& run, SkShader::TileMode mode) {
|
|
const SkScalar half = SIZE * 0.5f;
|
|
const SkPoint center { half, half };
|
|
return SkGradientShader::MakeTwoPointConical(center, 20, center, half - 10,
|
|
run.fColors, run.fPos, run.fCount, mode);
|
|
}
|
|
|
|
static sk_sp<SkShader> make_sweep(const GradRun& run, SkShader::TileMode) {
|
|
const SkScalar half = SIZE * 0.5f;
|
|
return SkGradientShader::MakeSweep(half, half, run.fColors, run.fPos, run.fCount);
|
|
}
|
|
|
|
/*
|
|
* Exercise duplicate color-stops, at the ends, and in the middle
|
|
*
|
|
* At the time of this writing, only Linear correctly deals with duplicates at the ends,
|
|
* and then only correctly on CPU backend.
|
|
*/
|
|
DEF_SIMPLE_GM(gradients_dup_color_stops, canvas, 704, 564) {
|
|
const SkColor preColor = 0xFFFF0000; // clamp color before start
|
|
const SkColor postColor = 0xFF0000FF; // clamp color after end
|
|
const SkColor color0 = 0xFF000000;
|
|
const SkColor color1 = 0xFF00FF00;
|
|
const SkColor badColor = 0xFF3388BB; // should never be seen, fills out fixed-size array
|
|
|
|
const GradRun runs[] = {
|
|
{ { color0, color1, badColor, badColor },
|
|
{ 0, 1, -1, -1 },
|
|
2,
|
|
},
|
|
{ { preColor, color0, color1, badColor },
|
|
{ 0, 0, 1, -1 },
|
|
3,
|
|
},
|
|
{ { color0, color1, postColor, badColor },
|
|
{ 0, 1, 1, -1 },
|
|
3,
|
|
},
|
|
{ { preColor, color0, color1, postColor },
|
|
{ 0, 0, 1, 1 },
|
|
4,
|
|
},
|
|
{ { color0, color0, color1, color1 },
|
|
{ 0, 0.5f, 0.5f, 1 },
|
|
4,
|
|
},
|
|
};
|
|
sk_sp<SkShader> (*factories[])(const GradRun&, SkShader::TileMode) {
|
|
make_linear, make_radial, make_conical, make_sweep
|
|
};
|
|
|
|
const SkRect rect = SkRect::MakeWH(SIZE, SIZE);
|
|
const SkScalar dx = SIZE + 20;
|
|
const SkScalar dy = SIZE + 20;
|
|
const SkShader::TileMode mode = SkShader::kClamp_TileMode;
|
|
|
|
SkPaint paint;
|
|
canvas->translate(10, 10 - dy);
|
|
for (auto factory : factories) {
|
|
canvas->translate(0, dy);
|
|
SkAutoCanvasRestore acr(canvas, true);
|
|
for (const auto& run : runs) {
|
|
paint.setShader(factory(run, mode));
|
|
canvas->drawRect(rect, paint);
|
|
canvas->translate(dx, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void draw_many_stops(SkCanvas* canvas) {
|
|
const unsigned kStopCount = 200;
|
|
const SkPoint pts[] = { {50, 50}, {450, 465}};
|
|
|
|
SkColor colors[kStopCount];
|
|
for (unsigned i = 0; i < kStopCount; i++) {
|
|
switch (i % 5) {
|
|
case 0: colors[i] = SK_ColorRED; break;
|
|
case 1: colors[i] = SK_ColorGREEN; break;
|
|
case 2: colors[i] = SK_ColorGREEN; break;
|
|
case 3: colors[i] = SK_ColorBLUE; break;
|
|
case 4: colors[i] = SK_ColorRED; break;
|
|
}
|
|
}
|
|
|
|
SkPaint p;
|
|
p.setShader(SkGradientShader::MakeLinear(
|
|
pts, colors, nullptr, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
|
|
|
|
canvas->drawRect(SkRect::MakeXYWH(0, 0, 500, 500), p);
|
|
}
|
|
|
|
DEF_SIMPLE_GM(gradient_many_stops, canvas, 500, 500) {
|
|
draw_many_stops(canvas);
|
|
}
|
|
|
|
#include "SkPictureRecorder.h"
|
|
|
|
static void draw_circle_shader(SkCanvas* canvas, SkScalar cx, SkScalar cy, SkScalar r,
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sk_sp<SkShader> (*shaderFunc)()) {
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SkPaint p;
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p.setAntiAlias(true);
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p.setShader(shaderFunc());
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canvas->drawCircle(cx, cy, r, p);
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p.setShader(nullptr);
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p.setColor(SK_ColorGRAY);
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(2);
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canvas->drawCircle(cx, cy, r, p);
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}
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DEF_SIMPLE_GM(fancy_gradients, canvas, 800, 300) {
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draw_circle_shader(canvas, 150, 150, 100, []() -> sk_sp<SkShader> {
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// Checkerboard using two linear gradients + picture shader.
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SkScalar kTileSize = 80 / sqrtf(2);
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SkColor colors1[] = { 0xff000000, 0xff000000,
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0xffffffff, 0xffffffff,
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0xff000000, 0xff000000 };
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SkColor colors2[] = { 0xff000000, 0xff000000,
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0x00000000, 0x00000000,
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0xff000000, 0xff000000 };
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SkScalar pos[] = { 0, .25f, .25f, .75f, .75f, 1 };
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static_assert(SK_ARRAY_COUNT(colors1) == SK_ARRAY_COUNT(pos), "color/pos size mismatch");
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static_assert(SK_ARRAY_COUNT(colors2) == SK_ARRAY_COUNT(pos), "color/pos size mismatch");
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|
|
|
SkPictureRecorder recorder;
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|
recorder.beginRecording(SkRect::MakeWH(kTileSize, kTileSize));
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|
|
|
SkPaint p;
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|
|
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SkPoint pts1[] = { { 0, 0 }, { kTileSize, kTileSize }};
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p.setShader(SkGradientShader::MakeLinear(pts1, colors1, pos, SK_ARRAY_COUNT(colors1),
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|
SkShader::kClamp_TileMode, 0, nullptr));
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|
recorder.getRecordingCanvas()->drawPaint(p);
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|
|
|
SkPoint pts2[] = { { 0, kTileSize }, { kTileSize, 0 }};
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p.setShader(SkGradientShader::MakeLinear(pts2, colors2, pos, SK_ARRAY_COUNT(colors2),
|
|
SkShader::kClamp_TileMode, 0, nullptr));
|
|
recorder.getRecordingCanvas()->drawPaint(p);
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|
|
|
SkMatrix m = SkMatrix::I();
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|
m.preRotate(45);
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|
return SkShader::MakePictureShader(recorder.finishRecordingAsPicture(),
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|
SkShader::kRepeat_TileMode,
|
|
SkShader::kRepeat_TileMode, &m, nullptr);
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|
});
|
|
|
|
draw_circle_shader(canvas, 400, 150, 100, []() -> sk_sp<SkShader> {
|
|
// Checkerboard using a sweep gradient + picture shader.
|
|
SkScalar kTileSize = 80;
|
|
SkColor colors[] = { 0xff000000, 0xff000000,
|
|
0xffffffff, 0xffffffff,
|
|
0xff000000, 0xff000000,
|
|
0xffffffff, 0xffffffff };
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|
SkScalar pos[] = { 0, .25f, .25f, .5f, .5f, .75f, .75f, 1 };
|
|
static_assert(SK_ARRAY_COUNT(colors) == SK_ARRAY_COUNT(pos), "color/pos size mismatch");
|
|
|
|
SkPaint p;
|
|
p.setShader(SkGradientShader::MakeSweep(kTileSize / 2, kTileSize / 2,
|
|
colors, pos, SK_ARRAY_COUNT(colors), 0, nullptr));
|
|
SkPictureRecorder recorder;
|
|
recorder.beginRecording(SkRect::MakeWH(kTileSize, kTileSize))->drawPaint(p);
|
|
|
|
return SkShader::MakePictureShader(recorder.finishRecordingAsPicture(),
|
|
SkShader::kRepeat_TileMode,
|
|
SkShader::kRepeat_TileMode, nullptr, nullptr);
|
|
});
|
|
|
|
draw_circle_shader(canvas, 650, 150, 100, []() -> sk_sp<SkShader> {
|
|
// Dartboard using sweep + radial.
|
|
const SkColor a = 0xffffffff;
|
|
const SkColor b = 0xff000000;
|
|
SkColor colors[] = { a, a, b, b, a, a, b, b, a, a, b, b, a, a, b, b};
|
|
SkScalar pos[] = { 0, .125f, .125f, .25f, .25f, .375f, .375f, .5f, .5f,
|
|
.625f, .625f, .75f, .75f, .875f, .875f, 1};
|
|
static_assert(SK_ARRAY_COUNT(colors) == SK_ARRAY_COUNT(pos), "color/pos size mismatch");
|
|
|
|
SkPoint center = { 650, 150 };
|
|
sk_sp<SkShader> sweep1 = SkGradientShader::MakeSweep(center.x(), center.y(), colors, pos,
|
|
SK_ARRAY_COUNT(colors), 0, nullptr);
|
|
SkMatrix m = SkMatrix::I();
|
|
m.preRotate(22.5f, center.x(), center.y());
|
|
sk_sp<SkShader> sweep2 = SkGradientShader::MakeSweep(center.x(), center.y(), colors, pos,
|
|
SK_ARRAY_COUNT(colors), 0, &m);
|
|
|
|
sk_sp<SkShader> sweep(SkShader::MakeComposeShader(sweep1, sweep2, SkBlendMode::kExclusion));
|
|
|
|
SkScalar radialPos[] = { 0, .02f, .02f, .04f, .04f, .08f, .08f, .16f, .16f, .31f, .31f,
|
|
.62f, .62f, 1, 1, 1 };
|
|
static_assert(SK_ARRAY_COUNT(colors) == SK_ARRAY_COUNT(radialPos),
|
|
"color/pos size mismatch");
|
|
|
|
return SkShader::MakeComposeShader(sweep,
|
|
SkGradientShader::MakeRadial(center, 100, colors,
|
|
radialPos,
|
|
SK_ARRAY_COUNT(radialPos),
|
|
SkShader::kClamp_TileMode),
|
|
SkBlendMode::kExclusion);
|
|
});
|
|
}
|
|
|
|
DEF_SIMPLE_GM(sweep_tiling, canvas, 690, 512) {
|
|
static constexpr SkScalar size = 160;
|
|
static constexpr SkColor colors[] = { SK_ColorBLUE, SK_ColorYELLOW, SK_ColorGREEN };
|
|
static constexpr SkScalar pos[] = { 0, .25f, .50f };
|
|
static_assert(SK_ARRAY_COUNT(colors) == SK_ARRAY_COUNT(pos), "size mismatch");
|
|
|
|
static constexpr SkShader::TileMode modes[] = { SkShader::kClamp_TileMode,
|
|
SkShader::kRepeat_TileMode,
|
|
SkShader::kMirror_TileMode };
|
|
|
|
static const struct {
|
|
SkScalar start, end;
|
|
} angles[] = {
|
|
{ -330, -270 },
|
|
{ 30, 90 },
|
|
{ 390, 450 },
|
|
{ -30, 800 },
|
|
};
|
|
|
|
SkPaint p;
|
|
const SkRect r = SkRect::MakeWH(size, size);
|
|
|
|
for (auto mode : modes) {
|
|
{
|
|
SkAutoCanvasRestore acr(canvas, true);
|
|
|
|
for (auto angle : angles) {
|
|
p.setShader(SkGradientShader::MakeSweep(size / 2, size / 2, colors, pos,
|
|
SK_ARRAY_COUNT(colors), mode,
|
|
angle.start, angle.end, 0, nullptr));
|
|
|
|
canvas->drawRect(r, p);
|
|
canvas->translate(size * 1.1f, 0);
|
|
}
|
|
}
|
|
canvas->translate(0, size * 1.1f);
|
|
}
|
|
}
|
|
|
|
// Exercises the special-case Ganesh gradient effects.
|
|
DEF_SIMPLE_GM(gradients_interesting, canvas, 640, 1300) {
|
|
static const SkColor colors2[] = { SK_ColorRED, SK_ColorBLUE };
|
|
static const SkColor colors3[] = { SK_ColorRED, SK_ColorYELLOW, SK_ColorBLUE };
|
|
static const SkColor colors4[] = { SK_ColorRED, SK_ColorYELLOW, SK_ColorYELLOW, SK_ColorBLUE };
|
|
|
|
static const SkScalar softRight[] = { 0, .999f, 1 }; // Based on Android launcher "clipping"
|
|
static const SkScalar hardLeft[] = { 0, 0, 1 };
|
|
static const SkScalar hardRight[] = { 0, 1, 1 };
|
|
static const SkScalar hardCenter[] = { 0, .5f, .5f, 1 };
|
|
|
|
static const struct {
|
|
const SkColor* colors;
|
|
const SkScalar* pos;
|
|
int count;
|
|
} configs[] = {
|
|
{ colors2, nullptr, 2 }, // kTwo_ColorType
|
|
{ colors3, nullptr, 3 }, // kThree_ColorType (simple)
|
|
{ colors3, softRight, 3 }, // kThree_ColorType (tricky)
|
|
{ colors3, hardLeft, 3 }, // kHardStopLeftEdged_ColorType
|
|
{ colors3, hardRight, 3 }, // kHardStopRightEdged_ColorType
|
|
{ colors4, hardCenter, 4 }, // kSingleHardStop_ColorType
|
|
};
|
|
|
|
static const SkShader::TileMode modes[] = {
|
|
SkShader::kClamp_TileMode,
|
|
SkShader::kRepeat_TileMode,
|
|
SkShader::kMirror_TileMode,
|
|
};
|
|
|
|
static constexpr SkScalar size = 200;
|
|
static const SkPoint pts[] = { { size / 3, size / 3 }, { size * 2 / 3, size * 2 / 3} };
|
|
|
|
SkPaint p;
|
|
for (const auto& cfg : configs) {
|
|
{
|
|
SkAutoCanvasRestore acr(canvas, true);
|
|
for (auto mode : modes) {
|
|
p.setShader(SkGradientShader::MakeLinear(pts, cfg.colors, cfg.pos, cfg.count,
|
|
mode));
|
|
canvas->drawRect(SkRect::MakeWH(size, size), p);
|
|
canvas->translate(size * 1.1f, 0);
|
|
}
|
|
}
|
|
canvas->translate(0, size * 1.1f);
|
|
}
|
|
}
|