411 lines
19 KiB
C++
411 lines
19 KiB
C++
/*
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* Copyright 2014 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/SkMatrix.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/SkScalar.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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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 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 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 GradData gGradData[] = {
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{ 2, gColors, gPos0 },
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{ 2, gColors, gPos1 },
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{ 5, gColors, gPos2 },
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{ 4, gColorClamp, gPosClamp }
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};
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static sk_sp<SkShader> Make2ConicalOutside(const SkPoint pts[2], const GradData& data,
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SkTileMode 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(center0, radius0, center1, radius1, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalOutsideStrip(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius = (pts[1].fX - pts[0].fX) / 3;
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center0.set(pts[0].fX, pts[0].fY);
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center1.set(pts[1].fX, pts[1].fY);
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return SkGradientShader::MakeTwoPointConical(center0, radius, center1, radius, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalOutsideFlip(const SkPoint pts[2], const GradData& data,
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SkTileMode 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, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalInside(const SkPoint pts[2], const GradData& data,
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SkTileMode 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> Make2ConicalInsideFlip(const SkPoint pts[2], const GradData& data,
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SkTileMode 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(center0, (pts[1].fX - pts[0].fX) / 2,
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center1, (pts[1].fX - pts[0].fX) / 7,
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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> Make2ConicalInsideCenter(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0;
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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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return SkGradientShader::MakeTwoPointConical(center0, (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> Make2ConicalInsideCenterReversed(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0;
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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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return SkGradientShader::MakeTwoPointConical(center0, (pts[1].fX - pts[0].fX) / 2,
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center0, (pts[1].fX - pts[0].fX) / 7,
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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> Make2ConicalZeroRad(const SkPoint pts[2], const GradData& data,
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SkTileMode 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, 0.f,
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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> Make2ConicalZeroRadFlip(const SkPoint pts[2], const GradData& data,
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SkTileMode 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) / 2,
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center0, 0.f,
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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> Make2ConicalZeroRadCenter(const SkPoint pts[2], const GradData& data,
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SkTileMode 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(center0, 0.f, 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> Make2ConicalZeroRadOutside(const SkPoint pts[2], const GradData& data,
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SkTileMode tm,
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const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = 0.f;
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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(center0, radius0, center1, radius1,
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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> Make2ConicalZeroRadFlipOutside(const SkPoint pts[2], const GradData& data,
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SkTileMode tm,
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const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = 0.f;
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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, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalEdgeX(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center0.set(center1.fX + radius1, center1.fY);
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return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalEdgeY(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center0.set(center1.fX, center1.fY + radius1);
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return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalZeroRadEdgeX(const SkPoint pts[2], const GradData& data,
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SkTileMode tm,
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const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = 0.f;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center0.set(center1.fX + radius1, center1.fY);
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return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalZeroRadEdgeY(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = 0.f;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center0.set(center1.fX, center1.fY + radius1);
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return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalTouchX(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center0.set(center1.fX - radius1 + radius0, center1.fY);
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return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalTouchY(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix) {
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SkPoint center0, center1;
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SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
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SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
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center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
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SkScalarAve(pts[0].fY, pts[1].fY));
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center0.set(center1.fX, center1.fY + radius1 - radius0);
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return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
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data.fPos, data.fCount, tm, 0, &localMatrix);
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}
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static sk_sp<SkShader> Make2ConicalInsideSmallRad(const SkPoint pts[2], const GradData& data,
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SkTileMode 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(center0, 0.0000000000000000001f,
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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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typedef sk_sp<SkShader> (*GradMaker)(const SkPoint pts[2], const GradData& data,
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SkTileMode tm, const SkMatrix& localMatrix);
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constexpr GradMaker gGradMakersOutside[] = {
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Make2ConicalOutside, Make2ConicalOutsideFlip,
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Make2ConicalZeroRadOutside, Make2ConicalZeroRadFlipOutside,
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Make2ConicalOutsideStrip
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};
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constexpr GradMaker gGradMakersInside[] = {
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Make2ConicalInside, Make2ConicalInsideFlip, Make2ConicalInsideCenter,
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Make2ConicalZeroRad, Make2ConicalZeroRadFlip, Make2ConicalZeroRadCenter,
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Make2ConicalInsideCenterReversed
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};
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constexpr GradMaker gGradMakersEdgeCases[] = {
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Make2ConicalEdgeX, Make2ConicalEdgeY,
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Make2ConicalZeroRadEdgeX, Make2ConicalZeroRadEdgeY,
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Make2ConicalTouchX, Make2ConicalTouchY,
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Make2ConicalInsideSmallRad
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};
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constexpr struct {
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const GradMaker* fMaker;
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const int fCount;
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const char* fName;
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} gGradCases[] = {
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{ gGradMakersOutside, SK_ARRAY_COUNT(gGradMakersOutside), "outside" },
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{ gGradMakersInside, SK_ARRAY_COUNT(gGradMakersInside), "inside" },
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{ gGradMakersEdgeCases, SK_ARRAY_COUNT(gGradMakersEdgeCases), "edge" },
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};
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enum GradCaseType { // these must match the order in gGradCases
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kOutside_GradCaseType,
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kInside_GradCaseType,
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kEdge_GradCaseType,
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};
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///////////////////////////////////////////////////////////////////////////////
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class ConicalGradientsGM : public GM {
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public:
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ConicalGradientsGM(GradCaseType gradCaseType, bool dither,
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SkTileMode mode = SkTileMode::kClamp)
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: fGradCaseType(gradCaseType)
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, fDither(dither)
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, fMode(mode) {
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fName.printf("gradients_2pt_conical_%s%s", gGradCases[gradCaseType].fName,
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fDither ? "" : "_nodither");
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switch (mode) {
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case SkTileMode::kRepeat:
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fName.appendf("_repeat");
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break;
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case SkTileMode::kMirror:
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fName.appendf("_mirror");
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break;
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default:
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break;
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}
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}
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private:
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void onOnceBeforeDraw() override { this->setBGColor(0xFFDDDDDD); }
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SkString onShortName() override { return fName; }
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SkISize onISize() override { return {840, 815}; }
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void onDraw(SkCanvas* canvas) override {
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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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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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const GradMaker* gradMaker = gGradCases[fGradCaseType].fMaker;
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const int count = gGradCases[fGradCaseType].fCount;
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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 (int j = 0; j < count; j++) {
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SkMatrix scale = SkMatrix::I();
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if (i == 3) { // 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(gradMaker[j](pts, gGradData[i], fMode, 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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private:
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GradCaseType fGradCaseType;
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SkString fName;
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bool fDither;
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SkTileMode fMode;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, true); )
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DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, true); )
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DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, true); )
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DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, true, SkTileMode::kRepeat); )
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DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, true, SkTileMode::kRepeat); )
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DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, true, SkTileMode::kRepeat); )
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DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, true, SkTileMode::kMirror); )
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DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, true, SkTileMode::kMirror); )
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DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, true, SkTileMode::kMirror); )
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DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, false); )
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DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, false); )
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DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, false); )
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} // namespace skiagm
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