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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkGradientShader.h"
namespace skiagm {
struct GradData {
int fCount;
const SkColor* fColors;
const SkScalar* fPos;
};
static const SkColor gColors[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK
};
static const SkScalar gPos0[] = { 0, SK_Scalar1 };
static const SkScalar gPos1[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
static const SkScalar gPos2[] = {
0, SK_Scalar1/8, SK_Scalar1/2, SK_Scalar1*7/8, SK_Scalar1
};
static const SkScalar gPosClamp[] = {0.0f, 0.0f, 1.0f, 1.0f};
static const SkColor gColorClamp[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorGREEN, SK_ColorBLUE
};
static const GradData gGradData[] = {
{ 2, gColors, gPos0 },
{ 2, gColors, gPos1 },
{ 5, gColors, gPos2 },
{ 4, gColorClamp, gPosClamp }
};
static SkShader* Make2ConicalOutside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalOutsideFlip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::CreateTwoPointConical(center1, radius1,
center0, radius0,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalInside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static SkShader* Make2ConicalInsideFlip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointConical(center0, (pts[1].fX - pts[0].fX) / 2,
center1, (pts[1].fX - pts[0].fX) / 7,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static SkShader* Make2ConicalInsideCenter(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointConical(center0, (pts[1].fX - pts[0].fX) / 7,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static SkShader* Make2ConicalZeroRad(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointConical(center1, 0.f,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static SkShader* Make2ConicalZeroRadFlip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 2,
center0, 0.f,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static SkShader* Make2ConicalZeroRadCenter(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointConical(center0, 0.f,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static SkShader* Make2ConicalZeroRadOutside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalZeroRadFlipOutside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::CreateTwoPointConical(center1, radius1,
center0, radius0,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalEdgeX(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 7);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX + radius1, center1.fY);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalEdgeY(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 7);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX, center1.fY + radius1);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalZeroRadEdgeX(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX + radius1, center1.fY);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalZeroRadEdgeY(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX, center1.fY + radius1);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalTouchX(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 7);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX - radius1 + radius0, center1.fY);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalTouchY(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 7);
SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX, center1.fY + radius1 - radius0);
return SkGradientShader::CreateTwoPointConical(center0, radius0,
center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static SkShader* Make2ConicalInsideSmallRad(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointConical(center0, 0.0000000000000000001f,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix);
static const GradMaker gGradMakersOutside[] = {
Make2ConicalOutside, Make2ConicalOutsideFlip,
Make2ConicalZeroRadOutside, Make2ConicalZeroRadFlipOutside
};
static const GradMaker gGradMakersInside[] = {
Make2ConicalInside, Make2ConicalInsideFlip, Make2ConicalInsideCenter,
Make2ConicalZeroRad, Make2ConicalZeroRadFlip, Make2ConicalZeroRadCenter,
};
static const GradMaker gGradMakersEdgeCases[] = {
Make2ConicalEdgeX, Make2ConicalEdgeY,
Make2ConicalZeroRadEdgeX, Make2ConicalZeroRadEdgeY,
Make2ConicalTouchX, Make2ConicalTouchY,
Make2ConicalInsideSmallRad
};
static const struct {
const GradMaker* fMaker;
const int fCount;
const char* fName;
} gGradCases[] = {
{ gGradMakersOutside, SK_ARRAY_COUNT(gGradMakersOutside), "outside" },
{ gGradMakersInside, SK_ARRAY_COUNT(gGradMakersInside), "inside" },
{ gGradMakersEdgeCases, SK_ARRAY_COUNT(gGradMakersEdgeCases), "edge" },
};
enum GradCaseType { // these must match the order in gGradCases
kOutside_GradCaseType,
kInside_GradCaseType,
kEdge_GradCaseType,
};
///////////////////////////////////////////////////////////////////////////////
class ConicalGradientsGM : public GM {
public:
ConicalGradientsGM(GradCaseType gradCaseType) {
this->setBGColor(0xFFDDDDDD);
fName.printf("gradients_2pt_conical_%s", gGradCases[gradCaseType].fName);
fGradCaseType = gradCaseType;
}
protected:
SkString onShortName() {
return fName;
}
virtual SkISize onISize() { return SkISize::Make(840, 815); }
virtual void onDraw(SkCanvas* canvas) {
SkPoint pts[2] = {
{ 0, 0 },
{ SkIntToScalar(100), SkIntToScalar(100) }
};
SkShader::TileMode tm = SkShader::kClamp_TileMode;
SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
SkPaint paint;
paint.setAntiAlias(true);
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
const GradMaker* gradMaker = gGradCases[fGradCaseType].fMaker;
const int count = gGradCases[fGradCaseType].fCount;
for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
canvas->save();
for (int j = 0; j < count; j++) {
SkMatrix scale = SkMatrix::I();
if (i == 3) { // if the clamp case
scale.setScale(0.5f, 0.5f);
scale.postTranslate(25.f, 25.f);
}
SkShader* shader = gradMaker[j](pts, gGradData[i], tm, scale);
paint.setShader(shader);
canvas->drawRect(r, paint);
shader->unref();
canvas->translate(0, SkIntToScalar(120));
}
canvas->restore();
canvas->translate(SkIntToScalar(120), 0);
}
}
private:
typedef GM INHERITED;
GradCaseType fGradCaseType;
SkString fName;
};
///////////////////////////////////////////////////////////////////////////////
static GM* MyFactory1(void*) { return new ConicalGradientsGM(kInside_GradCaseType); }
static GMRegistry reg1(MyFactory1);
static GM* MyFactory2(void*) { return new ConicalGradientsGM(kOutside_GradCaseType); }
static GMRegistry reg2(MyFactory2);
static GM* MyFactory3(void*) { return new ConicalGradientsGM(kEdge_GradCaseType); }
static GMRegistry reg3(MyFactory3);
}
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