ede0c5c778
git-svn-id: http://skia.googlecode.com/svn/trunk@14320 2bbb7eff-a529-9590-31e7-b0007b416f81
375 lines
17 KiB
C++
375 lines
17 KiB
C++
|
|
/*
|
|
* 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, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalOutsideFlip(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalInside(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalInsideFlip(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalInsideCenter(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalZeroRad(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalZeroRadFlip(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalZeroRadCenter(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalZeroRadOutside(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalZeroRadFlipOutside(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalEdgeX(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalEdgeY(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
static SkShader* Make2ConicalZeroRadEdgeX(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalZeroRadEdgeY(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalTouchX(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalTouchY(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
static SkShader* Make2ConicalInsideSmallRad(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper) {
|
|
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, mapper);
|
|
}
|
|
|
|
typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data,
|
|
SkShader::TileMode tm, SkUnitMapper* mapper);
|
|
|
|
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++) {
|
|
SkShader* shader = gradMaker[j](pts, gGradData[i], tm, NULL);
|
|
|
|
if (i == 3) { // if the clamp case
|
|
SkMatrix scale;
|
|
scale.setScale(0.5f, 0.5f);
|
|
scale.postTranslate(25.f, 25.f);
|
|
shader->setLocalMatrix(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);
|
|
}
|