зеркало из https://github.com/mozilla/moz-skia.git
259 строки
9.3 KiB
C++
259 строки
9.3 KiB
C++
/*
|
|
* Copyright 2013 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"
|
|
|
|
using namespace skiagm;
|
|
|
|
struct GradData {
|
|
int fCount;
|
|
const SkColor* fColors;
|
|
const SkScalar* fPos;
|
|
};
|
|
|
|
static const SkColor gColors[] = {
|
|
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE,
|
|
};
|
|
|
|
static const GradData gGradData[] = {
|
|
{ 1, gColors, NULL },
|
|
{ 2, gColors, NULL },
|
|
{ 3, gColors, NULL },
|
|
{ 4, gColors, NULL },
|
|
};
|
|
|
|
static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
|
|
return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos, data.fCount, tm);
|
|
}
|
|
|
|
static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
|
|
SkPoint center;
|
|
center.set(SkScalarAve(pts[0].fX, pts[1].fX),
|
|
SkScalarAve(pts[0].fY, pts[1].fY));
|
|
return SkGradientShader::CreateRadial(center, center.fX, data.fColors,
|
|
data.fPos, data.fCount, tm);
|
|
}
|
|
|
|
static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data, SkShader::TileMode) {
|
|
SkPoint center;
|
|
center.set(SkScalarAve(pts[0].fX, pts[1].fX),
|
|
SkScalarAve(pts[0].fY, pts[1].fY));
|
|
return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors, data.fPos, data.fCount);
|
|
}
|
|
|
|
static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
|
|
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::CreateTwoPointRadial(
|
|
center1, (pts[1].fX - pts[0].fX) / 7,
|
|
center0, (pts[1].fX - pts[0].fX) / 2,
|
|
data.fColors, data.fPos, data.fCount, tm);
|
|
}
|
|
|
|
static SkShader* Make2Conical(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
|
|
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);
|
|
}
|
|
|
|
|
|
typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm);
|
|
|
|
static const GradMaker gGradMakers[] = {
|
|
MakeLinear, MakeRadial, MakeSweep, Make2Radial, Make2Conical,
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
class GradientsNoTextureGM : public GM {
|
|
public:
|
|
GradientsNoTextureGM() {
|
|
this->setBGColor(0xFFDDDDDD);
|
|
}
|
|
|
|
protected:
|
|
virtual uint32_t onGetFlags() const SK_OVERRIDE {
|
|
return kSkipTiled_Flag;
|
|
}
|
|
|
|
SkString onShortName() SK_OVERRIDE { return SkString("gradients_no_texture"); }
|
|
virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(640, 615); }
|
|
|
|
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
|
|
static const SkPoint kPts[2] = { { 0, 0 },
|
|
{ SkIntToScalar(50), SkIntToScalar(50) } };
|
|
static const SkShader::TileMode kTM = SkShader::kClamp_TileMode;
|
|
SkRect kRect = { 0, 0, SkIntToScalar(50), SkIntToScalar(50) };
|
|
SkPaint paint;
|
|
paint.setAntiAlias(true);
|
|
|
|
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
|
|
static const uint8_t kAlphas[] = { 0xff, 0x40 };
|
|
for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphas); ++a) {
|
|
for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); ++i) {
|
|
canvas->save();
|
|
for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); ++j) {
|
|
SkShader* shader = gGradMakers[j](kPts, gGradData[i], kTM);
|
|
paint.setShader(shader)->unref();
|
|
paint.setAlpha(kAlphas[a]);
|
|
canvas->drawRect(kRect, paint);
|
|
canvas->translate(0, SkIntToScalar(kRect.height() + 20));
|
|
}
|
|
canvas->restore();
|
|
canvas->translate(SkIntToScalar(kRect.width() + 20), 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
typedef GM INHERITED;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
struct ColorPos {
|
|
SkColor* fColors;
|
|
SkScalar* fPos;
|
|
int fCount;
|
|
|
|
ColorPos() : fColors(NULL), fPos(NULL), fCount(0) {}
|
|
~ColorPos() {
|
|
SkDELETE_ARRAY(fColors);
|
|
SkDELETE_ARRAY(fPos);
|
|
}
|
|
|
|
void construct(const SkColor colors[], const SkScalar pos[], int count) {
|
|
fColors = SkNEW_ARRAY(SkColor, count);
|
|
memcpy(fColors, colors, count * sizeof(SkColor));
|
|
if (pos) {
|
|
fPos = SkNEW_ARRAY(SkScalar, count);
|
|
memcpy(fPos, pos, count * sizeof(SkScalar));
|
|
fPos[0] = 0;
|
|
fPos[count - 1] = 1;
|
|
}
|
|
fCount = count;
|
|
}
|
|
};
|
|
|
|
static void make0(ColorPos* rec) {
|
|
#if 0
|
|
From http://jsfiddle.net/3fe2a/
|
|
|
|
background-image: -webkit-linear-gradient(left, #22d1cd 1%, #22d1cd 0.9510157507590116%, #df4b37 2.9510157507590113%, #df4b37 23.695886056604927%, #22d1cd 25.695886056604927%, #22d1cd 25.39321881940624%, #e6de36 27.39321881940624%, #e6de36 31.849399922570655%, #3267ff 33.849399922570655%, #3267ff 44.57735802921938%, #9d47d1 46.57735802921938%, #9d47d1 53.27185850805876%, #3267ff 55.27185850805876%, #3267ff 61.95718972227316%, #5cdd9d 63.95718972227316%, #5cdd9d 69.89166004442%, #3267ff 71.89166004442%, #3267ff 74.45795382765857%, #9d47d1 76.45795382765857%, #9d47d1 82.78364610713776%, #3267ff 84.78364610713776%, #3267ff 94.52743647737229%, #e3d082 96.52743647737229%, #e3d082 96.03934633331295%);
|
|
height: 30px;
|
|
#endif
|
|
|
|
const SkColor colors[] = {
|
|
0xFF22d1cd, 0xFF22d1cd, 0xFFdf4b37, 0xFFdf4b37, 0xFF22d1cd, 0xFF22d1cd, 0xFFe6de36, 0xFFe6de36,
|
|
0xFF3267ff, 0xFF3267ff, 0xFF9d47d1, 0xFF9d47d1, 0xFF3267ff, 0xFF3267ff, 0xFF5cdd9d, 0xFF5cdd9d,
|
|
0xFF3267ff, 0xFF3267ff, 0xFF9d47d1, 0xFF9d47d1, 0xFF3267ff, 0xFF3267ff, 0xFFe3d082, 0xFFe3d082
|
|
};
|
|
const double percent[] = {
|
|
1, 0.9510157507590116, 2.9510157507590113, 23.695886056604927,
|
|
25.695886056604927, 25.39321881940624, 27.39321881940624, 31.849399922570655,
|
|
33.849399922570655, 44.57735802921938, 46.57735802921938, 53.27185850805876,
|
|
55.27185850805876, 61.95718972227316, 63.95718972227316, 69.89166004442,
|
|
71.89166004442, 74.45795382765857, 76.45795382765857, 82.78364610713776,
|
|
84.78364610713776, 94.52743647737229, 96.52743647737229, 96.03934633331295,
|
|
};
|
|
const int N = SK_ARRAY_COUNT(percent);
|
|
SkScalar pos[N];
|
|
for (int i = 0; i < N; ++i) {
|
|
pos[i] = SkDoubleToScalar(percent[i] / 100);
|
|
}
|
|
rec->construct(colors, pos, N);
|
|
}
|
|
|
|
static void make1(ColorPos* rec) {
|
|
const SkColor colors[] = {
|
|
SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE,
|
|
SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE,
|
|
SK_ColorBLACK,
|
|
};
|
|
rec->construct(colors, NULL, SK_ARRAY_COUNT(colors));
|
|
}
|
|
|
|
static void make2(ColorPos* rec) {
|
|
const SkColor colors[] = {
|
|
SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE,
|
|
SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE,
|
|
SK_ColorBLACK,
|
|
};
|
|
const int N = SK_ARRAY_COUNT(colors);
|
|
SkScalar pos[N];
|
|
for (int i = 0; i < N; ++i) {
|
|
pos[i] = SK_Scalar1 * i / (N - 1);
|
|
}
|
|
rec->construct(colors, pos, N);
|
|
}
|
|
|
|
class GradientsManyColorsGM : public GM {
|
|
enum {
|
|
W = 800,
|
|
};
|
|
SkAutoTUnref<SkShader> fShader;
|
|
|
|
typedef void (*Proc)(ColorPos*);
|
|
public:
|
|
GradientsManyColorsGM() {}
|
|
|
|
protected:
|
|
virtual uint32_t onGetFlags() const SK_OVERRIDE {
|
|
return kSkipTiled_Flag;
|
|
}
|
|
|
|
SkString onShortName() SK_OVERRIDE { return SkString("gradients_many"); }
|
|
virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(850, 100); }
|
|
|
|
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
|
|
const Proc procs[] = {
|
|
make0, make1, make2,
|
|
};
|
|
const SkPoint pts[] = {
|
|
{ 0, 0 },
|
|
{ SkIntToScalar(W), 0 },
|
|
};
|
|
const SkRect r = SkRect::MakeWH(SkIntToScalar(W), 30);
|
|
|
|
SkPaint paint;
|
|
|
|
canvas->translate(20, 20);
|
|
|
|
for (int i = 0; i <= 8; ++i) {
|
|
SkScalar x = r.width() * i / 8;
|
|
canvas->drawLine(x, 0, x, 10000, paint);
|
|
}
|
|
|
|
for (size_t i = 0; i < SK_ARRAY_COUNT(procs); ++i) {
|
|
ColorPos rec;
|
|
procs[i](&rec);
|
|
SkShader* s = SkGradientShader::CreateLinear(pts, rec.fColors, rec.fPos, rec.fCount,
|
|
SkShader::kClamp_TileMode);
|
|
paint.setShader(s)->unref();
|
|
canvas->drawRect(r, paint);
|
|
canvas->translate(0, r.height() + 20);
|
|
}
|
|
}
|
|
|
|
private:
|
|
typedef GM INHERITED;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
DEF_GM( return SkNEW(GradientsNoTextureGM));
|
|
DEF_GM( return SkNEW(GradientsManyColorsGM));
|