/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SampleCode.h"
#include "SkBlurMask.h"
#include "SkCanvas.h"
#include "SkView.h"
#include "Sk1DPathEffect.h"
#include "Sk2DPathEffect.h"
#include "SkBlurMaskFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkColorPriv.h"
#include "SkCornerPathEffect.h"
#include "SkDashPathEffect.h"
#include "SkDiscretePathEffect.h"
#include "SkEmbossMaskFilter.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkGradientShader.h"
#include "SkMath.h"
#include "SkPath.h"
#include "SkPictureRecorder.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkCornerPathEffect.h"
#include "SkPathMeasure.h"
#include "SkPicture.h"
#include "SkRandom.h"
#include "SkTypeface.h"
#include "SkUtils.h"
#include <math.h>
#include "DecodeFile.h"
class Dot2DPathEffect : public Sk2DPathEffect {
public:
Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix)
: Sk2DPathEffect(matrix), fRadius(radius) {}
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Dot2DPathEffect)
protected:
void next(const SkPoint& loc, int u, int v, SkPath* dst) const override {
dst->addCircle(loc.fX, loc.fY, fRadius);
}
void flatten(SkWriteBuffer& buffer) const override {
this->INHERITED::flatten(buffer);
buffer.writeScalar(fRadius);
}
private:
SkScalar fRadius;
typedef Sk2DPathEffect INHERITED;
};
class DemoView : public SampleView {
public:
DemoView() {}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Demo");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual bool onClick(Click* click) {
return this->INHERITED::onClick(click);
}
void makePath(SkPath& path) {
path.addCircle(SkIntToScalar(20), SkIntToScalar(20), SkIntToScalar(20),
SkPath::kCCW_Direction);
for (int index = 0; index < 10; index++) {
SkScalar x = (float) cos(index / 10.0f * 2 * 3.1415925358f);
SkScalar y = (float) sin(index / 10.0f * 2 * 3.1415925358f);
x *= index & 1 ? 7 : 14;
y *= index & 1 ? 7 : 14;
x += SkIntToScalar(20);
y += SkIntToScalar(20);
if (index == 0)
path.moveTo(x, y);
else
path.lineTo(x, y);
}
path.close();
}
virtual void onDrawContent(SkCanvas* canvas) {
canvas->save();
this->drawPicture(canvas, 0);
canvas->restore();
{
SkPictureRecorder recorder;
{
SkCanvas* record = recorder.beginRecording(320, 480, nullptr, 0);
this->drawPicture(record, 120);
}
sk_sp<SkPicture> picture(recorder.finishRecordingAsPicture());
canvas->translate(0, SkIntToScalar(120));
SkRect clip;
clip.set(0, 0, SkIntToScalar(160), SkIntToScalar(160));
do {
canvas->save();
canvas->clipRect(clip);
picture->playback(canvas);
canvas->restore();
if (clip.fRight < SkIntToScalar(320))
clip.offset(SkIntToScalar(160), 0);
else if (clip.fBottom < SkIntToScalar(480))
clip.offset(-SkIntToScalar(320), SkIntToScalar(160));
else
break;
} while (true);
}
}
void drawPicture(SkCanvas* canvas, int spriteOffset) {
SkMatrix matrix; matrix.reset();
SkPaint paint;
SkPath path;
SkPoint start = {0, 0};
SkPoint stop = { SkIntToScalar(40), SkIntToScalar(40) };
SkRect rect = {0, 0, SkIntToScalar(40), SkIntToScalar(40) };
SkRect rect2 = {0, 0, SkIntToScalar(65), SkIntToScalar(20) };
SkScalar left = 0, top = 0, x = 0, y = 0;
int index;
char ascii[] = "ascii...";
int asciiLength = sizeof(ascii) - 1;
char utf8[] = "utf8" "\xe2\x80\xa6";
short utf16[] = {'u', 't', 'f', '1', '6', 0x2026 };
short utf16simple[] = {'u', 't', 'f', '1', '6', '!' };
makePath(path);
SkTDArray<SkPoint> pos;
pos.setCount(asciiLength);
for (index = 0; index < asciiLength; index++)
pos[index].set(SkIntToScalar((unsigned int)index * 10),
SkIntToScalar((unsigned int)index * 2));
SkTDArray<SkPoint> pos2;
pos2.setCount(asciiLength);
for (index = 0; index < asciiLength; index++)
pos2[index].set(SkIntToScalar((unsigned int)index * 10),
SkIntToScalar(20));
// shaders
SkPoint linearPoints[] = { { 0, 0, }, { SkIntToScalar(40), SkIntToScalar(40) } };
SkColor linearColors[] = { SK_ColorRED, SK_ColorBLUE };
SkScalar* linearPos = nullptr;
int linearCount = 2;
SkShader::TileMode linearMode = SkShader::kMirror_TileMode;
auto linear = SkGradientShader::MakeLinear(linearPoints,
linearColors, linearPos, linearCount, linearMode);
SkPoint radialCenter = { SkIntToScalar(25), SkIntToScalar(25) };
SkScalar radialRadius = SkIntToScalar(25);
SkColor radialColors[] = { SK_ColorGREEN, SK_ColorGRAY, SK_ColorRED };
SkScalar radialPos[] = { 0, SkIntToScalar(3) / 5, SkIntToScalar(1)};
int radialCount = 3;
SkShader::TileMode radialMode = SkShader::kRepeat_TileMode;
auto radial = SkGradientShader::MakeRadial(radialCenter,
radialRadius, radialColors, radialPos, radialCount,
radialMode);
SkEmbossMaskFilter::Light light;
light.fDirection[0] = SK_Scalar1/2;
light.fDirection[1] = SK_Scalar1/2;
light.fDirection[2] = SK_Scalar1/3;
light.fAmbient = 0x48;
light.fSpecular = 0x80;
auto lightingFilter = SkColorMatrixFilter::MakeLightingFilter(
0xff89bc45, 0xff112233);
canvas->save();
canvas->translate(SkIntToScalar(0), SkIntToScalar(5));
paint.setAntiAlias(true);
paint.setFilterQuality(kLow_SkFilterQuality);
// !!! draw through a clip
paint.setColor(SK_ColorLTGRAY);
paint.setStyle(SkPaint::kFill_Style);
SkRect clip = {0, 0, SkIntToScalar(320), SkIntToScalar(120)};
canvas->clipRect(clip);
paint.setShader(SkShader::MakeBitmapShader(fTx,
SkShader::kMirror_TileMode, SkShader::kRepeat_TileMode));
canvas->drawPaint(paint);
canvas->save();
// line (exercises xfermode, colorShader, colorFilter, filterShader)
paint.setColor(SK_ColorGREEN);
paint.setStrokeWidth(SkIntToScalar(10));
paint.setStyle(SkPaint::kStroke_Style);
paint.setBlendMode(SkBlendMode::kXor);
paint.setColorFilter(lightingFilter);
canvas->drawLine(start, stop, paint); // should not be green
paint.setBlendMode(SkBlendMode::kSrcOver);
paint.setColorFilter(nullptr);
// rectangle
paint.setStyle(SkPaint::kFill_Style);
canvas->translate(SkIntToScalar(50), 0);
paint.setColor(SK_ColorYELLOW);
paint.setShader(linear);
paint.setPathEffect(pathEffectTest());
canvas->drawRect(rect, paint);
paint.setPathEffect(nullptr);
// circle w/ emboss & transparent (exercises 3dshader)
canvas->translate(SkIntToScalar(50), 0);
paint.setMaskFilter(SkEmbossMaskFilter::Make(
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(12)/5), light));
canvas->drawOval(rect, paint);
canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
// paint.setShader(transparentShader)->unref();
canvas->drawOval(rect, paint);
canvas->translate(0, SkIntToScalar(-10));
// path
canvas->translate(SkIntToScalar(50), 0);
paint.setColor(SK_ColorRED);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(5));
paint.setShader(radial);
paint.setMaskFilter(nullptr);
canvas->drawPath(path, paint);
paint.setShader(nullptr);
// bitmap
canvas->translate(SkIntToScalar(50), 0);
paint.setStyle(SkPaint::kFill_Style);
canvas->drawBitmap(fBug, left, top, &paint);
canvas->translate(-SkIntToScalar(30), SkIntToScalar(30));
paint.setShader(shaderTest()); // test compose shader
canvas->drawRect(rect2, paint);
paint.setShader(nullptr);
canvas->restore();
// text
canvas->translate(0, SkIntToScalar(60));
canvas->save();
paint.setColor(SK_ColorGRAY);
canvas->drawPosText(ascii, asciiLength, pos.begin(), paint);
canvas->drawPosText(ascii, asciiLength, pos2.begin(), paint);
canvas->translate(SkIntToScalar(50), 0);
paint.setColor(SK_ColorCYAN);
canvas->drawText(utf8, sizeof(utf8) - 1, x, y, paint);
canvas->translate(SkIntToScalar(30), 0);
paint.setColor(SK_ColorMAGENTA);
paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
matrix.setTranslate(SkIntToScalar(10), SkIntToScalar(10));
canvas->drawTextOnPath((void*) utf16, sizeof(utf16), path, &matrix, paint);
canvas->translate(0, SkIntToScalar(20));
canvas->drawTextOnPath((void*) utf16simple, sizeof(utf16simple), path, &matrix, paint);
canvas->restore();
canvas->translate(0, SkIntToScalar(60));
paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
canvas->restore();
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) {
fClickPt.set(x, y);
return this->INHERITED::onFindClickHandler(x, y, modi);
}
sk_sp<SkPathEffect> pathEffectTest() {
static const int gXY[] = { 1, 0, 0, -1, 2, -1, 3, 0, 2, 1, 0, 1 };
SkScalar gPhase = 0;
SkPath path;
path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1]));
for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2)
path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1]));
path.close();
path.offset(SkIntToScalar(-6), 0);
auto outer = SkPath1DPathEffect::Make(path, SkIntToScalar(12),
gPhase, SkPath1DPathEffect::kRotate_Style);
auto inner = SkDiscretePathEffect::Make(SkIntToScalar(2),
SkIntToScalar(1)/10); // SkCornerPathEffect(SkIntToScalar(2));
return SkPathEffect::MakeCompose(outer, inner);
}
sk_sp<SkShader> shaderTest() {
SkPoint pts[] = { { 0, 0, }, { SkIntToScalar(100), 0 } };
SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
auto shaderA = SkGradientShader::MakeLinear(pts, colors, nullptr,
2, SkShader::kClamp_TileMode);
pts[1].set(0, SkIntToScalar(100));
SkColor colors2[] = {SK_ColorBLACK, SkColorSetARGB(0x80, 0, 0, 0)};
auto shaderB = SkGradientShader::MakeLinear(pts, colors2, nullptr,
2, SkShader::kClamp_TileMode);
return SkShader::MakeComposeShader(std::move(shaderA), std::move(shaderB),
SkBlendMode::kDstIn);
}
virtual void startTest() {
decode_file("/Users/caryclark/Desktop/bugcirc.gif", &fBug);
decode_file("/Users/caryclark/Desktop/tbcirc.gif", &fTb);
decode_file("/Users/caryclark/Desktop/05psp04.gif", &fTx);
}
private:
SkPoint fClickPt;
SkBitmap fBug, fTb, fTx;
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new DemoView; }
static SkViewRegister reg(MyFactory);