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/*
* 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 "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkXfermode.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkParsePath.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkGeometry.h"
// http://code.google.com/p/skia/issues/detail?id=32
static void test_cubic() {
SkPoint src[4] = {
{ 556.25000f, 523.03003f },
{ 556.23999f, 522.96002f },
{ 556.21997f, 522.89001f },
{ 556.21997f, 522.82001f }
};
SkPoint dst[11];
dst[10].set(42, -42); // one past the end, that we don't clobber these
SkScalar tval[] = { 0.33333334f, 0.99999994f };
SkChopCubicAt(src, dst, tval, 2);
#if 0
for (int i = 0; i < 11; i++) {
SkDebugf("--- %d [%g %g]\n", i, dst[i].fX, dst[i].fY);
}
#endif
}
static void test_cubic2() {
const char* str = "M2242 -590088L-377758 9.94099e+07L-377758 9.94099e+07L2242 -590088Z";
SkPath path;
SkParsePath::FromSVGString(str, &path);
{
#ifdef SK_BUILD_FOR_WIN
// windows doesn't have strtof
float x = (float)strtod("9.94099e+07", NULL);
#else
float x = strtof("9.94099e+07", NULL);
#endif
int ix = (int)x;
int fx = (int)(x * 65536);
int ffx = SkScalarToFixed(x);
SkDebugf("%g %x %x %x\n", x, ix, fx, ffx);
SkRect r = path.getBounds();
SkIRect ir;
r.round(&ir);
SkDebugf("[%g %g %g %g] [%x %x %x %x]\n",
SkScalarToDouble(r.fLeft), SkScalarToDouble(r.fTop),
SkScalarToDouble(r.fRight), SkScalarToDouble(r.fBottom),
ir.fLeft, ir.fTop, ir.fRight, ir.fBottom);
}
SkBitmap bitmap;
bitmap.allocN32Pixels(300, 200);
SkCanvas canvas(bitmap);
SkPaint paint;
paint.setAntiAlias(true);
canvas.drawPath(path, paint);
}
class PathView : public SampleView {
public:
int fDStroke, fStroke, fMinStroke, fMaxStroke;
SkPath fPath[6];
bool fShowHairline;
bool fOnce;
PathView() {
fOnce = false;
}
void init() {
if (fOnce) {
return;
}
fOnce = true;
test_cubic();
test_cubic2();
fShowHairline = false;
fDStroke = 1;
fStroke = 10;
fMinStroke = 10;
fMaxStroke = 180;
const int V = 85;
fPath[0].moveTo(SkIntToScalar(40), SkIntToScalar(70));
fPath[0].lineTo(SkIntToScalar(70), SkIntToScalar(70) + SK_Scalar1/1);
fPath[0].lineTo(SkIntToScalar(110), SkIntToScalar(70));
fPath[1].moveTo(SkIntToScalar(40), SkIntToScalar(70));
fPath[1].lineTo(SkIntToScalar(70), SkIntToScalar(70) - SK_Scalar1/1);
fPath[1].lineTo(SkIntToScalar(110), SkIntToScalar(70));
fPath[2].moveTo(SkIntToScalar(V), SkIntToScalar(V));
fPath[2].lineTo(SkIntToScalar(50), SkIntToScalar(V));
fPath[2].lineTo(SkIntToScalar(50), SkIntToScalar(50));
fPath[3].moveTo(SkIntToScalar(50), SkIntToScalar(50));
fPath[3].lineTo(SkIntToScalar(50), SkIntToScalar(V));
fPath[3].lineTo(SkIntToScalar(V), SkIntToScalar(V));
fPath[4].moveTo(SkIntToScalar(50), SkIntToScalar(50));
fPath[4].lineTo(SkIntToScalar(50), SkIntToScalar(V));
fPath[4].lineTo(SkIntToScalar(52), SkIntToScalar(50));
fPath[5].moveTo(SkIntToScalar(52), SkIntToScalar(50));
fPath[5].lineTo(SkIntToScalar(50), SkIntToScalar(V));
fPath[5].lineTo(SkIntToScalar(50), SkIntToScalar(50));
this->setBGColor(0xFFDDDDDD);
}
void nextStroke() {
fStroke += fDStroke;
if (fStroke > fMaxStroke || fStroke < fMinStroke)
fDStroke = -fDStroke;
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Paths");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawPath(SkCanvas* canvas, const SkPath& path, SkPaint::Join j) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeJoin(j);
paint.setStrokeWidth(SkIntToScalar(fStroke));
if (fShowHairline) {
SkPath fill;
paint.getFillPath(path, &fill);
paint.setStrokeWidth(0);
canvas->drawPath(fill, paint);
} else {
canvas->drawPath(path, paint);
}
paint.setColor(SK_ColorRED);
paint.setStrokeWidth(0);
canvas->drawPath(path, paint);
}
virtual void onDrawContent(SkCanvas* canvas) {
this->init();
canvas->translate(SkIntToScalar(50), SkIntToScalar(50));
static const SkPaint::Join gJoins[] = {
SkPaint::kBevel_Join,
SkPaint::kMiter_Join,
SkPaint::kRound_Join
};
for (size_t i = 0; i < SK_ARRAY_COUNT(gJoins); i++) {
canvas->save();
for (size_t j = 0; j < SK_ARRAY_COUNT(fPath); j++) {
this->drawPath(canvas, fPath[j], gJoins[i]);
canvas->translate(SkIntToScalar(200), 0);
}
canvas->restore();
canvas->translate(0, SkIntToScalar(200));
}
this->nextStroke();
this->inval(NULL);
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) SK_OVERRIDE {
fShowHairline = !fShowHairline;
this->inval(NULL);
return this->INHERITED::onFindClickHandler(x, y, modi);
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new PathView; }
static SkViewRegister reg(MyFactory);
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