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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 "SkBlurMask.h"
#include "SkCanvas.h"
#include "SkMaskFilter.h"
#include "SkParsePath.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkView.h"
static void test_huge_stroke(SkCanvas* canvas) {
SkRect srcR = { 0, 0, 72000, 54000 };
SkRect dstR = { 0, 0, 640, 480 };
SkPath path;
path.moveTo(17600, 8000);
path.lineTo(52800, 8000);
path.lineTo(52800, 41600);
path.lineTo(17600, 41600);
path.close();
SkPaint paint;
paint.setAntiAlias(true);
paint.setStrokeWidth(8000);
paint.setStrokeMiter(10);
paint.setStrokeCap(SkPaint::kButt_Cap);
paint.setStrokeJoin(SkPaint::kRound_Join);
paint.setStyle(SkPaint::kStroke_Style);
SkMatrix matrix;
matrix.setRectToRect(srcR, dstR, SkMatrix::kCenter_ScaleToFit);
canvas->concat(matrix);
canvas->drawPath(path, paint);
}
#if 0
static void test_blur() {
uint8_t cell[9];
memset(cell, 0xFF, sizeof(cell));
SkMask src;
src.fImage = cell;
src.fFormat = SkMask::kA8_Format;
SkMask dst;
for (int y = 1; y <= 3; y++) {
for (int x = 1; x <= 3; x++) {
src.fBounds.set(0, 0, x, y);
src.fRowBytes = src.fBounds.width();
SkScalar radius = 1.f;
printf("src [%d %d %d %d] radius %g\n", src.fBounds.fLeft, src.fBounds.fTop,
src.fBounds.fRight, src.fBounds.fBottom, radius);
SkBlurMask::Blur(&dst, src, radius, SkBlurMask::kNormal_Style);
uint8_t* dstPtr = dst.fImage;
for (int y = 0; y < dst.fBounds.height(); y++) {
for (int x = 0; x < dst.fBounds.width(); x++) {
printf(" %02X", dstPtr[x]);
}
printf("\n");
dstPtr += dst.fRowBytes;
}
}
}
}
#endif
static void scale_to_width(SkPath* path, SkScalar dstWidth) {
const SkRect& bounds = path->getBounds();
SkScalar scale = dstWidth / bounds.width();
SkMatrix matrix;
matrix.setScale(scale, scale);
path->transform(matrix);
}
static const struct {
SkPaint::Style fStyle;
SkPaint::Join fJoin;
int fStrokeWidth;
} gRec[] = {
{ SkPaint::kFill_Style, SkPaint::kMiter_Join, 0 },
{ SkPaint::kStroke_Style, SkPaint::kMiter_Join, 0 },
{ SkPaint::kStroke_Style, SkPaint::kMiter_Join, 10 },
{ SkPaint::kStrokeAndFill_Style, SkPaint::kMiter_Join, 10 },
};
class StrokePathView : public SampleView {
SkScalar fWidth;
SkPath fPath;
protected:
void onOnceBeforeDraw() override {
// test_blur();
fWidth = SkIntToScalar(120);
#if 0
const char str[] =
"M 0, 3"
"C 10, -10, 30, -10, 0, 28"
"C -30, -10, -10, -10, 0, 3"
"Z";
SkParsePath::FromSVGString(str, &fPath);
#else
fPath.addCircle(0, 0, SkIntToScalar(50), SkPath::kCW_Direction);
fPath.addCircle(0, SkIntToScalar(-50), SkIntToScalar(30), SkPath::kCW_Direction);
#endif
scale_to_width(&fPath, fWidth);
const SkRect& bounds = fPath.getBounds();
fPath.offset(-bounds.fLeft, -bounds.fTop);
this->setBGColor(0xFFDDDDDD);
}
// overrides from SkEventSink
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "StrokePath");
return true;
}
return this->INHERITED::onQuery(evt);
}
SkRandom rand;
void drawSet(SkCanvas* canvas, SkPaint* paint) {
SkAutoCanvasRestore acr(canvas, true);
for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); i++) {
paint->setStyle(gRec[i].fStyle);
paint->setStrokeJoin(gRec[i].fJoin);
paint->setStrokeWidth(SkIntToScalar(gRec[i].fStrokeWidth));
canvas->drawPath(fPath, *paint);
canvas->translate(fWidth * 5 / 4, 0);
}
}
void onDrawContent(SkCanvas* canvas) override {
test_huge_stroke(canvas); return;
canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
SkPaint paint;
paint.setAntiAlias(true);
if (true) {
canvas->drawColor(SK_ColorBLACK);
paint.setTextSize(24);
paint.setColor(SK_ColorWHITE);
canvas->translate(10, 30);
static const SkBlurStyle gStyle[] = {
kNormal_SkBlurStyle,
kInner_SkBlurStyle,
kOuter_SkBlurStyle,
kSolid_SkBlurStyle,
};
for (int x = 0; x < 5; x++) {
SkScalar sigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4));
for (int y = 0; y < 10; y++) {
if (x) {
paint.setMaskFilter(SkMaskFilter::MakeBlur(gStyle[x - 1], sigma));
}
canvas->drawString("Title Bar", x*SkIntToScalar(100), y*SkIntToScalar(30), paint);
sigma *= 0.75f;
}
}
return;
}
paint.setColor(SK_ColorBLUE);
#if 1
SkPath p;
float r = rand.nextUScalar1() + 0.5f;
SkScalar x = 0, y = 0;
p.moveTo(x, y);
#if 0
p.cubicTo(x-75*r, y+75*r, x-40*r, y+125*r, x, y+85*r);
p.cubicTo(x+40*r, y+125*r, x+75*r, y+75*r, x, y);
#else
p.cubicTo(x+75*r, y+75*r, x+40*r, y+125*r, x, y+85*r);
p.cubicTo(x-40*r, y+125*r, x-75*r, y+75*r, x, y);
#endif
p.close();
fPath = p;
fPath.offset(100, 0);
#endif
fPath.setFillType(SkPath::kWinding_FillType);
drawSet(canvas, &paint);
canvas->translate(0, fPath.getBounds().height() * 5 / 4);
fPath.setFillType(SkPath::kEvenOdd_FillType);
drawSet(canvas, &paint);
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new StrokePathView; }
static SkViewRegister reg(MyFactory);
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