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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 "SkAAClip.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkColorPriv.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkClipOpPriv.h"
constexpr int W = 150;
constexpr int H = 200;
static void show_text(SkCanvas* canvas, bool doAA) {
SkRandom rand;
SkPaint paint;
paint.setAntiAlias(doAA);
paint.setLCDRenderText(true);
paint.setTextSize(SkIntToScalar(20));
for (int i = 0; i < 200; ++i) {
paint.setColor((SK_A32_MASK << SK_A32_SHIFT) | rand.nextU());
canvas->drawString("Hamburgefons",
rand.nextSScalar1() * W, rand.nextSScalar1() * H + 20,
paint);
}
}
static void show_fill(SkCanvas* canvas, bool doAA) {
SkRandom rand;
SkPaint paint;
paint.setAntiAlias(doAA);
for (int i = 0; i < 50; ++i) {
SkRect r;
SkPath p;
r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
rand.nextUScalar1() * W, rand.nextUScalar1() * H);
paint.setColor(rand.nextU());
canvas->drawRect(r, paint);
r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
rand.nextUScalar1() * W, rand.nextUScalar1() * H);
paint.setColor(rand.nextU());
p.addOval(r);
canvas->drawPath(p, paint);
}
}
static SkScalar randRange(SkRandom& rand, SkScalar min, SkScalar max) {
SkASSERT(min <= max);
return min + rand.nextUScalar1() * (max - min);
}
static void show_stroke(SkCanvas* canvas, bool doAA, SkScalar strokeWidth, int n) {
SkRandom rand;
SkPaint paint;
paint.setAntiAlias(doAA);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(strokeWidth);
for (int i = 0; i < n; ++i) {
SkRect r;
SkPath p;
r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
rand.nextUScalar1() * W, rand.nextUScalar1() * H);
paint.setColor(rand.nextU());
canvas->drawRect(r, paint);
r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
rand.nextUScalar1() * W, rand.nextUScalar1() * H);
paint.setColor(rand.nextU());
p.addOval(r);
canvas->drawPath(p, paint);
const SkScalar minx = -SkIntToScalar(W)/4;
const SkScalar maxx = 5*SkIntToScalar(W)/4;
const SkScalar miny = -SkIntToScalar(H)/4;
const SkScalar maxy = 5*SkIntToScalar(H)/4;
paint.setColor(rand.nextU());
canvas->drawLine(randRange(rand, minx, maxx), randRange(rand, miny, maxy),
randRange(rand, minx, maxx), randRange(rand, miny, maxy),
paint);
}
}
static void show_hair(SkCanvas* canvas, bool doAA) {
show_stroke(canvas, doAA, 0, 150);
}
static void show_thick(SkCanvas* canvas, bool doAA) {
show_stroke(canvas, doAA, SkIntToScalar(5), 50);
}
typedef void (*CanvasProc)(SkCanvas*, bool);
class ClipView : public SampleView {
public:
ClipView() {
SkAAClip clip;
SkIRect r = { -2, -3, 842, 18 };
clip.setRect(r);
}
virtual ~ClipView() {
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Clip");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
canvas->drawColor(SK_ColorWHITE);
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
static const CanvasProc gProc[] = {
show_text, show_thick, show_hair, show_fill
};
SkRect r = { 0, 0, SkIntToScalar(W), SkIntToScalar(H) };
SkPath clipPath;
r.inset(SK_Scalar1 / 4, SK_Scalar1 / 4);
clipPath.addRoundRect(r, SkIntToScalar(20), SkIntToScalar(20));
// clipPath.toggleInverseFillType();
for (int aa = 0; aa <= 1; ++aa) {
canvas->save();
for (size_t i = 0; i < SK_ARRAY_COUNT(gProc); ++i) {
canvas->save();
canvas->clipPath(clipPath, kIntersect_SkClipOp, SkToBool(aa));
// canvas->drawColor(SK_ColorWHITE);
gProc[i](canvas, SkToBool(aa));
canvas->restore();
canvas->translate(W * SK_Scalar1 * 8 / 7, 0);
}
canvas->restore();
canvas->translate(0, H * SK_Scalar1 * 8 / 7);
}
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new ClipView; }
static SkViewRegister reg(MyFactory);
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