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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 "SkBitmap.h"
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkShader.h"
static SkBitmap createBitmap(int n) {
SkBitmap bitmap;
bitmap.allocN32Pixels(n, n);
bitmap.eraseColor(SK_ColorGREEN);
SkCanvas canvas(bitmap);
SkRect r;
r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n));
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorRED);
canvas.drawOval(r, paint);
paint.setColor(SK_ColorBLUE);
paint.setStrokeWidth(SkIntToScalar(n)/15);
paint.setStyle(SkPaint::kStroke_Style);
canvas.drawLine(0, 0, r.fRight, r.fBottom, paint);
canvas.drawLine(0, r.fBottom, r.fRight, 0, paint);
return bitmap;
}
class AARectView : public SampleView {
SkBitmap fBitmap;
enum {
N = 64
};
protected:
void onOnceBeforeDraw() override {
fBitmap = createBitmap(N);
fWidth = N;
}
// overrides from SkEventSink
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "AA Rects");
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
SkPaint bluePaint;
bluePaint.setARGB(0xff, 0x0, 0x0, 0xff);
SkPaint bmpPaint;
bmpPaint.setShader(SkShader::MakeBitmapShader(fBitmap, SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode));
bluePaint.setStrokeWidth(3);
bmpPaint.setStrokeWidth(3);
SkPaint paints[] = { bluePaint, bmpPaint };
SkRect rect;
SkScalar dx = SkIntToScalar(80);
SkScalar dy = SkIntToScalar(100);
SkMatrix matrix;
for (size_t p = 0; p < SK_ARRAY_COUNT(paints); ++p) {
for (int stroke = 0; stroke < 2; ++stroke) {
paints[p].setStyle(stroke ? SkPaint::kStroke_Style : SkPaint::kFill_Style);
for (int a = 0; a < 3; ++ a) {
paints[p].setAntiAlias(a > 0);
paints[p].setAlpha(a > 1 ? 0x80 : 0xff);
canvas->save();
rect = SkRect::MakeLTRB(0.f,
0.f,
40.f,
40.f);
canvas->drawRect(rect, paints[p]);
canvas->translate(dx, 0);
rect = SkRect::MakeLTRB(0.5f,
0.5f,
40.5f,
40.5f);
canvas->drawRect(rect, paints[p]);
canvas->translate(dx, 0);
rect = SkRect::MakeLTRB(0.5f,
0.5f,
40.f,
40.f);
canvas->drawRect(rect, paints[p]);
canvas->translate(dx, 0);
rect = SkRect::MakeLTRB(0.75f,
0.75f,
40.75f,
40.75f);
canvas->drawRect(rect, paints[p]);
canvas->translate(dx, 0);
canvas->save();
canvas->translate(.33f, .67f);
rect = SkRect::MakeLTRB(0.0f,
0.0f,
40.0f,
40.0f);
canvas->drawRect(rect, paints[p]);
canvas->restore();
canvas->translate(dx, 0);
canvas->save();
matrix.setRotate(45.f);
canvas->concat(matrix);
canvas->translate(20.0f / sqrtf(2.f),
20.0f / sqrtf(2.f));
rect = SkRect::MakeLTRB(-20.0f,
-20.0f,
20.0f,
20.0f);
canvas->drawRect(rect, paints[p]);
canvas->restore();
canvas->translate(dx, 0);
canvas->save();
canvas->rotate(90.f);
rect = SkRect::MakeLTRB(0.0f,
0.0f,
40.0f,
-40.0f);
canvas->drawRect(rect, paints[p]);
canvas->restore();
canvas->translate(dx, 0);
canvas->save();
canvas->rotate(90.f);
rect = SkRect::MakeLTRB(0.5f,
0.5f,
40.5f,
-40.5f);
canvas->drawRect(rect, paints[p]);
canvas->restore();
canvas->translate(dx, 0);
canvas->save();
matrix.setScale(-1.f, -1.f);
canvas->concat(matrix);
rect = SkRect::MakeLTRB(0.5f,
0.5f,
-40.5f,
-40.5f);
canvas->drawRect(rect, paints[p]);
canvas->restore();
canvas->translate(dx, 0);
canvas->save();
matrix.setScale(2.1f, 4.1f);
canvas->concat(matrix);
rect = SkRect::MakeLTRB(0.1f,
0.1f,
19.1f,
9.1f);
canvas->drawRect(rect, paints[p]);
canvas->restore();
canvas->translate(dx, 0);
canvas->restore();
canvas->translate(0, dy);
}
}
}
}
private:
int fWidth;
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new AARectView; }
static SkViewRegister reg(MyFactory);
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