skia2/gm/strokerects.cpp
commit-bot@chromium.org e0e7cfe44b Change old PRG to be SkLCGRandom; change new one to SkRandom
The goal here is to get people to start using the new random number
generator, while leaving the old one in place so we don't have to 
rebaseline GMs.

R=reed@google.com, bsalomon@google.com

Author: jvanverth@google.com

Review URL: https://chromiumcodereview.appspot.com/23576015

git-svn-id: http://skia.googlecode.com/svn/trunk@11169 2bbb7eff-a529-9590-31e7-b0007b416f81
2013-09-09 20:09:12 +00:00

84 lines
2.0 KiB
C++

/*
* 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 "gm.h"
#include "SkRandom.h"
namespace skiagm {
#define W 400
#define H 400
#define N 100
static const SkScalar SW = SkIntToScalar(W);
static const SkScalar SH = SkIntToScalar(H);
class StrokeRectGM : public GM {
public:
StrokeRectGM() {}
protected:
virtual SkString onShortName() {
return SkString("strokerects");
}
virtual SkISize onISize() {
return make_isize(W*2, H*2);
}
static void rnd_rect(SkRect* r, SkLCGRandom& rand) {
SkScalar x = rand.nextUScalar1() * W;
SkScalar y = rand.nextUScalar1() * H;
SkScalar w = rand.nextUScalar1() * (W >> 2);
SkScalar h = rand.nextUScalar1() * (H >> 2);
SkScalar hoffset = rand.nextSScalar1();
SkScalar woffset = rand.nextSScalar1();
r->set(x, y, x + w, y + h);
r->offset(-w/2 + woffset, -h/2 + hoffset);
}
virtual void onDraw(SkCanvas* canvas) {
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
for (int y = 0; y < 2; y++) {
paint.setAntiAlias(!!y);
for (int x = 0; x < 2; x++) {
paint.setStrokeWidth(x * SkIntToScalar(3));
SkAutoCanvasRestore acr(canvas, true);
canvas->translate(SW * x, SH * y);
canvas->clipRect(SkRect::MakeLTRB(
SkIntToScalar(2), SkIntToScalar(2)
, SW - SkIntToScalar(2), SH - SkIntToScalar(2)
));
SkLCGRandom rand;
for (int i = 0; i < N; i++) {
SkRect r;
rnd_rect(&r, rand);
canvas->drawRect(r, paint);
}
}
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new StrokeRectGM; }
static GMRegistry reg(MyFactory);
}