зеркало из https://github.com/mozilla/moz-skia.git
139 строки
4.4 KiB
C++
139 строки
4.4 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 "SampleCode.h"
|
|
#include "SkBlurMaskFilter.h"
|
|
#include "SkColorPriv.h"
|
|
#include "SkGradientShader.h"
|
|
#include "SkView.h"
|
|
#include "SkCanvas.h"
|
|
#include "SkUtils.h"
|
|
|
|
static SkBitmap make_bitmap() {
|
|
SkBitmap bm;
|
|
SkColorTable* ctable = new SkColorTable(256);
|
|
|
|
SkPMColor* c = ctable->lockColors();
|
|
for (int i = 0; i < 256; i++) {
|
|
c[i] = SkPackARGB32(255 - i, 0, 0, 0);
|
|
}
|
|
ctable->unlockColors(true);
|
|
bm.setConfig(SkBitmap::kIndex8_Config, 256, 256);
|
|
bm.allocPixels(ctable);
|
|
ctable->unref();
|
|
|
|
bm.lockPixels();
|
|
const float cx = bm.width() * 0.5f;
|
|
const float cy = bm.height() * 0.5f;
|
|
for (int y = 0; y < bm.height(); y++) {
|
|
float dy = y - cy;
|
|
dy *= dy;
|
|
uint8_t* p = bm.getAddr8(0, y);
|
|
for (int x = 0; x < 256; x++) {
|
|
float dx = x - cx;
|
|
dx *= dx;
|
|
float d = (dx + dy) / (cx/2);
|
|
int id = (int)d;
|
|
if (id > 255) {
|
|
id = 255;
|
|
}
|
|
p[x] = id;
|
|
}
|
|
}
|
|
bm.unlockPixels();
|
|
return bm;
|
|
}
|
|
|
|
class BlurView : public SampleView {
|
|
SkBitmap fBM;
|
|
public:
|
|
BlurView() {
|
|
}
|
|
|
|
protected:
|
|
// overrides from SkEventSink
|
|
virtual bool onQuery(SkEvent* evt) {
|
|
if (SampleCode::TitleQ(*evt)) {
|
|
SampleCode::TitleR(evt, "Blur");
|
|
return true;
|
|
}
|
|
return this->INHERITED::onQuery(evt);
|
|
}
|
|
|
|
void drawBG(SkCanvas* canvas) {
|
|
canvas->drawColor(0xFFDDDDDD);
|
|
}
|
|
|
|
virtual void onDrawContent(SkCanvas* canvas) {
|
|
drawBG(canvas);
|
|
|
|
SkBlurMaskFilter::BlurStyle NONE = SkBlurMaskFilter::BlurStyle(-999);
|
|
static const struct {
|
|
SkBlurMaskFilter::BlurStyle fStyle;
|
|
int fCx, fCy;
|
|
} gRecs[] = {
|
|
{ NONE, 0, 0 },
|
|
{ SkBlurMaskFilter::kInner_BlurStyle, -1, 0 },
|
|
{ SkBlurMaskFilter::kNormal_BlurStyle, 0, 1 },
|
|
{ SkBlurMaskFilter::kSolid_BlurStyle, 0, -1 },
|
|
{ SkBlurMaskFilter::kOuter_BlurStyle, 1, 0 },
|
|
};
|
|
|
|
SkPaint paint;
|
|
paint.setAntiAlias(true);
|
|
paint.setTextSize(25);
|
|
canvas->translate(-40, 0);
|
|
|
|
SkBlurMaskFilter::BlurFlags flags = SkBlurMaskFilter::kNone_BlurFlag;
|
|
for (int j = 0; j < 2; j++) {
|
|
canvas->save();
|
|
paint.setColor(SK_ColorBLUE);
|
|
for (size_t i = 0; i < SK_ARRAY_COUNT(gRecs); i++) {
|
|
if (gRecs[i].fStyle != NONE) {
|
|
SkMaskFilter* mf = SkBlurMaskFilter::Create(20,
|
|
gRecs[i].fStyle,
|
|
flags);
|
|
paint.setMaskFilter(mf)->unref();
|
|
} else {
|
|
paint.setMaskFilter(NULL);
|
|
}
|
|
canvas->drawCircle(200 + gRecs[i].fCx*100.f,
|
|
200 + gRecs[i].fCy*100.f, 50, paint);
|
|
}
|
|
// draw text
|
|
{
|
|
SkMaskFilter* mf = SkBlurMaskFilter::Create(4,
|
|
SkBlurMaskFilter::kNormal_BlurStyle,
|
|
flags);
|
|
paint.setMaskFilter(mf)->unref();
|
|
SkScalar x = SkIntToScalar(70);
|
|
SkScalar y = SkIntToScalar(400);
|
|
paint.setColor(SK_ColorBLACK);
|
|
canvas->drawText("Hamburgefons Style", 18, x, y, paint);
|
|
canvas->drawText("Hamburgefons Style", 18, x, y + SkIntToScalar(50), paint);
|
|
paint.setMaskFilter(NULL);
|
|
paint.setColor(SK_ColorWHITE);
|
|
x -= SkIntToScalar(2);
|
|
y -= SkIntToScalar(2);
|
|
canvas->drawText("Hamburgefons Style", 18, x, y, paint);
|
|
}
|
|
canvas->restore();
|
|
flags = SkBlurMaskFilter::kHighQuality_BlurFlag;
|
|
canvas->translate(350, 0);
|
|
}
|
|
}
|
|
|
|
private:
|
|
typedef SkView INHERITED;
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static SkView* MyFactory() { return new BlurView; }
|
|
static SkViewRegister reg(MyFactory);
|
|
|