e36ddf0131
- clamp the max. radius to 128, as the software path does
- use a more accurate radius-to-sigma conversion (0.6 instead of 0.6666)
- make SampleBlur derive from SampleView, not SkView, so benchmark mode ('f')
works
- implement a new BigBlur sample to test large radii
Review URL: http://codereview.appspot.com/4726043
git-svn-id: http://skia.googlecode.com/svn/trunk@1871 2bbb7eff-a529-9590-31e7-b0007b416f81
132 lines
4.2 KiB
C++
132 lines
4.2 KiB
C++
#include "SampleCode.h"
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#include "SkBlurMaskFilter.h"
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#include "SkColorPriv.h"
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#include "SkGradientShader.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkUtils.h"
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static SkBitmap make_bitmap() {
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SkBitmap bm;
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SkColorTable* ctable = new SkColorTable(256);
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SkPMColor* c = ctable->lockColors();
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for (int i = 0; i < 256; i++) {
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c[i] = SkPackARGB32(255 - i, 0, 0, 0);
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}
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ctable->unlockColors(true);
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bm.setConfig(SkBitmap::kIndex8_Config, 256, 256);
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bm.allocPixels(ctable);
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ctable->unref();
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bm.lockPixels();
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const float cx = bm.width() * 0.5f;
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const float cy = bm.height() * 0.5f;
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for (int y = 0; y < bm.height(); y++) {
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float dy = y - cy;
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dy *= dy;
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uint8_t* p = bm.getAddr8(0, y);
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for (int x = 0; x < 256; x++) {
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float dx = x - cx;
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dx *= dx;
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float d = (dx + dy) / (cx/2);
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int id = (int)d;
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if (id > 255) {
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id = 255;
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}
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p[x] = id;
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}
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}
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bm.unlockPixels();
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return bm;
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}
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class BlurView : public SampleView {
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SkBitmap fBM;
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public:
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BlurView() {
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "Blur");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(0xFFDDDDDD);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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drawBG(canvas);
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SkBlurMaskFilter::BlurStyle NONE = SkBlurMaskFilter::BlurStyle(-999);
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static const struct {
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SkBlurMaskFilter::BlurStyle fStyle;
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int fCx, fCy;
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} gRecs[] = {
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{ NONE, 0, 0 },
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{ SkBlurMaskFilter::kInner_BlurStyle, -1, 0 },
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{ SkBlurMaskFilter::kNormal_BlurStyle, 0, 1 },
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{ SkBlurMaskFilter::kSolid_BlurStyle, 0, -1 },
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{ SkBlurMaskFilter::kOuter_BlurStyle, 1, 0 },
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};
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setTextSize(25);
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canvas->translate(-40, 0);
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SkBlurMaskFilter::BlurFlags flags = SkBlurMaskFilter::kNone_BlurFlag;
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for (int j = 0; j < 2; j++) {
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canvas->save();
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paint.setColor(SK_ColorBLUE);
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for (size_t i = 0; i < SK_ARRAY_COUNT(gRecs); i++) {
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if (gRecs[i].fStyle != NONE) {
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SkMaskFilter* mf = SkBlurMaskFilter::Create(20,
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gRecs[i].fStyle,
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flags);
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paint.setMaskFilter(mf)->unref();
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} else {
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paint.setMaskFilter(NULL);
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}
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canvas->drawCircle(200 + gRecs[i].fCx*100.f,
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200 + gRecs[i].fCy*100.f, 50, paint);
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}
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// draw text
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{
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SkMaskFilter* mf = SkBlurMaskFilter::Create(4,
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SkBlurMaskFilter::kNormal_BlurStyle,
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flags);
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paint.setMaskFilter(mf)->unref();
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SkScalar x = SkIntToScalar(70);
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SkScalar y = SkIntToScalar(400);
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paint.setColor(SK_ColorBLACK);
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canvas->drawText("Hamburgefons Style", 18, x, y, paint);
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canvas->drawText("Hamburgefons Style", 18, x, y + SkIntToScalar(50), paint);
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paint.setMaskFilter(NULL);
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paint.setColor(SK_ColorWHITE);
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x -= SkIntToScalar(2);
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y -= SkIntToScalar(2);
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canvas->drawText("Hamburgefons Style", 18, x, y, paint);
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}
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canvas->restore();
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flags = SkBlurMaskFilter::kHighQuality_BlurFlag;
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canvas->translate(350, 0);
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}
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}
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private:
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typedef SkView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new BlurView; }
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static SkViewRegister reg(MyFactory);
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