C++ SkRect::set方法代码示例

static inline void getSkiaBoundsForGlyph(SkPaint& paint, Glyph glyph, SkRect& bounds)
{
    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);

    SkPath path;
    paint.getTextPath(&glyph, sizeof(glyph), 0, 0, &path);
    bounds = path.getBounds();

    if (!paint.isSubpixelText()) {
        SkIRect ir;
        bounds.round(&ir);
        bounds.set(ir);
    }
}

    void onDraw(SkCanvas* canvas) override {
        createShader();
        createMaskFilter();

        canvas->save();

        // draw a letter "M" with a green & red striped texture and a
        // stipple mask with a round rect soft clip
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setTextSize(72);
        paint.setShader(fShader.get());
        paint.setMaskFilter(fMaskFilter.get());
        sk_tool_utils::set_portable_typeface(&paint);

        SkRect temp;
        temp.set(SkIntToScalar(115),
                 SkIntToScalar(75),
                 SkIntToScalar(144),
                 SkIntToScalar(110));

        SkPath path;
        path.addRoundRect(temp, SkIntToScalar(5), SkIntToScalar(5));

        canvas->clipPath(path, SkRegion::kReplace_Op, true); // AA is on

        canvas->drawText("M", 1,
                         SkIntToScalar(100), SkIntToScalar(100),
                         paint);

        canvas->restore();

        // Now draw stroked versions of the "M" and the round rect so we can
        // see what is going on
        SkPaint paint2;
        paint2.setColor(SK_ColorBLACK);
        paint2.setAntiAlias(true);
        paint2.setTextSize(72);
        paint2.setStyle(SkPaint::kStroke_Style);
        paint2.setStrokeWidth(1);
        sk_tool_utils::set_portable_typeface(&paint2);
        canvas->drawText("M", 1,
                         SkIntToScalar(100), SkIntToScalar(100),
                         paint2);

        paint2.setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));

        canvas->drawPath(path, paint2);
    }

void Path::addArc(const FloatPoint& p, float r, float sa, float ea,
                  bool clockwise) {
    SkScalar    cx = SkFloatToScalar(p.x());
    SkScalar    cy = SkFloatToScalar(p.y());
    SkScalar    radius = SkFloatToScalar(r);

    SkRect  oval;
    oval.set(cx - radius, cy - radius, cx + radius, cy + radius);
    
    float sweep = ea - sa;
    bool prependOval = false;

    /*  Note if clockwise and the sign of the sweep disagree. This particular
        logic was deduced from http://canvex.lazyilluminati.com/misc/arc.html
    */
    if (clockwise && (sweep > 0 || sweep < -g2PI)) {
        sweep = fmodf(sweep, g2PI) - g2PI;
    } else if (!clockwise && (sweep < 0 || sweep > g2PI)) {
        sweep = fmodf(sweep, g2PI) + g2PI;
    }
    
    // If the abs(sweep) >= 2PI, then we need to add a circle before we call
    // arcTo, since it treats the sweep mod 2PI. We don't have a prepend call,
    // so we just remember this, and at the end create a new path with an oval
    // and our current path, and then swap then.
    //
    if (sweep >= g2PI || sweep <= -g2PI) {
        prependOval = true;
//        SkDebugf("addArc sa=%g ea=%g cw=%d sweep %g treat as circle\n", sa, ea, clockwise, sweep);

        // now reduce sweep to just the amount we need, so that the current
        // point is left where the caller expects it.
        sweep = fmodf(sweep, g2PI);
    }

    sa = fast_mod(sa, g2PI);
    SkScalar startDegrees = SkFloatToScalar(sa * g180OverPI);
    SkScalar sweepDegrees = SkFloatToScalar(sweep * g180OverPI);

//    SkDebugf("addArc sa=%g ea=%g cw=%d sweep=%g ssweep=%g\n", sa, ea, clockwise, sweep, SkScalarToFloat(sweepDegrees));
    m_path->arcTo(oval, startDegrees, sweepDegrees, false);
    
    if (prependOval) {
        SkPath tmp;
        tmp.addOval(oval);
        tmp.addPath(*m_path);
        m_path->swap(tmp);
    }
}

void SkDebugCanvas::drawTo(SkCanvas* canvas, int index) {
    int counter = 0;
    SkASSERT(!fCommandVector.isEmpty());
    SkASSERT(index < fCommandVector.count());
    int i;

    // This only works assuming the canvas and device are the same ones that
    // were previously drawn into because they need to preserve all saves
    // and restores.
    if (fIndex < index) {
        i = fIndex + 1;
    } else {
        for (int j = 0; j < fOutstandingSaveCount; j++) {
            canvas->restore();
        }
        i = 0;
        canvas->clear(SK_ColorTRANSPARENT);
        canvas->resetMatrix();
        SkRect rect = SkRect::MakeWH(SkIntToScalar(fWidth),
                                     SkIntToScalar(fHeight));
        canvas->clipRect(rect, SkRegion::kReplace_Op );
        applyUserTransform(canvas);
        fOutstandingSaveCount = 0;
    }

    for (; i <= index; i++) {
        if (i == index && fFilter) {
            SkPaint p;
            p.setColor(0xAAFFFFFF);
            canvas->save();
            canvas->resetMatrix();
            SkRect mask;
            mask.set(SkIntToScalar(0), SkIntToScalar(0),
                    SkIntToScalar(fWidth), SkIntToScalar(fHeight));
            canvas->clipRect(mask, SkRegion::kReplace_Op, false);
            canvas->drawRectCoords(SkIntToScalar(0), SkIntToScalar(0),
                    SkIntToScalar(fWidth), SkIntToScalar(fHeight), p);
            canvas->restore();
        }

        if (fCommandVector[i]->isVisible()) {
            fCommandVector[i]->execute(canvas);
            fCommandVector[i]->trackSaveState(&fOutstandingSaveCount);
        }
    }
    fMatrix = canvas->getTotalMatrix();
    fClip = canvas->getTotalClip().getBounds();
    fIndex = index;
}

    void drawOrig(SkCanvas* canvas, bool bg) {
        SkRect      r;
        SkPaint     paint;

        paint.setStyle(SkPaint::kStroke_Style);
        if (bg)
            paint.setColor(0xFFBBBBBB);

        SkRegion rgn;
        build_base_rgn(&rgn);
        paint_rgn(canvas, rgn, paint);

        r.set(fRect);
        canvas->drawRect(r, paint);
    }

static void paint_rgn(SkCanvas* canvas, const SkRegion& rgn,
                      const SkPaint& paint)
    {
    SkRegion scaled;
    scale_rgn(&scaled, rgn, 0.5f);

    SkRegion::Iterator  iter(rgn);

    for (; !iter.done(); iter.next())
        {
        SkRect    r;
        r.set(iter.rect());
        canvas->drawRect(r, paint);
        }
    }

void EmojiFont::Draw(SkCanvas* canvas, uint16_t glyphID,
                     SkScalar x, SkScalar y, const SkPaint& paint) {
    if (glyphID < kGlyphBase) {
        SkDebugf("-------- bad glyph passed to EmojiFont::Draw %d\n", glyphID);
    }

    const SkBitmap* bitmap = get_bitmap(glyphID - kGlyphBase);
    if (bitmap && !bitmap->empty()) {
        SkRect dst;
        SkScalar size = paint.getTextSize();
        y += SkScalarMul(size, gBaselinePercentDrop);
        dst.set(x, y - size, x + size, y);
        canvas->drawBitmapRect(*bitmap, NULL, dst, &paint);
    }
}

void SkSliderView::onDraw(SkCanvas* canvas)
{
	this->INHERITED::onDraw(canvas);

	U16CPU value = SkMax32(0, SkMin32(fValue, fMax));

	SkRect	r;
	SkPaint	p;

	r.set(0, 0, this->width(), this->height());

	p.setAntiAliasOn(true);
	p.setStyle(SkPaint::kStroke_Style);
	p.setStrokeWidth(SK_Scalar1);
	r.inset(SK_Scalar1/2, SK_Scalar1/2);
	canvas->drawRect(r, p);

	if (fMax)
	{
		SkFixed percent = SkFixedDiv(value, fMax);
		
		r.inset(SK_Scalar1/2, SK_Scalar1/2);
		r.fRight = r.fLeft + SkScalarMul(r.width(), SkFixedToScalar(percent));
		p.setStyle(SkPaint::kFill_Style);
		setgrad(&p, r);
		canvas->drawRect(r, p);
	}

#if 0
	r.set(0, 0, this->width(), this->height());
	r.inset(SK_Scalar1, SK_Scalar1);
	r.inset(r.width()/2, 0);
	p.setColor(SK_ColorBLACK);
	canvas->drawLine(*(SkPoint*)&r.fLeft, *(SkPoint*)&r.fRight, p);
#endif
}

PathTexture* OvalShapeCache::getOval(float width, float height, SkPaint* paint) {
    OvalShapeCacheEntry entry(width, height, paint);
    PathTexture* texture = get(entry);

    if (!texture) {
        SkPath path;
        SkRect r;
        r.set(0.0f, 0.0f, width, height);
        path.addOval(r, SkPath::kCW_Direction);

        texture = addTexture(entry, &path, paint);
    }

    return texture;
}

    void onDrawContent(SkCanvas* canvas) override {
        SkRect oval = fOval;
        oval.offset(fCenter.fX - oval.centerX(), fCenter.fY - oval.centerY());

        SkPaint p;
        p.setAntiAlias(true);

        p.setStyle(SkPaint::kStroke_Style);
        canvas->drawOval(oval, p);

        SkRect r;
        r.set(SkIntToScalar(200), SkIntToScalar(200),
              SkIntToScalar(300), SkIntToScalar(300));
        canvas->clipRect(r);

        p.setStyle(SkPaint::kFill_Style);
        p.setColor(SK_ColorRED);
        canvas->drawRect(r, p);

        p.setColor(0x800000FF);
        r.set(SkIntToScalar(150), SkIntToScalar(10),
              SkIntToScalar(250), SkIntToScalar(400));
        canvas->drawOval(oval, p);
    }

void roundRect(SkCanvas *canvas, SkIRect irect, SkColor color)
{
    SkRect rect;
    SkScalar radius = SkIntToScalar(5);
    SkPaint paint;

    rect.set(irect);
    paint.setColor(color);
    paint.setStyle(SkPaint::kFill_Style);
    canvas->drawRoundRect(rect, radius, radius, paint);

    paint.setColor(edgeColor);
    paint.setStyle(SkPaint::kStroke_Style);
    canvas->drawRoundRect(rect, radius, radius, paint);
}

 /*
  0x1F * x + 0x1F * (32 - x)
  */
 void drawRings(SkCanvas* canvas) {
     canvas->scale(SkIntToScalar(1)/2, SkIntToScalar(1)/2);
     
     SkRect  r;        
     SkScalar x = SkIntToScalar(10);
     SkScalar y = SkIntToScalar(10);
     r.set(x, y, x + SkIntToScalar(100), y + SkIntToScalar(100));
     
     SkPaint paint;
  //   paint.setAntiAlias(true);
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3)));
     paint.setColor(0xFFFF8800);
  //   paint.setColor(0xFFFFFFFF);
     canvas->drawRect(r, paint);
 }

PathTexture* RoundRectShapeCache::getRoundRect(float width, float height,
        float rx, float ry, SkPaint* paint) {
    RoundRectShapeCacheEntry entry(width, height, rx, ry, paint);
    PathTexture* texture = get(entry);

    if (!texture) {
        SkPath path;
        SkRect r;
        r.set(0.0f, 0.0f, width, height);
        path.addRoundRect(r, rx, ry, SkPath::kCW_Direction);

        texture = addTexture(entry, &path, paint);
    }

    return texture;
}

    BitmapRectView() {
        this->setBGColor(SK_ColorGRAY);

        this->resetBounce();

        fSrcLimit.set(-SCALAR_SIZE/4, -SCALAR_SIZE/4,
                      SCALAR_SIZE*5/4, SCALAR_SIZE*5/4);

        fDstR[0] = SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(100),
                                       SkIntToScalar(250), SkIntToScalar(300));
        fDstR[1] = fDstR[0];
        fDstR[1].offset(fDstR[0].width() * 5/4, 0);

        fSrcPts[0].set(32, 32);
        fSrcPts[1].set(90, 90);
    }

    void onDraw(SkCanvas* canvas) override {
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setLCDRenderText(true);
        SkAutoTUnref<SkFontMgr> fontMgr(SkFontMgr::RefDefault());

        SkAutoTDelete<SkStreamAsset> distortable(GetResourceAsStream("/fonts/Distortable.ttf"));
        if (!distortable) {
            return;
        }
        const char* text = "abc";
        const size_t textLen = strlen(text);

        for (int j = 0; j < 2; ++j) {
            for (int i = 0; i < 5; ++i) {
                SkScalar x = SkIntToScalar(10);
                SkScalar y = SkIntToScalar(20);

                SkFourByteTag tag = SkSetFourByteTag('w','g','h','t');
                SkScalar styleValue = SkDoubleToScalar(0.5 + (5*j + i) * ((2.0 - 0.5) / (2 * 5)));
                SkFontMgr::FontParameters::Axis axes[] = { { tag, styleValue } };
                paint.setTypeface(sk_sp<SkTypeface>(fontMgr->createFromStream(
                        distortable->duplicate(), SkFontMgr::FontParameters().setAxes(axes, 1))));

                SkAutoCanvasRestore acr(canvas, true);
                canvas->translate(SkIntToScalar(30 + i * 100), SkIntToScalar(20));
                rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);

                {
                    SkPaint p;
                    p.setAntiAlias(true);
                    SkRect r;
                    r.set(x - SkIntToScalar(3), SkIntToScalar(15),
                          x - SkIntToScalar(1), SkIntToScalar(280));
                    canvas->drawRect(r, p);
                }

                for (int ps = 6; ps <= 22; ps++) {
                    paint.setTextSize(SkIntToScalar(ps));
                    canvas->drawText(text, textLen, x, y, paint);
                    y += paint.getFontMetrics(nullptr);
                }
            }
            canvas->translate(0, SkIntToScalar(360));
            paint.setSubpixelText(true);
        }
    }