C++ SkRect::setXYWH方法代码示例

static sk_sp<SkImage> make_image(SkCanvas* root, SkIRect* center) {
    const int kFixed = 28;
    const int kStretchy = 8;
    const int kSize = 2*kFixed + kStretchy;

    SkAutoTUnref<SkSurface> surface(make_surface(root, kSize));
    SkCanvas* canvas = surface->getCanvas();

    SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
    const SkScalar strokeWidth = SkIntToScalar(6);
    const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2;

    center->setXYWH(kFixed, kFixed, kStretchy, kStretchy);

    SkPaint paint;
    paint.setAntiAlias(true);

    paint.setColor(0xFFFF0000);
    canvas->drawRoundRect(r, radius, radius, paint);
    r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize));
    paint.setColor(0x8800FF00);
    canvas->drawRect(r, paint);
    r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy));
    paint.setColor(0x880000FF);
    canvas->drawRect(r, paint);

    return surface->makeImageSnapshot();
}

static void make_bitmap(SkBitmap* bitmap, SkIRect* center) {
    const int kFixed = 28;
    const int kStretchy = 8;
    const int kSize = 2*kFixed + kStretchy;

    bitmap->allocN32Pixels(kSize, kSize);
    SkCanvas canvas(*bitmap);
    canvas.clear(SK_ColorTRANSPARENT);

    SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
    const SkScalar strokeWidth = SkIntToScalar(6);
    const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2;

    center->setXYWH(kFixed, kFixed, kStretchy, kStretchy);

    SkPaint paint;
    paint.setAntiAlias(true);

    paint.setColor(0xFFFF0000);
    canvas.drawRoundRect(r, radius, radius, paint);
    r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize));
    paint.setColor(0x8800FF00);
    canvas.drawRect(r, paint);
    r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy));
    paint.setColor(0x880000FF);
    canvas.drawRect(r, paint);
}

static void show_stroke(SkCanvas* canvas, bool doAA, SkScalar strokeWidth, int n) {
    SkRandom rand;
    SkPaint paint;
    paint.setAntiAlias(doAA);
    paint.setStyle(SkPaint::kStroke_Style);
    paint.setStrokeWidth(strokeWidth);
    
    for (int i = 0; i < n; ++i) {
        SkRect r;
        SkPath p;
        
        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
        paint.setColor(rand.nextU());
        canvas->drawRect(r, paint);
        
        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
        paint.setColor(rand.nextU());
        p.addOval(r);
        canvas->drawPath(p, paint);

        const SkScalar minx = -SkIntToScalar(W)/4;
        const SkScalar maxx = 5*SkIntToScalar(W)/4;
        const SkScalar miny = -SkIntToScalar(H)/4;
        const SkScalar maxy = 5*SkIntToScalar(H)/4;
        paint.setColor(rand.nextU());
        canvas->drawLine(randRange(rand, minx, maxx), randRange(rand, miny, maxy),
                         randRange(rand, minx, maxx), randRange(rand, miny, maxy),
                         paint);
    }
}

    virtual void onDrawContent(SkCanvas* canvas) {
        SkIRect srcRect;
        SkRect dstRect;
        SkPaint paint;
        paint.setFilterBitmap(true);

        // Test that bitmap draws from malloc-backed bitmaps respect
        // the constrained texture domain.
        srcRect.setXYWH(1, 1, 3, 3);
        dstRect.setXYWH(5.0f, 5.0f, 305.0f, 305.0f);
        canvas->drawBitmapRect(fBM, &srcRect, dstRect, &paint);

        // Test that bitmap draws across separate devices also respect
        // the constrainted texture domain.
        // Note:  GPU-backed bitmaps follow a different rendering path
        // when copying from one GPU device to another.
        SkAutoTUnref<SkDevice> secondDevice(canvas->createCompatibleDevice(
                SkBitmap::kARGB_8888_Config, 5, 5, true));
        SkCanvas secondCanvas(secondDevice.get());

        srcRect.setXYWH(1, 1, 3, 3);
        dstRect.setXYWH(1.0f, 1.0f, 3.0f, 3.0f);
        secondCanvas.drawBitmapRect(fBM, &srcRect, dstRect, &paint);

        SkBitmap deviceBitmap = secondDevice->accessBitmap(false);

        srcRect.setXYWH(1, 1, 3, 3);
        dstRect.setXYWH(405.0f, 5.0f, 305.0f, 305.0f);
        canvas->drawBitmapRect(deviceBitmap, &srcRect, dstRect, &paint);

        // Test that bitmap blurring using a subrect
        // renders correctly
        srcRect.setXYWH(1, 1, 3, 3);
        dstRect.setXYWH(5.0f, 405.0f, 305.0f, 305.0f);
        SkMaskFilter* mf = SkBlurMaskFilter::Create(
            5,
            SkBlurMaskFilter::kNormal_BlurStyle,
            SkBlurMaskFilter::kHighQuality_BlurFlag |
            SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
        paint.setMaskFilter(mf)->unref();
        canvas->drawBitmapRect(deviceBitmap, &srcRect, dstRect, &paint);

        // Blur and a rotation + NULL src rect
        // This should not trigger the texture domain code
        // but it will test a code path in SkGpuDevice::drawBitmap
        // that handles blurs with rects transformed to non-
        // orthogonal rects. It also tests the NULL src rect handling
    mf = SkBlurMaskFilter::Create(
            5,
            SkBlurMaskFilter::kNormal_BlurStyle,
            SkBlurMaskFilter::kHighQuality_BlurFlag);
        paint.setMaskFilter(mf)->unref();

        dstRect.setXYWH(-150.0f, -150.0f, 300.0f, 300.0f);
        canvas->translate(550, 550);
        canvas->rotate(45);
        canvas->drawBitmapRect(fBM, NULL, dstRect, &paint);
    }

 void onSizeChange() override {
     fWeightControl.setXYWH(this->width() - 150, 30, 30, 400);
     fErrorControl.setXYWH(this->width() - 100, 30, 30, 400);
     fWidthControl.setXYWH(this->width() -  50, 30, 30, 400);
     int buttonOffset = 450;
     fCubicButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
     buttonOffset += 50;
     fConicButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
     buttonOffset += 50;
     fQuadButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
     buttonOffset += 50;
     fRRectButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
     buttonOffset += 50;
     fCircleButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
     buttonOffset += 50;
     fTextButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
     this->INHERITED::onSizeChange();
 }

    virtual void onDraw(SkCanvas* canvas) {
        drawBG(canvas);

        SkBitmap sprite;
        sprite.setConfig(SkBitmap::kARGB_8888_Config, 4, 4, 4*sizeof(SkColor));
        const SkColor spriteData[16] = {
            SK_ColorBLACK,  SK_ColorCYAN,    SK_ColorMAGENTA, SK_ColorYELLOW,
            SK_ColorBLACK,  SK_ColorWHITE,   SK_ColorBLACK,   SK_ColorRED,
            SK_ColorGREEN,  SK_ColorBLACK,   SK_ColorWHITE,   SK_ColorBLUE,
            SK_ColorYELLOW, SK_ColorMAGENTA, SK_ColorCYAN,    SK_ColorBLACK
        };
        sprite.allocPixels();
        sprite.lockPixels();
        SkPMColor* addr = sprite.getAddr32(0, 0);
        for (size_t i = 0; i < SK_ARRAY_COUNT(spriteData); ++i) {
            addr[i] = SkPreMultiplyColor(spriteData[i]);
        }
        sprite.unlockPixels();

        // We draw a magnified subrect of the sprite
        // sample interpolation may cause color bleeding around edges
        // the subrect is a pure white area
        SkIRect srcRect;
        SkRect dstRect;
        SkPaint paint;
        paint.setFilterBitmap(true);
        //First row : full texture with and without filtering
        srcRect.setXYWH(0, 0, 4, 4);
        dstRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0)
                        , SkIntToScalar(100), SkIntToScalar(100));
        canvas->drawBitmapRect(sprite, &srcRect, dstRect, &paint);
        dstRect.setXYWH(SkIntToScalar(100), SkIntToScalar(0)
                        , SkIntToScalar(100), SkIntToScalar(100));
        canvas->drawBitmapRect(sprite, &srcRect, dstRect);
        //Second row : sub rect of texture with and without filtering
        srcRect.setXYWH(1, 1, 2, 2);
        dstRect.setXYWH(SkIntToScalar(25), SkIntToScalar(125)
                        , SkIntToScalar(50), SkIntToScalar(50));
        canvas->drawBitmapRect(sprite, &srcRect, dstRect, &paint);
        dstRect.setXYWH(SkIntToScalar(125), SkIntToScalar(125)
                        , SkIntToScalar(50), SkIntToScalar(50));
        canvas->drawBitmapRect(sprite, &srcRect, dstRect);
    }

static void make_bitmap(SkBitmap* bitmap, GrContext* ctx, SkIRect* center) {
    SkDevice* dev;
    SkCanvas canvas;

    const int kFixed = 28;
    const int kStretchy = 8;
    const int kSize = 2*kFixed + kStretchy;

#if SK_SUPPORT_GPU
    if (ctx) {
        dev = new SkGpuDevice(ctx, SkBitmap::kARGB_8888_Config, kSize, kSize);
        *bitmap = dev->accessBitmap(false);
    } else
#endif
    {
        bitmap->setConfig(SkBitmap::kARGB_8888_Config, kSize, kSize);
        bitmap->allocPixels();
        dev = new SkDevice(*bitmap);
    }

    canvas.setDevice(dev)->unref();
    canvas.clear(0);

    SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
    const SkScalar strokeWidth = SkIntToScalar(6);
    const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2;

    center->setXYWH(kFixed, kFixed, kStretchy, kStretchy);

    SkPaint paint;
    paint.setAntiAlias(true);

    paint.setColor(0xFFFF0000);
    canvas.drawRoundRect(r, radius, radius, paint);
    r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize));
    paint.setColor(0x8800FF00);
    canvas.drawRect(r, paint);
    r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy));
    paint.setColor(0x880000FF);
    canvas.drawRect(r, paint);
}

static void show_fill(SkCanvas* canvas, bool doAA) {
    SkRandom rand;
    SkPaint paint;
    paint.setAntiAlias(doAA);
    
    for (int i = 0; i < 50; ++i) {
        SkRect r;
        SkPath p;
        
        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
        paint.setColor(rand.nextU());
        canvas->drawRect(r, paint);
        
        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
        paint.setColor(rand.nextU());
        p.addOval(r);
        canvas->drawPath(p, paint);
    }
}

static void TestDeferredCanvasFreshFrame(skiatest::Reporter* reporter) {
    SkBitmap store;
    SkRect fullRect;
    fullRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(gWidth),
        SkIntToScalar(gHeight));
    SkRect partialRect;
    partialRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0),
        SkIntToScalar(1), SkIntToScalar(1));
    create(&store, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
    SkDevice device(store);
    SkDeferredCanvas canvas(&device);

    // verify that frame is intially fresh
    REPORTER_ASSERT(reporter, canvas.getDeferredDevice()->isFreshFrame());
    // no clearing op since last call to isFreshFrame -> not fresh
    REPORTER_ASSERT(reporter, !canvas.getDeferredDevice()->isFreshFrame());

    // Verify that clear triggers a fresh frame
    canvas.clear(0x00000000);
    REPORTER_ASSERT(reporter, canvas.getDeferredDevice()->isFreshFrame());

    // Verify that clear with saved state triggers a fresh frame
    canvas.save(SkCanvas::kMatrixClip_SaveFlag);
    canvas.clear(0x00000000);
    canvas.restore();
    REPORTER_ASSERT(reporter, canvas.getDeferredDevice()->isFreshFrame());

    // Verify that clear within a layer does NOT trigger a fresh frame
    canvas.saveLayer(NULL, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag);
    canvas.clear(0x00000000);
    canvas.restore();
    REPORTER_ASSERT(reporter, !canvas.getDeferredDevice()->isFreshFrame());

    // Verify that a clear with clipping triggers a fresh frame
    // (clear is not affected by clipping)
    canvas.save(SkCanvas::kMatrixClip_SaveFlag);
    canvas.clipRect(partialRect, SkRegion::kIntersect_Op, false);
    canvas.clear(0x00000000);
    canvas.restore();
    REPORTER_ASSERT(reporter, canvas.getDeferredDevice()->isFreshFrame());    

    // Verify that full frame rects with different forms of opaque paint
    // trigger frames to be marked as fresh
    {
        SkPaint paint;
        paint.setStyle( SkPaint::kFill_Style );
        paint.setAlpha( 255 );
        canvas.drawRect(fullRect, paint);
        REPORTER_ASSERT(reporter, canvas.getDeferredDevice()->isFreshFrame());
    }
    {
        SkPaint paint;
        paint.setStyle( SkPaint::kFill_Style );
        SkBitmap bmp;
        create(&bmp, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
        bmp.setIsOpaque(true);
        SkShader* shader = SkShader::CreateBitmapShader(bmp, 
            SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
        paint.setShader(shader)->unref();
        canvas.drawRect(fullRect, paint);
        REPORTER_ASSERT(reporter, canvas.getDeferredDevice()->isFreshFrame());        
    }

    // Verify that full frame rects with different forms of non-opaque paint
    // do not trigger frames to be marked as fresh
    {
        SkPaint paint;
        paint.setStyle( SkPaint::kFill_Style );
        paint.setAlpha( 254 );
        canvas.drawRect(fullRect, paint);
        REPORTER_ASSERT(reporter, !canvas.getDeferredDevice()->isFreshFrame());
    }
    {
        SkPaint paint;
        paint.setStyle( SkPaint::kFill_Style );
        SkBitmap bmp;
        create(&bmp, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
        bmp.setIsOpaque(false);
        SkShader* shader = SkShader::CreateBitmapShader(bmp, 
            SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
        paint.setShader(shader)->unref();
        canvas.drawRect(fullRect, paint);
        REPORTER_ASSERT(reporter, !canvas.getDeferredDevice()->isFreshFrame());        
    }

    // Verify that incomplete coverage does not trigger a fresh frame
    {
        SkPaint paint;
        paint.setStyle(SkPaint::kFill_Style);
        paint.setAlpha(255);
        canvas.drawRect(partialRect, paint);
        REPORTER_ASSERT(reporter, !canvas.getDeferredDevice()->isFreshFrame());
    }

    // Verify that incomplete coverage due to clipping does not trigger a fresh
    // frame
    {
        canvas.save(SkCanvas::kMatrixClip_SaveFlag);
        canvas.clipRect(partialRect, SkRegion::kIntersect_Op, false);
        SkPaint paint;
//.........这里部分代码省略.........

static void drawInBitmap(SkBitmap &bitmap)
{
    
    SkCanvas canvas(bitmap);
    canvas.clear(SK_ColorWHITE);
    
    SkPaint myPaint;
    myPaint.setAntiAlias(true);
    myPaint.setColor(SK_ColorBLACK);
    myPaint.setStrokeWidth(SkIntToScalar(1));
    
    canvas.translate(SkIntToScalar(36), SkIntToScalar(36));
    
    canvas.scale(SkIntToScalar(1), SkIntToScalar(-1));
    canvas.scale(SkDoubleToScalar(0.17), SkDoubleToScalar(0.17));
    
    {
        SkPoint linearPoints[] = {
            {SkIntToScalar(-58), SkIntToScalar(13)},
            {SkIntToScalar(-58+(116/2)), SkIntToScalar(13)}
        };
        SkColor linearColors[] = {SK_ColorBLACK, SK_ColorLTGRAY};
        SkShader* shader = SkGradientShader::CreateLinear(
                                                          linearPoints, linearColors, NULL, 2,
                                                          SkShader::kMirror_TileMode);
        SkAutoUnref shader_deleter(shader);
        myPaint.setShader(shader);
        myPaint.setFlags(SkPaint::kAntiAlias_Flag);
        
        SkRect rect0;
        rect0.setXYWH(SkIntToScalar(-58), SkIntToScalar(13), SkIntToScalar(116), SkIntToScalar(76));
        canvas.drawRect(rect0,myPaint);

        // Detach shader
        myPaint.setShader(NULL);
    }
    myPaint.setColor(SK_ColorBLACK);
    myPaint.setStyle(SkPaint::kStrokeAndFill_Style);
    
    SkRect rect;
    rect.setXYWH(SkIntToScalar(-60), SkIntToScalar(75), SkIntToScalar(120), SkIntToScalar(6));
    
    canvas.drawRect(rect, myPaint);
    
    SkRect rect1;
    rect1.setXYWH(SkIntToScalar(-60), SkIntToScalar(61), SkIntToScalar(120), SkIntToScalar(6));
    canvas.drawRect(rect1, myPaint);

    SkRect rect2;
    rect2.setXYWH(SkIntToScalar(-60), SkIntToScalar(49), SkIntToScalar(120), SkIntToScalar(6));
    canvas.drawRect(rect2, myPaint);

    SkPoint pts0[] = {
        {-60,11},
        {-42,23},
        {38,23},
        {56,11},
        {-60,11}
    };
    
    myPaint.setColor(SK_ColorBLUE);
    myPaint.setStyle(SkPaint::kStroke_Style);
    SkPath path0;
    path0.addPoly(pts0, 5, true);
    
    canvas.drawPath(path0, myPaint);
    
    path0.addPoly(pts0, 5, true);
    myPaint.setColor(SK_ColorWHITE);
    myPaint.setStyle(SkPaint::kFill_Style);
    canvas.drawPath(path0, myPaint);


    myPaint.setColor(SK_ColorBLACK);

    
    myPaint.setStyle(SkPaint::kStroke_Style);

    canvas.drawLine(SkIntToScalar(-100), SkIntToScalar(-90), SkIntToScalar(100), SkIntToScalar(-91), myPaint);
    
    canvas.drawLine(SkIntToScalar(0), SkIntToScalar(-90), SkIntToScalar(26), SkIntToScalar(-58), myPaint);
    
    canvas.drawLine(SkIntToScalar(26), SkIntToScalar(-58), SkIntToScalar(-2), SkIntToScalar(37), myPaint);
    
    myPaint.setStyle(SkPaint::kStrokeAndFill_Style);

    canvas.drawCircle(SkIntToScalar(0), SkIntToScalar(33), SkIntToScalar(4), myPaint);

    myPaint.setStyle(SkPaint::kStroke_Style);

    canvas.drawCircle(SkDoubleToScalar(0), SkDoubleToScalar(-(129+49)/2), SkIntToScalar(40), myPaint);
    
    myPaint.setColor(SK_ColorLTGRAY);
    myPaint.setStyle(SkPaint::kStrokeAndFill_Style);
    SkPoint pts[9];
    pts[0].set(-60, -50);
    pts[1].set(-60, 100);
    pts[2].set( 60, 100);
    pts[3].set(60, -52);
    pts[4].set(100, -52);
//.........这里部分代码省略.........