C++ SkRect::x方法代码示例

 void draw(SkCanvas* canvas,
           const SkRect& rect,
           const SkSize& deviceSize,
           SkPaint::FilterLevel filterLevel,
           SkImageFilter* input = NULL) {
     SkRect dstRect;
     canvas->getTotalMatrix().mapRect(&dstRect, rect);
     canvas->save();
     SkScalar deviceScaleX = SkScalarDiv(deviceSize.width(), dstRect.width());
     SkScalar deviceScaleY = SkScalarDiv(deviceSize.height(), dstRect.height());
     canvas->translate(rect.x(), rect.y());
     canvas->scale(deviceScaleX, deviceScaleY);
     canvas->translate(-rect.x(), -rect.y());
     SkMatrix matrix;
     matrix.setScale(SkScalarInvert(deviceScaleX),
                     SkScalarInvert(deviceScaleY));
     SkAutoTUnref<SkImageFilter> imageFilter(
         SkMatrixImageFilter::Create(matrix, filterLevel, input));
     SkPaint filteredPaint;
     filteredPaint.setImageFilter(imageFilter.get());
     canvas->saveLayer(&rect, &filteredPaint);
     SkPaint paint;
     paint.setColor(0xFF00FF00);
     SkRect ovalRect = rect;
     ovalRect.inset(SkIntToScalar(4), SkIntToScalar(4));
     canvas->drawOval(ovalRect, paint);
     canvas->restore(); // for saveLayer
     canvas->restore();
 }

void SkDeferredCanvas::flush_translate(SkScalar* x, SkScalar* y, const SkRect& bounds,
                                       const SkPaint* paint) {
    SkRect tmp = bounds;
    this->flush_check(&tmp, paint, kNoClip_Flag | kNoScale_Flag);
    *x += tmp.x() - bounds.x();
    *y += tmp.y() - bounds.y();
}

void SkMatrixImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
    SkRect bounds = src;
    if (getInput(0)) {
        getInput(0)->computeFastBounds(src, &bounds);
    }
    SkMatrix matrix;
    matrix.setTranslate(-bounds.x(), -bounds.y());
    matrix.postConcat(fTransform);
    matrix.postTranslate(bounds.x(), bounds.y());
    matrix.mapRect(dst, bounds);
}

void SkSVGDevice::AutoElement::addRectAttributes(const SkRect& rect) {
    // x, y default to 0
    if (rect.x() != 0) {
        this->addAttribute("x", rect.x());
    }
    if (rect.y() != 0) {
        this->addAttribute("y", rect.y());
    }

    this->addAttribute("width", rect.width());
    this->addAttribute("height", rect.height());
}

void SkDeferredCanvas::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) {
    SkRect modRect = rrect.getBounds();
    this->flush_check(&modRect, &paint, kNoClip_Flag);
    fCanvas->drawRRect(make_offset(rrect,
                                   modRect.x() - rrect.getBounds().x(),
                                   modRect.y() - rrect.getBounds().y()), paint);
}

/*
 *  Test the 3 annotation types by recording them into a picture, serializing, and then playing
 *  them back into another canvas.
 */
DEF_TEST(Annotations, reporter) {
    SkPictureRecorder recorder;
    SkCanvas* recordingCanvas = recorder.beginRecording(SkRect::MakeWH(100, 100));

    const char* str0 = "rect-with-url";
    const SkRect r0 = SkRect::MakeWH(10, 10);
    sk_sp<SkData> d0(SkData::MakeWithCString(str0));
    SkAnnotateRectWithURL(recordingCanvas, r0, d0.get());

    const char* str1 = "named-destination";
    const SkRect r1 = SkRect::MakeXYWH(5, 5, 0, 0); // collapsed to a point
    sk_sp<SkData> d1(SkData::MakeWithCString(str1));
    SkAnnotateNamedDestination(recordingCanvas, {r1.x(), r1.y()}, d1.get());

    const char* str2 = "link-to-destination";
    const SkRect r2 = SkRect::MakeXYWH(20, 20, 5, 6);
    sk_sp<SkData> d2(SkData::MakeWithCString(str2));
    SkAnnotateLinkToDestination(recordingCanvas, r2, d2.get());

    const AnnotationRec recs[] = {
        { r0, SkAnnotationKeys::URL_Key(),                  std::move(d0) },
        { r1, SkAnnotationKeys::Define_Named_Dest_Key(),    std::move(d1) },
        { r2, SkAnnotationKeys::Link_Named_Dest_Key(),      std::move(d2) },
    };

    sk_sp<SkPicture> pict0(recorder.finishRecordingAsPicture());
    sk_sp<SkPicture> pict1(copy_picture_via_serialization(pict0.get()));

    TestAnnotationCanvas canvas(reporter, recs, SK_ARRAY_COUNT(recs));
    canvas.drawPicture(pict1);
}

SkMagnifierImageFilter::SkMagnifierImageFilter(const SkRect& srcRect, SkScalar inset,
                                               sk_sp<SkImageFilter> input)
    : INHERITED(&input, 1, nullptr)
    , fSrcRect(srcRect)
    , fInset(inset) {
    SkASSERT(srcRect.x() >= 0 && srcRect.y() >= 0 && inset >= 0);
}

static void imagescaleproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect& srcIR,
                           const SkRect& dstR) {
    const int newW = SkScalarRoundToInt(dstR.width());
    const int newH = SkScalarRoundToInt(dstR.height());
    SkAutoTUnref<SkImage> newImage(image->newImage(newW, newH, &srcIR));

#ifdef SK_DEBUG
    const SkIRect baseR = SkIRect::MakeWH(image->width(), image->height());
    const bool containsSubset = baseR.contains(srcIR);
#endif

    if (newImage) {
        SkASSERT(containsSubset);
        canvas->drawImage(newImage, dstR.x(), dstR.y());
    } else {
        // newImage() does not support subsets that are not contained by the original
        // but drawImageRect does, so we just draw an X in its place to indicate that we are
        // deliberately not drawing here.
        SkASSERT(!containsSubset);
        SkPaint paint;
        paint.setStyle(SkPaint::kStroke_Style);
        paint.setStrokeWidth(4);
        canvas->drawLine(4, 4, newW - 4.0f, newH - 4.0f, paint);
        canvas->drawLine(4, newH - 4.0f, newW - 4.0f, 4, paint);
    }
}

static void convolve_gaussian_2d(GrDrawContext* drawContext,
                                 const GrClip& clip,
                                 const SkRect& srcRect,
                                 GrTexture* texture,
                                 int radiusX,
                                 int radiusY,
                                 SkScalar sigmaX,
                                 SkScalar sigmaY,
                                 const SkRect* srcBounds) {
    SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
    SkMatrix localMatrix = SkMatrix::MakeTrans(srcRect.x(), srcRect.y());
    SkISize size = SkISize::Make(2 * radiusX + 1,  2 * radiusY + 1);
    SkIPoint kernelOffset = SkIPoint::Make(radiusX, radiusY);
    GrPaint paint;
    SkIRect bounds;
    if (srcBounds) {
        srcBounds->roundOut(&bounds);
    } else {
        bounds.setEmpty();
    }

    SkAutoTUnref<GrFragmentProcessor> conv(GrMatrixConvolutionEffect::CreateGaussian(
            texture, bounds, size, 1.0, 0.0, kernelOffset,
            srcBounds ? GrTextureDomain::kDecal_Mode : GrTextureDomain::kIgnore_Mode,
            true, sigmaX, sigmaY));
    paint.addColorFragmentProcessor(conv);
    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
    drawContext->fillRectWithLocalMatrix(clip, paint, SkMatrix::I(), dstRect, localMatrix);
}

SkImage* SkImage_Base::onNewImage(int newWidth, int newHeight, const SkIRect* subset,
                                  SkFilterQuality quality) const {
    const bool opaque = this->isOpaque();
    const SkImageInfo info = SkImageInfo::Make(newWidth, newHeight, kN32_SkColorType,
                                               opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
    SkAutoTUnref<SkSurface> surface(this->newSurface(info, nullptr));
    if (!surface.get()) {
        return nullptr;
    }

    SkRect src;
    if (subset) {
        src.set(*subset);
    } else {
        src = SkRect::MakeIWH(this->width(), this->height());
    }

    surface->getCanvas()->scale(newWidth / src.width(), newHeight / src.height());
    surface->getCanvas()->translate(-src.x(), -src.y());

    SkPaint paint;
    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    paint.setFilterQuality(quality);
    surface->getCanvas()->drawImage(this, 0, 0, &paint);
    return surface->newImageSnapshot();
}

sk_sp<SkImageFilter> SkTileImageFilter::Make(const SkRect& srcRect, const SkRect& dstRect,
                                             sk_sp<SkImageFilter> input) {
    if (!SkIsValidRect(srcRect) || !SkIsValidRect(dstRect)) {
        return nullptr;
    }
    if (srcRect.width() == dstRect.width() && srcRect.height() == dstRect.height()) {
        SkRect ir = dstRect;
        if (!ir.intersect(srcRect)) {
            return input;
        }
        CropRect cropRect(ir);
        return SkOffsetImageFilter::Make(dstRect.x() - srcRect.x(),
                                         dstRect.y() - srcRect.y(),
                                         std::move(input),
                                         &cropRect);
    }
    return sk_sp<SkImageFilter>(new SkTileImageFilter(srcRect, dstRect, std::move(input)));
}

static void drawTestCase(SkCanvas* canvas,
                         SkScalar textScale,
                         SkScalar strokeWidth,
                         SkPaint::Style strokeStyle) {
        SkPaint paint;
        paint.setColor(SK_ColorBLACK);
        paint.setAntiAlias(true);
        paint.setTextSize(kTextHeight * textScale);
        sk_tool_utils::set_portable_typeface(&paint);
        paint.setStrokeWidth(strokeWidth);
        paint.setStyle(strokeStyle);

        // This demonstrates that we can not measure the text if
        // there's a device transform. The canvas total matrix will
        // end up being a device transform.
        bool drawRef = !(canvas->getTotalMatrix().getType() &
                         ~(SkMatrix::kIdentity_Mask | SkMatrix::kTranslate_Mask));

        SkRect bounds;
        if (drawRef) {
            SkScalar advance = paint.measureText(kText, sizeof(kText) - 1, &bounds);

            paint.setStrokeWidth(0.0f);
            paint.setStyle(SkPaint::kStroke_Style);

            // Green box is the measured text bounds.
            paint.setColor(SK_ColorGREEN);
            canvas->drawRect(bounds, paint);

            // Red line is the measured advance from the 0,0 of the text position.
            paint.setColor(SK_ColorRED);
            canvas->drawLine(0.0f, 0.0f, advance, 0.0f, paint);
        }

        // Black text is the testcase, eg. the text.
        paint.setColor(SK_ColorBLACK);
        paint.setStrokeWidth(strokeWidth);
        paint.setStyle(strokeStyle);
        canvas->drawText(kText, sizeof(kText) - 1, 0.0f, 0.0f, paint);

        if (drawRef) {
            SkScalar widths[sizeof(kText) - 1];
            paint.getTextWidths(kText, sizeof(kText) - 1, widths, nullptr);

            paint.setStrokeWidth(0.0f);
            paint.setStyle(SkPaint::kStroke_Style);

            // Magenta lines are the positions for the characters.
            paint.setColor(SK_ColorMAGENTA);
            SkScalar w = bounds.x();
            for (size_t i = 0; i < sizeof(kText) - 1; ++i) {
                canvas->drawLine(w, 0.0f, w, 5.0f, paint);
                w += widths[i];
            }
        }
}

    void drawRect(const SkRect& r, SkColor c) override {
        CGContextRef cg = (CGContextRef)fCanvas->accessTopRasterHandle();
        
        CGColorRef color = CGColorCreateGenericRGB(SkColorGetR(c)/255.f,
                                                   SkColorGetG(c)/255.f,
                                                   SkColorGetB(c)/255.f,
                                                   SkColorGetA(c)/255.f);

        CGContextSetFillColorWithColor(cg, color);
        CGContextFillRect(cg, CGRectMake(r.x(), r.y(), r.width(), r.height()));
    }

// Return true if the rectangle is aligned to integer boundaries.
// See comments for computeBitmapDrawRects() for how this is used.
static bool areBoundariesIntegerAligned(const SkRect& rect)
{
    // Value is 1.19209e-007. This is the tolerance threshold.
    const float epsilon = std::numeric_limits<float>::epsilon();
    SkIRect roundedRect = roundedIntRect(rect);

    return fabs(rect.x() - roundedRect.x()) < epsilon
        && fabs(rect.y() - roundedRect.y()) < epsilon
        && fabs(rect.right() - roundedRect.right()) < epsilon
        && fabs(rect.bottom() - roundedRect.bottom()) < epsilon;
}

void SkDeferredCanvas::onDrawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y,
                                const SkPaint* paint) {
    const SkScalar w = SkIntToScalar(bitmap.width());
    const SkScalar h = SkIntToScalar(bitmap.height());
    SkRect bounds = SkRect::MakeXYWH(x, y, w, h);
    this->flush_check(&bounds, paint, kNoClip_Flag);
    if (bounds.width() == w && bounds.height() == h) {
        fCanvas->drawBitmap(bitmap, bounds.x(), bounds.y(), paint);
    } else {
        fCanvas->drawBitmapRect(bitmap, bounds, paint);
    }
}