C++ SkIRect::outset方法代码示例

void SkTileGrid::insert(void* data, const SkRect& fbounds, bool) {
    SkASSERT(!fbounds.isEmpty());
    SkIRect dilatedBounds;
    if (fbounds.isLargest()) {
        // Dilating the largest SkIRect will overflow.  Other nearly-largest rects may overflow too,
        // but we don't make active use of them like we do the largest.
        dilatedBounds.setLargest();
    } else {
        fbounds.roundOut(&dilatedBounds);
        dilatedBounds.outset(fInfo.fMargin.width(), fInfo.fMargin.height());
        dilatedBounds.offset(fInfo.fOffset);
    }

    const SkIRect gridBounds =
        { 0, 0, fInfo.fTileInterval.width() * fXTiles, fInfo.fTileInterval.height() * fYTiles };
    if (!SkIRect::Intersects(dilatedBounds, gridBounds)) {
        return;
    }

    // Note: SkIRects are non-inclusive of the right() column and bottom() row,
    // hence the "-1"s in the computations of maxX and maxY.
    int minX = SkMax32(0, SkMin32(dilatedBounds.left() / fInfo.fTileInterval.width(), fXTiles - 1));
    int minY = SkMax32(0, SkMin32(dilatedBounds.top() / fInfo.fTileInterval.height(), fYTiles - 1));
    int maxX = SkMax32(0, SkMin32((dilatedBounds.right()  - 1) / fInfo.fTileInterval.width(),
                                  fXTiles - 1));
    int maxY = SkMax32(0, SkMin32((dilatedBounds.bottom() - 1) / fInfo.fTileInterval.height(),
                                  fYTiles - 1));

    Entry entry = { fCount++, data };
    for (int y = minY; y <= maxY; y++) {
        for (int x = minX; x <= maxX; x++) {
            fTiles[y * fXTiles + x].push(entry);
        }
    }
}

bool SkMorphologyImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                             SkIRect* dst) const {
    SkIRect bounds = src;
    SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                     SkIntToScalar(this->radius().height()));
    ctm.mapVectors(&radius, 1);
    bounds.outset(SkScalarCeilToInt(radius.x()), SkScalarCeilToInt(radius.y()));
    if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) {
        return false;
    }
    *dst = bounds;
    return true;
}

bool SkDisplacementMapEffect::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                   SkIRect* dst) const {
    SkIRect bounds = src;
    SkVector scale = SkVector::Make(fScale, fScale);
    ctm.mapVectors(&scale, 1);
    bounds.outset(SkScalarCeilToInt(scale.fX * SK_ScalarHalf),
                  SkScalarCeilToInt(scale.fY * SK_ScalarHalf));
    if (getColorInput()) {
        return getColorInput()->filterBounds(bounds, ctm, dst);
    }
    *dst = bounds;
    return true;
}

bool SkBlurImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                       SkIRect* dst) const {
    SkIRect bounds = src;
    if (getInput(0) && !getInput(0)->filterBounds(src, ctm, &bounds)) {
        return false;
    }
    SkVector sigma = SkVector::Make(fSigma.width(), fSigma.height());
    ctm.mapVectors(&sigma, 1);
    bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                  SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
    *dst = bounds;
    return true;
}

bool SkDropShadowImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                             SkIRect* dst) const {
    SkIRect bounds = src;
    if (getInput(0) && !getInput(0)->filterBounds(src, ctm, &bounds)) {
        return false;
    }
    SkVector offsetVec = SkVector::Make(fDx, fDy);
    ctm.mapVectors(&offsetVec, 1);
    bounds.offset(-SkScalarCeilToInt(offsetVec.x()),
                  -SkScalarCeilToInt(offsetVec.y()));
    SkVector sigma = SkVector::Make(fSigmaX, fSigmaY);
    ctm.mapVectors(&sigma, 1);
    bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                  SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
    bounds.join(src);
    *dst = bounds;
    return true;
}

SkIRect SkDropShadowImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                                    MapDirection direction) const {
    SkVector offsetVec = SkVector::Make(fDx, fDy);
    if (kReverse_MapDirection == direction) {
        offsetVec.negate();
    }
    ctm.mapVectors(&offsetVec, 1);
    SkIRect dst = src.makeOffset(SkScalarCeilToInt(offsetVec.x()),
                                 SkScalarCeilToInt(offsetVec.y()));
    SkVector sigma = SkVector::Make(fSigmaX, fSigmaY);
    ctm.mapVectors(&sigma, 1);
    dst.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
    if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
        dst.join(src);
    }
    return dst;
}

DEF_TEST(CanvasState_test_complex_clips, reporter) {
    const int WIDTH = 400;
    const int HEIGHT = 400;
    const int SPACER = 10;

    SkIRect layerRect = SkIRect::MakeWH(WIDTH, HEIGHT / 4);
    layerRect.inset(2*SPACER, 2*SPACER);

    SkIRect clipRect = layerRect;
    clipRect.fRight = clipRect.fLeft + (clipRect.width() / 2) - (2*SPACER);
    clipRect.outset(SPACER, SPACER);

    SkIRect regionBounds = clipRect;
    regionBounds.offset(clipRect.width() + (2*SPACER), 0);

    SkIRect regionInterior = regionBounds;
    regionInterior.inset(SPACER*3, SPACER*3);

    SkRegion clipRegion;
    clipRegion.setRect(regionBounds);
    clipRegion.op(regionInterior, SkRegion::kDifference_Op);


    const SkRegion::Op clipOps[] = { SkRegion::kIntersect_Op,
                                     SkRegion::kIntersect_Op,
                                     SkRegion::kReplace_Op,
    };
    const SkCanvas::SaveLayerFlags flags[] = {
        static_cast<SkCanvas::SaveLayerFlags>(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag),
        0,
        static_cast<SkCanvas::SaveLayerFlags>(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag),
    };
    REPORTER_ASSERT(reporter, sizeof(clipOps) == sizeof(flags));

    bool (*drawFn)(SkCanvasState* state, int32_t l, int32_t t,
                   int32_t r, int32_t b, int32_t clipOp,
                   int32_t regionRects, int32_t* rectCoords);

    OpenLibResult openLibResult(reporter);
    if (openLibResult.handle() != nullptr) {
        *(void**) (&drawFn) = dlsym(openLibResult.handle(),
                                    "complex_clips_draw_from_canvas_state");
    } else {
        drawFn = complex_clips_draw_from_canvas_state;
    }

    REPORTER_ASSERT(reporter, drawFn);
    if (!drawFn) {
        return;
    }

    SkBitmap bitmaps[2];
    for (int i = 0; i < 2; ++i) {
        bitmaps[i].allocN32Pixels(WIDTH, HEIGHT);

        SkCanvas canvas(bitmaps[i]);

        canvas.drawColor(SK_ColorRED);

        SkRegion localRegion = clipRegion;

        SkPaint paint;
        paint.setAlpha(128);
        for (size_t j = 0; j < SK_ARRAY_COUNT(flags); ++j) {
            SkRect layerBounds = SkRect::Make(layerRect);
            canvas.saveLayer(SkCanvas::SaveLayerRec(&layerBounds, &paint, flags[j]));

            if (i) {
                SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
                REPORTER_ASSERT(reporter, state);

                SkRegion::Iterator iter(localRegion);
                SkTDArray<int32_t> rectCoords;
                for (; !iter.done(); iter.next()) {
                    const SkIRect& rect = iter.rect();
                    *rectCoords.append() = rect.fLeft;
                    *rectCoords.append() = rect.fTop;
                    *rectCoords.append() = rect.fRight;
                    *rectCoords.append() = rect.fBottom;
                }
                bool success = drawFn(state, clipRect.fLeft, clipRect.fTop,
                                      clipRect.fRight, clipRect.fBottom, clipOps[j],
                                      rectCoords.count() / 4, rectCoords.begin());
                REPORTER_ASSERT(reporter, success);

                SkCanvasStateUtils::ReleaseCanvasState(state);
            } else {
                complex_clips_draw(&canvas, clipRect.fLeft, clipRect.fTop,
                                   clipRect.fRight, clipRect.fBottom, clipOps[j],
                                   localRegion);
            }

            canvas.restore();

            // translate the canvas and region for the next iteration
            canvas.translate(0, SkIntToScalar(2*(layerRect.height() + (SPACER))));
            localRegion.translate(0, 2*(layerRect.height() + SPACER));
        }
    }

//.........这里部分代码省略.........

    bool addPathToAtlas(GrVertexBatch::Target* target,
                        FlushInfo* flushInfo,
                        GrBatchAtlas* atlas,
                        ShapeData* shapeData,
                        const GrShape& shape,
                        bool antiAlias,
                        uint32_t dimension,
                        SkScalar scale) const {
        const SkRect& bounds = shape.bounds();

        // generate bounding rect for bitmap draw
        SkRect scaledBounds = bounds;
        // scale to mip level size
        scaledBounds.fLeft *= scale;
        scaledBounds.fTop *= scale;
        scaledBounds.fRight *= scale;
        scaledBounds.fBottom *= scale;
        // move the origin to an integer boundary (gives better results)
        SkScalar dx = SkScalarFraction(scaledBounds.fLeft);
        SkScalar dy = SkScalarFraction(scaledBounds.fTop);
        scaledBounds.offset(-dx, -dy);
        // get integer boundary
        SkIRect devPathBounds;
        scaledBounds.roundOut(&devPathBounds);
        // pad to allow room for antialiasing
        const int intPad = SkScalarCeilToInt(kAntiAliasPad);
        // pre-move origin (after outset, will be 0,0)
        int width = devPathBounds.width();
        int height = devPathBounds.height();
        devPathBounds.fLeft = intPad;
        devPathBounds.fTop = intPad;
        devPathBounds.fRight = intPad + width;
        devPathBounds.fBottom = intPad + height;
        devPathBounds.outset(intPad, intPad);

        // draw path to bitmap
        SkMatrix drawMatrix;
        drawMatrix.setTranslate(-bounds.left(), -bounds.top());
        drawMatrix.postScale(scale, scale);
        drawMatrix.postTranslate(kAntiAliasPad, kAntiAliasPad);

        // setup bitmap backing
        SkASSERT(devPathBounds.fLeft == 0);
        SkASSERT(devPathBounds.fTop == 0);
        SkAutoPixmapStorage dst;
        if (!dst.tryAlloc(SkImageInfo::MakeA8(devPathBounds.width(),
                                              devPathBounds.height()))) {
            return false;
        }
        sk_bzero(dst.writable_addr(), dst.getSafeSize());

        // rasterize path
        SkPaint paint;
        paint.setStyle(SkPaint::kFill_Style);
        paint.setAntiAlias(antiAlias);

        SkDraw draw;
        sk_bzero(&draw, sizeof(draw));

        SkRasterClip rasterClip;
        rasterClip.setRect(devPathBounds);
        draw.fRC = &rasterClip;
        draw.fMatrix = &drawMatrix;
        draw.fDst = dst;

        SkPath path;
        shape.asPath(&path);
        draw.drawPathCoverage(path, paint);

        // generate signed distance field
        devPathBounds.outset(SK_DistanceFieldPad, SK_DistanceFieldPad);
        width = devPathBounds.width();
        height = devPathBounds.height();
        // TODO We should really generate this directly into the plot somehow
        SkAutoSMalloc<1024> dfStorage(width * height * sizeof(unsigned char));

        // Generate signed distance field
        SkGenerateDistanceFieldFromA8Image((unsigned char*)dfStorage.get(),
                                           (const unsigned char*)dst.addr(),
                                           dst.width(), dst.height(), dst.rowBytes());

        // add to atlas
        SkIPoint16 atlasLocation;
        GrBatchAtlas::AtlasID id;
       if (!atlas->addToAtlas(&id, target, width, height, dfStorage.get(), &atlasLocation)) {
            this->flush(target, flushInfo);
            if (!atlas->addToAtlas(&id, target, width, height, dfStorage.get(), &atlasLocation)) {
                return false;
            }
        }

        // add to cache
        shapeData->fKey.set(shape, dimension);
        shapeData->fScale = scale;
        shapeData->fID = id;
        // change the scaled rect to match the size of the inset distance field
        scaledBounds.fRight = scaledBounds.fLeft +
            SkIntToScalar(devPathBounds.width() - 2*SK_DistanceFieldInset);
        scaledBounds.fBottom = scaledBounds.fTop +
            SkIntToScalar(devPathBounds.height() - 2*SK_DistanceFieldInset);
//.........这里部分代码省略.........

static void test_complex_clips(skiatest::Reporter* reporter) {
#ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
    const int WIDTH = 400;
    const int HEIGHT = 400;
    const int SPACER = 10;

    SkIRect layerRect = SkIRect::MakeWH(WIDTH, HEIGHT / 4);
    layerRect.inset(2*SPACER, 2*SPACER);

    SkIRect clipRect = layerRect;
    clipRect.fRight = clipRect.fLeft + (clipRect.width() / 2) - (2*SPACER);
    clipRect.outset(SPACER, SPACER);

    SkIRect regionBounds = clipRect;
    regionBounds.offset(clipRect.width() + (2*SPACER), 0);

    SkIRect regionInterior = regionBounds;
    regionInterior.inset(SPACER*3, SPACER*3);

    SkRegion clipRegion;
    clipRegion.setRect(regionBounds);
    clipRegion.op(regionInterior, SkRegion::kDifference_Op);


    const SkRegion::Op clipOps[] = { SkRegion::kIntersect_Op,
                                     SkRegion::kIntersect_Op,
                                     SkRegion::kReplace_Op,
    };
    const SkCanvas::SaveFlags flags[] = { SkCanvas::kARGB_NoClipLayer_SaveFlag,
                                          SkCanvas::kARGB_ClipLayer_SaveFlag,
                                          SkCanvas::kARGB_NoClipLayer_SaveFlag,
    };
    REPORTER_ASSERT(reporter, sizeof(clipOps) == sizeof(flags));
    const int layerCombinations = sizeof(flags) / sizeof(SkCanvas::SaveFlags);

    SkBitmap bitmaps[2];
    for (int i = 0; i < 2; ++i) {
        bitmaps[i].allocN32Pixels(WIDTH, HEIGHT);

        SkCanvas canvas(bitmaps[i]);

        canvas.drawColor(SK_ColorRED);

        SkRegion localRegion = clipRegion;

        for (int j = 0; j < layerCombinations; ++j) {
            SkRect layerBounds = SkRect::Make(layerRect);
            canvas.saveLayerAlpha(&layerBounds, 128, flags[j]);

            SkCanvasState* state = NULL;
            SkCanvas* tmpCanvas = NULL;
            if (i) {
                state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
                REPORTER_ASSERT(reporter, state);
                tmpCanvas = SkCanvasStateUtils::CreateFromCanvasState(state);
                REPORTER_ASSERT(reporter, tmpCanvas);
            } else {
                tmpCanvas = SkRef(&canvas);
            }

            tmpCanvas->save();
            tmpCanvas->clipRect(SkRect::Make(clipRect), clipOps[j]);
            tmpCanvas->drawColor(SK_ColorBLUE);
            tmpCanvas->restore();

            tmpCanvas->clipRegion(localRegion, clipOps[j]);
            tmpCanvas->drawColor(SK_ColorBLUE);

            tmpCanvas->unref();
            SkCanvasStateUtils::ReleaseCanvasState(state);

            canvas.restore();

            // translate the canvas and region for the next iteration
            canvas.translate(0, SkIntToScalar(2*(layerRect.height() + (SPACER))));
            localRegion.translate(0, 2*(layerRect.height() + SPACER));
        }
    }

    // now we memcmp the two bitmaps
    REPORTER_ASSERT(reporter, bitmaps[0].getSize() == bitmaps[1].getSize());
    REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
                                      bitmaps[1].getPixels(),
                                      bitmaps[0].getSize()));
#endif
}

void draw(SkCanvas* canvas) {
    SkIRect rect = { 10, 14, 50, 73 };
    rect.outset(5, 13);
    SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
}