C++ SkScalarCeilToInt函数代码示例

SkRTree::Branch SkRTree::bulkLoad(SkTDArray<Branch>* branches, int level) {
    if (branches->count() == 1) { // Only one branch.  It will be the root.
        return (*branches)[0];
    }

    // We might sort our branches here, but we expect Blink gives us a reasonable x,y order.
    // Skipping a call to sort (in Y) here resulted in a 17% win for recording with negligible
    // difference in playback speed.
    int numBranches = branches->count() / kMaxChildren;
    int remainder   = branches->count() % kMaxChildren;
    int newBranches = 0;

    if (remainder > 0) {
        ++numBranches;
        // If the remainder isn't enough to fill a node, we'll add fewer nodes to other branches.
        if (remainder >= kMinChildren) {
            remainder = 0;
        } else {
            remainder = kMinChildren - remainder;
        }
    }

    int numStrips = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(numBranches) / fAspectRatio));
    int numTiles  = SkScalarCeilToInt(SkIntToScalar(numBranches) / SkIntToScalar(numStrips));
    int currentBranch = 0;

    for (int i = 0; i < numStrips; ++i) {
        // Might be worth sorting by X here too.
        for (int j = 0; j < numTiles && currentBranch < branches->count(); ++j) {
            int incrementBy = kMaxChildren;
            if (remainder != 0) {
                // if need be, omit some nodes to make up for remainder
                if (remainder <= kMaxChildren - kMinChildren) {
                    incrementBy -= remainder;
                    remainder = 0;
                } else {
                    incrementBy = kMinChildren;
                    remainder -= kMaxChildren - kMinChildren;
                }
            }
            Node* n = allocateNodeAtLevel(level);
            n->fNumChildren = 1;
            n->fChildren[0] = (*branches)[currentBranch];
            Branch b;
            b.fBounds = (*branches)[currentBranch].fBounds;
            b.fSubtree = n;
            ++currentBranch;
            for (int k = 1; k < incrementBy && currentBranch < branches->count(); ++k) {
                b.fBounds.join((*branches)[currentBranch].fBounds);
                n->fChildren[k] = (*branches)[currentBranch];
                ++n->fNumChildren;
                ++currentBranch;
            }
            (*branches)[newBranches] = b;
            ++newBranches;
        }
    }
    branches->setCount(newBranches);
    return this->bulkLoad(branches, level + 1);
}

bool SkBicubicImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                          SkBitmap* result, SkIPoint* offset) {
    SkBitmap srcBM;
    if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &srcBM, offset)) {
        return false;
    }
    GrTexture* srcTexture = srcBM.getTexture();
    GrContext* context = srcTexture->getContext();

    SkRect dstRect = SkRect::MakeWH(srcBM.width() * fScale.fWidth,
                                    srcBM.height() * fScale.fHeight);

    GrTextureDesc desc;
    desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
    desc.fWidth = SkScalarCeilToInt(dstRect.width());
    desc.fHeight = SkScalarCeilToInt(dstRect.height());
    desc.fConfig = kSkia8888_GrPixelConfig;

    GrAutoScratchTexture ast(context, desc);
    SkAutoTUnref<GrTexture> dst(ast.detach());
    if (!dst) {
        return false;
    }
    GrContext::AutoRenderTarget art(context, dst->asRenderTarget());
    GrPaint paint;
    paint.addColorEffect(GrBicubicEffect::Create(srcTexture, fCoefficients))->unref();
    SkRect srcRect;
    srcBM.getBounds(&srcRect);
    context->drawRectToRect(paint, dstRect, srcRect);
    return SkImageFilterUtils::WrapTexture(dst, desc.fWidth, desc.fHeight, result);
}

bool PipePictureRenderer::render(SkBitmap** out) {
    SkASSERT(fCanvas.get() != NULL);
    SkASSERT(fPicture != NULL);
    if (NULL == fCanvas.get() || NULL == fPicture) {
        return false;
    }

    PipeController pipeController(fCanvas.get());
    SkGPipeWriter writer;
    SkCanvas* pipeCanvas = writer.startRecording(&pipeController);
    pipeCanvas->drawPicture(fPicture);
    writer.endRecording();
    fCanvas->flush();
    if (out) {
        *out = SkNEW(SkBitmap);
        setup_bitmap(*out, SkScalarCeilToInt(fPicture->cullRect().width()),
                           SkScalarCeilToInt(fPicture->cullRect().height()));
        fCanvas->readPixels(*out, 0, 0);
    }
    if (fEnableWrites) {
        return write(fCanvas, fWritePath, fMismatchPath, fInputFilename, fJsonSummaryPtr,
                     fUseChecksumBasedFilenames);
    } else {
        return true;
    }
}

void GpuGMTask::draw(GrContextFactory* grFactory) {
    SkImageInfo info = SkImageInfo::Make(SkScalarCeilToInt(fGM->width()),
                                         SkScalarCeilToInt(fGM->height()),
                                         kN32_SkColorType,
                                         kPremul_SkAlphaType);
    SkAutoTUnref<SkSurface> surface(NewGpuSurface(grFactory, fContextType, fGpuAPI, info,
                                                  fSampleCount));
    if (!surface) {
        if (!gAlreadyWarned[fContextType][fGpuAPI]) {
            SkDebugf("FYI: couldn't create GPU context, type %d API %d.  Will skip.\n",
                     fContextType, fGpuAPI);
            gAlreadyWarned[fContextType][fGpuAPI] = true;
        }
        return;
    }
    SkCanvas* canvas = surface->getCanvas();
    CanvasPreflight(canvas);

    canvas->concat(fGM->getInitialTransform());
    fGM->draw(canvas);
    canvas->flush();
#if GR_CACHE_STATS && SK_SUPPORT_GPU
    if (FLAGS_veryVerbose) {
        grFactory->get(fContextType)->printCacheStats();
    }
#endif

    SkBitmap bitmap;
    bitmap.setInfo(info);
    canvas->readPixels(&bitmap, 0, 0);

    this->spawnChild(SkNEW_ARGS(WriteTask, (*this, "GM", bitmap)));
}

SkIRect SkDisplacementMapEffect::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                                    MapDirection) const {
    SkVector scale = SkVector::Make(fScale, fScale);
    ctm.mapVectors(&scale, 1);
    return src.makeOutset(SkScalarCeilToInt(SkScalarAbs(scale.fX) * SK_ScalarHalf),
                          SkScalarCeilToInt(SkScalarAbs(scale.fY) * SK_ScalarHalf));
}

void SKPBench::onPerCanvasPreDraw(SkCanvas* canvas) {
    if (!fUseMultiPictureDraw) {
        return;
    }

    SkIRect bounds;
    SkAssertResult(canvas->getClipDeviceBounds(&bounds));

    int xTiles = SkScalarCeilToInt(bounds.width()  / SkIntToScalar(FLAGS_benchTile));
    int yTiles = SkScalarCeilToInt(bounds.height() / SkIntToScalar(FLAGS_benchTile));

    fSurfaces.setReserve(xTiles * yTiles);
    fTileRects.setReserve(xTiles * yTiles);

    SkImageInfo ii = canvas->imageInfo().makeWH(FLAGS_benchTile, FLAGS_benchTile);

    for (int y = bounds.fTop; y < bounds.fBottom; y += FLAGS_benchTile) {
        for (int x = bounds.fLeft; x < bounds.fRight; x += FLAGS_benchTile) {
            const SkIRect tileRect = SkIRect::MakeXYWH(x, y, FLAGS_benchTile, FLAGS_benchTile);
            *fTileRects.append() = tileRect;
            *fSurfaces.push() = canvas->newSurface(ii);

            // Never want the contents of a tile to include stuff the parent
            // canvas clips out
            SkRect clip = SkRect::Make(bounds);
            clip.offset(-SkIntToScalar(tileRect.fLeft), -SkIntToScalar(tileRect.fTop));
            fSurfaces.top()->getCanvas()->clipRect(clip);

            fSurfaces.top()->getCanvas()->setMatrix(canvas->getTotalMatrix());
            fSurfaces.top()->getCanvas()->scale(fScale, fScale);
        }
    }
}

SkIRect SkMorphologyImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                                    MapDirection) const {
    SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                     SkIntToScalar(this->radius().height()));
    ctm.mapVectors(&radius, 1);
    return src.makeOutset(SkScalarCeilToInt(radius.x()), SkScalarCeilToInt(radius.y()));
}

void SkBlurImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                           SkIRect* dst, MapDirection) const {
    *dst = src;
    SkVector sigma = mapSigma(fSigma, ctm);
    dst->outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
}

static SkBitmap draw_picture(SkPicture& picture) {
     SkBitmap bitmap;
     bitmap.allocN32Pixels(SkScalarCeilToInt(picture.cullRect().width()),
                           SkScalarCeilToInt(picture.cullRect().height()));
     SkCanvas canvas(bitmap);
     picture.playback(&canvas);
     return bitmap;
}

void SkDisplacementMapEffect::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                   SkIRect* dst, MapDirection) const {
    *dst = src;
    SkVector scale = SkVector::Make(fScale, fScale);
    ctm.mapVectors(&scale, 1);
    dst->outset(SkScalarCeilToInt(scale.fX * SK_ScalarHalf),
                SkScalarCeilToInt(scale.fY * SK_ScalarHalf));
}

int tool_main(int argc, char** argv) {
    SkCommandLineFlags::Parse(argc, argv);

    for (int i = 0; i < FLAGS_skps.count(); i++) {
        if (SkCommandLineFlags::ShouldSkip(FLAGS_match, FLAGS_skps[i])) {
            continue;
        }

        SkAutoTDelete<SkStream> stream(SkStream::NewFromFile(FLAGS_skps[i]));
        if (!stream) {
            SkDebugf("Could not read %s.\n", FLAGS_skps[i]);
            return 1;
        }
        sk_sp<SkPicture> src(SkPicture::MakeFromStream(stream));
        if (!src) {
            SkDebugf("Could not read %s as an SkPicture.\n", FLAGS_skps[i]);
            return 1;
        }
        if (FLAGS_defer) {
            SkPictureRecorder recorder;
            SkDeferredCanvas deferred(recorder.beginRecording(src->cullRect()));
            src->playback(&deferred);
            src = recorder.finishRecordingAsPicture();
        }
        const int w = SkScalarCeilToInt(src->cullRect().width());
        const int h = SkScalarCeilToInt(src->cullRect().height());

        SkRecord record;
        SkRecorder canvas(&record, w, h);
        src->playback(&canvas);

        if (FLAGS_optimize) {
            SkRecordOptimize(&record);
        }
        if (FLAGS_optimize2) {
            SkRecordOptimize2(&record);
        }

        dump(FLAGS_skps[i], w, h, record);

        if (FLAGS_write.count() > 0) {
            SkPictureRecorder r;
            SkRecordDraw(record,
                         r.beginRecording(SkRect::MakeIWH(w, h)),
                         nullptr,
                         nullptr,
                         0,
                         nullptr,
                         nullptr);
            sk_sp<SkPicture> dst(r.finishRecordingAsPicture());
            SkFILEWStream ostream(FLAGS_write[0]);
            dst->serialize(&ostream);
        }
    }

    return 0;
}

void SkOffsetImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                             SkIRect* dst, MapDirection direction) const {
    SkVector vec;
    ctm.mapVectors(&vec, &fOffset, 1);
    if (kReverse_MapDirection == direction) {
        vec.negate();
    }

    *dst = src;
    dst->offset(SkScalarCeilToInt(vec.fX), SkScalarCeilToInt(vec.fY));
}

// Create a mask of 'devPath' and place the result in 'mask'.
static GrTexture* create_mask_GPU(GrContext* context,
                                  SkRect* maskRect,
                                  const SkPath& devPath,
                                  const GrStrokeInfo& strokeInfo,
                                  bool doAA,
                                  int sampleCnt) {
    // This mask will ultimately be drawn as a non-AA rect (see draw_mask).
    // Non-AA rects have a bad habit of snapping arbitrarily. Integerize here
    // so the mask draws in a reproducible manner.
    *maskRect = SkRect::Make(maskRect->roundOut());

    GrSurfaceDesc desc;
    desc.fFlags = kRenderTarget_GrSurfaceFlag;
    desc.fWidth = SkScalarCeilToInt(maskRect->width());
    desc.fHeight = SkScalarCeilToInt(maskRect->height());
    desc.fSampleCnt = doAA ? sampleCnt : 0;
    // We actually only need A8, but it often isn't supported as a
    // render target so default to RGBA_8888
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    if (context->caps()->isConfigRenderable(kAlpha_8_GrPixelConfig, desc.fSampleCnt > 0)) {
        desc.fConfig = kAlpha_8_GrPixelConfig;
    }

    GrTexture* mask = context->textureProvider()->createApproxTexture(desc);
    if (nullptr == mask) {
        return nullptr;
    }

    SkRect clipRect = SkRect::MakeWH(maskRect->width(), maskRect->height());

    SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(mask->asRenderTarget()));
    if (!drawContext) {
        return nullptr;
    }

    drawContext->clear(nullptr, 0x0, true);

    GrPaint tempPaint;
    tempPaint.setAntiAlias(doAA);
    tempPaint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op);

    // setup new clip
    GrClip clip(clipRect);

    // Draw the mask into maskTexture with the path's integerized top-left at
    // the origin using tempPaint.
    SkMatrix translate;
    translate.setTranslate(-maskRect->fLeft, -maskRect->fTop);
    drawContext->drawPath(clip, tempPaint, translate, devPath, strokeInfo);
    return mask;
}

    void onOnceBeforeDraw() override {
       // Build the picture.
        SkPictureRecorder recorder;
        SkCanvas* pictureCanvas = recorder.beginRecording(fTileSize, fTileSize, NULL, 0);
        this->drawTile(pictureCanvas);
        fPicture.reset(recorder.endRecording());

        // Build a reference bitmap.
        fBitmap.allocN32Pixels(SkScalarCeilToInt(fTileSize), SkScalarCeilToInt(fTileSize));
        fBitmap.eraseColor(SK_ColorTRANSPARENT);
        SkCanvas bitmapCanvas(fBitmap);
        this->drawTile(&bitmapCanvas);
    }

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;
}