C++ SkIRect::left方法代码示例

void computeDisplacement(Extractor ex, const SkVector& scale, SkBitmap* dst,
                         const SkBitmap& displ, const SkIPoint& offset,
                         const SkBitmap& src,
                         const SkIRect& bounds) {
    static const SkScalar Inv8bit = SkScalarInvert(255);
    const int srcW = src.width();
    const int srcH = src.height();
    const SkVector scaleForColor = SkVector::Make(scale.fX * Inv8bit, scale.fY * Inv8bit);
    const SkVector scaleAdj = SkVector::Make(SK_ScalarHalf - scale.fX * SK_ScalarHalf,
                                             SK_ScalarHalf - scale.fY * SK_ScalarHalf);
    SkPMColor* dstPtr = dst->getAddr32(0, 0);
    for (int y = bounds.top(); y < bounds.bottom(); ++y) {
        const SkPMColor* displPtr = displ.getAddr32(bounds.left() + offset.fX, y + offset.fY);
        for (int x = bounds.left(); x < bounds.right(); ++x, ++displPtr) {
            SkPMColor c = unpremul_pm(*displPtr);

            SkScalar displX = scaleForColor.fX * ex.getX(c) + scaleAdj.fX;
            SkScalar displY = scaleForColor.fY * ex.getY(c) + scaleAdj.fY;
            // Truncate the displacement values
            const int32_t srcX = Sk32_sat_add(x, SkScalarTruncToInt(displX));
            const int32_t srcY = Sk32_sat_add(y, SkScalarTruncToInt(displY));
            *dstPtr++ = ((srcX < 0) || (srcX >= srcW) || (srcY < 0) || (srcY >= srcH)) ?
                      0 : *(src.getAddr32(srcX, srcY));
        }
    }
}

bool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy,
                                                   const SkBitmap& source,
                                                   const Context& ctx,
                                                   SkBitmap* result,
                                                   SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInput(0, proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

    if (src.colorType() != kN32_SkColorType) {
        return false;
    }

    SkIRect bounds;
    if (!this->applyCropRect(ctx, proxy, src, &srcOffset, &bounds, &src)) {
        return false;
    }

    if (!fConvolveAlpha && !src.isOpaque()) {
        src = unpremultiplyBitmap(proxy, src);
    }

    SkAutoLockPixels alp(src);
    if (!src.getPixels()) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (!device) {
        return false;
    }
    *result = device->accessBitmap(false);
    SkAutoLockPixels alp_result(*result);

    offset->fX = bounds.fLeft;
    offset->fY = bounds.fTop;
    bounds.offset(-srcOffset);
    SkIRect interior = SkIRect::MakeXYWH(bounds.left() + fKernelOffset.fX,
                                         bounds.top() + fKernelOffset.fY,
                                         bounds.width() - fKernelSize.fWidth + 1,
                                         bounds.height() - fKernelSize.fHeight + 1);
    SkIRect top = SkIRect::MakeLTRB(bounds.left(), bounds.top(), bounds.right(), interior.top());
    SkIRect bottom = SkIRect::MakeLTRB(bounds.left(), interior.bottom(),
                                       bounds.right(), bounds.bottom());
    SkIRect left = SkIRect::MakeLTRB(bounds.left(), interior.top(),
                                     interior.left(), interior.bottom());
    SkIRect right = SkIRect::MakeLTRB(interior.right(), interior.top(),
                                      bounds.right(), interior.bottom());
    filterBorderPixels(src, result, top, bounds);
    filterBorderPixels(src, result, left, bounds);
    filterInteriorPixels(src, result, interior, bounds);
    filterBorderPixels(src, result, right, bounds);
    filterBorderPixels(src, result, bottom, bounds);
    return true;
}

bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                   SkBitmap* result, SkIPoint* offset) const {
#if SK_SUPPORT_GPU
    SkBitmap input = src;
    SkASSERT(fInputCount == 1);
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInputGPU(0, proxy, src, ctx, &input, &srcOffset)) {
        return false;
    }
    GrTexture* srcTexture = input.getTexture();
    SkIRect bounds;
    if (!this->applyCropRect(ctx, proxy, input, &srcOffset, &bounds, &input)) {
        return false;
    }
    SkRect srcRect = SkRect::Make(bounds);
    SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
    GrContext* context = srcTexture->getContext();

    GrSurfaceDesc desc;
    desc.fFlags = kRenderTarget_GrSurfaceFlag,
    desc.fWidth = bounds.width();
    desc.fHeight = bounds.height();
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    SkAutoTUnref<GrTexture> dst(context->textureProvider()->createTexture(desc,
                                      GrTextureProvider::FromImageFilter(ctx.sizeConstraint())));
    if (!dst) {
        return false;
    }

    // setup new clip
    GrClip clip(dstRect);

    GrFragmentProcessor* fp;
    offset->fX = bounds.left();
    offset->fY = bounds.top();
    bounds.offset(-srcOffset);
    SkMatrix matrix(ctx.ctm());
    matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    GrPaint paint;
    if (this->asFragmentProcessor(&fp, srcTexture, matrix, bounds)) {
        SkASSERT(fp);
        paint.addColorFragmentProcessor(fp)->unref();
        paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);

        SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(dst->asRenderTarget()));
        if (drawContext) {
            drawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcRect);

            WrapTexture(dst, bounds.width(), bounds.height(), result);
            return true;
        }
    }
#endif
    return false;
}

bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
                                       const Context& ctx,
                                       SkBitmap* result, SkIPoint* offset) const {
    if (countInputs() < 1) {
        return false;
    }

    SkIRect bounds;
    if (!this->applyCropRect(ctx, src, SkIPoint::Make(0, 0), &bounds)) {
        return false;
    }

    const int x0 = bounds.left();
    const int y0 = bounds.top();

    SkAutoTUnref<SkBaseDevice> dst(proxy->createDevice(bounds.width(), bounds.height()));
    if (nullptr == dst) {
        return false;
    }
    SkCanvas canvas(dst);
    SkPaint paint;

    bool didProduceResult = false;
    int inputCount = countInputs();
    for (int i = 0; i < inputCount; ++i) {
        SkBitmap tmp;
        const SkBitmap* srcPtr;
        SkIPoint pos = SkIPoint::Make(0, 0);
        SkImageFilter* filter = getInput(i);
        if (filter) {
            if (!filter->filterImage(proxy, src, ctx, &tmp, &pos)) {
                continue;
            }
            srcPtr = &tmp;
        } else {
            srcPtr = &src;
        }

        if (fModes) {
            paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
        } else {
            paint.setXfermode(nullptr);
        }
        canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint);
        didProduceResult = true;
    }

    if (!didProduceResult)
        return false;

    offset->fX = bounds.left();
    offset->fY = bounds.top();
    *result = dst->accessBitmap(false);
    return true;
}

 static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) {
     x = (x - bounds.left()) % bounds.width() + bounds.left();
     y = (y - bounds.top()) % bounds.height() + bounds.top();
     if (x < bounds.left()) {
         x += bounds.width();
     }
     if (y < bounds.top()) {
         y += bounds.height();
     }
     return *src.getAddr32(x, y);
 }

bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
                                       const SkMatrix& ctm,
                                       SkBitmap* result, SkIPoint* loc) {
    if (countInputs() < 1) {
        return false;
    }

    const SkIRect srcBounds = SkIRect::MakeXYWH(loc->x(), loc->y(),
                                                src.width(), src.height());
    SkIRect bounds;
    if (!this->filterBounds(srcBounds, ctm, &bounds)) {
        return false;
    }

    const int x0 = bounds.left();
    const int y0 = bounds.top();

    SkAutoTUnref<SkDevice> dst(proxy->createDevice(bounds.width(), bounds.height()));
    if (NULL == dst) {
        return false;
    }
    SkCanvas canvas(dst);
    SkPaint paint;

    int inputCount = countInputs();
    for (int i = 0; i < inputCount; ++i) {
        SkBitmap tmp;
        const SkBitmap* srcPtr;
        SkIPoint pos = *loc;
        SkImageFilter* filter = getInput(i);
        if (filter) {
            if (!filter->filterImage(proxy, src, ctm, &tmp, &pos)) {
                return false;
            }
            srcPtr = &tmp;
        } else {
            srcPtr = &src;
        }

        if (fModes) {
            paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
        } else {
            paint.setXfermode(NULL);
        }
        canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint);
    }

    loc->set(bounds.left(), bounds.top());
    *result = dst->accessBitmap(false);
    return true;
}

bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                   SkBitmap* result, SkIPoint* offset) {
#if SK_SUPPORT_GPU
    SkBitmap input;
    SkASSERT(fInputCount == 1);
    if (!SkImageFilterUtils::GetInputResultGPU(this->getInput(0), proxy, src, ctm, &input, offset)) {
        return false;
    }
    GrTexture* srcTexture = input.getTexture();
    SkIRect bounds;
    src.getBounds(&bounds);
    if (!this->applyCropRect(&bounds, ctm)) {
        return false;
    }
    SkRect srcRect = SkRect::Make(bounds);
    SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
    GrContext* context = srcTexture->getContext();

    GrTextureDesc desc;
    desc.fFlags = kRenderTarget_GrTextureFlagBit,
    desc.fWidth = bounds.width();
    desc.fHeight = bounds.height();
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    GrAutoScratchTexture dst(context, desc);
    GrContext::AutoMatrix am;
    am.setIdentity(context);
    GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget());
    GrContext::AutoClip acs(context, dstRect);
    GrEffectRef* effect;
    SkMatrix matrix(ctm);
    matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    this->asNewEffect(&effect, srcTexture, matrix, bounds);
    SkASSERT(effect);
    SkAutoUnref effectRef(effect);
    GrPaint paint;
    paint.addColorEffect(effect);
    context->drawRectToRect(paint, dstRect, srcRect);

    SkAutoTUnref<GrTexture> resultTex(dst.detach());
    SkImageFilterUtils::WrapTexture(resultTex, bounds.width(), bounds.height(), result);
    offset->fX += bounds.left();
    offset->fY += bounds.top();
    return true;
#else
    return false;
#endif
}

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 SkPaintImageFilter::onFilterImage(Proxy* proxy,
                                            const SkBitmap& source,
                                            const Context& ctx,
                                            SkBitmap* result,
                                            SkIPoint* offset) const {
    SkIRect bounds;
    if (!this->applyCropRect(ctx, source, SkIPoint::Make(0, 0), &bounds)) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(),
                                                          bounds.height()));
    if (nullptr == device.get()) {
        return false;
    }
    SkCanvas canvas(device.get());

    SkMatrix matrix(ctx.ctm());
    matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    SkRect rect = SkRect::MakeWH(SkIntToScalar(bounds.width()), SkIntToScalar(bounds.height()));
    SkMatrix inverse;
    if (matrix.invert(&inverse)) {
        inverse.mapRect(&rect);
    }
    canvas.setMatrix(matrix);
    canvas.drawRect(rect, fPaint);

    *result = device.get()->accessBitmap(false);
    offset->fX = bounds.fLeft;
    offset->fY = bounds.fTop;
    return true;
}

bool SkRectShaderImageFilter::onFilterImage(Proxy* proxy,
                                            const SkBitmap& source,
                                            const Context& ctx,
                                            SkBitmap* result,
                                            SkIPoint* offset) const {
    SkIRect bounds;
    if (!this->applyCropRect(ctx, source, SkIPoint::Make(0, 0), &bounds)) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(),
                                                          bounds.height()));
    if (NULL == device.get()) {
        return false;
    }
    SkCanvas canvas(device.get());

    SkPaint paint;
    SkMatrix matrix(ctx.ctm());
    matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
    SkSafeUnref(paint.setShader(SkShader::CreateLocalMatrixShader(fShader, matrix)));

    SkRect rect = SkRect::MakeWH(SkIntToScalar(bounds.width()), SkIntToScalar(bounds.height()));
    canvas.drawRect(rect, paint);

    *result = device.get()->accessBitmap(false);
    offset->fX = bounds.fLeft;
    offset->fY = bounds.fTop;
    return true;
}

TiledPipeController::TiledPipeController(const SkBitmap& bitmap,
                                         SkPicture::InstallPixelRefProc proc,
                                         const SkMatrix* initial)
: INHERITED(NULL, proc) {
    int32_t top = 0;
    int32_t bottom;
    int32_t height = bitmap.height() / NumberOfTiles;
    SkIRect rect;
    for (int i = 0; i < NumberOfTiles; i++) {
        bottom = i + 1 == NumberOfTiles ? bitmap.height() : top + height;
        rect.setLTRB(0, top, bitmap.width(), bottom);
        top = bottom;

        SkDEBUGCODE(bool extracted = )bitmap.extractSubset(&fBitmaps[i], rect);
        SkASSERT(extracted);
        SkBaseDevice* device = new SkBitmapDevice(fBitmaps[i]);
        SkCanvas* canvas = new SkCanvas(device);
        device->unref();
        if (initial != NULL) {
            canvas->setMatrix(*initial);
        }
        canvas->translate(SkIntToScalar(-rect.left()),
                          SkIntToScalar(-rect.top()));
        if (0 == i) {
            fReader.setCanvas(canvas);
        } else {
            fReaders[i - 1].setCanvas(canvas);
            fReaders[i - 1].setBitmapDecoder(proc);
        }
        canvas->unref();
    }
}

    void validateBounds(SkCanvas* canvas) {
#ifdef SK_DEBUG
        SkIRect bounds = canvas->getDeviceClipBounds();
        SkASSERT(bounds.right()-bounds.left() >= W);
        SkASSERT(bounds.bottom()-bounds.top() >= H);
#endif
    }

static void call_proc_X(SkMorphologyImageFilter::Proc procX,
                        const SkBitmap& src, SkBitmap* dst,
                        int radiusX, const SkIRect& bounds) {
    procX(src.getAddr32(bounds.left(), bounds.top()), dst->getAddr32(0, 0),
          radiusX, bounds.width(), bounds.height(),
          src.rowBytesAsPixels(), dst->rowBytesAsPixels());
}

void SkRasterPipelineBlitter::blitMask(const SkMask& mask, const SkIRect& clip) {
    if (mask.fFormat == SkMask::kBW_Format) {
        // TODO: native BW masks?
        return INHERITED::blitMask(mask, clip);
    }

    int x = clip.left();
    for (int y = clip.top(); y < clip.bottom(); y++) {
        auto dst = fDst.writable_addr(0,y);

        SkRasterPipeline p;
        p.extend(fShader);
        p.extend(fColorFilter);
        this->append_load_d(&p, dst);
        p.extend(fXfermode);
        switch (mask.fFormat) {
            case SkMask::kA8_Format:
                p.append<lerp_a8, lerp_a8_1>(mask.getAddr8(x,y)-x);
                break;
            case SkMask::kLCD16_Format:
                p.append<lerp_lcd16, lerp_lcd16_1>(mask.getAddrLCD16(x,y)-x);
                break;
            default: break;
        }
        this->append_store(&p, dst);

        p.run(x, clip.width());
    }
}

Json::Value SkJSONCanvas::MakeIRect(const SkIRect& rect) {
    Json::Value result(Json::arrayValue);
    result.append(Json::Value(rect.left()));
    result.append(Json::Value(rect.top()));
    result.append(Json::Value(rect.right()));
    result.append(Json::Value(rect.bottom()));
    return result;
}