C++ SkBitmap::getAddr32方法代码示例

bool SkBicubicImageFilter::onFilterImage(Proxy* proxy,
                                         const SkBitmap& source,
                                         const SkMatrix& matrix,
                                         SkBitmap* result,
                                         SkIPoint* loc) {
    SkBitmap src = source;
    if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) {
        return false;
    }

    if (src.config() != SkBitmap::kARGB_8888_Config) {
        return false;
    }

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

    SkRect dstRect = SkRect::MakeWH(SkScalarMul(SkIntToScalar(src.width()), fScale.fWidth),
                                    SkScalarMul(SkIntToScalar(src.height()), fScale.fHeight));
    SkIRect dstIRect;
    dstRect.roundOut(&dstIRect);
    result->setConfig(src.config(), dstIRect.width(), dstIRect.height());
    result->allocPixels();
    if (!result->getPixels()) {
        return false;
    }

    SkRect srcRect;
    src.getBounds(&srcRect);
    SkMatrix inverse;
    inverse.setRectToRect(dstRect, srcRect, SkMatrix::kFill_ScaleToFit);
    inverse.postTranslate(SkFloatToScalar(-0.5f), SkFloatToScalar(-0.5f));

    for (int y = dstIRect.fTop; y < dstIRect.fBottom; ++y) {
        SkPMColor* dptr = result->getAddr32(dstIRect.fLeft, y);
        for (int x = dstIRect.fLeft; x < dstIRect.fRight; ++x) {
            SkPoint srcPt, dstPt = SkPoint::Make(SkIntToScalar(x), SkIntToScalar(y));
            inverse.mapPoints(&srcPt, &dstPt, 1);
            SkScalar fractx = srcPt.fX - SkScalarFloorToScalar(srcPt.fX);
            SkScalar fracty = srcPt.fY - SkScalarFloorToScalar(srcPt.fY);
            int sx = SkScalarFloorToInt(srcPt.fX);
            int sy = SkScalarFloorToInt(srcPt.fY);
            int x0 = SkClampMax(sx - 1, src.width() - 1);
            int x1 = SkClampMax(sx    , src.width() - 1);
            int x2 = SkClampMax(sx + 1, src.width() - 1);
            int x3 = SkClampMax(sx + 2, src.width() - 1);
            int y0 = SkClampMax(sy - 1, src.height() - 1);
            int y1 = SkClampMax(sy    , src.height() - 1);
            int y2 = SkClampMax(sy + 1, src.height() - 1);
            int y3 = SkClampMax(sy + 2, src.height() - 1);
            SkPMColor s00 = *src.getAddr32(x0, y0);
            SkPMColor s10 = *src.getAddr32(x1, y0);
            SkPMColor s20 = *src.getAddr32(x2, y0);
            SkPMColor s30 = *src.getAddr32(x3, y0);
            SkPMColor s0 = cubicBlend(fCoefficients, fractx, s00, s10, s20, s30);
            SkPMColor s01 = *src.getAddr32(x0, y1);
            SkPMColor s11 = *src.getAddr32(x1, y1);
            SkPMColor s21 = *src.getAddr32(x2, y1);
            SkPMColor s31 = *src.getAddr32(x3, y1);
            SkPMColor s1 = cubicBlend(fCoefficients, fractx, s01, s11, s21, s31);
            SkPMColor s02 = *src.getAddr32(x0, y2);
            SkPMColor s12 = *src.getAddr32(x1, y2);
            SkPMColor s22 = *src.getAddr32(x2, y2);
            SkPMColor s32 = *src.getAddr32(x3, y2);
            SkPMColor s2 = cubicBlend(fCoefficients, fractx, s02, s12, s22, s32);
            SkPMColor s03 = *src.getAddr32(x0, y3);
            SkPMColor s13 = *src.getAddr32(x1, y3);
            SkPMColor s23 = *src.getAddr32(x2, y3);
            SkPMColor s33 = *src.getAddr32(x3, y3);
            SkPMColor s3 = cubicBlend(fCoefficients, fractx, s03, s13, s23, s33);
            *dptr++ = cubicBlend(fCoefficients, fracty, s0, s1, s2, s3);
        }
    }
    return true;
}

 static inline SkPMColor fetch(const SkBitmap& src, int x, int y) {
     return *src.getAddr32(x, y);
 }

bool SkBlurImageFilter::onFilterImageDeprecated(Proxy* proxy,
                                                const SkBitmap& source, const Context& ctx,
                                                SkBitmap* dst, SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInputDeprecated(0, proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

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

    SkIRect srcBounds = src.bounds();
    srcBounds.offset(srcOffset);
    SkIRect dstBounds;
    if (!this->applyCropRect(this->mapContext(ctx), srcBounds, &dstBounds)) {
        return false;
    }
    if (!srcBounds.intersect(dstBounds)) {
        return false;
    }

    SkVector sigma = map_sigma(fSigma, ctx.ctm());

    int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
    int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
    getBox3Params(sigma.x(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
    getBox3Params(sigma.y(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);

    if (kernelSizeX < 0 || kernelSizeY < 0) {
        return false;
    }

    if (kernelSizeX == 0 && kernelSizeY == 0) {
        src.extractSubset(dst, srcBounds);
        offset->fX = srcBounds.x();
        offset->fY = srcBounds.y();
        return true;
    }

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

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

    SkAutoTUnref<SkBaseDevice> tempDevice(proxy->createDevice(dst->width(), dst->height()));
    if (!tempDevice) {
        return false;
    }
    SkBitmap temp = tempDevice->accessBitmap(false);
    SkAutoLockPixels alpTemp(temp);

    offset->fX = dstBounds.fLeft;
    offset->fY = dstBounds.fTop;
    SkPMColor* t = temp.getAddr32(0, 0);
    SkPMColor* d = dst->getAddr32(0, 0);
    int w = dstBounds.width(), h = dstBounds.height();
    const SkPMColor* s = src.getAddr32(srcBounds.x() - srcOffset.x(), srcBounds.y() - srcOffset.y());
    srcBounds.offset(-dstBounds.x(), -dstBounds.y());
    dstBounds.offset(-dstBounds.x(), -dstBounds.y());
    SkIRect srcBoundsT = SkIRect::MakeLTRB(srcBounds.top(), srcBounds.left(), srcBounds.bottom(), srcBounds.right());
    SkIRect dstBoundsT = SkIRect::MakeWH(dstBounds.height(), dstBounds.width());
    int sw = src.rowBytesAsPixels();

    /**
     *
     * In order to make memory accesses cache-friendly, we reorder the passes to
     * use contiguous memory reads wherever possible.
     *
     * For example, the 6 passes of the X-and-Y blur case are rewritten as
     * follows. Instead of 3 passes in X and 3 passes in Y, we perform
     * 2 passes in X, 1 pass in X transposed to Y on write, 2 passes in X,
     * then 1 pass in X transposed to Y on write.
     *
     * +----+       +----+       +----+        +---+       +---+       +---+        +----+
     * + AB + ----> | AB | ----> | AB | -----> | A | ----> | A | ----> | A | -----> | AB |
     * +----+ blurX +----+ blurX +----+ blurXY | B | blurX | B | blurX | B | blurXY +----+
     *                                         +---+       +---+       +---+
     *
     * In this way, two of the y-blurs become x-blurs applied to transposed
     * images, and all memory reads are contiguous.
     */
    if (kernelSizeX > 0 && kernelSizeY > 0) {
        SkOpts::box_blur_xx(s, sw,  srcBounds,  t, kernelSizeX,  lowOffsetX,  highOffsetX, w, h);
        SkOpts::box_blur_xx(t,  w,  dstBounds,  d, kernelSizeX,  highOffsetX, lowOffsetX,  w, h);
        SkOpts::box_blur_xy(d,  w,  dstBounds,  t, kernelSizeX3, highOffsetX, highOffsetX, w, h);
        SkOpts::box_blur_xx(t,  h,  dstBoundsT, d, kernelSizeY,  lowOffsetY,  highOffsetY, h, w);
        SkOpts::box_blur_xx(d,  h,  dstBoundsT, t, kernelSizeY,  highOffsetY, lowOffsetY,  h, w);
        SkOpts::box_blur_xy(t,  h,  dstBoundsT, d, kernelSizeY3, highOffsetY, highOffsetY, h, w);
    } else if (kernelSizeX > 0) {
        SkOpts::box_blur_xx(s, sw,  srcBounds,  d, kernelSizeX,  lowOffsetX,  highOffsetX, w, h);
        SkOpts::box_blur_xx(d,  w,  dstBounds,  t, kernelSizeX,  highOffsetX, lowOffsetX,  w, h);
//.........这里部分代码省略.........

sk_sp<SkSpecialImage> SkMorphologyImageFilter::onFilterImage(SkSpecialImage* source,
                                                             const Context& ctx,
                                                             SkIPoint* offset) const {
    SkIPoint inputOffset = SkIPoint::Make(0, 0);
    sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
    if (!input) {
        return nullptr;
    }

    SkIRect bounds;
    input = this->applyCropRectAndPad(this->mapContext(ctx), input.get(), &inputOffset, &bounds);
    if (!input) {
        return nullptr;
    }

    SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                     SkIntToScalar(this->radius().height()));
    ctx.ctm().mapVectors(&radius, 1);
    int width = SkScalarFloorToInt(radius.fX);
    int height = SkScalarFloorToInt(radius.fY);

    if (width < 0 || height < 0) {
        return nullptr;
    }

    SkIRect srcBounds = bounds;
    srcBounds.offset(-inputOffset);

    if (0 == width && 0 == height) {
        offset->fX = bounds.left();
        offset->fY = bounds.top();
        return input->makeSubset(srcBounds);
    }

#if SK_SUPPORT_GPU
    if (source->isTextureBacked()) {
        GrContext* context = source->getContext();

        // Ensure the input is in the destination color space. Typically applyCropRect will have
        // called pad_image to account for our dilation of bounds, so the result will already be
        // moved to the destination color space. If a filter DAG avoids that, then we use this
        // fall-back, which saves us from having to do the xform during the filter itself.
        input = ImageToColorSpace(input.get(), ctx.outputProperties());

        auto type = (kDilate_Op == this->op()) ? GrMorphologyEffect::Type::kDilate
                                               : GrMorphologyEffect::Type::kErode;
        sk_sp<SkSpecialImage> result(apply_morphology(context, input.get(), srcBounds, type,
                                                      SkISize::Make(width, height),
                                                      ctx.outputProperties()));
        if (result) {
            offset->fX = bounds.left();
            offset->fY = bounds.top();
        }
        return result;
    }
#endif

    SkBitmap inputBM;

    if (!input->getROPixels(&inputBM)) {
        return nullptr;
    }

    if (inputBM.colorType() != kN32_SkColorType) {
        return nullptr;
    }

    SkImageInfo info = SkImageInfo::Make(bounds.width(), bounds.height(),
                                         inputBM.colorType(), inputBM.alphaType());

    SkBitmap dst;
    if (!dst.tryAllocPixels(info)) {
        return nullptr;
    }

    SkMorphologyImageFilter::Proc procX, procY;

    if (kDilate_Op == this->op()) {
        procX = SkOpts::dilate_x;
        procY = SkOpts::dilate_y;
    } else {
        procX = SkOpts::erode_x;
        procY = SkOpts::erode_y;
    }

    if (width > 0 && height > 0) {
        SkBitmap tmp;
        if (!tmp.tryAllocPixels(info)) {
            return nullptr;
        }

        call_proc_X(procX, inputBM, &tmp, width, srcBounds);
        SkIRect tmpBounds = SkIRect::MakeWH(srcBounds.width(), srcBounds.height());
        call_proc_Y(procY,
                    tmp.getAddr32(tmpBounds.left(), tmpBounds.top()), tmp.rowBytesAsPixels(),
                    &dst, height, tmpBounds);
    } else if (width > 0) {
        call_proc_X(procX, inputBM, &dst, width, srcBounds);
    } else if (height > 0) {
        call_proc_Y(procY,
//.........这里部分代码省略.........

/**
 * Render the SKP file(s) within inputPath, writing their bitmap images into outputDir.
 *
 * @param inputPath path to an individual SKP file, or a directory of SKP files
 * @param outputDir if not NULL, write the image(s) generated into this directory
 * @param renderer PictureRenderer to use to render the SKPs
 * @param jsonSummaryPtr if not NULL, add the image(s) generated to this summary
 */
static bool render_picture(const SkString& inputPath, const SkString* outputDir,
                           sk_tools::PictureRenderer& renderer,
                           sk_tools::ImageResultsSummary *jsonSummaryPtr) {
    int diffs[256] = {0};
    SkBitmap* bitmap = NULL;
    renderer.setJsonSummaryPtr(jsonSummaryPtr);
    bool success = render_picture_internal(inputPath,
        FLAGS_writeWholeImage ? NULL : outputDir,
        renderer,
        FLAGS_validate || FLAGS_writeWholeImage ? &bitmap : NULL);

    if (!success || ((FLAGS_validate || FLAGS_writeWholeImage) && bitmap == NULL)) {
        SkDebugf("Failed to draw the picture.\n");
        SkDELETE(bitmap);
        return false;
    }

    if (FLAGS_validate) {
        SkBitmap* referenceBitmap = NULL;
        sk_tools::PictureRenderer* referenceRenderer;
        // If the renderer uses a BBoxHierarchy, then the reference renderer
        // will be the same renderer, without the bbh.
        AutoRestoreBbhType arbbh;
        if (sk_tools::PictureRenderer::kNone_BBoxHierarchyType !=
            renderer.getBBoxHierarchyType()) {
            referenceRenderer = &renderer;
            referenceRenderer->ref();  // to match auto unref below
            arbbh.set(referenceRenderer, sk_tools::PictureRenderer::kNone_BBoxHierarchyType);
        } else {
            referenceRenderer = SkNEW(sk_tools::SimplePictureRenderer);
        }
        SkAutoTUnref<sk_tools::PictureRenderer> aurReferenceRenderer(referenceRenderer);

        success = render_picture_internal(inputPath, NULL, *referenceRenderer,
                                          &referenceBitmap);

        if (!success || NULL == referenceBitmap || NULL == referenceBitmap->getPixels()) {
            SkDebugf("Failed to draw the reference picture.\n");
            SkDELETE(bitmap);
            SkDELETE(referenceBitmap);
            return false;
        }

        if (success && (bitmap->width() != referenceBitmap->width())) {
            SkDebugf("Expected image width: %i, actual image width %i.\n",
                     referenceBitmap->width(), bitmap->width());
            SkDELETE(bitmap);
            SkDELETE(referenceBitmap);
            return false;
        }
        if (success && (bitmap->height() != referenceBitmap->height())) {
            SkDebugf("Expected image height: %i, actual image height %i",
                     referenceBitmap->height(), bitmap->height());
            SkDELETE(bitmap);
            SkDELETE(referenceBitmap);
            return false;
        }

        for (int y = 0; success && y < bitmap->height(); y++) {
            for (int x = 0; success && x < bitmap->width(); x++) {
                int diff = MaxByteDiff(*referenceBitmap->getAddr32(x, y),
                                       *bitmap->getAddr32(x, y));
                SkASSERT(diff >= 0 && diff <= 255);
                diffs[diff]++;

                if (diff > FLAGS_maxComponentDiff) {
                    SkDebugf("Expected pixel at (%i %i) exceedds maximum "
                                 "component diff of %i: 0x%x, actual 0x%x\n",
                             x, y, FLAGS_maxComponentDiff,
                             *referenceBitmap->getAddr32(x, y),
                             *bitmap->getAddr32(x, y));
                    SkDELETE(bitmap);
                    SkDELETE(referenceBitmap);
                    return false;
                }
            }
        }
        SkDELETE(referenceBitmap);

        for (int i = 1; i <= 255; ++i) {
            if(diffs[i] > 0) {
                SkDebugf("Number of pixels with max diff of %i is %i\n", i, diffs[i]);
            }
        }
    }

    if (FLAGS_writeWholeImage) {
        sk_tools::force_all_opaque(*bitmap);

        SkString inputFilename, outputPath;
        sk_tools::get_basename(&inputFilename, inputPath);
        sk_tools::make_filepath(&outputPath, *outputDir, inputFilename);
//.........这里部分代码省略.........

bool SkMagnifierImageFilter::onFilterImage(Proxy*, const SkBitmap& src,
                                           const Context&, SkBitmap* dst,
                                           SkIPoint* offset) const {
    if ((src.colorType() != kN32_SkColorType) ||
        (fSrcRect.width() >= src.width()) ||
        (fSrcRect.height() >= src.height())) {
      return false;
    }

    SkAutoLockPixels alp(src);
    SkASSERT(src.getPixels());
    if (!src.getPixels() || src.width() <= 0 || src.height() <= 0) {
      return false;
    }

    if (!dst->tryAllocPixels(src.info())) {
        return false;
    }

    SkScalar inv_inset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1;

    SkScalar inv_x_zoom = fSrcRect.width() / src.width();
    SkScalar inv_y_zoom = fSrcRect.height() / src.height();

    SkColor* sptr = src.getAddr32(0, 0);
    SkColor* dptr = dst->getAddr32(0, 0);
    int width = src.width(), height = src.height();
    for (int y = 0; y < height; ++y) {
        for (int x = 0; x < width; ++x) {
            SkScalar x_dist = SkMin32(x, width - x - 1) * inv_inset;
            SkScalar y_dist = SkMin32(y, height - y - 1) * inv_inset;
            SkScalar weight = 0;

            static const SkScalar kScalar2 = SkScalar(2);

            // To create a smooth curve at the corners, we need to work on
            // a square twice the size of the inset.
            if (x_dist < kScalar2 && y_dist < kScalar2) {
                x_dist = kScalar2 - x_dist;
                y_dist = kScalar2 - y_dist;

                SkScalar dist = SkScalarSqrt(SkScalarSquare(x_dist) +
                                             SkScalarSquare(y_dist));
                dist = SkMaxScalar(kScalar2 - dist, 0);
                weight = SkMinScalar(SkScalarSquare(dist), SK_Scalar1);
            } else {
                SkScalar sqDist = SkMinScalar(SkScalarSquare(x_dist),
                                              SkScalarSquare(y_dist));
                weight = SkMinScalar(sqDist, SK_Scalar1);
            }

            SkScalar x_interp = SkScalarMul(weight, (fSrcRect.x() + x * inv_x_zoom)) +
                           (SK_Scalar1 - weight) * x;
            SkScalar y_interp = SkScalarMul(weight, (fSrcRect.y() + y * inv_y_zoom)) +
                           (SK_Scalar1 - weight) * y;

            int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1);
            int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1);

            *dptr = sptr[y_val * width + x_val];
            dptr++;
        }
    }
    return true;
}

void putImageData(ByteArray*& source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint,
                  SkDevice* dstDevice, const IntSize& size)
{
    ASSERT(sourceRect.width() > 0);
    ASSERT(sourceRect.height() > 0);

    int originX = sourceRect.x();
    int destX = destPoint.x() + sourceRect.x();
    ASSERT(destX >= 0);
    ASSERT(destX < size.width());
    ASSERT(originX >= 0);
    ASSERT(originX < sourceRect.maxX());

    int endX = destPoint.x() + sourceRect.maxX();
    ASSERT(endX <= size.width());

    int numColumns = endX - destX;

    int originY = sourceRect.y();
    int destY = destPoint.y() + sourceRect.y();
    ASSERT(destY >= 0);
    ASSERT(destY < size.height());
    ASSERT(originY >= 0);
    ASSERT(originY < sourceRect.maxY());

    int endY = destPoint.y() + sourceRect.maxY();
    ASSERT(endY <= size.height());
    int numRows = endY - destY;

    unsigned srcBytesPerRow = 4 * sourceSize.width();

    SkBitmap deviceBitmap = dstDevice->accessBitmap(true);
    SkAutoLockPixels deviceAutoLock(deviceBitmap);

    // If the device's bitmap doesn't have pixels we will make a temp and call writePixels on the device.
    bool temporaryBitmap = !deviceBitmap.getPixels();
    SkBitmap destBitmap;

    if (temporaryBitmap) {
        destBitmap.setConfig(SkBitmap::kARGB_8888_Config, numColumns, numRows, srcBytesPerRow);
        if (!destBitmap.allocPixels())
            CRASH();
    } else
        deviceBitmap.extractSubset(&destBitmap, SkIRect::MakeXYWH(destX, destY, numColumns, numRows));

    // Whether we made a temporary or not destBitmap is always configured to be written at 0,0
    SkAutoLockPixels destAutoLock(destBitmap);
    const unsigned char* srcRow = source->data() + originY * srcBytesPerRow + originX * 4;
    for (int y = 0; y < numRows; ++y) {
        SkPMColor* destRow = destBitmap.getAddr32(0, y);
        for (int x = 0; x < numColumns; ++x) {
            const unsigned char* srcPixel = &srcRow[x * 4];
            if (multiplied == Unmultiplied) {
                unsigned char alpha = srcPixel[3];
                unsigned char r = SkMulDiv255Ceiling(srcPixel[0], alpha);
                unsigned char g = SkMulDiv255Ceiling(srcPixel[1], alpha);
                unsigned char b = SkMulDiv255Ceiling(srcPixel[2], alpha);
                destRow[x] = SkPackARGB32(alpha, r, g, b);
            } else
                destRow[x] = SkPackARGB32(srcPixel[3], srcPixel[0], srcPixel[1], srcPixel[2]);
        }
        srcRow += srcBytesPerRow;
    }

    // If we used a temporary then write it to the device
    if (temporaryBitmap)
        dstDevice->writePixels(destBitmap, destX, destY);
}

sk_sp<SkSpecialImage> SkMagnifierImageFilter::onFilterImage(SkSpecialImage* source,
                                                            const Context& ctx,
                                                            SkIPoint* offset) const {
    SkIPoint inputOffset = SkIPoint::Make(0, 0);
    sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
    if (!input) {
        return nullptr;
    }

    const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(),
                                                  input->width(), input->height());

    SkIRect bounds;
    if (!this->applyCropRect(ctx, inputBounds, &bounds)) {
        return nullptr;
    }

    SkScalar invInset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1;

    SkScalar invXZoom = fSrcRect.width() / bounds.width();
    SkScalar invYZoom = fSrcRect.height() / bounds.height();


#if SK_SUPPORT_GPU
    if (source->isTextureBacked()) {
        GrContext* context = source->getContext();

        sk_sp<GrTexture> inputTexture(input->asTextureRef(context));
        SkASSERT(inputTexture);

        offset->fX = bounds.left();
        offset->fY = bounds.top();
        bounds.offset(-inputOffset);

        SkScalar yOffset = inputTexture->origin() == kTopLeft_GrSurfaceOrigin 
            ? fSrcRect.y()
            : inputTexture->height() - 
                      fSrcRect.height() * inputTexture->height() / bounds.height() - fSrcRect.y();
        int boundsY = inputTexture->origin() == kTopLeft_GrSurfaceOrigin
            ? bounds.y()
            : inputTexture->height() - bounds.height();
        SkRect effectBounds = SkRect::MakeXYWH(
            SkIntToScalar(bounds.x()) / inputTexture->width(),
            SkIntToScalar(boundsY) / inputTexture->height(),
            SkIntToScalar(inputTexture->width()) / bounds.width(),
            SkIntToScalar(inputTexture->height()) / bounds.height());
        // SRGBTODO: Handle sRGB here
        sk_sp<GrFragmentProcessor> fp(GrMagnifierEffect::Create(
                                                        inputTexture.get(),
                                                        effectBounds,
                                                        fSrcRect.x() / inputTexture->width(),
                                                        yOffset / inputTexture->height(),
                                                        invXZoom,
                                                        invYZoom,
                                                        bounds.width() * invInset,
                                                        bounds.height() * invInset));
        if (!fp) {
            return nullptr;
        }

        return DrawWithFP(context, std::move(fp), bounds);
    }
#endif

    SkBitmap inputBM;

    if (!input->getROPixels(&inputBM)) {
        return nullptr;
    }

    if ((inputBM.colorType() != kN32_SkColorType) ||
        (fSrcRect.width() >= inputBM.width()) || (fSrcRect.height() >= inputBM.height())) {
        return nullptr;
    }

    SkAutoLockPixels alp(inputBM);
    SkASSERT(inputBM.getPixels());
    if (!inputBM.getPixels() || inputBM.width() <= 0 || inputBM.height() <= 0) {
        return nullptr;
    }

    const SkImageInfo info = SkImageInfo::MakeN32Premul(bounds.width(), bounds.height());

    SkBitmap dst;
    if (!dst.tryAllocPixels(info)) {
        return nullptr;
    }

    SkAutoLockPixels dstLock(dst);

    SkColor* dptr = dst.getAddr32(0, 0);
    int dstWidth = dst.width(), dstHeight = dst.height();
    for (int y = 0; y < dstHeight; ++y) {
        for (int x = 0; x < dstWidth; ++x) {
            SkScalar x_dist = SkMin32(x, dstWidth - x - 1) * invInset;
            SkScalar y_dist = SkMin32(y, dstHeight - y - 1) * invInset;
            SkScalar weight = 0;

            static const SkScalar kScalar2 = SkScalar(2);

//.........这里部分代码省略.........

sk_sp<SkSpecialImage> SkMorphologyImageFilter::filterImageGeneric(bool dilate,
                                                                  SkSpecialImage* source,
                                                                  const Context& ctx,
                                                                  SkIPoint* offset) const {
    SkIPoint inputOffset = SkIPoint::Make(0, 0);
    sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
    if (!input) {
        return nullptr;
    }

    SkIRect bounds;
    input = this->applyCropRect(this->mapContext(ctx), input.get(), &inputOffset, &bounds);
    if (!input) {
        return nullptr;
    }

    SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                     SkIntToScalar(this->radius().height()));
    ctx.ctm().mapVectors(&radius, 1);
    int width = SkScalarFloorToInt(radius.fX);
    int height = SkScalarFloorToInt(radius.fY);

    if (width < 0 || height < 0) {
        return nullptr;
    }

    SkIRect srcBounds = bounds;
    srcBounds.offset(-inputOffset);

    if (0 == width && 0 == height) {
        offset->fX = bounds.left();
        offset->fY = bounds.top();
        return input->makeSubset(srcBounds);
    }

#if SK_SUPPORT_GPU
    if (input->peekTexture() && input->peekTexture()->getContext()) {
        auto type = dilate ? GrMorphologyEffect::kDilate_MorphologyType
                           : GrMorphologyEffect::kErode_MorphologyType;
        sk_sp<SkSpecialImage> result(apply_morphology(input.get(), srcBounds, type,
                                                      SkISize::Make(width, height)));
        if (result) {
            offset->fX = bounds.left();
            offset->fY = bounds.top();
        }
        return result;
    }
#endif

    SkPixmap inputPixmap;

    if (!input->peekPixels(&inputPixmap)) {
        return nullptr;
    }

    if (inputPixmap.colorType() != kN32_SkColorType) {
        return nullptr;
    }

    SkImageInfo info = SkImageInfo::Make(bounds.width(), bounds.height(),
                                         inputPixmap.colorType(), inputPixmap.alphaType());

    SkBitmap dst;
    if (!dst.tryAllocPixels(info)) {
        return nullptr;
    }

    SkAutoLockPixels dstLock(dst);

    SkMorphologyImageFilter::Proc procX, procY;

    if (dilate) {
        procX = SkOpts::dilate_x;
        procY = SkOpts::dilate_y;
    } else {
        procX = SkOpts::erode_x;
        procY = SkOpts::erode_y;
    }

    if (width > 0 && height > 0) {
        SkBitmap tmp;
        if (!tmp.tryAllocPixels(info)) {
            return nullptr;
        }

        SkAutoLockPixels tmpLock(tmp);

        call_proc_X(procX, inputPixmap, &tmp, width, srcBounds);
        SkIRect tmpBounds = SkIRect::MakeWH(srcBounds.width(), srcBounds.height());
        call_proc_Y(procY,
                    tmp.getAddr32(tmpBounds.left(), tmpBounds.top()), tmp.rowBytesAsPixels(),
                    &dst, height, tmpBounds);
    } else if (width > 0) {
        call_proc_X(procX, inputPixmap, &dst, width, srcBounds);
    } else if (height > 0) {
        call_proc_Y(procY,
                    inputPixmap.addr32(srcBounds.left(), srcBounds.top()),
                    inputPixmap.rowBytesAsPixels(),
                    &dst, height, srcBounds);
    }
//.........这里部分代码省略.........

PassRefPtr<ByteArray> getImageData(const IntRect& rect, SkDevice& srcDevice,
                                   const IntSize& size)
{
    RefPtr<ByteArray> result = ByteArray::create(rect.width() * rect.height() * 4);

    SkBitmap::Config srcConfig = srcDevice.accessBitmap(false).config();

    if (srcConfig == SkBitmap::kNo_Config) {
        // This is an empty SkBitmap that could not be configured.
        ASSERT(!size.width() || !size.height());
        return result.release();
    }

    unsigned char* data = result->data();

    if (rect.x() < 0
        || rect.y() < 0
        || rect.maxX() > size.width()
        || rect.maxY() > size.height())
        memset(data, 0, result->length());

    int originX = rect.x();
    int destX = 0;
    if (originX < 0) {
        destX = -originX;
        originX = 0;
    }
    int endX = rect.maxX();
    if (endX > size.width())
        endX = size.width();
    int numColumns = endX - originX;

    if (numColumns <= 0)
        return result.release();

    int originY = rect.y();
    int destY = 0;
    if (originY < 0) {
        destY = -originY;
        originY = 0;
    }
    int endY = rect.maxY();
    if (endY > size.height())
        endY = size.height();
    int numRows = endY - originY;

    if (numRows <= 0)
        return result.release();

    ASSERT(srcConfig == SkBitmap::kARGB_8888_Config);

    unsigned destBytesPerRow = 4 * rect.width();

    SkBitmap srcBitmap;
    srcDevice.readPixels(SkIRect::MakeXYWH(originX, originY, numColumns, numRows), &srcBitmap);

    unsigned char* destRow = data + destY * destBytesPerRow + destX * 4;

    // Do conversion of byte order and alpha divide (if necessary)
    for (int y = 0; y < numRows; ++y) {
        SkPMColor* srcBitmapRow = srcBitmap.getAddr32(0, y);
        for (int x = 0; x < numColumns; ++x) {
            SkPMColor srcPMColor = srcBitmapRow[x];
            unsigned char* destPixel = &destRow[x * 4];
            if (multiplied == Unmultiplied) {
                unsigned char a = SkGetPackedA32(srcPMColor);
                destPixel[0] = a ? SkGetPackedR32(srcPMColor) * 255 / a : 0;
                destPixel[1] = a ? SkGetPackedG32(srcPMColor) * 255 / a : 0;
                destPixel[2] = a ? SkGetPackedB32(srcPMColor) * 255 / a : 0;
                destPixel[3] = a;
            } else {
                // Input and output are both pre-multiplied, we just need to re-arrange the
                // bytes from the bitmap format to RGBA.
                destPixel[0] = SkGetPackedR32(srcPMColor);
                destPixel[1] = SkGetPackedG32(srcPMColor);
                destPixel[2] = SkGetPackedB32(srcPMColor);
                destPixel[3] = SkGetPackedA32(srcPMColor);
            }
        }
        destRow += destBytesPerRow;
    }

    return result.release();
}

PassRefPtr<ImageData> getImageData(const IntRect& rect, const SkBitmap& bitmap, 
                                   const IntSize& size)
{
    RefPtr<ImageData> result = ImageData::create(rect.width(), rect.height());

    if (bitmap.config() == SkBitmap::kNo_Config) {
        // This is an empty SkBitmap that could not be configured.
        ASSERT(!size.width() || !size.height());
        return result;
    }

    unsigned char* data = result->data()->data()->data();

    if (rect.x() < 0 || rect.y() < 0 ||
        (rect.x() + rect.width()) > size.width() ||
        (rect.y() + rect.height()) > size.height())
        memset(data, 0, result->data()->length());

    int originX = rect.x();
    int destX = 0;
    if (originX < 0) {
        destX = -originX;
        originX = 0;
    }
    int endX = rect.x() + rect.width();
    if (endX > size.width())
        endX = size.width();
    int numColumns = endX - originX;

    int originY = rect.y();
    int destY = 0;
    if (originY < 0) {
        destY = -originY;
        originY = 0;
    }
    int endY = rect.y() + rect.height();
    if (endY > size.height())
        endY = size.height();
    int numRows = endY - originY;

    ASSERT(bitmap.config() == SkBitmap::kARGB_8888_Config);
    SkAutoLockPixels bitmapLock(bitmap);

    unsigned destBytesPerRow = 4 * rect.width();
    unsigned char* destRow = data + destY * destBytesPerRow + destX * 4;

    for (int y = 0; y < numRows; ++y) {
        uint32_t* srcRow = bitmap.getAddr32(originX, originY + y);
        for (int x = 0; x < numColumns; ++x) {
            unsigned char* destPixel = &destRow[x * 4];
            if (multiplied == Unmultiplied) {
                SkColor color = srcRow[x];
                unsigned a = SkColorGetA(color);
                destPixel[0] = a ? SkColorGetR(color) * 255 / a : 0;
                destPixel[1] = a ? SkColorGetG(color) * 255 / a : 0;
                destPixel[2] = a ? SkColorGetB(color) * 255 / a : 0;
                destPixel[3] = a;
            } else {
                // Input and output are both pre-multiplied, we just need to re-arrange the
                // bytes from the bitmap format to RGBA.
                destPixel[0] = SkGetPackedR32(srcRow[x]);
                destPixel[1] = SkGetPackedG32(srcRow[x]);
                destPixel[2] = SkGetPackedB32(srcRow[x]);
                destPixel[3] = SkGetPackedA32(srcRow[x]);
            }
        }
        destRow += destBytesPerRow;
    }

    return result;
}

 static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) {
     x = SkTPin(x, bounds.fLeft, bounds.fRight - 1);
     y = SkTPin(y, bounds.fTop, bounds.fBottom - 1);
     return *src.getAddr32(x, y);
 }

static int pathsDrawTheSame(const SkPath& one, const SkPath& two,
        SkBitmap& bits, SkPath& scaledOne, SkPath& scaledTwo, int& error2x2) {
    const int bitWidth = 64;
    const int bitHeight = 64;
    if (bits.width() == 0) {
        bits.setConfig(SkBitmap::kARGB_8888_Config, bitWidth * 2, bitHeight);
        bits.allocPixels();
    }

    SkRect larger = one.getBounds();
    larger.join(two.getBounds());
    SkScalar largerWidth = larger.width();
    if (largerWidth < 4) {
        largerWidth = 4;
    }
    SkScalar largerHeight = larger.height();
    if (largerHeight < 4) {
        largerHeight = 4;
    }
    SkScalar hScale = (bitWidth - 2) / largerWidth;
    SkScalar vScale = (bitHeight - 2) / largerHeight;
    SkMatrix scale;
    scale.reset();
    scale.preScale(hScale, vScale);
    one.transform(scale, &scaledOne);
    two.transform(scale, &scaledTwo);
    const SkRect& bounds1 = scaledOne.getBounds();

    SkCanvas canvas(bits);
    canvas.drawColor(SK_ColorWHITE);
    SkPaint paint;
    canvas.save();
    canvas.translate(-bounds1.fLeft + 1, -bounds1.fTop + 1);
    canvas.drawPath(scaledOne, paint);
    canvas.restore();
    canvas.save();
    canvas.translate(-bounds1.fLeft + 1 + bitWidth, -bounds1.fTop + 1);
    canvas.drawPath(scaledTwo, paint);
    canvas.restore();
    int errors2 = 0;
    int errors = 0;
    for (int y = 0; y < bitHeight - 1; ++y) {
        uint32_t* addr1 = bits.getAddr32(0, y);
        uint32_t* addr2 = bits.getAddr32(0, y + 1);
        uint32_t* addr3 = bits.getAddr32(bitWidth, y);
        uint32_t* addr4 = bits.getAddr32(bitWidth, y + 1);
        for (int x = 0; x < bitWidth - 1; ++x) {
            // count 2x2 blocks
            bool err = addr1[x] != addr3[x];
            if (err) {
                errors2 += addr1[x + 1] != addr3[x + 1]
                        && addr2[x] != addr4[x] && addr2[x + 1] != addr4[x + 1];
                errors++;
            }
        }
    }
    if (errors2 >= 6 || errors > 160) {
        SkDebugf("%s errors2=%d errors=%d\n", __FUNCTION__, errors2, errors);
    }
    error2x2 = errors2;
    return errors;
}

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

/**
 * Render the SKP file(s) within inputPath.
 *
 * @param inputPath path to an individual SKP file, or a directory of SKP files
 * @param writePath if not NULL, write all image(s) generated into this directory
 * @param mismatchPath if not NULL, write any image(s) not matching expectations into this directory
 * @param renderer PictureRenderer to use to render the SKPs
 * @param jsonSummaryPtr if not NULL, add the image(s) generated to this summary
 */
static bool render_picture(const SkString& inputPath, const SkString* writePath,
                           const SkString* mismatchPath, sk_tools::PictureRenderer& renderer,
                           sk_tools::ImageResultsAndExpectations *jsonSummaryPtr) {
    int diffs[256] = {0};
    SkBitmap* bitmap = NULL;
    renderer.setJsonSummaryPtr(jsonSummaryPtr);
    bool success = render_picture_internal(inputPath,
        FLAGS_writeWholeImage ? NULL : writePath,
        FLAGS_writeWholeImage ? NULL : mismatchPath,
        renderer,
        FLAGS_validate || FLAGS_writeWholeImage ? &bitmap : NULL);

    if (!success || ((FLAGS_validate || FLAGS_writeWholeImage) && bitmap == NULL)) {
        SkDebugf("Failed to draw the picture.\n");
        delete bitmap;
        return false;
    }

    if (FLAGS_validate) {
        SkBitmap* referenceBitmap = NULL;
        sk_tools::PictureRenderer* referenceRenderer;
        // If the renderer uses a BBoxHierarchy, then the reference renderer
        // will be the same renderer, without the bbh.
        AutoRestoreBbhType arbbh;
        if (sk_tools::PictureRenderer::kNone_BBoxHierarchyType !=
            renderer.getBBoxHierarchyType()) {
            referenceRenderer = &renderer;
            referenceRenderer->ref();  // to match auto unref below
            arbbh.set(referenceRenderer, sk_tools::PictureRenderer::kNone_BBoxHierarchyType);
        } else {
#if SK_SUPPORT_GPU
            referenceRenderer = new sk_tools::SimplePictureRenderer(renderer.getGrContextOptions());
#else
            referenceRenderer = new sk_tools::SimplePictureRenderer;
#endif
        }
        SkAutoTUnref<sk_tools::PictureRenderer> aurReferenceRenderer(referenceRenderer);

        success = render_picture_internal(inputPath, NULL, NULL, *referenceRenderer,
                                          &referenceBitmap);

        if (!success || NULL == referenceBitmap || NULL == referenceBitmap->getPixels()) {
            SkDebugf("Failed to draw the reference picture.\n");
            delete bitmap;
            delete referenceBitmap;
            return false;
        }

        if (success && (bitmap->width() != referenceBitmap->width())) {
            SkDebugf("Expected image width: %i, actual image width %i.\n",
                     referenceBitmap->width(), bitmap->width());
            delete bitmap;
            delete referenceBitmap;
            return false;
        }
        if (success && (bitmap->height() != referenceBitmap->height())) {
            SkDebugf("Expected image height: %i, actual image height %i",
                     referenceBitmap->height(), bitmap->height());
            delete bitmap;
            delete referenceBitmap;
            return false;
        }

        for (int y = 0; success && y < bitmap->height(); y++) {
            for (int x = 0; success && x < bitmap->width(); x++) {
                int diff = MaxByteDiff(*referenceBitmap->getAddr32(x, y),
                                       *bitmap->getAddr32(x, y));
                SkASSERT(diff >= 0 && diff <= 255);
                diffs[diff]++;

                if (diff > FLAGS_maxComponentDiff) {
                    SkDebugf("Expected pixel at (%i %i) exceedds maximum "
                                 "component diff of %i: 0x%x, actual 0x%x\n",
                             x, y, FLAGS_maxComponentDiff,
                             *referenceBitmap->getAddr32(x, y),
                             *bitmap->getAddr32(x, y));
                    delete bitmap;
                    delete referenceBitmap;
                    return false;
                }
            }
        }
        delete referenceBitmap;

        for (int i = 1; i <= 255; ++i) {
            if(diffs[i] > 0) {
                SkDebugf("Number of pixels with max diff of %i is %i\n", i, diffs[i]);
            }
        }
    }

//.........这里部分代码省略.........