C++ SkString::appendU64方法代码示例

 SkString GmResultDigest::getDigestValue() const {
     // TODO(epoger): The current implementation assumes that the
     // result digest is always of type kJsonKey_Hashtype_Bitmap_64bitMD5
     SkString retval;
     retval.appendU64(fHashDigest);
     return retval;
 }

/**
 * Write the canvas to an image file and/or JSON summary.
 *
 * @param canvas Must be non-null. Canvas to be written to a file.
 * @param writePath If nonempty, write the binary image to a file within this directory.
 * @param mismatchPath If nonempty, write the binary image to a file within this directory,
 *     but only if the image does not match expectations.
 * @param inputFilename If we are writing out a binary image, use this to build its filename.
 * @param jsonSummaryPtr If not null, add image results (checksum) to this summary.
 * @param useChecksumBasedFilenames If true, use checksum-based filenames when writing to disk.
 * @param tileNumberPtr If not null, which tile number this image contains.
 *
 * @return bool True if the operation completed successfully.
 */
static bool write(SkCanvas* canvas, const SkString& writePath, const SkString& mismatchPath,
                  const SkString& inputFilename, ImageResultsAndExpectations *jsonSummaryPtr,
                  bool useChecksumBasedFilenames, const int* tileNumberPtr=NULL) {
    SkASSERT(canvas != NULL);
    if (NULL == canvas) {
        return false;
    }

    SkBitmap bitmap;
    SkISize size = canvas->getDeviceSize();
    setup_bitmap(&bitmap, size.width(), size.height());

    canvas->readPixels(&bitmap, 0, 0);
    force_all_opaque(bitmap);
    BitmapAndDigest bitmapAndDigest(bitmap);

    SkString escapedInputFilename(inputFilename);
    replace_char(&escapedInputFilename, '.', '_');

    // TODO(epoger): what about including the config type within outputFilename?  That way,
    // we could combine results of different config types without conflicting filenames.
    SkString outputFilename;
    const char *outputSubdirPtr = NULL;
    if (useChecksumBasedFilenames) {
        ImageDigest *imageDigestPtr = bitmapAndDigest.getImageDigestPtr();
        outputSubdirPtr = escapedInputFilename.c_str();
        outputFilename.set(imageDigestPtr->getHashType());
        outputFilename.append("_");
        outputFilename.appendU64(imageDigestPtr->getHashValue());
    } else {
        outputFilename.set(escapedInputFilename);
        if (tileNumberPtr) {
            outputFilename.append("-tile");
            outputFilename.appendS32(*tileNumberPtr);
        }
    }
    outputFilename.append(".png");

    if (jsonSummaryPtr) {
        ImageDigest *imageDigestPtr = bitmapAndDigest.getImageDigestPtr();
        SkString outputRelativePath;
        if (outputSubdirPtr) {
            outputRelativePath.set(outputSubdirPtr);
            outputRelativePath.append("/");  // always use "/", even on Windows
            outputRelativePath.append(outputFilename);
        } else {
            outputRelativePath.set(outputFilename);
        }

        jsonSummaryPtr->add(inputFilename.c_str(), outputRelativePath.c_str(),
                            *imageDigestPtr, tileNumberPtr);
        if (!mismatchPath.isEmpty() &&
            !jsonSummaryPtr->getExpectation(inputFilename.c_str(),
                                            tileNumberPtr).matches(*imageDigestPtr)) {
            if (!write_bitmap_to_disk(bitmap, mismatchPath, outputSubdirPtr, outputFilename)) {
                return false;
            }
        }
    }

    if (writePath.isEmpty()) {
        return true;
    } else {
        return write_bitmap_to_disk(bitmap, writePath, outputSubdirPtr, outputFilename);
    }
}