Merge "Fixes for YuvToJpegEncoder::encode"

YuvToJpegEncoder::YuvToJpegEncoder(int* strides) : fStrides(strides) {

}

struct ErrorMgr {

    struct jpeg_error_mgr pub;

    jmp_buf jmp;

};

void error_exit(j_common_ptr cinfo) {

    ErrorMgr* err = (ErrorMgr*) cinfo->err;

    (*cinfo->err->output_message) (cinfo);

    longjmp(err->jmp, 1);

}

bool YuvToJpegEncoder::encode(SkWStream* stream, void* inYuv, int width,

        int height, int* offsets, int jpegQuality) {

    jpeg_compress_struct    cinfo;

    jpeg_error_mgr          err;

    ErrorMgr                err;

    skjpeg_destination_mgr  sk_wstream(stream);

    cinfo.err = jpeg_std_error(&err);

    err.error_exit = skjpeg_error_exit;

    jmp_buf jmp;

    if (setjmp(jmp)) {

    cinfo.err = jpeg_std_error(&err.pub);

    err.pub.error_exit = error_exit;

    if (setjmp(err.jmp)) {

        jpeg_destroy_compress(&cinfo);

        return false;

    }

    jpeg_create_compress(&cinfo);

    jpeg_finish_compress(&cinfo);

    jpeg_destroy_compress(&cinfo);

    return true;

}