Merge "Add some logging in KawaseBlurFilter"

sk_sp<SkImage> KawaseBlurFilter::generate(GrRecordingContext* context, const uint32_t blurRadius,

                                          const sk_sp<SkImage> input, const SkRect& blurRect)

    const {

    LOG_ALWAYS_FATAL_IF(input == nullptr, "%s: Invalid input image", __func__);

    // Kawase is an approximation of Gaussian, but it behaves differently from it.

    // A radius transformation is required for approximating them, and also to introduce

    // non-integer steps, necessary to smoothly interpolate large radii.

    // And now we'll build our chain of scaled blur stages

    for (auto i = 1; i < numberOfPasses; i++) {

        LOG_ALWAYS_FATAL_IF(tmpBlur == nullptr, "%s: tmpBlur is null for pass %d", __func__, i);

        blurBuilder.child("child") =

                tmpBlur->makeShader(SkTileMode::kClamp, SkTileMode::kClamp, linear);

        blurBuilder.uniform("in_blurOffset") = (float) i * radiusByPasses * kInputScale;