In HdrViewfinder using macros and proper configuration

[pfk-beta]

In documentation about RenderScript there is information about creating kernels with using macro RS_KERNEL in example code there is ugly __attribute__((kernel)).

Second item, in documetation about RenderScript there is information about configuring build.gradle:

        renderscriptTargetApi 18
        renderscriptSupportModeEnabled true

Why there is no such entry in example config?