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#ifndef RENDER_MULTI_H

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#define RENDER_MULTI_H

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#include "remote_pool.h"

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/*

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 * Execute a given render_t operate across multiple remote render nodes, and aggregate the results into a single PNG stream locally

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 */

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struct render_multi;

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// how many nodes can be involved in a render operation at most

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#define RENDER_MULTI_NODES_MAX 2

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/*

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 * Execute the given render operation on multiple nodes from the given remote pool, streaming back the result in PNG format via the given callbacks

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 *

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 * The behaviour of the callbacks is mostly the same as for render_remote.h

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 */

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struct render_multi *render_multi (

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        render_t *render_ctx,               // what to render

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        struct remote_pool *render_pool,    // what render pool to use

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        void (*cb_sent)(void *arg),

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        void (*cb_data)(struct evbuffer *buf, void *arg),

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        void (*cb_done)(void *arg),

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        void (*cb_fail)(void *arg),

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        void *cb_arg

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);

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#endif /* RENDER_MULTI_H */