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#ifdef RENDER_H

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#error render_internal.h must be included before render.h

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#endif

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#ifndef RENDER_INTERNAL_H

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#define RENDER_INTERNAL_H

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#include "render.h"

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struct render {

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/* render mode */

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    int mode;

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/* image size */

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    u_int32_t img_w;

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    u_int32_t img_h;

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/* mandelbrot region */

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    double      x1;

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    double      y1;

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    double      x2;

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    double      y2;

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/* local rendering */

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    unsigned char **local_rowbuf_addr;

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    render_ctx_row_cb local_row_fn;

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/* local I/O parameters */

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    // if this is non-NULL, the image data is simply fwrite():en to this stream

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    FILE *io_stream;

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    // called to handle the output data

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    render_ctx_write_cb io_write_fn;

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    // called when the output data should be flushed - can be safely ignored if not needed

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    render_ctx_flush_cb io_flush_fn;

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    // the callback argument for all of the above *_fn

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    void *cb_arg;

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};

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#endif /* RENDER_INTERNAL_H */

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