99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
#pragma once
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#include <stdint.h>
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#include <sys/types.h>
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/**
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* Arrow types.
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*/
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typedef enum {
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BMOL_ARR_NONE = 0,
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BMOL_ARR_RIGHT,
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BMOL_ARR_LEFT,
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BMOL_ARR_DOWN,
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BMOL_ARR_UP
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} bmol_arr_type;
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/**
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* Defines arrow.
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*/
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typedef struct {
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uint8_t type:3; ///< Arrow type.
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uint8_t inner:1; ///< Associated path is inner path.
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uint8_t seen:1; ///< Has been seen.
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uint8_t visited:1; ///< Has been visited.
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} bmol_arrow;
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/**
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* Defines path segment.
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*/
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typedef struct {
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uint8_t type; ///< Arrow type.
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int dx; ///< Path segment width.
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int dy; ///< Path segment height.
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} bmol_path_seg;
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/**
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* Defines outliner object.
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*/
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typedef struct {
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int width; ///< Bitmap width.
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int height; ///< Bitmap height.
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uint8_t const* data; ///< Bitmap data.
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bmol_path_seg* segments; ///< Path segment buffer.
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int segments_size; ///< Path segment buffer length.
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int segments_cap; ///< Path segment buffer capacity.
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bmol_arrow arrow_grid[]; ///< Grid arrows.
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} bmol_outliner;
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/**
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* Allocate outliner object.
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*
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* @param width The bitmap width.
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* @param height The bitmap height.
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* @param data The bitmap data.
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* @return Outliner object on success.
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*/
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extern bmol_outliner* bmol_alloc(int width, int height, uint8_t const* data);
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/**
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* Free outliner object.
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*
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* @param outliner The outline object.
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*/
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extern void bmol_free(bmol_outliner* outliner);
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/**
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* Find paths in bitmap data.
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*
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* @param outliner The outliner object.
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* @param out_size The number of path fragments.
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* @return The path fragments.
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*/
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extern bmol_path_seg const* bmol_find_paths(bmol_outliner* outliner, int* out_size);
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/**
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* Calculate the SVG path length.
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*
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* @return The length of the SVG path string.
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*/
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extern size_t bmol_svg_path_len(bmol_outliner* outliner);
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/**
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* Create SVG path from segments.
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*
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* @param outliner The outline object.
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* @param buffer The buffer to write the SVG path into.
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* @param buf_size The buffer capacity.
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* @return The length of the generated SVG path.
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*/
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extern size_t bmol_svg_path(bmol_outliner* outliner, char buffer[], size_t buf_size);
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/**
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* Set bitmap data. Must have the same dimensions as the current one.
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*
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* @param outliner The outline robject.
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* @param data The new bitmap data.
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*/
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extern void bmol_set_bitmap(bmol_outliner* outliner, uint8_t const* data);
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