51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
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#ifndef APP_MODULES_PIXBUF_H_
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#define APP_MODULES_PIXBUF_H_
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typedef struct pixbuf {
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const size_t npix;
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const size_t nchan;
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/* Flexible Array Member; true size is npix * pixbuf_channels_for(type) */
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uint8_t values[];
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} pixbuf;
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enum pixbuf_fade {
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PIXBUF_FADE_IN,
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PIXBUF_FADE_OUT
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};
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enum pixbuf_shift {
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PIXBUF_SHIFT_LOGICAL,
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PIXBUF_SHIFT_CIRCULAR
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};
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pixbuf *pixbuf_from_lua_arg(lua_State *, int);
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const size_t pixbuf_size(pixbuf *);
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// Exported for backwards compat with ws2812 module
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int pixbuf_new_lua(lua_State *);
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/*
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* WS2812_EFFECTS does pixbuf manipulation directly in C, which isn't the
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* intended use case, but for backwards compat, we export just what it needs.
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* Move this struct to pixbuf.c and mark these exports static instead once
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* WS2812_EFFECTS is no more.
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*/
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struct pixbuf_shift_params {
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enum pixbuf_shift type;
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// 0 <= offset <= buffer length
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size_t offset;
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// 0 <= window + offset <= buffer length
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size_t window;
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// 0 <= shift <= window_size
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size_t shift;
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bool shiftLeft;
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};
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void pixbuf_shift(pixbuf *, struct pixbuf_shift_params *);
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void pixbuf_prepare_shift(pixbuf *, struct pixbuf_shift_params *,
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int val, enum pixbuf_shift, int start, int end);
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const size_t pixbuf_channels(pixbuf *);
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/* end WS2812_EFFECTS exports */
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#endif
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