48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
#ifndef _SPRITE_H
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#define _SPRITE_H
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#include "pico/types.h"
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#include "affine_transform.h"
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// 3 words -- any bigger and we will need to pack the flags!
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typedef struct sprite {
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int16_t x;
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int16_t y;
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const void *img;
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uint8_t log_size; // always square
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bool has_opacity_metadata;
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bool hflip;
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bool vflip;
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} sprite_t;
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// ----------------------------------------------------------------------------
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// Functions from sprite.S
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// Constant-colour span
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void sprite_fill8(uint8_t *dst, uint8_t colour, uint len);
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void sprite_fill16(uint16_t *dst, uint16_t colour, uint len);
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// Block image transfers
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void sprite_blit8(uint8_t *dst, const uint8_t *src, uint len);
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void sprite_blit8_alpha(uint8_t *dst, const uint8_t *src, uint len);
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void sprite_blit16(uint16_t *dst, const uint16_t *src, uint len);
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void sprite_blit16_alpha(uint16_t *dst, const uint16_t *src, uint len);
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// These are just inner loops, and require INTERP0 to be configured before calling:
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void sprite_ablit8_loop(uint8_t *dst, uint len);
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void sprite_ablit8_alpha_loop(uint8_t *dst, uint len);
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void sprite_ablit16_loop(uint16_t *dst, uint len);
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void sprite_ablit16_alpha_loop(uint16_t *dst, uint len);
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// ----------------------------------------------------------------------------
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// Functions from sprite.c
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// Render the intersection of a sprite with the current scanline:
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void sprite_sprite8(uint8_t *scanbuf, const sprite_t *sp, uint raster_y, uint raster_w);
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void sprite_sprite16(uint16_t *scanbuf, const sprite_t *sp, uint raster_y, uint raster_w);
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// As above, but apply an affine transform on sprite texture lookups (SLOW, even with interpolator)
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void sprite_asprite8(uint8_t *scanbuf, const sprite_t *sp, const affine_transform_t atrans, uint raster_y, uint raster_w);
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void sprite_asprite16(uint16_t *scanbuf, const sprite_t *sp, const affine_transform_t atrans, uint raster_y, uint raster_w);
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#endif
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