100 lines
3.8 KiB
C
100 lines
3.8 KiB
C
#ifndef __MICROPY_INCLUDED_MICROBIT_IMAGE_H__
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#define __MICROPY_INCLUDED_MICROBIT_IMAGE_H__
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#include "py/runtime.h"
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#define MAX_BRIGHTNESS 9
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/** Monochrome images are immutable, which means that
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* we only need one bit per pixel which saves quite a lot
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* of memory */
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/* we reserve a couple of bits, so we won't need to modify the
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* layout if we need to add more functionality or subtypes. */
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#define TYPE_AND_FLAGS \
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mp_obj_base_t base; \
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uint8_t five:1; \
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uint8_t reserved1:1; \
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uint8_t reserved2:1
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typedef struct _image_base_t {
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TYPE_AND_FLAGS;
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} image_base_t;
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typedef struct _monochrome_5by5_t {
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TYPE_AND_FLAGS;
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uint8_t pixel44: 1;
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uint8_t bits24[3];
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} monochrome_5by5_t;
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/* This is an internal method it is up to the caller to validate the inputs */
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uint8_t monochromeGetPixelValue(monochrome_5by5_t * p_mono, mp_int_t x, mp_int_t y);
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typedef struct _greyscale_t {
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TYPE_AND_FLAGS;
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uint8_t height;
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uint8_t width;
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uint8_t byte_data[]; /* Static initializer for this will have to be C, not C++ */
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} greyscale_t;
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#if 1
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void clear(greyscale_t * p_greyscale);
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/* Thiese are internal methods and it is up to the caller to validate the inputs */
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uint8_t greyscaleGetPixelValue(greyscale_t * p_greyscale, mp_int_t x, mp_int_t y);
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void greyscaleSetPixelValue(greyscale_t * p_greyscale, mp_int_t x, mp_int_t y, mp_int_t val);
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void greyscaleFill(greyscale_t * p_greyscale, mp_int_t val);
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#endif
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typedef union _microbit_image_obj_t {
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image_base_t base;
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monochrome_5by5_t monochrome_5by5;
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greyscale_t greyscale;
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} microbit_image_obj_t;
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#if 1
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mp_int_t imageHeight(microbit_image_obj_t * p_image_obj);
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mp_int_t imageWidth(microbit_image_obj_t * p_image_obj);
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greyscale_t * imageCopy(microbit_image_obj_t * p_image_obj);
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greyscale_t * imageInvert(microbit_image_obj_t * p_image_obj);
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/* This is an internal method it is up to the caller to validate the inputs */
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uint8_t imageGetPixelValue(microbit_image_obj_t * p_image_obj, mp_int_t x, mp_int_t y);
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#endif
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/** Return a facade object that presents the string as a sequence of images */
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mp_obj_t microbit_string_facade(mp_obj_t string);
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void microbit_image_set_from_char(greyscale_t *img, char c);
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microbit_image_obj_t *microbit_image_for_char(char c);
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mp_obj_t microbit_image_slice(microbit_image_obj_t *img, mp_int_t start, mp_int_t width, mp_int_t stride);
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/* ref exists so that we can pull a string out of an object and not have it GC'ed while oterating over it */
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mp_obj_t scrolling_string_image_iterable(const char* str, mp_uint_t len, mp_obj_t ref, bool monospace, bool repeat);
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#define SMALL_IMAGE(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p44) \
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{ \
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{ µbit_image_type }, \
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1, 0, 0, (p44), \
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{ \
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(p0)|((p1)<<1)|((p2)<<2)|((p3)<<3)|((p4)<<4)|((p5)<<5)|((p6)<<6)|((p7)<<7), \
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(p8)|((p9)<<1)|((p10)<<2)|((p11)<<3)|((p12)<<4)|((p13)<<5)|((p14)<<6)|((p15)<<7), \
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(p16)|((p17)<<1)|((p18)<<2)|((p19)<<3)|((p20)<<4)|((p21)<<5)|((p22)<<6)|((p23)<<7) \
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} \
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}
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extern const monochrome_5by5_t microbit_blank_image;
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extern const monochrome_5by5_t microbit_const_image_heart_obj;
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extern const mp_obj_type_t microbit_image_type;
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#define BLANK_IMAGE (microbit_image_obj_t *)(µbit_blank_image)
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#define HEART_IMAGE (microbit_image_obj_t *)(µbit_const_image_heart_obj)
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#define HAPPY_IMAGE (microbit_image_obj_t *)(µbit_const_image_happy_obj)
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#if MICROPY_PY_BUILTINS_FLOAT
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microbit_image_obj_t *microbit_image_dim(microbit_image_obj_t *lhs, mp_float_t fval);
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#else
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microbit_image_obj_t *microbit_image_dim(microbit_image_obj_t *lhs, mp_int_t val);
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#endif
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microbit_image_obj_t *microbit_image_sum(microbit_image_obj_t *lhs, microbit_image_obj_t *rhs, bool add);
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#endif // __MICROPY_INCLUDED_MICROBIT_IMAGE_H__
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