56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
#ifndef _INTERNALS_TALES_H
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#define _INTERNALS_TALES_H 1
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#include <tales.h>
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#include <stdint.h>
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#define OPERATE_ARGS uint32_t *operators, int height, int x, int y
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extern struct Font *font;
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extern enum Color color;
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/*
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tales_init()
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Configures tales with the default font (which is part of gint).
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*/
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void tales_init(void) __attribute__((constructor));
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/*
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getCharacterIndex()
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Returns the index of a character in a font data area depending on the
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font format and the size of the characters. Returns the index in the
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data area, as long array, or -1 when the character does not belong to
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the font format set.
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*/
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int getCharacterIndex(int c);
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/*
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operate()
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Operates on the vram using the given operators. The x-coordinate should
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be a multiple of 32. There should be `height` operators.
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*/
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void operate_mono(OPERATE_ARGS);
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void operate_gray(OPERATE_ARGS);
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/*
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update()
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Updates the operators using the given glyph. The operation will not be
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complete if there are not enough bits available in the operator data.
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In this case the offset will become negative, which means that the
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calling procedure has to call operate() and re-call update().
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`available` represents the number of free bits in the operators (lower
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bits).
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Returns the number of bits available after the operation. If it's
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negative, call operate() and update() again.
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*/
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int update(uint32_t *operators, int height, int available, uint32_t *glyph);
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/*
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render()
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Renders text without any formatting analysis, using the given operation
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function.
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*/
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void render(int x, int y, const char *str, void (*op)(OPERATE_ARGS));
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#endif // _INTERNALS_TALES_H
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