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48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
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//---
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//
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// gint drawing module: tales
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//
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// Text displaying. Does some good optimization, though requires dynamic
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// allocation.
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//
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//---
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#ifndef _TALES_INTERNALS_H
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#define _TALES_INTERNALS_H 1
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#include <tales.h>
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#include <stdint.h>
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extern struct Font *font;
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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(uint32_t *operators, int height, int x, int y);
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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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#endif // _TALES_INTERNALS_H
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