61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
//---
|
|
// display:common - Internal definitions for common display functions
|
|
//---
|
|
|
|
#ifndef DISPLAY_COMMON
|
|
#define DISPLAY_COMMON
|
|
|
|
#include <gint/display.h>
|
|
|
|
/* dhline() - optimized drawing of a horizontal line
|
|
@x1 @x2 @y Coordinates of endpoints of line (both included)
|
|
@color Any color suitable for dline() */
|
|
void dhline(int x1, int x2, int y, color_t color);
|
|
|
|
/* dvline() - optimized drawing of a vertical line
|
|
@y1 @y2 @x Coordinates of endpoints of line (both included)
|
|
@color Any color suitable for dline() */
|
|
void dvline(int y1, int y2, int x, color_t color);
|
|
|
|
//---
|
|
// Font rendering (topti)
|
|
//---
|
|
|
|
/* Current font */
|
|
extern font_t const * topti_font;
|
|
/* Default font */
|
|
extern font_t const * gint_default_font;
|
|
|
|
/* enum topti_charset: Available character set decoders
|
|
Each charset is associated with a reduced character table. */
|
|
enum topti_charset
|
|
{
|
|
charset_numeric = 0, /* 10 elements: 0..9 */
|
|
charset_upper = 1, /* 26 elements: A..Z */
|
|
charset_alpha = 2, /* 52 elements: A..Z, a..z */
|
|
charset_alnum = 3, /* 62 elements: A..Z, a..z, 0..9 */
|
|
charset_print = 4, /* 95 elements: 0x20..0x7e */
|
|
charset_ascii = 5, /* 128 elements: 0x00..0x7f */
|
|
};
|
|
|
|
/* charset_size(): Number of elements in each character set
|
|
@set Character set ID
|
|
Returns the expected number of glyphs, -1 if charset ID is invalid. */
|
|
int charset_size(enum topti_charset set);
|
|
|
|
/* charset_decode(): Translate ASCII into reduced character sets
|
|
Returns the position of [c] in the character table of the given charset, or
|
|
-1 if [c] is not part of that set.
|
|
@set Any character set
|
|
@c Character to decode */
|
|
int charset_decode(enum topti_charset set, uint c);
|
|
|
|
/* topti_offset(): Use a font index to find the location of a glyph
|
|
@f Font object
|
|
@glyph Glyph number obtained by charset_decode(), must be nonnegative.
|
|
Returns the offset the this glyph's data in the font's data array. When
|
|
using a proportional font, the size array is not heeded for. */
|
|
int topti_offset(font_t const *f, uint glyph);
|
|
|
|
#endif /* DISPLAY_COMMON */
|