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define cell struct

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nick black 2019-11-17 22:02:43 -05:00
parent ce42950314
commit 17bc714c4d
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2 changed files with 33 additions and 2 deletions
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5
CMakeLists.txt
View File

@ -35,6 +35,11 @@ target_compile_options(notcurses
PRIVATE
-Wall -Wextra -W
)
target_compile_definitions(notcurses
PRIVATE
_DEFAULT_SOURCE _XOPEN_SOURCE=600
)
file(GLOB BINSRCS CONFIGURE_DEPENDS src/bin/*.c)
add_executable(notcurses-demo ${BINSRCS})

30
src/lib/notcurses.c
View File

@ -1,4 +1,4 @@
#include <curses.h> // needed for some definitions, see terminfo(3ncurses)
#include <ncurses.h> // needed for some definitions, see terminfo(3ncurses)
#include <term.h>
#include <errno.h>
#include <stdio.h>
@ -27,6 +27,31 @@ const char* notcurses_version(void){
return NOTCURSES_VERSION;
}
// A cell represents a single character cell in the display. At any cell, we
// can have a short array of wchar_t (L'\0'-terminated; we need support an
// array due to the possibility of combining characters), a foreground color,
// a background color, and an attribute set. The rules on the wchar_t array are
// the same as those for an ncurses 6.1 cchar_t:
//
// * At most one spacing character, which must be the first if present
// * Up to CCHARW_MAX-1 nonspacing characters follow. Extra spacing characters
// are ignored. A nonspacing character is one for which wcwidth() returns
// zero, and is not the wide NUL (L'\0').
// * A single control character can be present, with no other characters.
// * If there are fewer than CCHARW_MAX wide characters, they must be
// terminated with a wide NUL (L'\0').
//
// Multi-column characters can only have a single attribute/color.
// https://pubs.opengroup.org/onlinepubs/007908799/xcurses/intov.html
//
// Each cell occupies 32 bytes (256 bits). The surface is thus ~4MB for a
// (pretty large) 500x200 terminal.
typedef struct cell {
wchar_t cchar[CCHARW_MAX]; // 5 * 4b == 20b
uint64_t attrs; // 16 MSB of attr bits, 24 of fg, 24 of bg
uint32_t reserved; // 0 for now
} cell;
int notcurses_term_dimensions(notcurses* n, int* rows, int* cols){
struct winsize ws;
int i = ioctl(n->ttyfd, TIOCGWINSZ, &ws);
@ -96,7 +121,8 @@ notcurses* notcurses_init(void){
fprintf(stderr, "Warning: advertised RGB flag but only %d colors\n",
ret->colors);
}else{
printf("Colors: %d\n", ret->colors);
printf("Colors: %d (%s)\n", ret->colors,
ret->RGBflag ? "direct" : "palette");
}
int fails = 0;
fails |= term_get_seq(&ret->smcup, "smcup");