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Support ESC[38;2;R;G;Bm for 24-bit true colour.

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This is a heavily rewritten version of a patch originally by Lorenz
Diener; it was tidied up somewhat by Christian Brabandt, and then
tidied up more by me. The basic idea is to add to the termchar
structure a pair of small structs encoding 24-bit RGB values, each
with a flag indicating whether it's turned on; if it is, it overrides
any other specification of fg or bg colour for that character cell.

I've added a test line to colours.txt containing a few example colours
from /usr/share/X11/rgb.txt. In fact it makes quite a good demo to run
the whole of rgb.txt through this treatment, with a command such as

  perl -pe 's!^\s*(\d+)\s+(\d+)\s+(\d+).*$!\e[38;2;$1;$2;$3m$&\e[m!' rgb.txt
This commit is contained in:
Simon Tatham
2017-09-30 17:32:32 +01:00
parent 581dd7071e
commit a4cbd3dfdb
8 changed files with 204 additions and 34 deletions
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28
putty.h
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@ -592,12 +592,36 @@ void prompt_ensure_result_size(prompt_t *pr, int len);
/* Burn the evidence. (Assumes _all_ strings want free()ing.) */
void free_prompts(prompts_t *p);
/*
* Data type definitions for true-colour terminal display.
* 'optionalrgb' describes a single RGB colour, which overrides the
* other colour settings if 'enabled' is nonzero, and is ignored
* otherwise. 'truecolour' contains a pair of those for foreground and
* background.
*/
typedef struct optionalrgb {
unsigned char enabled;
unsigned char r, g, b;
} optionalrgb;
extern const optionalrgb optionalrgb_none;
typedef struct truecolour {
optionalrgb fg, bg;
} truecolour;
#define optionalrgb_equal(r1,r2) ( \
(r1).enabled==(r2).enabled && \
(r1).r==(r2).r && (r1).g==(r2).g && (r1).b==(r2).b)
#define truecolour_equal(c1,c2) ( \
optionalrgb_equal((c1).fg, (c2).fg) && \
optionalrgb_equal((c1).bg, (c2).bg))
/*
* Exports from the front end.
*/
void request_resize(void *frontend, int, int);
void do_text(Context, int, int, wchar_t *, int, unsigned long, int);
void do_cursor(Context, int, int, wchar_t *, int, unsigned long, int);
void do_text(Context, int, int, wchar_t *, int, unsigned long, int,
truecolour);
void do_cursor(Context, int, int, wchar_t *, int, unsigned long, int,
truecolour);
int char_width(Context ctx, int uc);
#ifdef OPTIMISE_SCROLL
void do_scroll(Context, int, int, int);