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Add true color support.

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Implement true color support define in:
https://en.wikipedia.org/wiki/ANSI_escape_code

The sequence is:
ESC[ … 38;2;;; … m Select RGB foreground color
ESC[ … 48;2;;; … m Select RGB background color
This commit is contained in:
Kang.Jianbin
2017-10-27 02:47:24 +08:00
committed by John Hood
parent 70d1ca444f
commit 6cfa4aef59
3 changed files with 52 additions and 5 deletions
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src/terminal/terminalframebuffer.cc
+20 -2
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@@ -505,6 +505,8 @@ void Renditions::set_foreground_color( int num )
{
if ( (0 <= num) && (num <= 255) ) {
foreground_color = 30 + num;
} else if ( is_true_color( num ) ) {
foreground_color = num;
}
}
@@ -512,6 +514,8 @@ void Renditions::set_background_color( int num )
{
if ( (0 <= num) && (num <= 255) ) {
background_color = 40 + num;
} else if ( is_true_color( num ) ) {
background_color = num;
}
}
@@ -544,13 +548,27 @@ std::string Renditions::sgr( void ) const
ret.append( "m" );
if ( foreground_color > 37 ) { /* use 256-color set */
if ( is_true_color( foreground_color ) ) {
char col[64];
snprintf( col, 64, "\033[38;2;%d;%d;%dm",
(foreground_color >> 16) & 0xff,
(foreground_color >> 8) & 0xff,
foreground_color & 0xff);
ret.append( col );
} else if ( foreground_color > 37 ) { /* use 256-color set */
char col[ 64 ];
snprintf( col, 64, "\033[38;5;%dm", foreground_color - 30 );
ret.append( col );
}
if ( background_color > 47 ) { /* use 256-color set */
if ( is_true_color( background_color ) ) {
char col[64];
snprintf( col, 64, "\033[48;2;%d;%d;%dm",
(background_color >> 16) & 0xff,
(background_color >> 8) & 0xff,
background_color & 0xff);
ret.append( col );
} else if ( background_color > 47 ) { /* use 256-color set */
char col[ 64 ];
snprintf( col, 64, "\033[48;5;%dm", background_color - 40 );
ret.append( col );