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merged.h File Reference

Merged colours. More...

#include "config.h"
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const struct AttrColormerged_color_overlay (const struct AttrColor *base, const struct AttrColor *over)
 Combine two colours.
void merged_colors_cleanup (void)
 Free the list of Merged colours.
void merged_colors_init (void)
 Initialise the Merged colours.

Detailed Description

Merged colours.

  • Richard Russon

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see

Definition in file merged.h.

Function Documentation

◆ merged_color_overlay()

const struct AttrColor * merged_color_overlay ( const struct AttrColor base,
const struct AttrColor over 

Combine two colours.

baseBase colour
overOverlay colour
Return values
ptrMerged colour

If either the foreground or background of the overlay is 'default', then the base colour will show through. The attributes of both base and overlay will be OR'd together.

Definition at line 107 of file merged.c.

110 if (!attr_color_is_set(over))
111 return base;
112 if (!attr_color_is_set(base))
113 return over;
115 struct CursesColor *cc_base = base->curses_color;
116 struct CursesColor *cc_over = over->curses_color;
121 if (cc_over)
122 {
123 fg = cc_over->fg;
124 bg = cc_over->bg;
125 }
127 if (cc_base)
128 {
129 if (fg == COLOR_DEFAULT)
130 fg = cc_base->fg;
131 if (bg == COLOR_DEFAULT)
132 bg = cc_base->bg;
133 }
135 int attrs = base->attrs | over->attrs;
137 struct AttrColor *ac = merged_colors_find(fg, bg, attrs);
138 if (ac)
139 return ac;
141 ac = attr_color_new();
143 ac->attrs = attrs;
144 ac->fg = (base->fg.color == COLOR_DEFAULT) ? over->fg : base->fg;
145 ac->bg = (base->bg.color == COLOR_DEFAULT) ? over->bg : base->bg;
146 TAILQ_INSERT_TAIL(&MergedColors, ac, entries);
148 return ac;
struct AttrColor * attr_color_new(void)
Create a new AttrColor.
Definition: attr.c:90
bool attr_color_is_set(const struct AttrColor *ac)
Is the object coloured?
Definition: attr.c:179
Definition: color.h:100
int32_t color_t
Type for 24-bit colour value.
Definition: curses2.h:31
struct CursesColor * curses_color_new(color_t fg, color_t bg)
Create a new CursesColor.
Definition: curses.c:151
struct AttrColorList MergedColors
Array of user colours.
Definition: merged.c:39
static struct AttrColor * merged_colors_find(color_t fg, color_t bg, int attrs)
Find a Merged colour.
Definition: merged.c:72
#define TAILQ_INSERT_TAIL(head, elm, field)
Definition: queue.h:809
A curses colour and its attributes.
Definition: attr.h:66
struct ColorElement bg
Background colour.
Definition: attr.h:68
struct ColorElement fg
Foreground colour.
Definition: attr.h:67
int attrs
Text attributes, e.g. A_BOLD.
Definition: attr.h:69
struct CursesColor * curses_color
Underlying Curses colour.
Definition: attr.h:70
color_t color
Definition: attr.h:57
Colour in the ncurses palette.
Definition: curses2.h:41
color_t fg
Foreground colour.
Definition: curses2.h:42
color_t bg
Background colour.
Definition: curses2.h:43
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◆ merged_colors_cleanup()

void merged_colors_cleanup ( void  )

Free the list of Merged colours.

Definition at line 52 of file merged.c.

54 struct AttrColor *ac = NULL;
55 struct AttrColor *tmp = NULL;
57 TAILQ_FOREACH_SAFE(ac, &MergedColors, entries, tmp)
58 {
59 TAILQ_REMOVE(&MergedColors, ac, entries);
61 FREE(&ac);
62 }
void curses_color_free(struct CursesColor **ptr)
Free a CursesColor.
Definition: curses.c:120
#define FREE(x)
Definition: memory.h:45
#define TAILQ_FOREACH_SAFE(var, head, field, tvar)
Definition: queue.h:735
#define TAILQ_REMOVE(head, elm, field)
Definition: queue.h:841
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◆ merged_colors_init()

void merged_colors_init ( void  )

Initialise the Merged colours.

Definition at line 44 of file merged.c.

#define TAILQ_INIT(head)
Definition: queue.h:765
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