implement inverse

3 files changed, 30 insertions, 9 deletions

diff --git a/src/display.c b/src/display.c
index 2f755a8..4686d26 100644
--- a/src/display.c
+++ b/src/display.c
@@ -185,6 +185,18 @@ static void runes_display_draw_cell(RunesTerm *t, int row, int col)
         break;
     }
 
+    if (cell->attrs.inverse) {
+        if (cell->attrs.fgcolor.id == cell->attrs.bgcolor.id) {
+            fg = t->bgdefault;
+            bg = t->fgdefault;
+        }
+        else {
+            cairo_pattern_t *tmp = fg;
+            fg = bg;
+            bg = tmp;
+        }
+    }
+
     if (bg) {
         runes_display_paint_rectangle(t, t->cr, bg, row, col, 1, 1);
     }
diff --git a/src/screen.c b/src/screen.c
index 00a4476..0f62667 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -314,8 +314,9 @@ void runes_screen_set_underline(RunesTerm *t)
 
 void runes_screen_set_inverse(RunesTerm *t)
 {
-    UNUSED(t);
-    fprintf(stderr, "set_inverse nyi\n");
+    RunesScreen *scr = &t->scr;
+
+    scr->attrs.inverse = 1;
 }
 
 void runes_screen_reset_bold(RunesTerm *t)
@@ -341,8 +342,9 @@ void runes_screen_reset_underline(RunesTerm *t)
 
 void runes_screen_reset_inverse(RunesTerm *t)
 {
-    UNUSED(t);
-    fprintf(stderr, "reset_inverse nyi\n");
+    RunesScreen *scr = &t->scr;
+
+    scr->attrs.inverse = 0;
 }
 
 void runes_screen_use_alternate_buffer(RunesTerm *t)
diff --git a/src/screen.h b/src/screen.h
index 1c0eb9d..4fd9e83 100644
--- a/src/screen.h
+++ b/src/screen.h
@@ -1,6 +1,8 @@
 #ifndef _RUNES_SCREEN_H
 #define _RUNES_SCREEN_H
 
+#include <stdint.h>
+
 enum RunesColorType {
     RUNES_COLOR_DEFAULT,
     RUNES_COLOR_IDX,
@@ -15,13 +17,18 @@ struct runes_loc {
 struct runes_color {
     union {
         struct {
-            unsigned char r;
-            unsigned char g;
-            unsigned char b;
+            union {
+                struct {
+                    unsigned char r;
+                    unsigned char g;
+                    unsigned char b;
+                };
+                unsigned char idx;
+            };
+            unsigned char type;
         };
-        unsigned char idx;
+        uint32_t id;
     };
-    unsigned char type;
 };
 
 struct runes_cell_attrs {