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-rw-r--r--drivers/tty/vt/vt.c89
1 files changed, 80 insertions, 9 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 3ad0b61e35b4..5e0f6ff2e2f5 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -735,7 +735,7 @@ static void visual_init(struct vc_data *vc, int num, int init)
vc->vc_num = num;
vc->vc_display_fg = &master_display_fg;
vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
- vc->vc_uni_pagedir = 0;
+ vc->vc_uni_pagedir = NULL;
vc->vc_hi_font_mask = 0;
vc->vc_complement_mask = 0;
vc->vc_can_do_color = 0;
@@ -1231,6 +1231,52 @@ static void default_attr(struct vc_data *vc)
vc->vc_color = vc->vc_def_color;
}
+struct rgb { u8 r; u8 g; u8 b; };
+
+struct rgb rgb_from_256(int i)
+{
+ struct rgb c;
+ if (i < 8) { /* Standard colours. */
+ c.r = i&1 ? 0xaa : 0x00;
+ c.g = i&2 ? 0xaa : 0x00;
+ c.b = i&4 ? 0xaa : 0x00;
+ } else if (i < 16) {
+ c.r = i&1 ? 0xff : 0x55;
+ c.g = i&2 ? 0xff : 0x55;
+ c.b = i&4 ? 0xff : 0x55;
+ } else if (i < 232) { /* 6x6x6 colour cube. */
+ c.r = (i - 16) / 36 * 85 / 2;
+ c.g = (i - 16) / 6 % 6 * 85 / 2;
+ c.b = (i - 16) % 6 * 85 / 2;
+ } else /* Grayscale ramp. */
+ c.r = c.g = c.b = i * 10 - 2312;
+ return c;
+}
+
+static void rgb_foreground(struct vc_data *vc, struct rgb c)
+{
+ u8 hue, max = c.r;
+ if (c.g > max)
+ max = c.g;
+ if (c.b > max)
+ max = c.b;
+ hue = (c.r > max/2 ? 4 : 0)
+ | (c.g > max/2 ? 2 : 0)
+ | (c.b > max/2 ? 1 : 0);
+ if (hue == 7 && max <= 0x55)
+ hue = 0, vc->vc_intensity = 2;
+ else
+ vc->vc_intensity = (max > 0xaa) + 1;
+ vc->vc_color = (vc->vc_color & 0xf0) | hue;
+}
+
+static void rgb_background(struct vc_data *vc, struct rgb c)
+{
+ /* For backgrounds, err on the dark side. */
+ vc->vc_color = (vc->vc_color & 0x0f)
+ | (c.r&0x80) >> 1 | (c.g&0x80) >> 2 | (c.b&0x80) >> 3;
+}
+
/* console_lock is held */
static void csi_m(struct vc_data *vc)
{
@@ -1302,8 +1348,7 @@ static void csi_m(struct vc_data *vc)
case 27:
vc->vc_reverse = 0;
break;
- case 38:
- case 48: /* ITU T.416
+ case 38: /* ITU T.416
* Higher colour modes.
* They break the usual properties of SGR codes
* and thus need to be detected and ignored by
@@ -1315,15 +1360,41 @@ static void csi_m(struct vc_data *vc)
i++;
if (i > vc->vc_npar)
break;
- if (vc->vc_par[i] == 5) /* 256 colours */
- i++; /* ubiquitous */
- else if (vc->vc_par[i] == 2) /* 24 bit colours */
- i += 3; /* extremely rare */
+ if (vc->vc_par[i] == 5 && /* 256 colours */
+ i < vc->vc_npar) { /* ubiquitous */
+ i++;
+ rgb_foreground(vc,
+ rgb_from_256(vc->vc_par[i]));
+ } else if (vc->vc_par[i] == 2 && /* 24 bit */
+ i <= vc->vc_npar + 3) {/* extremely rare */
+ struct rgb c = {r:vc->vc_par[i+1],
+ g:vc->vc_par[i+2],
+ b:vc->vc_par[i+3]};
+ rgb_foreground(vc, c);
+ i += 3;
+ }
/* Subcommands 3 (CMY) and 4 (CMYK) are so insane
- * that detecting them is not worth the few extra
- * bytes of kernel's size.
+ * there's no point in supporting them.
*/
break;
+ case 48:
+ i++;
+ if (i > vc->vc_npar)
+ break;
+ if (vc->vc_par[i] == 5 && /* 256 colours */
+ i < vc->vc_npar) {
+ i++;
+ rgb_background(vc,
+ rgb_from_256(vc->vc_par[i]));
+ } else if (vc->vc_par[i] == 2 && /* 24 bit */
+ i <= vc->vc_npar + 3) {
+ struct rgb c = {r:vc->vc_par[i+1],
+ g:vc->vc_par[i+2],
+ b:vc->vc_par[i+3]};
+ rgb_background(vc, c);
+ i += 3;
+ }
+ break;
case 39:
vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
break;