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vt(4): Colors are indexed against a console palette, not a VGA palette

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Rename vt_generate_vga_palette() to vt_generate_cons_palette() and
change it to build a palette where the color index is the same than in
terminal escape codes, not the VGA index. That's what TCHAR_CREATE()
uses and passes to vt(4).

The main differences between both orders are:
    o  Blue and red are swapped (1 <-> 4)
    o  Yellow and cyan are swapped (3 <-> 6)

The problem remained unnoticed, because the RGB bit indexes passed to
vt_generate_vga_palette() were reversed. This inversion was cancelled
by the colors inversions in the generated palette. For instance, red
(0xff0000) and blue (0x0000ff) have bytes in opposite order, but were
swapped in the palette. But after changing the value of blue (see last
paragraph), the modified color was in fact the red one.

This commit includes a fix to creator_vt.c, submitted by Nathan
Whitehorn: fb_cmsize is set to 16. Before this, the generated palette
would be overwritte. This fixes colors on sparc64 with a Creator3D
adapter.

While here, tune the palette to better match console colors and improve
the readability (especially the dark blue).

Submitted by:	nwhitehorn (fix to creator_vt.c)
MFC after:	1 week
This commit is contained in:
Jean-Sébastien Pédron 2014-08-10 17:04:10 +00:00
parent bb0a8f248d
commit 19e2ce2d83
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=269783
7 changed files with 45 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/dev/fb/creator_vt.c
View File

@ -151,8 +151,9 @@ creatorfb_init(struct vt_device *vd)
sc->memh = sparc64_fake_bustag(space, phys, &sc->memt[0]);
/* 32-bit VGA palette */
vt_generate_vga_palette(sc->fb.fb_cmap, COLOR_FORMAT_RGB,
255, 16, 255, 8, 255, 0);
vt_generate_cons_palette(sc->fb.fb_cmap, COLOR_FORMAT_RGB,
255, 0, 255, 8, 255, 16);
sc->fb.fb_cmsize = 16;
vt_fb_init(vd);

33
sys/dev/vt/colors/vt_termcolors.c
View File

@ -39,25 +39,36 @@ static struct {
unsigned char b; /* Blue percentage value. */
} color_def[16] = {
{0, 0, 0}, /* black */
{0, 0, 50}, /* dark blue */
{0, 50, 0}, /* dark green */
{0, 50, 50}, /* dark cyan */
{50, 0, 0}, /* dark red */
{0, 50, 0}, /* dark green */
{77, 63, 0}, /* dark yellow */
{20, 40, 64}, /* dark blue */
{50, 0, 50}, /* dark magenta */
{50, 50, 0}, /* brown */
{0, 50, 50}, /* dark cyan */
{75, 75, 75}, /* light gray */
{50, 50, 50}, /* dark gray */
{0, 0, 100}, /* light blue */
{0, 100, 0}, /* light green */
{0, 100, 100}, /* light cyan */
{18, 20, 21}, /* dark gray */
{100, 0, 0}, /* light red */
{0, 100, 0}, /* light green */
{100, 100, 0}, /* light yellow */
{45, 62, 81}, /* light blue */
{100, 0, 100}, /* light magenta */
{100, 100, 0}, /* yellow */
{0, 100, 100}, /* light cyan */
{100, 100, 100}, /* white */
};
/*
* Between console's palette and VGA's one:
* - blue and red are swapped (1 <-> 4)
* - yellow ad cyan are swapped (3 <-> 6)
*/
static const int cons_to_vga_colors[16] = {
0, 4, 2, 6, 1, 5, 3, 7,
0, 4, 2, 6, 1, 5, 3, 7
};
int
vt_generate_vga_palette(uint32_t *palette, int format, uint32_t rmax, int roffset,
vt_generate_cons_palette(uint32_t *palette, int format, uint32_t rmax, int roffset,
uint32_t gmax, int goffset, uint32_t bmax, int boffset)
{
int i;
@ -66,7 +77,7 @@ vt_generate_vga_palette(uint32_t *palette, int format, uint32_t rmax, int roffse
for (i = 0; i < 16; i++) {
switch (format) {
case COLOR_FORMAT_VGA:
palette[i] = i;
palette[i] = cons_to_vga_colors[i];
break;
case COLOR_FORMAT_RGB:
palette[i] = CF(r, i) | CF(g, i) | CF(b, i);

2
sys/dev/vt/colors/vt_termcolors.h
View File

@ -45,6 +45,6 @@ enum vt_color_format {
};
/* Helper to fill color map used by driver */
int vt_generate_vga_palette(uint32_t *palette, int format, uint32_t rmax,
int vt_generate_cons_palette(uint32_t *palette, int format, uint32_t rmax,
int roffset, uint32_t gmax, int goffset, uint32_t bmax, int boffset);

2
sys/dev/vt/hw/efifb/efifb.c
View File

@ -129,7 +129,7 @@ vt_efifb_init(struct vt_device *vd)
info->fb_stride = efifb->fb_stride * (depth / 8);
vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1,
efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1,
efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1);

14
sys/dev/vt/hw/fb/vt_early_fb.c
View File

@ -90,25 +90,25 @@ vt_efb_initialize(struct fb_info *info)
*/
switch (info->fb_depth) {
case 8:
vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
0x7, 5, 0x7, 2, 0x3, 0);
break;
case 15:
vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
0x1f, 10, 0x1f, 5, 0x1f, 0);
break;
case 16:
vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
0x1f, 11, 0x3f, 5, 0x1f, 0);
break;
case 24:
case 32:
#if BYTE_ORDER == BIG_ENDIAN
vt_generate_vga_palette(info->fb_cmap,
COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0);
#else
vt_generate_vga_palette(info->fb_cmap,
vt_generate_cons_palette(info->fb_cmap,
COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16);
#else
vt_generate_cons_palette(info->fb_cmap,
COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0);
#endif
#ifdef FDT
for (i = 0; i < 16; i++) {

10
sys/dev/vt/hw/fb/vt_fb.c
View File

@ -333,18 +333,18 @@ vt_fb_init_cmap(uint32_t *cmap, int depth)
switch (depth) {
case 8:
return (vt_generate_vga_palette(cmap, COLOR_FORMAT_RGB,
return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
0x7, 5, 0x7, 2, 0x3, 0));
case 15:
return (vt_generate_vga_palette(cmap, COLOR_FORMAT_RGB,
return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
0x1f, 10, 0x1f, 5, 0x1f, 0));
case 16:
return (vt_generate_vga_palette(cmap, COLOR_FORMAT_RGB,
return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
0x1f, 11, 0x3f, 5, 0x1f, 0));
case 24:
case 32: /* Ignore alpha. */
return (vt_generate_vga_palette(cmap, COLOR_FORMAT_RGB,
0xff, 0, 0xff, 8, 0xff, 16));
return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
0xff, 16, 0xff, 8, 0xff, 0));
default:
return (1);
}

12
sys/dev/vt/hw/ofwfb/ofwfb.c
View File

@ -205,8 +205,8 @@ ofwfb_initialize(struct vt_device *vd)
switch (sc->fb.fb_bpp) {
case 8:
vt_generate_vga_palette(sc->fb.fb_cmap, COLOR_FORMAT_RGB, 255,
0, 255, 8, 255, 16);
vt_generate_cons_palette(sc->fb.fb_cmap, COLOR_FORMAT_RGB, 255,
16, 255, 8, 255, 0);
for (i = 0; i < 16; i++) {
OF_call_method("color!", sc->sc_handle, 4, 1,
@ -228,11 +228,11 @@ ofwfb_initialize(struct vt_device *vd)
oldpix = bus_space_read_4(sc->sc_memt, sc->fb.fb_vbase, 0);
bus_space_write_4(sc->sc_memt, sc->fb.fb_vbase, 0, 0xff000000);
if (*(uint8_t *)(sc->fb.fb_vbase) == 0xff)
vt_generate_vga_palette(sc->fb.fb_cmap,
COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0);
else
vt_generate_vga_palette(sc->fb.fb_cmap,
vt_generate_cons_palette(sc->fb.fb_cmap,
COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16);
else
vt_generate_cons_palette(sc->fb.fb_cmap,
COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0);
bus_space_write_4(sc->sc_memt, sc->fb.fb_vbase, 0, oldpix);
break;