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efi_loader: console support for color attributes

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Shell.efi uses this, and supporting color attributes makes things look
nicer.  Map the EFI fg/bg color attributes to ANSI escape sequences.
Not all colors have a perfect match, but spec just says "Devices
supporting a different number of text colors are required to emulate the
above colors to the best of the device’s capabilities".

Signed-off-by: Rob Clark <robdclark@gmail.com>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Alexander Graf <agraf@suse.de>
[agraf: s/unsigned/unsigned int/]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Rob Clark 2017-10-10 08:23:01 -04:00 committed by Alexander Graf
parent bf19273e81
commit 2d5dc2a52d
2 changed files with 58 additions and 2 deletions
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33
include/efi_api.h
View File

@ -433,6 +433,39 @@ struct simple_text_output_mode {
EFI_GUID(0x387477c2, 0x69c7, 0x11d2, \
0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_BLACK 0x00
#define EFI_BLUE 0x01
#define EFI_GREEN 0x02
#define EFI_CYAN 0x03
#define EFI_RED 0x04
#define EFI_MAGENTA 0x05
#define EFI_BROWN 0x06
#define EFI_LIGHTGRAY 0x07
#define EFI_BRIGHT 0x08
#define EFI_DARKGRAY 0x08
#define EFI_LIGHTBLUE 0x09
#define EFI_LIGHTGREEN 0x0a
#define EFI_LIGHTCYAN 0x0b
#define EFI_LIGHTRED 0x0c
#define EFI_LIGHTMAGENTA 0x0d
#define EFI_YELLOW 0x0e
#define EFI_WHITE 0x0f
#define EFI_BACKGROUND_BLACK 0x00
#define EFI_BACKGROUND_BLUE 0x10
#define EFI_BACKGROUND_GREEN 0x20
#define EFI_BACKGROUND_CYAN 0x30
#define EFI_BACKGROUND_RED 0x40
#define EFI_BACKGROUND_MAGENTA 0x50
#define EFI_BACKGROUND_BROWN 0x60
#define EFI_BACKGROUND_LIGHTGRAY 0x70
/* extract foreground color from EFI attribute */
#define EFI_ATTR_FG(attr) ((attr) & 0x07)
/* treat high bit of FG as bright/bold (similar to edk2) */
#define EFI_ATTR_BOLD(attr) (((attr) >> 3) & 0x01)
/* extract background color from EFI attribute */
#define EFI_ATTR_BG(attr) (((attr) >> 4) & 0x7)
struct efi_simple_text_output_protocol {
void *reset;
efi_status_t (EFIAPI *output_string)(

27
lib/efi_loader/efi_console.c
View File

@ -307,14 +307,37 @@ static efi_status_t EFIAPI efi_cout_set_mode(
return EFI_EXIT(EFI_SUCCESS);
}
static const struct {
unsigned int fg;
unsigned int bg;
} color[] = {
{ 30, 40 }, /* 0: black */
{ 34, 44 }, /* 1: blue */
{ 32, 42 }, /* 2: green */
{ 36, 46 }, /* 3: cyan */
{ 31, 41 }, /* 4: red */
{ 35, 45 }, /* 5: magenta */
{ 33, 43 }, /* 6: brown, map to yellow as edk2 does*/
{ 37, 47 }, /* 7: light grey, map to white */
};
/* See EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetAttribute(). */
static efi_status_t EFIAPI efi_cout_set_attribute(
struct efi_simple_text_output_protocol *this,
unsigned long attribute)
{
unsigned int bold = EFI_ATTR_BOLD(attribute);
unsigned int fg = EFI_ATTR_FG(attribute);
unsigned int bg = EFI_ATTR_BG(attribute);
EFI_ENTRY("%p, %lx", this, attribute);
/* Just ignore attributes (colors) for now */
return EFI_EXIT(EFI_UNSUPPORTED);
if (attribute)
printf(ESC"[%u;%u;%um", bold, color[fg].fg, color[bg].bg);
else
printf(ESC"[0;37;40m");
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_cout_clear_screen(