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| author | Michael Brown | 2015-10-14 21:42:42 +0200 |
|---|---|---|
| committer | Michael Brown | 2015-10-14 23:16:40 +0200 |
| commit | bc69777a4044c09cfed65d84f11988448b2db277 (patch) | |
| tree | da8e8429415473fe7e817e2af93deb9f5b05d8c9 /src/arch/i386 | |
| parent | [efi] Import EFI_HII_FONT_PROTOCOL definitions (diff) | |
| download | ipxe-bc69777a4044c09cfed65d84f11988448b2db277.tar.gz ipxe-bc69777a4044c09cfed65d84f11988448b2db277.tar.xz ipxe-bc69777a4044c09cfed65d84f11988448b2db277.zip | |
[fbcon] Allow character height to be selected at runtime
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/arch/i386')
| -rw-r--r-- | src/arch/i386/interface/pcbios/vesafb.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/src/arch/i386/interface/pcbios/vesafb.c b/src/arch/i386/interface/pcbios/vesafb.c index 9cf2bf29..4742f956 100644 --- a/src/arch/i386/interface/pcbios/vesafb.c +++ b/src/arch/i386/interface/pcbios/vesafb.c @@ -66,6 +66,9 @@ struct console_driver bios_console __attribute__ (( weak )); #define CONSOLE_VESAFB ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_LOG ) #endif +/** Character height */ +#define VESAFB_CHAR_HEIGHT 16 + /** Font corresponding to selected character width and height */ #define VESAFB_FONT VBE_FONT_8x16 @@ -86,6 +89,8 @@ struct vesafb { struct fbcon_colour_map map; /** Font definition */ struct fbcon_font font; + /** Character glyphs */ + struct segoff glyphs; /** Saved VGA mode */ uint8_t saved_mode; }; @@ -119,11 +124,23 @@ static int vesafb_rc ( unsigned int status ) { } /** + * Get character glyph + * + * @v character Character + * @v glyph Character glyph to fill in + */ +static void vesafb_glyph ( unsigned int character, uint8_t *glyph ) { + size_t offset = ( character * VESAFB_CHAR_HEIGHT ); + + copy_from_real ( glyph, vesafb.glyphs.segment, + ( vesafb.glyphs.offset + offset ), VESAFB_CHAR_HEIGHT); +} + +/** * Get font definition * */ static void vesafb_font ( void ) { - struct segoff font; /* Get font information * @@ -144,13 +161,14 @@ static void vesafb_font ( void ) { "movw %%es, %%cx\n\t" "movw %%bp, %%dx\n\t" "popw %%bp\n\t" /* gcc bug */ ) - : "=c" ( font.segment ), - "=d" ( font.offset ) + : "=c" ( vesafb.glyphs.segment ), + "=d" ( vesafb.glyphs.offset ) : "a" ( VBE_GET_FONT ), "b" ( VESAFB_FONT ) ); DBGC ( &vbe_buf, "VESAFB has font %04x at %04x:%04x\n", - VESAFB_FONT, font.segment, font.offset ); - vesafb.font.start = real_to_user ( font.segment, font.offset ); + VESAFB_FONT, vesafb.glyphs.segment, vesafb.glyphs.offset ); + vesafb.font.height = VESAFB_CHAR_HEIGHT; + vesafb.font.glyph = vesafb_glyph; } /** |