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libpayload: video: Introduce helpers for font access

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This introduces helpers for accessing the included font, instead of
using hardcoded values provided by the font's header itself.

It will allow painlessly adding support for font scaling in a subsequent
change. It should not introduce any functionality change.

Change-Id: I0277984ec01f49dc51bfc8237ef806f13e3547e2
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: https://review.coreboot.org/20708
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Paul Kocialkowski
2017-07-23 15:36:43 +03:00
committed by Martin Roth
parent 5a752f7b8f
commit 1c0b603673
5 changed files with 122 additions and 34 deletions
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20
payloads/libpayload/drivers/video/geodelx.c
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@@ -31,7 +31,7 @@
#include <pci.h>
#include <video_console.h>
#include <arch/msr.h>
#include "font8x16.h"
#include "font.h"
/* This is the video mode that we're going to use for our VGA screen */
@@ -206,10 +206,10 @@ static void geodelx_set_palette(int entry, unsigned int color)
static void geodelx_scroll_up(void)
{
unsigned char *dst = FB;
unsigned char *src = FB + FONT_HEIGHT * vga_mode.hactive;
unsigned char *src = FB + font_height * vga_mode.hactive;
int y;
for(y = 0; y < vga_mode.vactive - FONT_HEIGHT; y++) {
for(y = 0; y < vga_mode.vactive - font_height; y++) {
memcpy(dst, src, vga_mode.hactive);
dst += vga_mode.hactive;
@@ -236,24 +236,22 @@ static void geodelx_clear(void)
static void geodelx_putc(u8 row, u8 col, unsigned int ch)
{
unsigned char *dst;
unsigned char *glyph = font8x16 + ((ch & 0xFF) * FONT_HEIGHT);
unsigned char bg = (ch >> 12) & 0xF;
unsigned char fg = (ch >> 8) & 0xF;
int x, y;
dst = FB + ((row * FONT_HEIGHT) * vga_mode.hactive);
dst += (col * FONT_WIDTH);
dst = FB + ((row * font_height) * vga_mode.hactive);
dst += (col * font_width);
for(y = 0; y < FONT_HEIGHT; y++) {
for(y = 0; y < font_height; y++) {
for(x = FONT_WIDTH - 1; x >= 0; x--)
dst[FONT_WIDTH - x] = (*glyph & (1 << x)) ?
for(x = font_width - 1; x >= 0; x--)
dst[font_width - x] = font_glyph_filled(ch, x, y) ?
fg : bg;
dst += vga_mode.hactive;
glyph++;
}
}
@@ -270,6 +268,8 @@ static int geodelx_init(void)
dcaddr = pci_read_resource(dev, 2);
vgaddr = pci_read_resource(dev, 3);
font_init();
init_video_mode();
/* Set up the palette */