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// Initialize the VGA console and possibly show a boot splash image.
//
// Copyright (C) 2009-2010 coresystems GmbH
// Copyright (C) 2010 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "bregs.h" // struct bregs
#include "config.h" // CONFIG_*
#include "farptr.h" // FLATPTR_TO_SEG
#include "malloc.h" // free
#include "output.h" // dprintf
#include "romfile.h" // romfile_loadfile
#include "stacks.h" // call16_int
#include "std/vbe.h" // struct vbe_info
#include "string.h" // memset
#include "util.h" // enable_bootsplash
/****************************************************************
* Helper functions
****************************************************************/
// Call int10 vga handler.
static void
call16_int10(struct bregs *br)
{
br->flags = F_IF;
start_preempt();
call16_int(0x10, br);
finish_preempt();
}
/****************************************************************
* VGA text / graphics console
****************************************************************/
void
enable_vga_console(void)
{
dprintf(1, "Turning on vga text mode console\n");
struct bregs br;
/* Enable VGA text mode */
memset(&br, 0, sizeof(br));
br.ax = 0x0003;
call16_int10(&br);
// Write to screen.
printf("SeaBIOS (version %s)\n", VERSION);
display_uuid();
}
static int
find_videomode(struct vbe_info *vesa_info, struct vbe_mode_info *mode_info
, int width, int height, int bpp_req)
{
dprintf(3, "Finding vesa mode with dimensions %d/%d\n", width, height);
u16 *videomodes = SEGOFF_TO_FLATPTR(vesa_info->video_mode);
for (;; videomodes++) {
u16 videomode = *videomodes;
if (videomode == 0xffff) {
dprintf(1, "Unable to find vesa video mode dimensions %d/%d\n"
, width, height);
return -1;
}
struct bregs br;
memset(&br, 0, sizeof(br));
br.ax = 0x4f01;
br.cx = videomode;
br.di = FLATPTR_TO_OFFSET(mode_info);
br.es = FLATPTR_TO_SEG(mode_info);
call16_int10(&br);
if (br.ax != 0x4f) {
dprintf(1, "get_mode failed.\n");
continue;
}
if (mode_info->xres != width
|| mode_info->yres != height)
continue;
u8 depth = mode_info->bits_per_pixel;
if (bpp_req == 0) {
if ((depth != 16 && depth != 24 && depth != 32)
|| mode_info->green_size == 5)
continue;
} else {
if (depth != bpp_req)
continue;
}
return videomode;
}
}
static int BootsplashActive;
void
enable_bootsplash(void)
{
if (!CONFIG_BOOTSPLASH)
return;
/* splash picture can be bmp or jpeg file */
dprintf(3, "Checking for bootsplash\n");
u8 type = 0; /* 0 means jpg, 1 means bmp, default is 0=jpg */
int filesize;
u8 *filedata = romfile_loadfile("bootsplash.jpg", &filesize);
if (!filedata) {
filedata = romfile_loadfile("bootsplash.bmp", &filesize);
if (!filedata)
return;
type = 1;
}
dprintf(3, "start showing bootsplash\n");
u8 *picture = NULL; /* data buff used to be flushed to the video buf */
struct jpeg_decdata *jpeg = NULL;
struct bmp_decdata *bmp = NULL;
struct vbe_info *vesa_info = malloc_tmplow(sizeof(*vesa_info));
struct vbe_mode_info *mode_info = malloc_tmplow(sizeof(*mode_info));
if (!vesa_info || !mode_info) {
warn_noalloc();
goto done;
}
/* Check whether we have a VESA 2.0 compliant BIOS */
memset(vesa_info, 0, sizeof(struct vbe_info));
vesa_info->signature = VBE2_SIGNATURE;
struct bregs br;
memset(&br, 0, sizeof(br));
br.ax = 0x4f00;
br.di = FLATPTR_TO_OFFSET(vesa_info);
br.es = FLATPTR_TO_SEG(vesa_info);
call16_int10(&br);
if (vesa_info->signature != VESA_SIGNATURE) {
dprintf(1,"No VBE2 found.\n");
goto done;
}
/* Print some debugging information about our card. */
char *vendor = SEGOFF_TO_FLATPTR(vesa_info->oem_vendor_string);
char *product = SEGOFF_TO_FLATPTR(vesa_info->oem_product_string);
dprintf(3, "VESA %d.%d\nVENDOR: %s\nPRODUCT: %s\n",
vesa_info->version>>8, vesa_info->version&0xff,
vendor, product);
int ret, width, height;
int bpp_require = 0;
if (type == 0) {
jpeg = jpeg_alloc();
if (!jpeg) {
warn_noalloc();
goto done;
}
/* Parse jpeg and get image size. */
dprintf(5, "Decoding bootsplash.jpg\n");
ret = jpeg_decode(jpeg, filedata);
if (ret) {
dprintf(1, "jpeg_decode failed with return code %d...\n", ret);
goto done;
}
jpeg_get_size(jpeg, &width, &height);
} else {
bmp = bmp_alloc();
if (!bmp) {
warn_noalloc();
goto done;
}
/* Parse bmp and get image size. */
dprintf(5, "Decoding bootsplash.bmp\n");
ret = bmp_decode(bmp, filedata, filesize);
if (ret) {
dprintf(1, "bmp_decode failed with return code %d...\n", ret);
goto done;
}
bmp_get_size(bmp, &width, &height);
bpp_require = 24;
}
/* jpeg would use 16 or 24 bpp video mode, BMP use 24bpp mode only */
// Try to find a graphics mode with the corresponding dimensions.
int videomode = find_videomode(vesa_info, mode_info, width, height,
bpp_require);
if (videomode < 0) {
dprintf(1, "failed to find a videomode with %dx%d %dbpp (0=any).\n",
width, height, bpp_require);
goto done;
}
void *framebuffer = (void *)mode_info->phys_base;
int depth = mode_info->bits_per_pixel;
dprintf(3, "mode: %04x\n", videomode);
dprintf(3, "framebuffer: %p\n", framebuffer);
dprintf(3, "bytes per scanline: %d\n", mode_info->bytes_per_scanline);
dprintf(3, "bits per pixel: %d\n", depth);
// Allocate space for image and decompress it.
int imagesize = height * mode_info->bytes_per_scanline;
picture = malloc_tmphigh(imagesize);
if (!picture) {
warn_noalloc();
goto done;
}
if (type == 0) {
dprintf(5, "Decompressing bootsplash.jpg\n");
ret = jpeg_show(jpeg, picture, width, height, depth,
mode_info->bytes_per_scanline);
if (ret) {
dprintf(1, "jpeg_show failed with return code %d...\n", ret);
goto done;
}
} else {
dprintf(5, "Decompressing bootsplash.bmp\n");
ret = bmp_show(bmp, picture, width, height, depth,
mode_info->bytes_per_scanline);
if (ret) {
dprintf(1, "bmp_show failed with return code %d...\n", ret);
goto done;
}
}
/* Switch to graphics mode */
dprintf(5, "Switching to graphics mode\n");
memset(&br, 0, sizeof(br));
br.ax = 0x4f02;
br.bx = videomode | VBE_MODE_LINEAR_FRAME_BUFFER;
call16_int10(&br);
if (br.ax != 0x4f) {
dprintf(1, "set_mode failed.\n");
goto done;
}
/* Show the picture */
dprintf(5, "Showing bootsplash picture\n");
iomemcpy(framebuffer, picture, imagesize);
dprintf(5, "Bootsplash copy complete\n");
BootsplashActive = 1;
done:
free(filedata);
free(picture);
free(vesa_info);
free(mode_info);
free(jpeg);
free(bmp);
return;
}
void
disable_bootsplash(void)
{
if (!CONFIG_BOOTSPLASH || !BootsplashActive)
return;
BootsplashActive = 0;
enable_vga_console();
}
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