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/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Copyright (C) 2012-2013 Kay Sievers <kay@vrfy.org>
* Copyright (C) 2012 Harald Hoyer <harald@redhat.com>
*/
#include <efi.h>
#include <efilib.h>
#include "graphics.h"
#include "splash.h"
#include "util.h"
struct bmp_file {
CHAR8 signature[2];
UINT32 size;
UINT16 reserved[2];
UINT32 offset;
} __attribute__((packed));
/* we require at least BITMAPINFOHEADER, later versions are
accepted, but their features ignored */
struct bmp_dib {
UINT32 size;
UINT32 x;
UINT32 y;
UINT16 planes;
UINT16 depth;
UINT32 compression;
UINT32 image_size;
INT32 x_pixel_meter;
INT32 y_pixel_meter;
UINT32 colors_used;
UINT32 colors_important;
} __attribute__((packed));
struct bmp_map {
UINT8 blue;
UINT8 green;
UINT8 red;
UINT8 reserved;
} __attribute__((packed));
EFI_STATUS bmp_parse_header(UINT8 *bmp, UINTN size, struct bmp_dib **ret_dib,
struct bmp_map **ret_map, UINT8 **pixmap) {
struct bmp_file *file;
struct bmp_dib *dib;
struct bmp_map *map;
UINTN row_size;
if (size < sizeof(struct bmp_file) + sizeof(struct bmp_dib))
return EFI_INVALID_PARAMETER;
/* check file header */
file = (struct bmp_file *)bmp;
if (file->signature[0] != 'B' || file->signature[1] != 'M')
return EFI_INVALID_PARAMETER;
if (file->size != size)
return EFI_INVALID_PARAMETER;
if (file->size < file->offset)
return EFI_INVALID_PARAMETER;
/* check device-independent bitmap */
dib = (struct bmp_dib *)(bmp + sizeof(struct bmp_file));
if (dib->size < sizeof(struct bmp_dib))
return EFI_UNSUPPORTED;
switch (dib->depth) {
case 1:
case 4:
case 8:
case 24:
if (dib->compression != 0)
return EFI_UNSUPPORTED;
break;
case 16:
case 32:
if (dib->compression != 0 && dib->compression != 3)
return EFI_UNSUPPORTED;
break;
default:
return EFI_UNSUPPORTED;
}
row_size = ((UINTN) dib->depth * dib->x + 31) / 32 * 4;
if (file->size - file->offset < dib->y * row_size)
return EFI_INVALID_PARAMETER;
if (row_size * dib->y > 64 * 1024 * 1024)
return EFI_INVALID_PARAMETER;
/* check color table */
map = (struct bmp_map *)(bmp + sizeof(struct bmp_file) + dib->size);
if (file->offset < sizeof(struct bmp_file) + dib->size)
return EFI_INVALID_PARAMETER;
if (file->offset > sizeof(struct bmp_file) + dib->size) {
UINT32 map_count;
UINTN map_size;
if (dib->colors_used)
map_count = dib->colors_used;
else {
switch (dib->depth) {
case 1:
case 4:
case 8:
map_count = 1 << dib->depth;
break;
default:
map_count = 0;
break;
}
}
map_size = file->offset - (sizeof(struct bmp_file) + dib->size);
if (map_size != sizeof(struct bmp_map) * map_count)
return EFI_INVALID_PARAMETER;
}
*ret_map = map;
*ret_dib = dib;
*pixmap = bmp + file->offset;
return EFI_SUCCESS;
}
static VOID pixel_blend(UINT32 *dst, const UINT32 source) {
UINT32 alpha, src, src_rb, src_g, dst_rb, dst_g, rb, g;
alpha = (source & 0xff);
/* convert src from RGBA to XRGB */
src = source >> 8;
/* decompose into RB and G components */
src_rb = (src & 0xff00ff);
src_g = (src & 0x00ff00);
dst_rb = (*dst & 0xff00ff);
dst_g = (*dst & 0x00ff00);
/* blend */
rb = ((((src_rb - dst_rb) * alpha + 0x800080) >> 8) + dst_rb) & 0xff00ff;
g = ((((src_g - dst_g) * alpha + 0x008000) >> 8) + dst_g) & 0x00ff00;
*dst = (rb | g);
}
EFI_STATUS bmp_to_blt(EFI_GRAPHICS_OUTPUT_BLT_PIXEL *buf,
struct bmp_dib *dib, struct bmp_map *map,
UINT8 *pixmap) {
UINT8 *in;
UINTN y;
/* transform and copy pixels */
in = pixmap;
for (y = 0; y < dib->y; y++) {
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *out;
UINTN row_size;
UINTN x;
out = &buf[(dib->y - y - 1) * dib->x];
for (x = 0; x < dib->x; x++, in++, out++) {
switch (dib->depth) {
case 1: {
UINTN i;
for (i = 0; i < 8 && x < dib->x; i++) {
out->Red = map[((*in) >> (7 - i)) & 1].red;
out->Green = map[((*in) >> (7 - i)) & 1].green;
out->Blue = map[((*in) >> (7 - i)) & 1].blue;
out++;
x++;
}
out--;
x--;
break;
}
case 4: {
UINTN i;
i = (*in) >> 4;
out->Red = map[i].red;
out->Green = map[i].green;
out->Blue = map[i].blue;
if (x < (dib->x - 1)) {
out++;
x++;
i = (*in) & 0x0f;
out->Red = map[i].red;
out->Green = map[i].green;
out->Blue = map[i].blue;
}
break;
}
case 8:
out->Red = map[*in].red;
out->Green = map[*in].green;
out->Blue = map[*in].blue;
break;
case 16: {
UINT16 i = *(UINT16 *) in;
out->Red = (i & 0x7c00) >> 7;
out->Green = (i & 0x3e0) >> 2;
out->Blue = (i & 0x1f) << 3;
in += 1;
break;
}
case 24:
out->Red = in[2];
out->Green = in[1];
out->Blue = in[0];
in += 2;
break;
case 32: {
UINT32 i = *(UINT32 *) in;
pixel_blend((UINT32 *)out, i);
in += 3;
break;
}
}
}
/* add row padding; new lines always start at 32 bit boundary */
row_size = in - pixmap;
in += ((row_size + 3) & ~3) - row_size;
}
return EFI_SUCCESS;
}
EFI_STATUS graphics_splash(UINT8 *content, UINTN len, const EFI_GRAPHICS_OUTPUT_BLT_PIXEL *background) {
EFI_GRAPHICS_OUTPUT_BLT_PIXEL pixel = {};
EFI_GUID GraphicsOutputProtocolGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput = NULL;
struct bmp_dib *dib;
struct bmp_map *map;
UINT8 *pixmap;
UINT64 blt_size;
VOID *blt = NULL;
UINTN x_pos = 0;
UINTN y_pos = 0;
EFI_STATUS err;
if (!background) {
if (StriCmp(L"Apple", ST->FirmwareVendor) == 0) {
pixel.Red = 0xc0;
pixel.Green = 0xc0;
pixel.Blue = 0xc0;
}
background = &pixel;
}
err = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **)&GraphicsOutput);
if (EFI_ERROR(err))
return err;
err = bmp_parse_header(content, len, &dib, &map, &pixmap);
if (EFI_ERROR(err))
goto err;
if(dib->x < GraphicsOutput->Mode->Info->HorizontalResolution)
x_pos = (GraphicsOutput->Mode->Info->HorizontalResolution - dib->x) / 2;
if(dib->y < GraphicsOutput->Mode->Info->VerticalResolution)
y_pos = (GraphicsOutput->Mode->Info->VerticalResolution - dib->y) / 2;
uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
(EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)background,
EfiBltVideoFill, 0, 0, 0, 0,
GraphicsOutput->Mode->Info->HorizontalResolution,
GraphicsOutput->Mode->Info->VerticalResolution, 0);
/* EFI buffer */
blt_size = dib->x * dib->y * sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
blt = AllocatePool(blt_size);
if (!blt)
return EFI_OUT_OF_RESOURCES;
err = uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
blt, EfiBltVideoToBltBuffer, x_pos, y_pos, 0, 0,
dib->x, dib->y, 0);
if (EFI_ERROR(err))
goto err;
err = bmp_to_blt(blt, dib, map, pixmap);
if (EFI_ERROR(err))
goto err;
err = graphics_mode(TRUE);
if (EFI_ERROR(err))
goto err;
err = uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
blt, EfiBltBufferToVideo, 0, 0, x_pos, y_pos,
dib->x, dib->y, 0);
err:
FreePool(blt);
return err;
}
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