src/boot/efi/splash.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify it
   3  * under the terms of the GNU Lesser General Public License as published by
   4  * the Free Software Foundation; either version 2.1 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * This program is distributed in the hope that it will be useful, but
   8  * WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10  * Lesser General Public License for more details.
  11  *
  12  * Copyright (C) 2012-2013 Kay Sievers <kay@vrfy.org>
  13  * Copyright (C) 2012 Harald Hoyer <harald@redhat.com>
  14  */
  15
  16 #include <efi.h>
  17 #include <efilib.h>
  18
  19 #include "graphics.h"
  20 #include "splash.h"
  21 #include "util.h"
  22
  23 struct bmp_file {
  24         CHAR8 signature[2];
  25         UINT32 size;
  26         UINT16 reserved[2];
  27         UINT32 offset;
  28 } __attribute__((packed));
  29
  30 /* we require at least BITMAPINFOHEADER, later versions are
  31    accepted, but their features ignored */
  32 struct bmp_dib {
  33         UINT32 size;
  34         UINT32 x;
  35         UINT32 y;
  36         UINT16 planes;
  37         UINT16 depth;
  38         UINT32 compression;
  39         UINT32 image_size;
  40         INT32 x_pixel_meter;
  41         INT32 y_pixel_meter;
  42         UINT32 colors_used;
  43         UINT32 colors_important;
  44 } __attribute__((packed));
  45
  46 struct bmp_map {
  47         UINT8 blue;
  48         UINT8 green;
  49         UINT8 red;
  50         UINT8 reserved;
  51 } __attribute__((packed));
  52
  53 EFI_STATUS bmp_parse_header(UINT8 *bmp, UINTN size, struct bmp_dib **ret_dib,
  54                             struct bmp_map **ret_map, UINT8 **pixmap) {
  55         struct bmp_file *file;
  56         struct bmp_dib *dib;
  57         struct bmp_map *map;
  58         UINTN row_size;
  59
  60         if (size < sizeof(struct bmp_file) + sizeof(struct bmp_dib))
  61                 return EFI_INVALID_PARAMETER;
  62
  63         /* check file header */
  64         file = (struct bmp_file *)bmp;
  65         if (file->signature[0] != 'B' || file->signature[1] != 'M')
  66                 return EFI_INVALID_PARAMETER;
  67         if (file->size != size)
  68                 return EFI_INVALID_PARAMETER;
  69         if (file->size < file->offset)
  70                 return EFI_INVALID_PARAMETER;
  71
  72         /*  check device-independent bitmap */
  73         dib = (struct bmp_dib *)(bmp + sizeof(struct bmp_file));
  74         if (dib->size < sizeof(struct bmp_dib))
  75                 return EFI_UNSUPPORTED;
  76
  77         switch (dib->depth) {
  78         case 1:
  79         case 4:
  80         case 8:
  81         case 24:
  82                 if (dib->compression != 0)
  83                         return EFI_UNSUPPORTED;
  84
  85                 break;
  86
  87         case 16:
  88         case 32:
  89                 if (dib->compression != 0 && dib->compression != 3)
  90                         return EFI_UNSUPPORTED;
  91
  92                 break;
  93
  94         default:
  95                 return EFI_UNSUPPORTED;
  96         }
  97
  98         row_size = ((UINTN) dib->depth * dib->x + 31) / 32 * 4;
  99         if (file->size - file->offset <  dib->y * row_size)
 100                 return EFI_INVALID_PARAMETER;
 101         if (row_size * dib->y > 64 * 1024 * 1024)
 102                 return EFI_INVALID_PARAMETER;
 103
 104         /* check color table */
 105         map = (struct bmp_map *)(bmp + sizeof(struct bmp_file) + dib->size);
 106         if (file->offset < sizeof(struct bmp_file) + dib->size)
 107                 return EFI_INVALID_PARAMETER;
 108
 109         if (file->offset > sizeof(struct bmp_file) + dib->size) {
 110                 UINT32 map_count;
 111                 UINTN map_size;
 112
 113                 if (dib->colors_used)
 114                         map_count = dib->colors_used;
 115                 else {
 116                         switch (dib->depth) {
 117                         case 1:
 118                         case 4:
 119                         case 8:
 120                                 map_count = 1 << dib->depth;
 121                                 break;
 122
 123                         default:
 124                                 map_count = 0;
 125                                 break;
 126                         }
 127                 }
 128
 129                 map_size = file->offset - (sizeof(struct bmp_file) + dib->size);
 130                 if (map_size != sizeof(struct bmp_map) * map_count)
 131                         return EFI_INVALID_PARAMETER;
 132         }
 133
 134         *ret_map = map;
 135         *ret_dib = dib;
 136         *pixmap = bmp + file->offset;
 137
 138         return EFI_SUCCESS;
 139 }
 140
 141 static VOID pixel_blend(UINT32 *dst, const UINT32 source) {
 142         UINT32 alpha, src, src_rb, src_g, dst_rb, dst_g, rb, g;
 143
 144         alpha = (source & 0xff);
 145
 146         /* convert src from RGBA to XRGB */
 147         src = source >> 8;
 148
 149         /* decompose into RB and G components */
 150         src_rb = (src & 0xff00ff);
 151         src_g  = (src & 0x00ff00);
 152
 153         dst_rb = (*dst & 0xff00ff);
 154         dst_g  = (*dst & 0x00ff00);
 155
 156         /* blend */
 157         rb = ((((src_rb - dst_rb) * alpha + 0x800080) >> 8) + dst_rb) & 0xff00ff;
 158         g  = ((((src_g  -  dst_g) * alpha + 0x008000) >> 8) +  dst_g) & 0x00ff00;
 159
 160         *dst = (rb | g);
 161 }
 162
 163 EFI_STATUS bmp_to_blt(EFI_GRAPHICS_OUTPUT_BLT_PIXEL *buf,
 164                       struct bmp_dib *dib, struct bmp_map *map,
 165                       UINT8 *pixmap) {
 166         UINT8 *in;
 167         UINTN y;
 168
 169         /* transform and copy pixels */
 170         in = pixmap;
 171         for (y = 0; y < dib->y; y++) {
 172                 EFI_GRAPHICS_OUTPUT_BLT_PIXEL *out;
 173                 UINTN row_size;
 174                 UINTN x;
 175
 176                 out = &buf[(dib->y - y - 1) * dib->x];
 177                 for (x = 0; x < dib->x; x++, in++, out++) {
 178                         switch (dib->depth) {
 179                         case 1: {
 180                                 UINTN i;
 181
 182                                 for (i = 0; i < 8 && x < dib->x; i++) {
 183                                         out->Red = map[((*in) >> (7 - i)) & 1].red;
 184                                         out->Green = map[((*in) >> (7 - i)) & 1].green;
 185                                         out->Blue = map[((*in) >> (7 - i)) & 1].blue;
 186                                         out++;
 187                                         x++;
 188                                 }
 189                                 out--;
 190                                 x--;
 191                                 break;
 192                         }
 193
 194                         case 4: {
 195                                 UINTN i;
 196
 197                                 i = (*in) >> 4;
 198                                 out->Red = map[i].red;
 199                                 out->Green = map[i].green;
 200                                 out->Blue = map[i].blue;
 201                                 if (x < (dib->x - 1)) {
 202                                         out++;
 203                                         x++;
 204                                         i = (*in) & 0x0f;
 205                                         out->Red = map[i].red;
 206                                         out->Green = map[i].green;
 207                                         out->Blue = map[i].blue;
 208                                 }
 209                                 break;
 210                         }
 211
 212                         case 8:
 213                                 out->Red = map[*in].red;
 214                                 out->Green = map[*in].green;
 215                                 out->Blue = map[*in].blue;
 216                                 break;
 217
 218                         case 16: {
 219                                 UINT16 i = *(UINT16 *) in;
 220
 221                                 out->Red = (i & 0x7c00) >> 7;
 222                                 out->Green = (i & 0x3e0) >> 2;
 223                                 out->Blue = (i & 0x1f) << 3;
 224                                 in += 1;
 225                                 break;
 226                         }
 227
 228                         case 24:
 229                                 out->Red = in[2];
 230                                 out->Green = in[1];
 231                                 out->Blue = in[0];
 232                                 in += 2;
 233                                 break;
 234
 235                         case 32: {
 236                                 UINT32 i = *(UINT32 *) in;
 237
 238                                 pixel_blend((UINT32 *)out, i);
 239
 240                                 in += 3;
 241                                 break;
 242                         }
 243                         }
 244                 }
 245
 246                 /* add row padding; new lines always start at 32 bit boundary */
 247                 row_size = in - pixmap;
 248                 in += ((row_size + 3) & ~3) - row_size;
 249         }
 250
 251         return EFI_SUCCESS;
 252 }
 253
 254 EFI_STATUS graphics_splash(UINT8 *content, UINTN len, const EFI_GRAPHICS_OUTPUT_BLT_PIXEL *background) {
 255         EFI_GRAPHICS_OUTPUT_BLT_PIXEL pixel = {};
 256         EFI_GUID GraphicsOutputProtocolGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
 257         EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput = NULL;
 258         struct bmp_dib *dib;
 259         struct bmp_map *map;
 260         UINT8 *pixmap;
 261         UINT64 blt_size;
 262         VOID *blt = NULL;
 263         UINTN x_pos = 0;
 264         UINTN y_pos = 0;
 265         EFI_STATUS err;
 266
 267         if (!background) {
 268                 if (StriCmp(L"Apple", ST->FirmwareVendor) == 0) {
 269                         pixel.Red = 0xc0;
 270                         pixel.Green = 0xc0;
 271                         pixel.Blue = 0xc0;
 272                 }
 273                 background = &pixel;
 274         }
 275
 276         err = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **)&GraphicsOutput);
 277         if (EFI_ERROR(err))
 278                 return err;
 279
 280         err = bmp_parse_header(content, len, &dib, &map, &pixmap);
 281         if (EFI_ERROR(err))
 282                 goto err;
 283
 284         if (dib->x < GraphicsOutput->Mode->Info->HorizontalResolution)
 285                 x_pos = (GraphicsOutput->Mode->Info->HorizontalResolution - dib->x) / 2;
 286         if (dib->y < GraphicsOutput->Mode->Info->VerticalResolution)
 287                 y_pos = (GraphicsOutput->Mode->Info->VerticalResolution - dib->y) / 2;
 288
 289         uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
 290                           (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)background,
 291                           EfiBltVideoFill, 0, 0, 0, 0,
 292                           GraphicsOutput->Mode->Info->HorizontalResolution,
 293                           GraphicsOutput->Mode->Info->VerticalResolution, 0);
 294
 295         /* EFI buffer */
 296         blt_size = dib->x * dib->y * sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
 297         blt = AllocatePool(blt_size);
 298         if (!blt)
 299                 return EFI_OUT_OF_RESOURCES;
 300
 301         err = uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
 302                                 blt, EfiBltVideoToBltBuffer, x_pos, y_pos, 0, 0,
 303                                 dib->x, dib->y, 0);
 304         if (EFI_ERROR(err))
 305                 goto err;
 306
 307         err = bmp_to_blt(blt, dib, map, pixmap);
 308         if (EFI_ERROR(err))
 309                 goto err;
 310
 311         err = graphics_mode(TRUE);
 312         if (EFI_ERROR(err))
 313                 goto err;
 314
 315         err = uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
 316                                 blt, EfiBltBufferToVideo, 0, 0, x_pos, y_pos,
 317                                 dib->x, dib->y, 0);
 318 err:
 319         FreePool(blt);
 320         return err;
 321 }