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/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Data structure definitions for firmware screen block (BMPBLOCK).
*
* The BmpBlock structure looks like:
* +-----------------------------------------+
* | BmpBlock Header |
* +-----------------------------------------+
* | ScreenLayout[0] | \
* +-----------------------------------------+ |
* | ScreenLayout[1] | |
* +-----------------------------------------+ Localization[0]
* | ... | |
* +-----------------------------------------+ |
* | ScreenLayout[number_of_screenlayouts-1] | /
* +-----------------------------------------+
* | ScreenLayout[0] | \
* +-----------------------------------------+ Localization[1]
* | ... | /
* +-----------------------------------------+ ...
* | ScreenLayout[0] | \
* +-----------------------------------------+ Localization[
* | ... | / number_of_localizations-1]
* +-----------------------------------------+
* | ImageInfo[0] |
* +-----------------------------------------+
* | Image Content |
* +-----------------------------------------+
* | ImageInfo[2] | ImageInfo is 4-byte aligned.
* +-----------------------------------------+
* | Image Content |
* +-----------------------------------------+
* | ... |
* +-----------------------------------------+
* | ImageInfo[number_fo_images-1] |
* +-----------------------------------------+
* | Image Content |
* +-----------------------------------------+
*
*/
#ifndef VBOOT_REFERENCE_BMPBLK_HEADER_H_
#define VBOOT_REFERENCE_BMPBLK_HEADER_H_
#include "sysincludes.h"
__pragma(pack(push, 1)) /* Support packing for MSVC. */
#define BMPBLOCK_SIGNATURE "$BMP"
#define BMPBLOCK_SIGNATURE_SIZE (4)
#define BMPBLOCK_MAJOR_VERSION (0x0001)
#define BMPBLOCK_MINOR_VERSION (0x0000)
#define MAX_IMAGE_IN_LAYOUT (8)
/* BMPBLOCK header, describing how many screen layouts and image infos */
typedef struct BmpBlockHeader {
uint8_t signature[BMPBLOCK_SIGNATURE_SIZE]; /* BMPBLOCK_SIGNATURE $BMP */
uint16_t major_version; /* see BMPBLOCK_MAJOR_VER */
uint16_t minor_version; /* see BMPBLOCK_MINOR_VER */
uint32_t number_of_localizations; /* Number of localizations */
uint32_t number_of_screenlayouts; /* Number of screen layouts in each
* localization */
uint32_t number_of_imageinfos; /* Number of image infos */
uint32_t reserved[3];
} __attribute__((packed)) BmpBlockHeader;
/* Screen layout, describing how to stack multiple images on screen */
typedef struct ScreenLayout {
struct {
uint32_t x; /* X-offset of the image to be rendered */
uint32_t y; /* Y-offset of the image to be rendered */
uint32_t image_info_offset; /* Offset of image info from start of
* BMPBLOCK. 0 means end of it. */
} images[MAX_IMAGE_IN_LAYOUT]; /* Images contained in the screen. Will be
* rendered from 0 to (number_of_images-1). */
} __attribute__((packed)) ScreenLayout;
/* Constants for screen index */
typedef enum ScreenIndex {
SCREEN_DEVELOPER_MODE = 0,
SCREEN_RECOVERY_MODE,
SCREEN_RECOVERY_NO_OS,
SCREEN_RECOVERY_MISSING_OS,
MAX_SCREEN_INDEX,
} ScreenIndex;
/* Image info, describing the information of the image block */
typedef struct ImageInfo {
uint32_t tag; /* Tag it as a special image, like HWID */
uint32_t width; /* Width of the image */
uint32_t height; /* Height of the image */
uint32_t format; /* File format of the image */
uint32_t compression; /* Compression method for the image file */
uint32_t original_size; /* Size of the original uncompressed image */
uint32_t compressed_size; /* Size of the compressed image */
uint32_t reserved;
/* NOTE: actual image content follows immediately */
} __attribute__((packed)) ImageInfo;
/* Constants for ImageInfo.tag */
typedef enum ImageTag {
TAG_NONE = 0,
TAG_HWID,
} ImageTag;
/* Constants for ImageInfo.format */
typedef enum ImageFormat {
FORMAT_INVALID = 0,
FORMAT_BMP,
} ImageFormat;
/* Constants for ImageInfo.compression */
typedef enum Compression {
COMPRESS_NONE = 0,
COMPRESS_EFIv1, /* The x86 BIOS only supports this */
COMPRESS_TBD, /* Only on ARM? */
MAX_COMPRESS,
} Compression;
__pragma(pack(pop)) /* Support packing for MSVC. */
#endif /* VBOOT_REFERENCE_BMPBLK_HEADER_H_ */
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