我有这个项目，我需要配置一些关于显卡的东西，它有一个 vbe.h 文件，我不知道如何使用它。
#ifndef __VBE_H
#define __VBE_H
#include <stdint.h>
/** @defgroup vbe vbe
* @{
*
* Functions related to the VBE standard
*/
/** @name VBE Mode Info Block */
/**@{
*
* Packed VBE Mode Info Block
*/
typedef struct {
/* Mandatory information for all VBE revisions */
uint16_t ModeAttributes; /**< @brief mode attributes */
uint8_t WinAAttributes; /**< @brief window A attributes */
uint8_t WinBAttributes; /**< @brief window B attributes */
uint16_t WinGranularity; /**< @brief window granularity */
uint16_t WinSize; /**< @brief window size */
uint16_t WinASegment; /**< @brief window A start segment */
uint16_t WinBSegment; /**< @brief window B start segment */
phys_bytes WinFuncPtr; /**< @brief real mode/far pointer to window function */
uint16_t BytesPerScanLine; /**< @brief bytes per scan line */
/* Mandatory information for VBE 1.2 and above */
uint16_t XResolution; /**< @brief horizontal resolution in pixels/characters */
uint16_t YResolution; /**< @brief vertical resolution in pixels/characters */
uint8_t XCharSize; /**< @brief character cell width in pixels */
uint8_t YCharSize; /**< @brief character cell height in pixels */
uint8_t NumberOfPlanes; /**< @brief number of memory planes */
uint8_t BitsPerPixel; /**< @brief bits per pixel */
uint8_t NumberOfBanks; /**< @brief number of banks */
uint8_t MemoryModel; /**< @brief memory model type */
uint8_t BankSize; /**< @brief bank size in KB */
uint8_t NumberOfImagePages; /**< @brief number of images */
uint8_t Reserved1; /**< @brief reserved for page function */
/* Direct Color fields (required for direct/6 and YUV/7 memory models) */
uint8_t RedMaskSize; /* size of direct color red mask in bits */
uint8_t RedFieldPosition; /* bit position of lsb of red mask */
uint8_t GreenMaskSize; /* size of direct color green mask in bits */
uint8_t GreenFieldPosition; /* bit position of lsb of green mask */
uint8_t BlueMaskSize; /* size of direct color blue mask in bits */
uint8_t BlueFieldPosition; /* bit position of lsb of blue mask */
uint8_t RsvdMaskSize; /* size of direct color reserved mask in bits */
uint8_t RsvdFieldPosition; /* bit position of lsb of reserved mask */
uint8_t DirectColorModeInfo; /* direct color mode attributes */
/* Mandatory information for VBE 2.0 and above */
phys_bytes PhysBasePtr; /**< @brief physical address for flat memory frame buffer */
uint8_t Reserved2[4]; /**< @brief Reserved - always set to 0 */
uint8_t Reserved3[2]; /**< @brief Reserved - always set to 0 */
/* Mandatory information for VBE 3.0 and above */
uint16_t LinBytesPerScanLine; /* bytes per scan line for linear modes */
uint8_t BnkNumberOfImagePages; /* number of images for banked modes */
uint8_t LinNumberOfImagePages; /* number of images for linear modes */
uint8_t LinRedMaskSize; /* size of direct color red mask (linear modes) */
uint8_t LinRedFieldPosition; /* bit position of lsb of red mask (linear modes) */
uint8_t LinGreenMaskSize; /* size of direct color green mask (linear modes) */
uint8_t LinGreenFieldPosition; /* bit position of lsb of green mask (linear modes) */
uint8_t LinBlueMaskSize; /* size of direct color blue mask (linear modes) */
uint8_t LinBlueFieldPosition; /* bit position of lsb of blue mask (linear modes ) */
uint8_t LinRsvdMaskSize; /* size of direct color reserved mask (linear modes) */
uint8_t LinRsvdFieldPosition; /* bit position of lsb of reserved mask (linear modes) */
uint32_t MaxPixelClock; /* maximum pixel clock (in Hz) for graphics mode */
uint8_t Reserved4[190]; /* remainder of ModeInfoBlock */
} __attribute__((packed)) vbe_mode_info_t;
/** @} end of vbe_mode_info_t*/
/**
* @brief Returns information on the input VBE mode, including screen dimensions, color depth and VRAM physical address
*
* Initializes unpacked vbe_mode__info_t structure passed as an address with
* the information of the input mode, by calling VBE function 0x01
* Return VBE Mode Information and unpacking the ModeInfoBlock struct
* returned by that function.
*
* @param mode mode whose information should be returned
* @param vmi_p address of vbe_mode_info_t structure to be initialized
* @return 0 on success, non-zero otherwise
*/
int vbe_get_mode_info(unsigned short mode, vbe_mode_info_t *vmi_p);
/** @} end of vbe */
#endif /* __VBE_H */
我想知道如何使用 RedMaskSize、RedFieldPosition 等功能。任何想法？
问候