从头开始在 C 中读取和绘制 BMP 图像

如何解决从头开始在 C 中读取和绘制 BMP 图像

我正在开发自己的操作系统，使用 gnu-efi，我编写了一个小的 BMP 图像加载程序。

当我在屏幕上绘制仅在像素上显示蓝色时，我可以成功读取其标题和数据（不确定）。

//蓝色像素是绘制BMP图像

如何用颜色加载它？

EXPLAIN PLAN SET STATEMENT_ID = 'test3' for select * from EVENT where timestamp between 1620741600000 and 1621900800000 and status = 'CANC'; SELECT * FROM PLAN_TABLE WHERE STATEMENT_ID = 'test3'; 颜色取值为 0xFFFFFFFF；

以下是我的 bmp 加载器：

BMP.h

PlotPixel(x,y,color)

BMP.c

// bmp.h

#define WIN_BITMAP_SIGNATURE 0x4D42           // BM [ASCII]
#define BMP_HEADER_SIZE 54
#define DIB_HEADER_SIZE 40

#pragma pack(push,1)

typedef struct
{
    
    uint16_t bfType;            //  The characters "BM"                 - 2 Bytes
    uint32_t bfSize;            //  The size of the file in bytes       - 4 Bytes
    uint16_t bfReserved1;       //  Unused - must be zero               - 2 Bytes
    uint16_t bfReserved2;       //  Unused - must be zero               - 2 Bytes
    
    uint32_t bfOffBits;         //  Offset to start of Pixel Data       - 4 Bytes

    uint32_t biSize;        //  DIB Header Size                         - 4 Bytes
    int32_t biWidth;           //  Width                               - 4 Bytes
    int32_t biHeight;
    uint16_t biPlanes;
    uint16_t biBitCount;
    uint32_t biCompression;
    uint32_t biSizeImage;
    int32_t biXPexelsPerMeter;
    int32_t biYPexelsPerMeter;
    uint32_t biClrUsed;
    uint32_t biClrImportant;

} BITMAP_HEADER;


typedef struct
{
    
    BITMAP_HEADER* header;
    uint8_t* data;

} BITMAP_IMG;


typedef struct
{
    uint32_t    red_mask;
    uint32_t    green_mask;
    uint32_t    blue_mask;
    uint32_t    alpha_mask;
    uint32_t    color_space_type;
    uint32_t    unused[16];
} BMPColorHeader;


#pragma pack(pop)


unsigned long createRGBA(int r,int g,int b,int a);

unsigned long createRGB(int r,int b);

BITMAP_IMG* LoadBMPImage(EFI_FILE* Directory,CHAR16* Path,EFI_HANDLE ImageHandle,EFI_SYstem_TABLE* SystemTable);