BIOS实战之读取文件--BMP图片显示

本文主要是介绍BIOS实战之读取文件--BMP图片显示，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

本节直接贴主要的代码：

#include "DisplayBmpTest.h"EFI_STATUS
EFIAPI
ShellAppMain (IN UINTN Argc,IN CHAR16 **Argv)
{EFI_STATUS                       Status;EFI_GRAPHICS_OUTPUT_PROTOCOL     *GraphicsOutput = NULL;UINT8                            *DataBuffer;UINTN                           DataSize;EFI_GRAPHICS_OUTPUT_BLT_PIXEL    *Blt = NULL;UINTN                            BltSize;UINTN                            Height;UINTN                            Width;Status = gBS->LocateProtocol (&gEfiGraphicsOutputProtocolGuid,NULL,(VOID **)&GraphicsOutput);if (EFI_ERROR (Status)) {GraphicsOutput = NULL;Print (L"locate protocol gEfiGraphicsOutputProtocolGuid is error!\n");return Status;}Status = ReadFile (Argv[1], &DataBuffer, &DataSize);if (EFI_ERROR (Status)) {Print (L"Read bmp file to buffer is error!\n");return Status;}Status = TranslateBmpToGopBlt ((VOID *)DataBuffer,DataSize,&Blt,&BltSize,&Height,&Width);if (EFI_ERROR (Status)) {if (Blt != NULL) {FreePool (Blt);}Print (L"TranslateBmpToGopBlt is error!\n");return Status;}Status = GraphicsOutput->Blt (GraphicsOutput,Blt,EfiBltBufferToVideo,0,0,0x0,0x0,Width,Height,Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));if (EFI_ERROR (Status)) {Print (L"GraphicsOutput Blt is error!\n");return Status;}if (Blt != NULL)FreePool (Blt);Status = gST->ConOut->EnableCursor(gST->ConOut,TRUE);return Status;
}

运行后，我们就能读取自己想要显示的图片，并进行显示：

 这里存放了两个位置，一个根目录，一个自己创建的目录，都能正常显示，进行BIOS更新也是同样的道理，读取文件后，进行SPI FLASH的擦写，擦写要注意一点，最小擦写为4k，也就是0x1000。

这篇关于BIOS实战之读取文件--BMP图片显示的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---