EFI_STATUS Status; EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop; // 获取UEFI GOP协议接口 EFI_STATUS GetGOPInterface() { Status = gBS->LocateProtocol(&gEfiGraphicsOutputProtocolGuid, NULL, (VOID**)&Gop); if (EFI_ERROR(Status)) { Print(L"Failed to locate GOP protocol\n"); return Status; } return...
我们也可以使用GOP和字模库一起来使用GOP driver生产出Graphics Output protocol进而生产出Simple Text Output Protocol,这样我们就可以从终端输出各种类型和编码的文字了(MdeModulePkg/Universal/Console/GraphicsConsoleDxe)。 1· Block transfer to fill a region of the frame buffer 2· Block transfer from system ...
I was trying to display something on screen using UEFI. Almost PC which had UEFI drawed well with framebuffer. But one PC had older UEFI and I had to draw using Blt function in EFI_GRAPHICS_OUTPUT_PROTOCOL.(Probably because that PC's IGP had no UEFI module..) But whenever I try it,...
查看UEFI spec(对照UEFI spec 2.8),有个关于显示的PROTOCOL,截图如下(uefi spec 2.8 page 448): 图3 EFI_GRAPHICS_OUTPUT_PROTOCOL 开始写代码。 第一个问题就是SetMode。在Spec中提供了两个SetMode函数,一个是EFI_GRAPHICS_OUTPUT_PROTOCOL的,另外一个是EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL的,这让我很困惑。猜测...
legacy BIOS引导模式以vbios int10中断来调用显卡,UEFI 引导模式以uefi graphics output protocol (GOP)...
(VOID **)&GraphicsOutput); if (EFI_ERROR(Status)) { Print(L"LocateProtocol %r\n", Status); } return Status;}void ShowFrame(AVFrame *pFrame, int width, int height, int iFrame){ if(GraphicsOutput) GraphicsOutput->Blt( GraphicsOutput, (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)pFrame->data[0]...
BOOT.XF.4.1/boot_images/QcomPkg/Include/Protocol/EFIDisplayUtils.h Protocol接口 学习UEFI,比较关键的是: 0、了解UEFI是如何实现的 1、了解XXX_PROTOCOL定义中有什么接口可以使用:方便我们找到实现的原型 2、找到对应的XXX_PROTOCOL_GUID是多少:方便我们找到哪里调用了对应的接口 ...
ARM-UEFI系统中只需实现HDMI显示驱动程序即可实现显示控制台的输出。HDMI显示驱动程序实现图像输出协议EFI_GRAPHICS_OUTPUT_PROTOCOL,该协议提供服务接口给图像控制台驱动程序GraphicsConsoledxe, 再由该驱动程序实现简单文本输出协议EFI_SIMPLE_TEXTOUT_ PROTOCOL,最后由虚拟控制台驱动程序Consoleplitterdxe将所有挂载简单文本...
这个Protocol的结构如下: /// /// The SIMPLE_TEXT_OUTPUT protocol is used to control text-based output devices. /// It is the minimum required protocol for any handle supplied as the ConsoleOut /// or StandardError device. In addition, the minimum supported text mode of such ...
1. 显卡带老式OpRom,UEFI BIOS带有CSM模块,可以驱动opROM 2. 显卡带有新式GOP驱动。和板载一样处理...