Graphics Class Reference

#include <load_elf.h>

Collaboration diagram for Graphics:

Public Member Functions
	Graphics ()
	~Graphics ()=default
void	set_mode (EFI_GRAPHICS_PIXEL_FORMAT _format=PixelBlueGreenRedReserved8BitPerColor, uint32_t _width=DEFAULT_WIDTH, uint32_t _height=DEFAULT_HEIGHT) const
void	print_info () const
不使用的构造函数
	Graphics (const Graphics &)=delete
	Graphics (Graphics &&)=delete
auto	operator= (const Graphics &) -> Graphics &=delete
auto	operator= (Graphics &&) -> Graphics &=delete

Private Attributes
EFI_GRAPHICS_OUTPUT_PROTOCOL *	gop = nullptr

Static Private Attributes
默认分辨率
static constexpr const uint32_t	DEFAULT_WIDTH = 1920
static constexpr const uint32_t	DEFAULT_HEIGHT = 1080

Detailed Description

图形相关

Definition at line 39 of file load_elf.h.

Constructor & Destructor Documentation

Graphics() [1/3]

Graphics::Graphics

(

)

构造函数

Definition at line 22 of file graphics.cpp.

                   {
  auto status = LibLocateProtocol(&GraphicsOutputProtocol,
                                  reinterpret_cast<void **>(&gop));
  if (EFI_ERROR(status)) {
    debug << L"Could not locate GOP: " << status << ostream::endl;
    throw std::runtime_error("EFI_ERROR(status)");
  }
  if (gop == nullptr) {
    debug << L"LibLocateProtocol(GraphicsOutputProtocol, &gop) returned "
          << status << " but gop is nullptr" << ostream::endl;
 
    throw std::runtime_error("gop == nullptr");
  }
}

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~Graphics()

Graphics::~Graphics ( )

default

析构函数

Graphics() [2/3]

Graphics::Graphics ( const Graphics &  )

delete

Graphics() [3/3]

Graphics::Graphics ( Graphics &&  )

delete

Member Function Documentation

operator=() [1/2]

auto Graphics::operator= ( const Graphics &  ) -> Graphics &=delete

delete

operator=() [2/2]

auto Graphics::operator= ( Graphics &&  ) -> Graphics &=delete

delete

print_info()

void Graphics::print_info

(

)

const

输出图形信息

Definition at line 78 of file graphics.cpp.

                                {
  debug << L"Current Mode: " << gop->Mode->Mode << L", Version: "
        << ostream::hex_x << gop->Mode->Info->Version << L", Format: "
        << gop->Mode->Info->PixelFormat << L", Horizontal: "
        << gop->Mode->Info->HorizontalResolution << L", Vertical: "
        << gop->Mode->Info->VerticalResolution << L", ScanLine: "
        << gop->Mode->Info->PixelsPerScanLine << L", FrameBufferBase: "
        << ostream::hex_X << gop->Mode->FrameBufferBase
        << L", FrameBufferSize: " << ostream::hex_X
        << gop->Mode->FrameBufferSize << ostream::endl;
 
  for (uint32_t i = 0; i < gop->Mode->MaxMode; i++) {
    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *mode_info = nullptr;
    uint64_t mode_info_size = 0;
    auto status = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &mode_info_size,
                                    &mode_info);
    if (EFI_ERROR(status)) {
      debug << L"QueryMode failed: " << status << ostream::endl;
      throw std::runtime_error("EFI_ERROR(status)");
    }
 
    debug << L"Mode: " << i << L", Version: " << ostream::hex_x
          << gop->Mode->Info->Version << L", Format: "
          << gop->Mode->Info->PixelFormat << L", Horizontal: "
          << gop->Mode->Info->HorizontalResolution << L", Vertical: "
          << gop->Mode->Info->VerticalResolution << L", ScanLine: "
          << gop->Mode->Info->PixelsPerScanLine << ostream::endl;
 
    status = uefi_call_wrapper(gBS->FreePool, 1, mode_info);
    if (EFI_ERROR(status)) {
      debug << L"FreePool failed: " << status << ostream::endl;
      throw std::runtime_error("EFI_ERROR(status)");
    }
  }
}

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set_mode()

void Graphics::set_mode	(	EFI_GRAPHICS_PIXEL_FORMAT	_format = PixelBlueGreenRedReserved8BitPerColor,
		uint32_t	_width = DEFAULT_WIDTH,
		uint32_t	_height = DEFAULT_HEIGHT
	)		const

设置图形模式

Parameters

_format	图形像素格式，默认为 PixelBlueGreenRedReserved8BitPerColor
_width	宽度，默认为 1920
_height	高度，默认为 1080

Definition at line 37 of file graphics.cpp.

                                                {
  EFI_STATUS status = EFI_SUCCESS;
 
  for (uint32_t i = 0; i < gop->Mode->MaxMode; i++) {
    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *mode_info = nullptr;
    uint64_t mode_info_size = 0;
    status = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &mode_info_size,
                               &mode_info);
    if (EFI_ERROR(status)) {
      debug << L"QueryMode failed: " << status << ostream::endl;
      throw std::runtime_error("EFI_ERROR(status)");
    }
 
    if ((mode_info->PixelFormat == _format) &&
        (mode_info->HorizontalResolution == _width) &&
        (mode_info->VerticalResolution == _height)) {
      status = uefi_call_wrapper(gop->SetMode, 2, gop, i);
      if (EFI_ERROR(status)) {
        debug << L"SetMode failed: " << status << ostream::endl;
        throw std::runtime_error("EFI_ERROR(status)");
      }
    }
    status = uefi_call_wrapper(gBS->FreePool, 1, mode_info);
    if (EFI_ERROR(status)) {
      debug << L"FreePool failed: " << status << ostream::endl;
      throw std::runtime_error("EFI_ERROR(status)");
    }
  }
 
  debug << L"Current Mode: " << gop->Mode->Mode << L", Version: "
        << ostream::hex_x << gop->Mode->Info->Version << L", Format: "
        << gop->Mode->Info->PixelFormat << L", Horizontal: "
        << gop->Mode->Info->HorizontalResolution << L", Vertical: "
        << gop->Mode->Info->VerticalResolution << L", ScanLine: "
        << gop->Mode->Info->PixelsPerScanLine << L", FrameBufferBase: "
        << ostream::hex_X << gop->Mode->FrameBufferBase
        << L", FrameBufferSize: " << ostream::hex_X
        << gop->Mode->FrameBufferSize << ostream::endl;
}

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Member Data Documentation

DEFAULT_HEIGHT

constexpr const uint32_t Graphics::DEFAULT_HEIGHT = 1080

staticconstexprprivate

Definition at line 78 of file load_elf.h.

DEFAULT_WIDTH

constexpr const uint32_t Graphics::DEFAULT_WIDTH = 1920

staticconstexprprivate

Definition at line 77 of file load_elf.h.

gop

EFI_GRAPHICS_OUTPUT_PROTOCOL* Graphics::gop = nullptr

private

图形输出协议

Definition at line 81 of file load_elf.h.

---

The documentation for this class was generated from the following files:

• /home/runner/work/SimpleKernel/SimpleKernel/src/boot/include/load_elf.h
• /home/runner/work/SimpleKernel/SimpleKernel/src/boot/graphics.cpp