Enumerate GOP Supported Modes

Select one of listed modes for your application.

#include <Uefi.h>
#include <Protocol/GraphicsOutput.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <stdio.h>

VOID DisplayModeInfo() {
 printf("[GOP] GOP ver.%X Mode Info :\n", Gop->Mode->Info->Version);
 printf("\tFrame Buffer Base: %08X\n", Gop->Mode->FrameBufferBase);
 printf("\tFrame Buffer Size: %08X\n", Gop->Mode->FrameBufferSize);
 printf("\tMax Mode: %08X\n", Gop->Mode->MaxMode);
 for (UINT32 i = 0; i < Gop->Mode->MaxMode; i++) {
 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
 UINTN infoSize;
 Gop->QueryMode(Gop, i, &infoSize, &info);
 printf("\t\tMode: %X\n", i);
 printf("\t\tResolution: %dx%d\n", info->HorizontalResolution, info->VerticalResolution);
 printf("\t\tPixel Format: %X\n", info->PixelFormat);
 printf("\t\tPixel Information: %08X\n", info->PixelInformation);
 printf("\t\tPixels Per Scanline: %d\n", info->PixelsPerScanLine);
 FreePool(info);
 }
}

The stdio.h is from EADK.