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Print graphics modes

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This commit is contained in:
Josh Holtrop 2022-03-12 10:48:48 -05:00
parent eb15f473c6
commit edd7979b3f
1 changed files with 38 additions and 5 deletions
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43
src/main.c
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@ -38,8 +38,19 @@ static void write_hex64(size_t n)
write_string(s);
}
static void wait_key(void)
{
EFI_INPUT_KEY key;
write_string(L"Press any key...\r\n");
while (g_system_table->ConIn->ReadKeyStroke(g_system_table->ConIn, &key) == EFI_NOT_READY)
{
}
}
static void check_gop_handle(EFI_HANDLE handle)
{
write_string(L"Going to check GOP handle...\r\n");
wait_key();
EFI_HANDLE interface = NULL;
EFI_STATUS status = g_system_table->BootServices->HandleProtocol(handle,
&(EFI_GUID)EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID,
@ -63,6 +74,32 @@ static void check_gop_handle(EFI_HANDLE handle)
write_string(L"\r\n");
EFI_GRAPHICS_OUTPUT_PROTOCOL * gop = (EFI_GRAPHICS_OUTPUT_PROTOCOL *)interface;
UINTN info_size;
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION * info;
for (uint32_t mode_number = 0u;
(status = gop->QueryMode(gop, mode_number, &info_size, &info)) == EFI_SUCCESS;
mode_number++)
{
write_string(L"Mode ");
write_uint(mode_number);
write_string(L": ");
write_uint(info->HorizontalResolution);
write_string(L"x");
write_uint(info->VerticalResolution);
write_string(L" f=");
write_uint(info->PixelFormat);
write_string(L" s=");
write_uint(info->PixelsPerScanLine);
write_string(L"\r\n");
g_system_table->BootServices->FreePool(info);
if ((mode_number % 20) == 19)
{
wait_key();
}
}
write_string(L"Error ");
write_uint(status);
write_string(L" from QueryMode\r\n");
}
static void dump_memory_map(void)
@ -114,7 +151,6 @@ EFI_STATUS
efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE * system_table)
{
EFI_STATUS status;
EFI_INPUT_KEY key;
g_system_table = system_table;
@ -151,10 +187,7 @@ efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE * system_table)
check_gop_handle(buffer[i]);
}
write_string(L"Press any key...\r\n");
while ((status = system_table->ConIn->ReadKeyStroke(system_table->ConIn, &key)) == EFI_NOT_READY)
{
}
wait_key();
return status;
}