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#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Protocol/GraphicsOutput.h>
#include "UefiMonitorTest.h"
CONST EFI_PIXEL_BITMASK mRgbPixelMasks = {
0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000
};
CONST EFI_PIXEL_BITMASK mBgrPixelMasks = {
0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000
};
STATIC
VOID
ParseGraphicsPixelFormat (
IN CONST EFI_PIXEL_BITMASK *BitMask,
OUT UINT32 *PixelWidth,
OUT INT8 *PixelShl,
OUT INT8 *PixelShr
)
{
UINT8 Index;
UINT32 *Masks;
UINT32 MergedMasks;
MergedMasks = 0;
Masks = (UINT32 *)BitMask;
for (Index = 0; Index < 3; Index++) {
ASSERT ((MergedMasks & Masks[Index]) == 0);
PixelShl[Index] = (INT8)HighBitSet32 (Masks[Index]) - 23 + (Index * 8);
if (PixelShl[Index] < 0) {
PixelShr[Index] = -PixelShl[Index];
PixelShl[Index] = 0;
} else {
PixelShr[Index] = 0;
}
DEBUG ((
DEBUG_INFO,
"Index %d: shl:%d shr:%d mask:%08x\n",
Index,
PixelShl[Index],
PixelShr[Index],
Masks[Index]
));
MergedMasks = (UINT32)(MergedMasks | Masks[Index]);
}
MergedMasks = (UINT32)(MergedMasks | Masks[3]);
ASSERT (MergedMasks != 0);
*PixelWidth = (UINT32)((HighBitSet32 (MergedMasks) + 7) / 8);
DEBUG ((DEBUG_INFO, "Bytes per pixel: %d\n", *PixelWidth));
}
STATIC
VOID
PrepareGraphicsInfo (
IN GRAPHICS_CONTEXT *Graphics,
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop
)
{
CONST EFI_PIXEL_BITMASK *BitMask;
UINT32 PixelWidth;
INT8 PixelShl[4];
INT8 PixelShr[4];
ASSERT (Graphics != NULL);
ASSERT (Gop != NULL);
switch (Gop->Mode->Info->PixelFormat) {
case PixelRedGreenBlueReserved8BitPerColor:
BitMask = &mRgbPixelMasks;
break;
case PixelBlueGreenRedReserved8BitPerColor:
BitMask = &mBgrPixelMasks;
break;
case PixelBitMask:
BitMask = &Gop->Mode->Info->PixelInformation;
break;
case PixelBltOnly:
ASSERT (FALSE);
//return RETURN_UNSUPPORTED;
default:
ASSERT (FALSE);
// return RETURN_INVALID_PARAMETER;
}
DEBUG ((
DEBUG_INFO,
"GOP information:\n"
"Mode: %d\n"
"Framebuffer address, size: %x, %d\n"
"Screen width x height: %d x %d\n",
Gop->Mode->Mode,
Gop->Mode->FrameBufferBase, Gop->Mode->FrameBufferSize,
Gop->Mode->Info->HorizontalResolution, Gop->Mode->Info->VerticalResolution
));
ParseGraphicsPixelFormat (BitMask, &PixelWidth, PixelShl, PixelShr);
Graphics->Gop = Gop;
Graphics->FrontBuffer = (UINT8 *)Gop->Mode->FrameBufferBase;
Graphics->BufferSize = Gop->Mode->FrameBufferSize;
Graphics->BackBuffer = AllocateCopyPool (Graphics->BufferSize, Graphics->FrontBuffer);
ASSERT (Graphics->BackBuffer != NULL);
Graphics->Width = Gop->Mode->Info->HorizontalResolution;
Graphics->Height = Gop->Mode->Info->VerticalResolution;
CopyMem (&Graphics->PixelMasks, BitMask, sizeof (*BitMask));
CopyMem (Graphics->PixelShl, PixelShl, sizeof (PixelShl));
CopyMem (Graphics->PixelShr, PixelShr, sizeof (PixelShr));
Graphics->PixelWidth = PixelWidth;
Graphics->Pitch = Graphics->PixelWidth * Gop->Mode->Info->PixelsPerScanLine;
}
STATIC
VOID
ForgetGraphicsInfo (
IN GRAPHICS_CONTEXT *Graphics
)
{
ASSERT (Graphics != NULL);
// Should we zero all the data structure?
FreePool (Graphics->BackBuffer);
}
EFI_GRAPHICS_OUTPUT_PROTOCOL *
GetGraphicsOutputProtocol (
VOID
)
{
EFI_STATUS Status;
EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop;
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *ModeInfo;
UINTN SizeOfInfo;
Status = gBS->LocateProtocol (
&gEfiGraphicsOutputProtocolGuid,
NULL,
(VOID **)&Gop
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Unable to locate GOP\n"));
return NULL;
}
Status = Gop->QueryMode (
Gop,
(Gop->Mode == NULL) ? 0 : Gop->Mode->Mode,
&SizeOfInfo,
&ModeInfo
);
if (Status == EFI_NOT_STARTED) {
Status = Gop->SetMode (Gop, 0);
}
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Unable to get native mode\n"));
return NULL;
}
// TODO: free ModeInfo
return Gop;
}
EFI_STATUS
EFIAPI
UefiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop;
GRAPHICS_CONTEXT Graphics;
Gop = GetGraphicsOutputProtocol ();
if (Gop == NULL) {
Print (L"Error: Getting a Graphical Output Protocol is failed\n");
return EFI_NOT_FOUND;
}
PrepareGraphicsInfo (&Graphics, Gop);
ForgetGraphicsInfo (&Graphics);
return EFI_SUCCESS;
}
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