--- /dev/null
+/** @file
+
+ Copyright (c) 2011, ARM Ltd. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ **/
+
+#include <PiDxe.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+#include <Guid/GlobalVariable.h>
+
+#include "LcdGraphicsOutputDxe.h"
+
+extern BOOLEAN mDisplayInitialized;
+
+//
+// Function Definitions
+//
+
+STATIC
+EFI_STATUS
+VideoCopyNoHorizontalOverlap (
+ IN UINTN BitsPerPixel,
+ IN volatile VOID *FrameBufferBase,
+ IN UINT32 HorizontalResolution,
+ IN UINTN SourceX,
+ IN UINTN SourceY,
+ IN UINTN DestinationX,
+ IN UINTN DestinationY,
+ IN UINTN Width,
+ IN UINTN Height
+ )
+{
+ EFI_STATUS Status = EFI_SUCCESS;
+ UINTN SourceLine;
+ UINTN DestinationLine;
+ UINTN WidthInBytes;
+ UINTN LineCount;
+ INTN Step;
+ VOID *SourceAddr;
+ VOID *DestinationAddr;
+
+ if( DestinationY <= SourceY ) {
+ // scrolling up (or horizontally but without overlap)
+ SourceLine = SourceY;
+ DestinationLine = DestinationY;
+ Step = 1;
+ } else {
+ // scrolling down
+ SourceLine = SourceY + Height;
+ DestinationLine = DestinationY + Height;
+ Step = -1;
+ }
+
+ WidthInBytes = Width * 2;
+
+ for( LineCount = 0; LineCount < Height; LineCount++ ) {
+ // Update the start addresses of source & destination using 16bit pointer arithmetic
+ SourceAddr = (VOID *)((UINT16 *)FrameBufferBase + SourceLine * HorizontalResolution + SourceX );
+ DestinationAddr = (VOID *)((UINT16 *)FrameBufferBase + DestinationLine * HorizontalResolution + DestinationX);
+
+ // Copy the entire line Y from video ram to the temp buffer
+ CopyMem( DestinationAddr, SourceAddr, WidthInBytes);
+
+ // Update the line numbers
+ SourceLine += Step;
+ DestinationLine += Step;
+ }
+
+ return Status;
+}
+
+STATIC
+EFI_STATUS
+VideoCopyHorizontalOverlap (
+ IN UINTN BitsPerPixel,
+ IN volatile VOID *FrameBufferBase,
+ UINT32 HorizontalResolution,
+ IN UINTN SourceX,
+ IN UINTN SourceY,
+ IN UINTN DestinationX,
+ IN UINTN DestinationY,
+ IN UINTN Width,
+ IN UINTN Height
+ )
+{
+ EFI_STATUS Status = EFI_SUCCESS;
+
+ UINT16 *PixelBuffer16bit;
+ UINT16 *SourcePixel16bit;
+ UINT16 *DestinationPixel16bit;
+
+ UINT32 SourcePixelY;
+ UINT32 DestinationPixelY;
+ UINTN SizeIn16Bits;
+
+ // Allocate a temporary buffer
+ PixelBuffer16bit = (UINT16 *) AllocatePool((Height * Width) * sizeof(UINT16));
+
+ if (PixelBuffer16bit == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto EXIT;
+ }
+
+ // Access each pixel inside the source area of the Video Memory and copy it to the temp buffer
+
+ SizeIn16Bits = Width * 2;
+
+ for (SourcePixelY = SourceY, DestinationPixel16bit = PixelBuffer16bit;
+ SourcePixelY < SourceY + Height;
+ SourcePixelY++, DestinationPixel16bit += Width)
+ {
+ // Calculate the source address:
+ SourcePixel16bit = (UINT16 *)FrameBufferBase + SourcePixelY * HorizontalResolution + SourceX;
+
+ // Copy the entire line Y from Video to the temp buffer
+ CopyMem( (VOID *)DestinationPixel16bit, (CONST VOID *)SourcePixel16bit, SizeIn16Bits);
+ }
+
+ // Copy from the temp buffer into the destination area of the Video Memory
+
+ for (DestinationPixelY = DestinationY, SourcePixel16bit = PixelBuffer16bit;
+ DestinationPixelY < DestinationY + Height;
+ DestinationPixelY++, SourcePixel16bit += Width)
+ {
+ // Calculate the target address:
+ DestinationPixel16bit = (UINT16 *)FrameBufferBase + (DestinationPixelY * HorizontalResolution + DestinationX);
+
+ // Copy the entire line Y from the temp buffer to Video
+ CopyMem( (VOID *)DestinationPixel16bit, (CONST VOID *)SourcePixel16bit, SizeIn16Bits);
+ }
+
+ // Free the allocated memory
+ FreePool((VOID *) PixelBuffer16bit);
+
+
+EXIT:
+ return Status;
+}
+
+STATIC
+EFI_STATUS
+BltVideoFill (
+ IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
+ IN OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL *EfiSourcePixel, OPTIONAL
+ IN UINTN SourceX,
+ IN UINTN SourceY,
+ IN UINTN DestinationX,
+ IN UINTN DestinationY,
+ IN UINTN Width,
+ IN UINTN Height,
+ IN UINTN Delta OPTIONAL // Number of BYTES in a row of the BltBuffer
+ )
+{
+ EFI_PIXEL_BITMASK* PixelInformation;
+ EFI_STATUS Status;
+ UINT32 HorizontalResolution;
+ VOID *FrameBufferBase;
+ UINT16 *DestinationPixel16bit;
+ UINT16 Pixel16bit;
+ UINT32 DestinationPixelX;
+ UINT32 DestinationLine;
+
+ Status = EFI_SUCCESS;
+ PixelInformation = &This->Mode->Info->PixelInformation;
+ FrameBufferBase = (UINTN *)((UINTN)(This->Mode->FrameBufferBase));
+ HorizontalResolution = This->Mode->Info->HorizontalResolution;
+
+ // Convert the EFI pixel at the start of the BltBuffer(0,0) into a video display pixel
+ Pixel16bit = (UINT16) (
+ ( (EfiSourcePixel->Red << 8) & PixelInformation->RedMask )
+ | ( (EfiSourcePixel->Green << 3) & PixelInformation->GreenMask )
+ | ( (EfiSourcePixel->Blue >> 3) & PixelInformation->BlueMask )
+ );
+
+ // Copy the SourcePixel into every pixel inside the target rectangle
+ for (DestinationLine = DestinationY;
+ DestinationLine < DestinationY + Height;
+ DestinationLine++)
+ {
+ for (DestinationPixelX = DestinationX;
+ DestinationPixelX < DestinationX + Width;
+ DestinationPixelX++)
+ {
+ // Calculate the target address:
+ DestinationPixel16bit = (UINT16 *)FrameBufferBase + DestinationLine * HorizontalResolution + DestinationPixelX;
+
+ // Copy the pixel into the new target
+ *DestinationPixel16bit = Pixel16bit;
+ }
+ }
+
+
+ return Status;
+}
+
+STATIC
+EFI_STATUS
+BltVideoToBltBuffer (
+ IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
+ IN OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
+ IN UINTN SourceX,
+ IN UINTN SourceY,
+ IN UINTN DestinationX,
+ IN UINTN DestinationY,
+ IN UINTN Width,
+ IN UINTN Height,
+ IN UINTN Delta OPTIONAL // Number of BYTES in a row of the BltBuffer
+ )
+{
+ EFI_STATUS Status;
+ UINT32 HorizontalResolution;
+ EFI_PIXEL_BITMASK *PixelInformation;
+ EFI_GRAPHICS_OUTPUT_BLT_PIXEL *EfiDestinationPixel;
+ VOID *FrameBufferBase;
+ UINT16 *SourcePixel16bit;
+ UINT16 Pixel16bit;
+ UINT32 SourcePixelX;
+ UINT32 SourceLine;
+ UINT32 DestinationPixelX;
+ UINT32 DestinationLine;
+ UINT32 BltBufferHorizontalResolution;
+
+ Status = EFI_SUCCESS;
+ PixelInformation = &This->Mode->Info->PixelInformation;
+ HorizontalResolution = This->Mode->Info->HorizontalResolution;
+ FrameBufferBase = (UINTN *)((UINTN)(This->Mode->FrameBufferBase));
+
+ if(( Delta != 0 ) && ( Delta != Width * sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL))) {
+ // Delta is not zero and it is different from the width.
+ // Divide it by the size of a pixel to find out the buffer's horizontal resolution.
+ BltBufferHorizontalResolution = (UINT32) (Delta / sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
+ } else {
+ BltBufferHorizontalResolution = Width;
+ }
+
+ // Access each pixel inside the Video Memory
+ for (SourceLine = SourceY, DestinationLine = DestinationY;
+ SourceLine < SourceY + Height;
+ SourceLine++, DestinationLine++)
+ {
+ for (SourcePixelX = SourceX, DestinationPixelX = DestinationX;
+ SourcePixelX < SourceX + Width;
+ SourcePixelX++, DestinationPixelX++)
+ {
+ // Calculate the source and target addresses:
+ SourcePixel16bit = (UINT16 *)FrameBufferBase + SourceLine * HorizontalResolution + SourcePixelX;
+ EfiDestinationPixel = BltBuffer + DestinationLine * BltBufferHorizontalResolution + DestinationPixelX;
+
+ // Snapshot the pixel from the video buffer once, to speed up the operation.
+ // If we were dereferencing the pointer, as it is volatile, we would perform 3 memory read operations.
+ Pixel16bit = *SourcePixel16bit;
+
+ // Copy the pixel into the new target
+ EfiDestinationPixel->Red = (UINT8) ( (Pixel16bit & PixelInformation->RedMask ) >> 8 );
+ EfiDestinationPixel->Green = (UINT8) ( (Pixel16bit & PixelInformation->GreenMask ) >> 3 );
+ EfiDestinationPixel->Blue = (UINT8) ( (Pixel16bit & PixelInformation->BlueMask ) << 3 );
+ }
+ }
+
+ return Status;
+}
+
+STATIC
+EFI_STATUS
+BltBufferToVideo (
+ IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
+ IN OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
+ IN UINTN SourceX,
+ IN UINTN SourceY,
+ IN UINTN DestinationX,
+ IN UINTN DestinationY,
+ IN UINTN Width,
+ IN UINTN Height,
+ IN UINTN Delta OPTIONAL // Number of BYTES in a row of the BltBuffer
+ )
+{
+ EFI_STATUS Status;
+ UINT32 HorizontalResolution;
+ EFI_PIXEL_BITMASK *PixelInformation;
+ EFI_GRAPHICS_OUTPUT_BLT_PIXEL *EfiSourcePixel;
+ VOID *FrameBufferBase;
+ UINT16 *DestinationPixel16bit;
+ UINT32 SourcePixelX;
+ UINT32 SourceLine;
+ UINT32 DestinationPixelX;
+ UINT32 DestinationLine;
+ UINT32 BltBufferHorizontalResolution;
+
+ Status = EFI_SUCCESS;
+ PixelInformation = &This->Mode->Info->PixelInformation;
+ HorizontalResolution = This->Mode->Info->HorizontalResolution;
+ FrameBufferBase = (UINTN *)((UINTN)(This->Mode->FrameBufferBase));
+
+ if(( Delta != 0 ) && ( Delta != Width * sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL))) {
+ // Delta is not zero and it is different from the width.
+ // Divide it by the size of a pixel to find out the buffer's horizontal resolution.
+ BltBufferHorizontalResolution = (UINT32) (Delta / sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
+ } else {
+ BltBufferHorizontalResolution = Width;
+ }
+
+ // Access each pixel inside the BltBuffer Memory
+ for (SourceLine = SourceY, DestinationLine = DestinationY;
+ SourceLine < SourceY + Height;
+ SourceLine++, DestinationLine++) {
+
+ for (SourcePixelX = SourceX, DestinationPixelX = DestinationX;
+ SourcePixelX < SourceX + Width;
+ SourcePixelX++, DestinationPixelX++)
+ {
+ // Calculate the source and target addresses:
+ EfiSourcePixel = BltBuffer + SourceLine * BltBufferHorizontalResolution + SourcePixelX;
+ DestinationPixel16bit = (UINT16 *)FrameBufferBase + DestinationLine * HorizontalResolution + DestinationPixelX;
+
+ // Copy the pixel into the new target
+ // Only the most significant bits will be copied across:
+ // To convert from 8 bits to 5 bits per pixel we throw away the 3 least significant bits
+ *DestinationPixel16bit = (UINT16) (
+ ( (EfiSourcePixel->Red << 8) & PixelInformation->RedMask )
+ | ( (EfiSourcePixel->Green << 3) & PixelInformation->GreenMask )
+ | ( (EfiSourcePixel->Blue >> 3) & PixelInformation->BlueMask )
+ );
+ }
+ }
+
+ return Status;
+}
+
+STATIC
+EFI_STATUS
+BltVideoToVideo (
+ IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
+ IN OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
+ IN UINTN SourceX,
+ IN UINTN SourceY,
+ IN UINTN DestinationX,
+ IN UINTN DestinationY,
+ IN UINTN Width,
+ IN UINTN Height,
+ IN UINTN Delta OPTIONAL // Number of BYTES in a row of the BltBuffer
+ )
+{
+ EFI_STATUS Status;
+ UINT32 HorizontalResolution;
+ UINTN BitsPerPixel;
+ VOID *FrameBufferBase;
+
+ BitsPerPixel = 16;
+
+ HorizontalResolution = This->Mode->Info->HorizontalResolution;
+ FrameBufferBase = (UINTN *)((UINTN)(This->Mode->FrameBufferBase));
+
+ //
+ // BltVideo to BltVideo:
+ //
+ // Source is the Video Memory,
+ // Destination is the Video Memory
+
+ FrameBufferBase = (UINTN *)((UINTN)(This->Mode->FrameBufferBase));
+
+ // The UEFI spec currently states:
+ // "There is no limitation on the overlapping of the source and destination rectangles"
+ // Therefore, we must be careful to avoid overwriting the source data
+ if( SourceY == DestinationY ) {
+ // Copying within the same height, e.g. horizontal shift
+ if( SourceX == DestinationX ) {
+ // Nothing to do
+ Status = EFI_SUCCESS;
+ } else if( ((SourceX>DestinationX)?(SourceX - DestinationX):(DestinationX - SourceX)) < Width ) {
+ // There is overlap
+ Status = VideoCopyHorizontalOverlap (BitsPerPixel, FrameBufferBase, HorizontalResolution, SourceX, SourceY, DestinationX, DestinationY, Width, Height );
+ } else {
+ // No overlap
+ Status = VideoCopyNoHorizontalOverlap (BitsPerPixel, FrameBufferBase, HorizontalResolution, SourceX, SourceY, DestinationX, DestinationY, Width, Height );
+ }
+ } else {
+ // Copying from different heights
+ Status = VideoCopyNoHorizontalOverlap (BitsPerPixel, FrameBufferBase, HorizontalResolution, SourceX, SourceY, DestinationX, DestinationY, Width, Height );
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+LcdGraphicsBlt (
+ IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
+ IN OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
+ IN EFI_GRAPHICS_OUTPUT_BLT_OPERATION BltOperation,
+ IN UINTN SourceX,
+ IN UINTN SourceY,
+ IN UINTN DestinationX,
+ IN UINTN DestinationY,
+ IN UINTN Width,
+ IN UINTN Height,
+ IN UINTN Delta OPTIONAL // Number of BYTES in a row of the BltBuffer
+ )
+{
+ EFI_STATUS Status;
+ LCD_INSTANCE *Instance;
+
+ Instance = LCD_INSTANCE_FROM_GOP_THIS(This);
+
+ if (!mDisplayInitialized) {
+ InitializeDisplay (Instance);
+ }
+
+ switch (BltOperation) {
+ case EfiBltVideoFill:
+ Status = BltVideoFill (This, BltBuffer, SourceX, SourceY, DestinationX, DestinationY, Width, Height, Delta);
+ break;
+
+ case EfiBltVideoToBltBuffer:
+ Status = BltVideoToBltBuffer (This, BltBuffer, SourceX, SourceY, DestinationX, DestinationY, Width, Height, Delta);
+ break;
+
+ case EfiBltBufferToVideo:
+ Status = BltBufferToVideo (This, BltBuffer, SourceX, SourceY, DestinationX, DestinationY, Width, Height, Delta);
+ break;
+
+ case EfiBltVideoToVideo:
+ Status = BltVideoToVideo (This, BltBuffer, SourceX, SourceY, DestinationX, DestinationY, Width, Height, Delta);
+ break;
+
+ case EfiGraphicsOutputBltOperationMax:
+ default:
+ DEBUG((DEBUG_ERROR, "LcdGraphicsBlt: Invalid Operation\n"));
+ Status = EFI_INVALID_PARAMETER;
+ break;
+ }
+
+ return Status;
+}
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