/**
Output pixels in "4 bit per pixel" format to an image.
This is a internal function.
@param Image Points to the image which will store the pixels.
@param Data Stores the value of output pixels, 0 ~ 15.
@param[in] PaletteInfo PaletteInfo which stores the color of the output
pixels. Each entry corresponds to a color within
[0, 15].
**/
VOID
Output4bitPixel (
IN OUT EFI_IMAGE_INPUT *Image,
IN UINT8 *Data,
IN EFI_HII_IMAGE_PALETTE_INFO *PaletteInfo
)
{
UINT16 Xpos;
UINT16 Ypos;
UINTN OffsetY;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BitMapPtr;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL PaletteValue[16];
EFI_HII_IMAGE_PALETTE_INFO *Palette;
UINT16 PaletteSize;
UINT16 PaletteNum;
UINT8 Byte;
ASSERT (Image != NULL && Data != NULL && PaletteInfo != NULL);
BitMapPtr = Image->Bitmap;
//
// The bitmap should allocate each color index starting from 0.
//
CopyMem (&PaletteSize, PaletteInfo, sizeof (UINT16));
PaletteSize += sizeof (UINT16);
Palette = AllocateZeroPool (PaletteSize);
ASSERT (Palette != NULL);
CopyMem (Palette, PaletteInfo, PaletteSize);
PaletteNum = (UINT16)(Palette->PaletteSize / sizeof (EFI_HII_RGB_PIXEL));
ZeroMem (PaletteValue, sizeof (PaletteValue));
CopyRgbToGopPixel (PaletteValue, Palette->PaletteValue, PaletteNum);
FreePool (Palette);
//
// Convert the pixel from 4 bit to corresponding color.
//
for (Ypos = 0; Ypos < Image->Height; Ypos++) {
OffsetY = BITMAP_LEN_4_BIT (Image->Width, Ypos);
//
// All bits in these bytes are meaningful
//
for (Xpos = 0; Xpos < Image->Width / 2; Xpos++) {
Byte = *(Data + OffsetY + Xpos);
BitMapPtr[Ypos * Image->Width + Xpos * 2] = PaletteValue[Byte >> 4];
BitMapPtr[Ypos * Image->Width + Xpos * 2 + 1] = PaletteValue[Byte & 0x0F];
}
if (Image->Width % 2 != 0) {
//
// Padding bits in this byte should be ignored.
//
Byte = *(Data + OffsetY + Xpos);
BitMapPtr[Ypos * Image->Width + Xpos * 2] = PaletteValue[Byte >> 4];
}
}
/**
Get the imageid of last image block: EFI_HII_IIBT_END_BLOCK when input
ImageId is zero, otherwise return the address of the
corresponding image block with identifier specified by ImageId.
This is a internal function.
@param ImageBlock Points to the beginning of a series of image blocks stored in order.
@param ImageId If input ImageId is 0, output the image id of the EFI_HII_IIBT_END_BLOCK;
else use this id to find its corresponding image block address.
@return The image block address when input ImageId is not zero; otherwise return NULL.
**/
UINT8*
GetImageIdOrAddress (
IN UINT8 *ImageBlock,
IN OUT EFI_IMAGE_ID *ImageId
)
{
EFI_IMAGE_ID ImageIdCurrent;
UINT8 *ImageBlockHdr;
UINT8 Length8;
UINT16 Length16;
UINT32 Length32;
EFI_HII_IIBT_IMAGE_1BIT_BLOCK Iibt1bit;
EFI_HII_IIBT_IMAGE_4BIT_BLOCK Iibt4bit;
EFI_HII_IIBT_IMAGE_8BIT_BLOCK Iibt8bit;
UINT16 Width;
UINT16 Height;
ASSERT (ImageBlock != NULL && ImageId != NULL);
ImageBlockHdr = ImageBlock;
ImageIdCurrent = 1;
while (((EFI_HII_IMAGE_BLOCK *) ImageBlock)->BlockType != EFI_HII_IIBT_END) {
if (*ImageId > 0) {
if (*ImageId == ImageIdCurrent) {
//
// If the found image block is a duplicate block, update the ImageId to
// find the previous defined image block.
//
if (((EFI_HII_IMAGE_BLOCK *) ImageBlock)->BlockType == EFI_HII_IIBT_DUPLICATE) {
CopyMem (ImageId, ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK), sizeof (EFI_IMAGE_ID));
ASSERT (*ImageId != ImageIdCurrent);
ImageBlock = ImageBlockHdr;
ImageIdCurrent = 1;
continue;
}
return ImageBlock;
}
if (*ImageId < ImageIdCurrent) {
//
// Can not find the specified image block in this image.
//
return NULL;
}
}
switch (((EFI_HII_IMAGE_BLOCK *) ImageBlock)->BlockType) {
case EFI_HII_IIBT_EXT1:
Length8 = *(UINT8*)((UINTN)ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK) + sizeof (UINT8));
ImageBlock += Length8;
break;
case EFI_HII_IIBT_EXT2:
CopyMem (
&Length16,
(UINT8*)((UINTN)ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK) + sizeof (UINT8)),
sizeof (UINT16)
);
ImageBlock += Length16;
break;
case EFI_HII_IIBT_EXT4:
CopyMem (
&Length32,
(UINT8*)((UINTN)ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK) + sizeof (UINT8)),
sizeof (UINT32)
);
ImageBlock += Length32;
break;
case EFI_HII_IIBT_IMAGE_1BIT:
case EFI_HII_IIBT_IMAGE_1BIT_TRANS:
CopyMem (&Iibt1bit, ImageBlock, sizeof (EFI_HII_IIBT_IMAGE_1BIT_BLOCK));
ImageBlock += sizeof (EFI_HII_IIBT_IMAGE_1BIT_BLOCK) - sizeof (UINT8) +
BITMAP_LEN_1_BIT (Iibt1bit.Bitmap.Width, Iibt1bit.Bitmap.Height);
ImageIdCurrent++;
break;
case EFI_HII_IIBT_IMAGE_4BIT:
case EFI_HII_IIBT_IMAGE_4BIT_TRANS:
CopyMem (&Iibt4bit, ImageBlock, sizeof (EFI_HII_IIBT_IMAGE_4BIT_BLOCK));
ImageBlock += sizeof (EFI_HII_IIBT_IMAGE_4BIT_BLOCK) - sizeof (UINT8) +
BITMAP_LEN_4_BIT (Iibt4bit.Bitmap.Width, Iibt4bit.Bitmap.Height);
ImageIdCurrent++;
break;
case EFI_HII_IIBT_IMAGE_8BIT:
case EFI_HII_IIBT_IMAGE_8BIT_TRANS:
CopyMem (&Iibt8bit, ImageBlock, sizeof (EFI_HII_IIBT_IMAGE_8BIT_BLOCK));
ImageBlock += sizeof (EFI_HII_IIBT_IMAGE_8BIT_BLOCK) - sizeof (UINT8) +
BITMAP_LEN_8_BIT (Iibt8bit.Bitmap.Width, Iibt8bit.Bitmap.Height);
ImageIdCurrent++;
break;
case EFI_HII_IIBT_IMAGE_24BIT:
case EFI_HII_IIBT_IMAGE_24BIT_TRANS:
CopyMem (&Width, ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK), sizeof (UINT16));
CopyMem (
&Height,
ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK) + sizeof (UINT16),
sizeof (UINT16)
);
ImageBlock += sizeof (EFI_HII_IIBT_IMAGE_24BIT_BLOCK) - sizeof (EFI_HII_RGB_PIXEL) +
BITMAP_LEN_24_BIT (Width, Height);
ImageIdCurrent++;
break;
case EFI_HII_IIBT_DUPLICATE:
ImageBlock += sizeof (EFI_HII_IIBT_DUPLICATE_BLOCK);
ImageIdCurrent++;
break;
case EFI_HII_IIBT_IMAGE_JPEG:
CopyMem (&Length32, ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK), sizeof (UINT32));
ImageBlock += Length32;
ImageIdCurrent++;
break;
case EFI_HII_IIBT_SKIP1:
Length8 = *(ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK));
ImageBlock += sizeof (EFI_HII_IIBT_SKIP1_BLOCK);
ImageIdCurrent = (UINT16) (ImageIdCurrent + Length8);
break;
case EFI_HII_IIBT_SKIP2:
CopyMem (&Length16, ImageBlock + sizeof (EFI_HII_IMAGE_BLOCK), sizeof (UINT16));
ImageBlock += sizeof (EFI_HII_IIBT_SKIP2_BLOCK);
ImageIdCurrent = (UINT16) (ImageIdCurrent + Length16);
break;
default:
//
// Unknown image blocks can not be skipped, processing halts.
//
ASSERT (FALSE);
}
}
//
// When ImageId is zero, return the imageid of last image block: EFI_HII_IIBT_END_BLOCK.
//
if (*ImageId == 0) {
*ImageId = ImageIdCurrent;
return ImageBlock;
}
return NULL;
}
