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/** @file
This library provides image decoding service by managing the different
image decoding libraries.
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that 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 <Uefi.h>
#include <Protocol/GraphicsOutput.h>
#include <Library/ImageDecoderLib.h>
#include <Library/BaseLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
typedef struct {
UINT32 Signature;
DECODE_IMAGE Decoder;
LIST_ENTRY Link;
} IMAGE_DECODER_ENTRY;
#define IMAGE_DECODER_ENTRY_SIGNATURE SIGNATURE_32 ('i', 'm', 'g', 'd')
#define IMAGE_DECODER_ENTRY_FROM_LINK(Link) \
CR (Link, IMAGE_DECODER_ENTRY, Link, IMAGE_DECODER_ENTRY_SIGNATURE)
LIST_ENTRY mImageDecoderLibDecoders = INITIALIZE_LIST_HEAD_VARIABLE (mImageDecoderLibDecoders);
/**
Convert a graphics image to a callee allocated GOP blt buffer.
@param ImageFormat Format of the image file.
@param Image Pointer to image file.
@param ImageSize Number of bytes in Image.
@param GopBlt Buffer containing GOP version of Image.
@param GopBltSize Size of GopBlt in bytes.
@param PixelWidth Width of GopBlt/Image in pixels.
@param PixelHeight Height of GopBlt/Image in pixels.
@retval EFI_SUCCESS GopBlt and GopBltSize are returned.
@retval EFI_INVALID_PARAMETER GopBlt or GopBltSize is NULL.
@retval EFI_INVALID_PARAMETER Image is NULL or ImageSize is 0.
@retval EFI_UNSUPPORTED Image is not supported.
@retval EFI_OUT_OF_RESOURCES No enough buffer to allocate.
**/
EFI_STATUS
EFIAPI
DecodeImage (
IN IMAGE_FORMAT ImageFormat,
IN UINT8 *Image,
IN UINTN ImageSize,
OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL **GopBlt,
OUT UINTN *GopBltSize,
OUT UINTN *PixelWidth,
OUT UINTN *PixelHeight
)
{
IMAGE_DECODER_ENTRY *Entry;
LIST_ENTRY *Link;
EFI_STATUS Status;
if ((GopBlt == NULL) || (GopBltSize == NULL)) {
return EFI_INVALID_PARAMETER;
}
if ((Image == NULL) || (ImageSize == 0)) {
return EFI_INVALID_PARAMETER;
}
for ( Link = GetFirstNode (&mImageDecoderLibDecoders)
; !IsNull (&mImageDecoderLibDecoders, Link)
; Link = GetNextNode (&mImageDecoderLibDecoders, Link)
) {
Entry = IMAGE_DECODER_ENTRY_FROM_LINK (Link);
Status = Entry->Decoder (ImageFormat, Image, ImageSize, GopBlt, GopBltSize, PixelWidth, PixelHeight);
if (!EFI_ERROR (Status)) {
break;
}
}
if (IsNull (&mImageDecoderLibDecoders, Link)) {
return EFI_UNSUPPORTED;
} else {
return EFI_SUCCESS;
}
}
/**
Register an image decoder.
@param Decoder An image decoder.
@retval EFI_SUCCESS The decoder was successfully registered.
@retval EFI_OUT_OF_RESOURCES No enough resource to register the decoder.
**/
EFI_STATUS
EFIAPI
RegisterImageDecoder (
IN DECODE_IMAGE Decoder
)
{
IMAGE_DECODER_ENTRY *Entry;
Entry = AllocatePool (sizeof (IMAGE_DECODER_ENTRY));
if (Entry == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Entry->Signature = IMAGE_DECODER_ENTRY_SIGNATURE;
Entry->Decoder = Decoder;
InsertTailList (&mImageDecoderLibDecoders, &Entry->Link);
return EFI_SUCCESS;
}
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