OcPngLib.h File Reference

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Functions
EFI_STATUS	OcGetPngDims (IN VOID *Buffer, IN UINTN Size, OUT UINT32 *Width, OUT UINT32 *Height)
EFI_STATUS	OcDecodePng (IN VOID *Buffer, IN UINTN Size, OUT VOID **RawData, OUT UINT32 *Width, OUT UINT32 *Height, OUT BOOLEAN *HasAlphaType OPTIONAL)
EFI_STATUS	OcEncodePng (IN VOID *RawData, IN UINT32 Width, IN UINT32 Height, OUT VOID **Buffer, OUT UINTN *BufferSize)

Detailed Description

OcPngLib - library with PNG decoder functions

Copyright (c) 2018, savvas

All rights reserved.

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.

Definition in file OcPngLib.h.

Function Documentation

OcDecodePng()

EFI_STATUS OcDecodePng	(	IN VOID *	Buffer,
		IN UINTN	Size,
		OUT VOID **	RawData,
		OUT UINT32 *	Width,
		OUT UINT32 *	Height,
		OUT BOOLEAN *HasAlphaType	OPTIONAL )

Decodes PNG image into raw pixel buffer

Parameters

Buffer	Buffer with desired png image
Size	Size of input image
RawData	Output buffer with raw data
Width	Image width at output
Height	Image height at output
HasAlphaType	Returns 1 if alpha layer present, optional param Set NULL, if not used

Returns

EFI_SUCCESS The function completed successfully.

EFI_OUT_OF_RESOURCES There are not enough resources to init state.

EFI_INVALID_PARAMETER Passed wrong parameter

Definition at line 64 of file OcPng.c.

OcEncodePng()

EFI_STATUS OcEncodePng	(	IN VOID *	RawData,
		IN UINT32	Width,
		IN UINT32	Height,
		OUT VOID **	Buffer,
		OUT UINTN *	BufferSize )

Encodes raw pixel buffer into PNG image data

Parameters

RawData	RawData from png image
Width	Image width
Height	Image height
Buffer	Output buffer
BufferSize	Output size

Returns

EFI_SUCCESS The function completed successfully.

EFI_INVALID_PARAMETER Passed wrong parameter

Definition at line 118 of file OcPng.c.

OcGetPngDims()

EFI_STATUS OcGetPngDims	(	IN VOID *	Buffer,
		IN UINTN	Size,
		OUT UINT32 *	Width,
		OUT UINT32 *	Height )

Retrieves PNG image dimensions

Parameters

Buffer	Buffer with desired png image
Size	Size of input image
Width	Image width at output
Height	Image height at output

Returns

EFI_SUCCESS The function completed successfully.

EFI_OUT_OF_RESOURCES There are not enough resources to init state.

EFI_INVALID_PARAMETER Passed wrong parameter

Definition at line 25 of file OcPng.c.