77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
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/*
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* This confidential and proprietary software may be used only as
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* authorised by a licensing agreement from ARM Limited
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* (C) COPYRIGHT 2012 ARM Limited
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* ALL RIGHTS RESERVED
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* The entire notice above must be reproduced on all authorised
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* copies and copies may only be made to the extent permitted
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* by a licensing agreement from ARM Limited.
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*/
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#ifndef __ETC_Header_H__
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#define __ETC_Header_H__
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/**
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* \brief Class to extract information from the ETC headers of compressed textures.
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*/
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class ETCHeader
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{
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public:
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/**
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* \brief Extract the ETC header information from a loaded ETC compressed texture.
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*/
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ETCHeader(unsigned char *data);
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/**
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* \brief The width of the original texture.
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*
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* The width of a compressed texture is padded to 4x4 blocks by the compression method.
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* The resulting width of the compressed texture may therefore be larger if it's original width was not a multiple of 4.
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* By using the unpadded width, the original texture can be drawn.
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* \return The width of the original texture without padding.
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*/
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unsigned short getWidth(void);
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/**
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* \brief The height of the original texture.
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*
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* The height of a compressed texture is padded to 4x4 blocks by the compression method.
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* The resulting height of the compressed texture may therefore be larger if it's original height was not a multiple of 4.
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* By using the unpadded height, the original texture can be drawn.
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* \return The height of the original texture without padding.
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*/
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unsigned short getHeight(void);
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/**
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* \brief The width of the compressed texture with the padding added.
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*
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* The width of a compressed texture is padded to 4x4 blocks by the compression method.
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* The resulting width of the compressed texture may therefore be larger if it's original width was not a multiple of 4.
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* \return The width of the compressed texture with padding included.
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*/
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unsigned short getPaddedWidth(void);
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/**
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* \brief The height of the compressed texture with the padding added.
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*
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* The height of a compressed texture is padded to 4x4 blocks by the compression method.
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* The resulting height of the compressed texture may therefore be larger if it's original height was not a multiple of 4.
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* \return The height of the compressed texture with padding included.
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*/
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unsigned short getPaddedHeight(void);
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private:
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unsigned char paddedWidthMSB;
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unsigned char paddedWidthLSB;
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unsigned char paddedHeightMSB;
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unsigned char paddedHeightLSB;
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unsigned char widthMSB;
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unsigned char widthLSB;
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unsigned char heightMSB;
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unsigned char heightLSB;
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};
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#endif
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