133 lines
5.9 KiB
C
133 lines
5.9 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.io/license.html
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*/
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/**
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* @file src/gdisp/gdisp_image_support.h
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* @brief GDISP image support routines header file.
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*
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* @defgroup Image Image
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* @ingroup GDISP
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* @{
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*/
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#ifndef _GDISP_IMAGE_SUPPORT_H
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#define _GDISP_IMAGE_SUPPORT_H
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/* Base endian handling routines */
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#define gdispImageGetVar(type, p, idx) (*(type *)(((gU8 *)(p))+(idx)))
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#define gdispImageGetByte(type, p, idx, shift) (((type)gdispImageGetVar(gU8, p, idx))<<(shift))
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#define gdispImageSwap16(w) ((((gU16)(w))>>8)|(((gU16)(w))<<8))
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#define gdispImageSwap32(dw) ((((gU32)(dw))>>24)|((((gU32)(dw))&0x00FF0000)>>8)\
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|((((gU32)(dw))&0x0000FF00)<<8)|(((gU32)(dw))<<24))
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#define gdispImageSwapWords32(dw) ((((gU32)(dw))>>16)|(((gU32)(dw))<<16))
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#define gdispImageSwapBytes32(dw) (((((gU32)(dw))&0xFF000000)>>8)|((((gU32)(dw))&0x00FF0000)<<8)\
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|((((gU32)(dw))&0x0000FF00)>>8)|(((gU32)(dw))<<8))
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/*
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* Get a gU16/gU32 from memory in the required endianness.
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* There is no alignment requirement.
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*/
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_LITTLE && GFX_CPU_NO_ALIGNMENT_FAULTS
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#define gdispImageGetLE16(p, idx) gdispImageGetVar(gU16, (p), (idx))
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#define gdispImageGetLE32(p, idx) gdispImageGetVar(gU32, (p), (idx))
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#else
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#define gdispImageGetLE16(p, idx) ( gdispImageGetByte(gU16, (p), (idx) , 0) | gdispImageGetByte(gU16, (p), (idx)+1, 8))
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#define gdispImageGetLE32(p, idx) ( gdispImageGetByte(gU32, (p), (idx) , 0) | gdispImageGetByte(gU32, (p), (idx)+1, 8)\
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|gdispImageGetByte(gU32, (p), (idx)+2, 16) | gdispImageGetByte(gU32, (p), (idx)+3, 24))
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#endif
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_BIG && GFX_CPU_NO_ALIGNMENT_FAULTS
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#define gdispImageGetBE16(p, idx) gdispImageGetVar(gU16, (p), (idx))
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#define gdispImageGetBE32(p, idx) gdispImageGetVar(gU32, (p), (idx))
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#else
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#define gdispImageGetBE16(p, idx) ( gdispImageGetByte(gU16, (p), (idx) , 8) | gdispImageGetByte(gU16, (p), (idx)+1, 0))
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#define gdispImageGetBE32(p, idx) ( gdispImageGetByte(gU32, (p), (idx) , 24) | gdispImageGetByte(gU32, (p), (idx)+1, 16)\
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|gdispImageGetByte(gU32, (p), (idx)+2, 8) | gdispImageGetByte(gU32, (p), (idx)+3, 0))
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#endif
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/*
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* Get a gU16/gU32 from memory in the required endianness.
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* These are optimised routines but the memory must be word/dword aligned.
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*/
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_LITTLE
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#define gdispImageGetAlignedLE16(p, idx) gdispImageGetVar(gU16, (p), (idx))
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#define gdispImageGetAlignedBE16(p, idx) gdispImageGetBE16(p, (idx))
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#define gdispImageGetAlignedLE32(p, idx) gdispImageGetVar(gU32, (p), (idx))
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#define gdispImageGetAlignedBE32(p, idx) gdispImageGetBE32(p, (idx))
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_BIG
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#define gdispImageGetAlignedLE16(p, idx) gdispImageGetLE16(p, (idx))
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#define gdispImageGetAlignedBE16(p, idx) gdispImageGetVar(gU16, (p), (idx))
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#define gdispImageGetAlignedLE32(p, idx) gdispImageGetLE32(p, (idx))
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#define gdispImageGetAlignedBE32(p, idx) gdispImageGetVar(gU32, (p), (idx))
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#else
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#define gdispImageGetAlignedLE16(p, idx) gdispImageGetLE16(p, (idx))
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#define gdispImageGetAlignedBE16(p, idx) gdispImageGetBE16(p, (idx))
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#define gdispImageGetAlignedLE32(p, idx) gdispImageGetLE32(p, (idx))
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#define gdispImageGetAlignedBE32(p, idx) gdispImageGetBE32(p, (idx))
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#endif
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/*
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* Change a uint16 or uint32 already in a register to the required endianness.
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*/
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_LITTLE
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#define gdispImageH16toLE16(w) (w)
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#define gdispImageH16toBE16(w) gdispImageSwap16(w)
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#define gdispImageH32toLE32(dw) (dw)
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#define gdispImageH32toBE32(dw) gdispImageSwap32(dw)
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#define gdispImageMakeLE16(w)
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#define gdispImageMakeBE16(w) { w = gdispImageH16toBE16(w); }
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#define gdispImageMakeLE32(dw)
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_BIG
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#define gdispImageH16toLE16(w) gdispImageSwap16(w)
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#define gdispImageH16toBE16(w) (w)
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#define gdispImageH32toLE32(dw) gdispImageSwap32(dw)
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#define gdispImageH32toBE32(dw) (dw)
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#define gdispImageMakeLE16(w) { w = gdispImageH16toLE16(w); }
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#define gdispImageMakeBE16(w)
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw)
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_WBDWL
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#define gdispImageH16toLE16(w) gdispImageSwap16(w)
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#define gdispImageH16toBE16(w) (w)
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#define gdispImageH32toLE32(dw) gdispImageSwapBytes32(dw)
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#define gdispImageH32toBE32(dw) gdispImageSwapWords32(dw)
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#define gdispImageMakeLE16(w) { w = gdispImageH16toLE16(w); }
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#define gdispImageMakeBE16(w)
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_WLDWB
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#define gdispImageH16toLE16(w) (w)
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#define gdispImageH16toBE16(w) gdispImageSwap16(w)
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#define gdispImageH32toLE32(dw) gdispImageSwapWords32(dw)
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#define gdispImageH32toBE32(dw) gdispImageSwapBytes32(dw)
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#define gdispImageMakeLE16(w)
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#define gdispImageMakeBE16(w) { w = gdispImageH16toBE16(w); }
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#else
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gU16 gdispImageH16toLE16(gU16 w);
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gU16 gdispImageH16toBE16(gU16 w);
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gU32 gdispImageH32toLE32(gU32 dw);
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gU32 gdispImageH32toBE32(gU32 dw);
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#define gdispImageMakeLE16(w) { w = gdispImageH16toLE16(w); }
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#define gdispImageMakeBE16(w) { w = gdispImageH16toBE16(w); }
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#endif
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void *gdispImageAlloc(gImage *img, gMemSize sz);
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void gdispImageFree(gImage *img, void *ptr, gMemSize sz);
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_UNKNOWN
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extern const gU8 gdispImageEndianArray[4];
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#endif
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#endif /* _GDISP_IMAGE_SUPPORT_H */
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/** @} */
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