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