1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* 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.org/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 *)(((uint8_t *)(p))+(idx)))
#define gdispImageGetByte(type, p, idx, shift) (((type)gdispImageGetVar(uint8_t, p, idx))<<(shift))
#define gdispImageSwap16(w) ((((uint16_t)(w))>>8)|(((uint16_t)(w))<<8))
#define gdispImageSwap32(dw) ((((uint32_t)(w))>>24)|((((uint32_t)(w))&0x00FF0000)>>8)\
|((((uint32_t)(w))&0x0000FF00)<<8)|(((uint32_t)(w))<<24))
#define gdispImageSwapWords32(dw) ((((uint32_t)(w))>>16)|(((uint32_t)(w))<<16))
#define gdispImageSwapBytes32(dw) (((((uint32_t)(w))&0xFF000000)>>8)|((((uint32_t)(w))&0x00FF0000)<<8)\
|((((uint32_t)(w))&0x0000FF00)>>8)|(((uint32_t)(w))<<8))
/*
* Get a uint16_t/uint32_t 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(uint16_t, (p), (idx))
#define gdispImageGetLE32(p, idx) gdispImageGetVar(uint32_t, (p), (idx))
#else
#define gdispImageGetLE16(p, idx) ( gdispImageGetByte(uint16_t, (p), (idx) , 0) | gdispImageGetByte(uint16_t, (p), (idx)+1, 8))
#define gdispImageGetLE32(p, idx) ( gdispImageGetByte(uint32_t, (p), (idx) , 0) | gdispImageGetByte(uint32_t, (p), (idx)+1, 8)\
|gdispImageGetByte(uint32_t, (p), (idx)+2, 16) | gdispImageGetByte(uint32_t, (p), (idx)+3, 24))
#endif
#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_BIG && GFX_CPU_NO_ALIGNMENT_FAULTS
#define gdispImageGetBE16(p, idx) gdispImageGetVar(uint16_t, (p), (idx))
#define gdispImageGetBE32(p, idx) gdispImageGetVar(uint32_t, (p), (idx))
#else
#define gdispImageGetBE16(p, idx) ( gdispImageGetByte(uint16_t, (p), (idx) , 8) | gdispImageGetByte(uint16_t, (p), (idx)+1, 0))
#define gdispImageGetBE32(p, idx) ( gdispImageGetByte(uint32_t, (p), (idx) , 24) | gdispImageGetByte(uint32_t, (p), (idx)+1, 16)\
|gdispImageGetByte(uint32_t, (p), (idx)+2, 8) | gdispImageGetByte(uint32_t, (p), (idx)+3, 0))
#endif
/*
* Get a uint16_t/uint32_t 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(uint16_t, (p), (idx))
#define gdispImageGetAlignedBE16(p, idx) gdispImageGetBE16(p, (idx))
#define gdispImageGetAlignedLE32(p, idx) gdispImageGetVar(uint32_t, (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(uint16_t, (p), (idx))
#define gdispImageGetAlignedLE32(p, idx) gdispImageGetLE32(p, (idx))
#define gdispImageGetAlignedBE32(p, idx) gdispImageGetVar(uint32_t, (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
uint16_t gdispImageH16toLE16(uint16_t w);
uint16_t gdispImageH16toBE16(uint16_t w);
uint32_t gdispImageH32toLE32(uint32_t dw);
uint32_t gdispImageH32toBE32(uint32_t 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
#ifdef __cplusplus
extern "C" {
#endif
void *gdispImageAlloc(gdispImage *img, size_t sz);
void gdispImageFree(gdispImage *img, void *ptr, size_t sz);
#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_UNKNOWN
extern const uint8_t gdispImageEndianArray[4];
#endif
#ifdef __cplusplus
}
#endif
#endif /* _GDISP_IMAGE_SUPPORT_H */
/** @} */
|
