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VNC: Client may request pixel data in either big- or little- endian order

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This commit is contained in:
Gregory Nutt
2016-04-21 12:18:35 -06:00
parent 98e4de73e2
commit be1677ba25
4 changed files with 95 additions and 18 deletions
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include/nuttx/video/rfb.h
+42
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@@ -1131,6 +1131,48 @@ struct rfb_palettendx_s
((uint32_t)((s)[2]) << 8) | \
(uint32_t)((s)[3]))
/* There are also cases where the client may request pixel data in its
* little-endian format.
*/
/* void rfb_putle16(FAR uint8_t *dest, uint16_t value) */
#define rfb_putle16(d,v) \
do \
{ \
register FAR uint8_t *__d = (FAR uint8_t *)(d); \
*__d++ = ((uint16_t)(v) & 0xff); \
*__d = ((uint16_t)(v) >> 8); \
} \
while (0)
/* uin16_t rfb_getle16(FAR const uint8_t *src) */
#define rfb_getle16(s) \
(((uint16_t)((s)[1]) << 8) | \
(uint16_t)((s)[0]))
/* void rfb_putle32(FAR uint8_t *dest, uint32_t value) */
#define rfb_putle32(d,v) \
do \
{ \
register FAR uint8_t *__d = (FAR uint8_t *)(d); \
*__d++ = ((uint32_t)(v) & 0xff); \
*__d++ = ((uint32_t)(v) >> 8) & 0xff; \
*__d++ = ((uint32_t)(v) >> 16) & 0xff; \
*__d = ((uint32_t)(v) >> 24); \
} \
while (0)
/* uint32_t rfb_getle32(FAR const uint8_t *src) */
#define rfb_getle32(s) \
(((uint32_t)((s)[3]) << 24) | \
((uint32_t)((s)[2]) << 16) | \
((uint32_t)((s)[1]) << 8) | \
(uint32_t)((s)[0]))
/****************************************************************************
* Public Function Prototypes
****************************************************************************/