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#define imcvtcolorEX(src, dst, sfmt, dfmt, nposX,nposY, ...) \    ({ \        IM_STATUS ret = IM_STATUS_SUCCESS; \        int args[] = {__VA_ARGS__}; \        int argc = sizeof(args)/sizeof(int); \        if (argc == 0) { \            ret = imcvtcolorEX_t(src, dst, sfmt, dfmt, nposX,nposY,IM_COLOR_SPACE_DEFAULT, 1); \        } else if (argc == 1){ \            ret = imcvtcolorEX_t(src, dst, sfmt, dfmt, nposX,nposY, args[0], 1); \        } else if (argc == 2){ \            ret = imcvtcolorEX_t(src, dst, sfmt, dfmt, nposX,nposY, args[0], args[1]); \        } else { \            ret = IM_STATUS_INVALID_PARAM; \            printf("invalid parameter\n"); \        } \        ret; \    })IM_API IM_STATUS imcvtcolorEX_t(rga_buffer_t src, rga_buffer_t dst, int sfmt, int dfmt, int nposX,int nposY, int mode, int sync);

IM_API IM_STATUS imcvtcolorEX_t(rga_buffer_t src, rga_buffer_t dst, int sfmt, int dfmt, int nposX,int nposY, int mode, int sync){    int usage = 0;    IM_STATUS ret = IM_STATUS_NOERROR;    rga_buffer_t pat;    im_rect srect;    im_rect drect;    im_rect prect;    empty_structure(NULL, NULL, &pat, &srect, &drect, &prect);    src.format = sfmt;    dst.format = dfmt;    dst.color_space_mode = mode;    if (sync == 0)        usage |= IM_SYNC;	srect.x = 0 ;    srect.y = 0;	srect.width = src.width ;    srect.height = src.height;    drect.x = nposX;    drect.y = nposY;    drect.width = dst.width;    drect.height = dst.height;    ret = improcess(src, dst, pat, srect, drect, prect, usage);    return ret;}

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