rt_pixtype_compare_clamped_values()

rt_errorstate rt_pixtype_compare_clamped_values	(	rt_pixtype	pixtype,
		double	val,
		double	refval,
		int *	isequal
	)

Returns 1 if clamped values are equal, 0 if not equal, -1 if error.

Test to see if two values are equal when clamped.

Parameters

pixtype	: the pixel type to clamp the provided values
val	: value to compare to reference value
refval	: reference value to be compared with
isequal	: non-zero if clamped values are equal, 0 otherwise

Returns

ES_NONE on success, ES_ERROR on error

Definition at line 200 of file rt_pixel.c.

References ES_ERROR, ES_NONE, FLT_EQ, PT_16BSI, PT_16BUI, PT_1BB, PT_2BUI, PT_32BF, PT_32BSI, PT_32BUI, PT_4BUI, PT_64BF, PT_8BSI, PT_8BUI, rt_util_clamp_to_16BSI(), rt_util_clamp_to_16BUI(), rt_util_clamp_to_1BB(), rt_util_clamp_to_2BUI(), rt_util_clamp_to_32BSI(), rt_util_clamp_to_32BUI(), rt_util_clamp_to_32F(), rt_util_clamp_to_4BUI(), rt_util_clamp_to_8BSI(), rt_util_clamp_to_8BUI(), and rterror().

Referenced by rt_band_clamped_value_is_nodata(), rt_band_get_pixel_of_value(), and test_pixtype_compare_clamped_values().

  {
        assert(isequal != NULL);
        *isequal = 0;

        switch (pixtype) {
                case PT_1BB:
                        if (rt_util_clamp_to_1BB(val) == rt_util_clamp_to_1BB(refval))
                                *isequal = 1;
                        break;
                case PT_2BUI:
                        if (rt_util_clamp_to_2BUI(val) == rt_util_clamp_to_2BUI(refval))
                                *isequal = 1;
                        break;
                case PT_4BUI:
                        if (rt_util_clamp_to_4BUI(val) == rt_util_clamp_to_4BUI(refval))
                                *isequal = 1;
                        break;
                case PT_8BSI:
                        if (rt_util_clamp_to_8BSI(val) == rt_util_clamp_to_8BSI(refval))
                                *isequal = 1;
                        break;
                case PT_8BUI:
                        if (rt_util_clamp_to_8BUI(val) == rt_util_clamp_to_8BUI(refval))
                                *isequal = 1;
                        break;
                case PT_16BSI:
                        if (rt_util_clamp_to_16BSI(val) == rt_util_clamp_to_16BSI(refval))
                                *isequal = 1;
                        break;
                case PT_16BUI:
                        if (rt_util_clamp_to_16BUI(val) == rt_util_clamp_to_16BUI(refval))
                                *isequal = 1;
                        break;
                case PT_32BSI:
                        if (rt_util_clamp_to_32BSI(val) == rt_util_clamp_to_32BSI(refval))
                                *isequal = 1;
                        break;
                case PT_32BUI:
                        if (rt_util_clamp_to_32BUI(val) == rt_util_clamp_to_32BUI(refval))
                                *isequal = 1;
                        break;
                case PT_32BF:
                        if (FLT_EQ(rt_util_clamp_to_32F(val), rt_util_clamp_to_32F(refval)))
                                *isequal = 1;
                        break;
                case PT_64BF:
                        if (FLT_EQ(val, refval))
                                *isequal = 1;
                        break;
                default:
                        rterror("rt_pixtype_compare_clamped_values: Unknown pixeltype %d", pixtype);
                        return ES_ERROR;
        }

        return ES_NONE;
}

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