MrSID Decode SDK for Raster Reference Manual 9.5.4.4709

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UsingCInterface.c
/* $Id$ */
/* //////////////////////////////////////////////////////////////////////////
// //
// This code is Copyright (c) 2008 LizardTech, Inc, 1008 Western Avenue, //
// Suite 200, Seattle, WA 98104. Unauthorized use or distribution //
// prohibited. Access to and use of this code is permitted only under //
// license from LizardTech, Inc. Portions of the code are protected by //
// US and foreign patents and other filings. All Rights Reserved. //
// //
/* PUBLIC */
/*
* This demonstrates how to use the C API to decode a scene from a
* MrSID image.
*/
#include "main.h"
#include "support.h"
#include "ltic_api.h"
LT_STATUS UsingCInterface(void)
{
LT_STATUS sts = LT_STS_Uninit;
LTICImageH image = NULL;
lt_uint8 redBand[4];
lt_uint8 greenBand[4];
lt_uint8 blueBand[4];
void *bandData[3] = { redBand, greenBand, blueBand };
TEST_SUCCESS(ltic_openMrSIDImageFile(&image, INPUT_PATH("meg_cr20.sid")));
TEST_BOOL(ltic_getWidth(image) == 640);
TEST_BOOL(ltic_getHeight(image) == 480);
TEST_BOOL(ltic_getNumBands(image) == 3);
TEST_BOOL(ltic_getColorSpace(image) == LTI_COLORSPACE_RGB);
TEST_BOOL(ltic_getDataType(image) == LTI_DATATYPE_UINT8);
/* just read the upper-left 4 pixels */
TEST_SUCCESS(ltic_decode(image, 0, 0, 2, 2, 1.0, bandData));
TEST_BOOL(redBand[0] == 17);
TEST_BOOL(redBand[1] == 18);
TEST_BOOL(redBand[2] == 16);
TEST_BOOL(redBand[3] == 17);
TEST_BOOL(greenBand[0] == 29);
TEST_BOOL(greenBand[1] == 28);
TEST_BOOL(greenBand[2] == 26);
TEST_BOOL(greenBand[3] == 26);
TEST_BOOL(blueBand[0] == 20);
TEST_BOOL(blueBand[1] == 20);
TEST_BOOL(blueBand[2] == 18);
TEST_BOOL(blueBand[3] == 19);
TEST_SUCCESS(ltic_closeImage(image));
return LT_STS_Success;
}

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