MrSID Decode SDK for Raster Reference Manual 9.5.4.4709

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Pipeline.cpp
/* $Id$ */
/* //////////////////////////////////////////////////////////////////////////
// //
// 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 example shows the use of a complex image pipeline: we will take an
// RGB image, convert it to greyscale, crop it, and write it out to disk.
// The input and output formats are both raw.
#include "main.h"
#include "support.h"
#include "lti_pixel.h"
#include "lti_scene.h"
#include "lti_rawImageReader.h"
#include "lti_colorTransformer.h"
#include "lti_cropFilter.h"
#include "lti_rawImageWriter.h"
LT_USE_NAMESPACE(LizardTech);
LT_STATUS Pipeline()
{
LT_STATUS sts = LT_STS_Uninit;
// make the raw image reader
const LTIPixel inputProps(LTI_COLORSPACE_RGB, 3, LTI_DATATYPE_UINT8);
LTIRawImageReader *reader = LTIRawImageReader::create();
TEST_BOOL(reader != NULL);
TEST_SUCCESS(reader->initialize(INPUT_PATH("meg.bip"), inputProps, 640, 480));
// make the RGB -> greyscale filter
LTIColorTransformer *colorFilter = LTIColorTransformer::create();
TEST_BOOL(colorFilter != NULL);
const LTIPixel grayPixel(LTI_COLORSPACE_GRAYSCALE, 1, reader->getDataType());
TEST_SUCCESS(colorFilter->initialize(reader, grayPixel));
// prove the color transform worked
TEST_BOOL(colorFilter->getColorSpace() == LTI_COLORSPACE_GRAYSCALE);
// crop it to remove the outer 20 pixels on each edge
LTICropFilter *cropFilter = LTICropFilter::create();
TEST_BOOL(cropFilter != NULL);
TEST_SUCCESS(cropFilter->initialize(colorFilter, 20, 20, 600, 440));
// prove the crop worked
TEST_BOOL(cropFilter->getWidth() == 600);
TEST_BOOL(cropFilter->getHeight() == 440);
// make the raw writer
LTIRawImageWriter writer;
TEST_SUCCESS(writer.initialize(cropFilter));
// set up the output file
TEST_SUCCESS(writer.setOutputFileSpec(OUTPUT_PATH("meg_filter.raw")));
// we will use the whole (cropped) image
const LTIScene scene(0, 0, 600, 440, 1.0);
// write the scene to the file
TEST_SUCCESS(writer.write(scene));
// verify we got the right output
TEST_BOOL(Compare(OUTPUT_PATH("meg_filter.raw"), INPUT_PATH("meg_filter.raw")));
Remove(OUTPUT_PATH("meg_filter.raw"));
cropFilter->release();
cropFilter = NULL;
colorFilter->release();
colorFilter = NULL;
reader->release();
reader = NULL;
return LT_STS_Success;
}

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