/* $Id$ */ /* ////////////////////////////////////////////////////////////////////////// // // // This code is Copyright (c) 2005 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 decode a scene from a JPEG 2000 file to a // (old-style) JPEG file, by constructing a pipeline consisting of a // J2KImageReader which feeds into a JpegImageWriter. #include "main.h" #include "support.h" #include "lt_fileSpec.h" #include "lti_scene.h" #include "J2KImageReader.h" #include "JpegImageWriter.h" LT_USE_NAMESPACE(LizardTech); LT_STATUS DecodeJP2ToJPG() { LT_STATUS sts = LT_STS_Uninit; // make the image reader const LTFileSpec fileSpec(INPUT_PATH("meg_cr20.jp2")); J2KImageReader *reader = J2KImageReader::create(); TEST_BOOL(reader != NULL); TEST_SUCCESS(reader->initialize(fileSpec)); // make the JPG writer JpegImageWriter writer; TEST_SUCCESS(writer.initialize(reader)); // set up the output file TEST_SUCCESS(writer.setOutputFileSpec(OUTPUT_PATH("meg_cr20_magP5.jpg"))); // we will decode the whole image at half resolution lt_uint32 w = 0, h = 0; TEST_SUCCESS(reader->getDimsAtMag(0.5, w, h)); const LTIScene scene(0, 0, w, h, 0.5); // write the scene to the file TEST_SUCCESS(writer.write(scene)); // verify we got the right output TEST_BOOL(Compare(OUTPUT_PATH("meg_cr20_magP5.jpg"), INPUT_PATH("meg_cr20_magP5.jpg"))); Remove(OUTPUT_PATH("meg_cr20_magP5.jpg")); reader->release(); reader = NULL; return LT_STS_Success; }
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