/* $Id: raw_decode.c,v 1.4 2012-07-06 17:05:16 bfriesen Exp $ */

/*

* Copyright (c) 2012, Frank Warmerdam <warmerdam@pobox.com>

*

* Permission to use, copy, modify, distribute, and sell this software and

* its documentation for any purpose is hereby granted without fee, provided

* that (i) the above copyright notices and this permission notice appear in

* all copies of the software and related documentation, and (ii) the names of

* Sam Leffler and Silicon Graphics may not be used in any advertising or

* publicity relating to the software without the specific, prior written

* permission of Sam Leffler and Silicon Graphics.

*

* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,

* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY

* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

*

* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR

* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,

* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF

* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE

* OF THIS SOFTWARE.

*/

/*

* TIFF Library

*

* The objective of this test suite is to test the JPEGRawDecode()

* interface via TIFReadEncodedTile(). This function with YCbCr subsampling

* is a frequent source of bugs.

*/

#include "tif_config.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#ifdef HAVE_UNISTD_H

# include <unistd.h>

#endif

#include "tiffio.h"

#include "jpeglib.h" /* Needed for JPEG_LIB_VERSION */

static unsigned char cluster_0[] = { 0, 0, 2, 0, 138, 139 };

static unsigned char cluster_64[] = { 0, 0, 9, 6, 134, 119 };

static unsigned char cluster_128[] = { 44, 40, 63, 59, 230, 95 };

static int check_cluster( int cluster, unsigned char *buffer, unsigned char *expected_cluster ) {

unsigned char *target = buffer + cluster*6;

if (memcmp(target, expected_cluster, 6) == 0) {

return 0;

}

fprintf( stderr, "Cluster %d did not match expected results.\n", cluster );

fprintf( stderr,

"Expect: %3d %3d %3d %3d\n"

" %3d %3d\n",

expected_cluster[0], expected_cluster[1],

expected_cluster[4], expected_cluster[5],

expected_cluster[2], expected_cluster[3] );

fprintf( stderr,

" Got: %3d %3d %3d %3d\n"

" %3d %3d\n",

target[0], target[1],

target[4], target[5],

target[2], target[3] );

return 1;

}

static int check_rgb_pixel( int pixel, int red, int green, int blue, unsigned char *buffer ) {

unsigned char *rgb = buffer + 3 * pixel;

if( rgb[0] == red && rgb[1] == green && rgb[2] == blue ) {

return 0;

}

fprintf( stderr, "Pixel %d did not match expected results.\n", pixel );

fprintf( stderr, "Expect: %3d %3d %3d\n", red, green, blue );

fprintf( stderr, " Got: %3d %3d %3d\n", rgb[0], rgb[1], rgb[2] );

return 1;

}

static int check_rgba_pixel( int pixel, int red, int green, int blue, int alpha, uint32 *buffer ) {

/* RGBA images are upside down - adjust for normal ordering */

int adjusted_pixel = pixel % 128 + (127 - (pixel/128)) * 128;

uint32 rgba = buffer[adjusted_pixel];

if( TIFFGetR(rgba) == (uint32) red && TIFFGetG(rgba) == (uint32) green &&

TIFFGetB(rgba) == (uint32) blue && TIFFGetA(rgba) == (uint32) alpha ) {

return 0;

}

fprintf( stderr, "Pixel %d did not match expected results.\n", pixel );

fprintf( stderr, "Expect: %3d %3d %3d %3d\n", red, green, blue, alpha );

fprintf( stderr, " Got: %3d %3d %3d %3d\n",

TIFFGetR(rgba), TIFFGetG(rgba), TIFFGetB(rgba), TIFFGetA(rgba) );

return 1;

}

int

main(int argc, char **argv)

{

TIFF *tif;

static const char *srcfilerel = "images/quad-tile.jpg.tiff";

char *srcdir = NULL;

char srcfile[1024];

unsigned short h, v;

int status;

unsigned char *buffer;

uint32 *rgba_buffer;

tsize_t sz, szout;

unsigned int pixel_status = 0;

(void) argc;

(void) argv;

if ((srcdir = getenv("srcdir")) == NULL) {

srcdir = ".";

}

if ((strlen(srcdir) + 1 + strlen(srcfilerel)) >= sizeof(srcfile)) {

fprintf( stderr, "srcdir too long %s\n", srcdir);

exit( 1 );

}

strcpy(srcfile,srcdir);

strcat(srcfile,"/");

strcat(srcfile,srcfilerel);

tif = TIFFOpen(srcfile,"r");

if ( tif == NULL ) {

fprintf( stderr, "Could not open %s\n", srcfile);

exit( 1 );

}

status = TIFFGetField(tif,TIFFTAG_YCBCRSUBSAMPLING, &h, &v);

if ( status == 0 || h != 2 || v != 2) {

fprintf( stderr, "Could not retrieve subsampling tag.\n" );

exit(1);

}

/*

* What is the appropriate size of a YCbCr encoded tile?

*/

sz = TIFFTileSize(tif);

if( sz != 24576) {

fprintf(stderr, "tiles are %d bytes\n", (int)sz);

exit(1);

}

buffer = (unsigned char *) malloc(sz);

/*

* Read a tile in decompressed form, but still YCbCr subsampled.

*/

szout = TIFFReadEncodedTile(tif,9,buffer,sz);

if (szout != sz) {

fprintf( stderr,

"Did not get expected result code from TIFFReadEncodedTile()(%d instead of %d)\n",

(int) szout, (int) sz );

return 1;

}

if( check_cluster( 0, buffer, cluster_0 )

|| check_cluster( 64, buffer, cluster_64 )

|| check_cluster( 128, buffer, cluster_128 ) ) {

exit(1);

}

free(buffer);

/*

* Read a tile using the built-in conversion to RGB format provided by the JPEG library.

*/

TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB);

sz = TIFFTileSize(tif);

if( sz != 128*128*3) {

fprintf(stderr, "tiles are %d bytes\n", (int)sz);

exit(1);

}

buffer = (unsigned char *) malloc(sz);

szout = TIFFReadEncodedTile(tif,9,buffer,sz);

if (szout != sz) {

fprintf( stderr,

"Did not get expected result code from TIFFReadEncodedTile()(%d instead of %d)\n",

(int) szout, (int) sz );

return 1;

}

#if JPEG_LIB_VERSION >= 70

pixel_status |= check_rgb_pixel( 0, 18, 0, 41, buffer );

pixel_status |= check_rgb_pixel( 64, 0, 0, 0, buffer );

pixel_status |= check_rgb_pixel( 512, 5, 34, 196, buffer );

#else

pixel_status |= check_rgb_pixel( 0, 15, 0, 18, buffer );

pixel_status |= check_rgb_pixel( 64, 0, 0, 2, buffer );

pixel_status |= check_rgb_pixel( 512, 6, 36, 182, buffer );

#endif

free( buffer );

TIFFClose(tif);

/*

* Reopen and test reading using the RGBA interface.

*/

tif = TIFFOpen(srcfile,"r");

sz = 128 * 128 * sizeof(uint32);

rgba_buffer = (uint32 *) malloc(sz);

if (!TIFFReadRGBATile( tif, 1*128, 2*128, rgba_buffer )) {

fprintf( stderr, "TIFFReadRGBATile() returned failure code.\n" );

return 1;

}

/*

* Currently TIFFReadRGBATile() just uses JPEGCOLORMODE_RGB so this

* trivally matches the last results. Eventually we should actually

* accomplish it from the YCbCr subsampled buffer ourselves in which

* case the results may be subtly different but similar.

*/

#if JPEG_LIB_VERSION >= 70

pixel_status |= check_rgba_pixel( 0, 18, 0, 41, 255, rgba_buffer );

pixel_status |= check_rgba_pixel( 64, 0, 0, 0, 255, rgba_buffer );

pixel_status |= check_rgba_pixel( 512, 5, 34, 196, 255, rgba_buffer );

#else

pixel_status |= check_rgba_pixel( 0, 15, 0, 18, 255, rgba_buffer );

pixel_status |= check_rgba_pixel( 64, 0, 0, 2, 255, rgba_buffer );

pixel_status |= check_rgba_pixel( 512, 6, 36, 182, 255, rgba_buffer );

#endif

free( rgba_buffer );

TIFFClose(tif);

if (pixel_status) {

exit(1);

}

exit( 0 );

}

/* vim: set ts=8 sts=8 sw=8 noet: */

/*

* Local Variables:

* mode: c

* c-basic-offset: 8

* fill-column: 78

* End:

*/