/* $Id: raw_decode.c,v 1.1 2012-06-01 21:04:22 fwarmerdam 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"
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, unsigned char *buffer ) {
/* RGBA images are upside down - adjust for normal ordering */
int adjusted_pixel = pixel % 128 + (127 - (pixel/128)) * 128;
unsigned char *rgba = buffer + 4 * adjusted_pixel;
if( rgba[0] == red && rgba[1] == green && rgba[2] == blue && rgba[3] == 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", rgba[0], rgba[1], rgba[2], rgba[3] );
return 1;
}
int
main(int argc, char **argv)
{
TIFF *tif;
static const char *srcfile = "images/quad-tile.jpg.tiff";
unsigned short h, v;
int status;
unsigned char *buffer;
tsize_t sz, szout;
(void) argc;
(void) argv;
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 (check_rgb_pixel( 0, 15, 0, 18, buffer )
|| check_rgb_pixel( 64, 0, 0, 2, buffer )
|| check_rgb_pixel( 512, 6, 36, 182, buffer ) ) {
exit(1);
}
free( buffer );
TIFFClose(tif);
/*
* Reopen and test reading using the RGBA interface.
*/
tif = TIFFOpen(srcfile,"r");
sz = 128 * 128 * 4;
buffer = (unsigned char *) malloc(sz);
if (!TIFFReadRGBATile( tif, 1*128, 2*128, (uint32 *) 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 (check_rgba_pixel( 0, 15, 0, 18, 255, buffer )
|| check_rgba_pixel( 64, 0, 0, 2, 255, buffer )
|| check_rgba_pixel( 512, 6, 36, 182, 255, buffer ) ) {
exit(1);
}
free( buffer );
TIFFClose(tif);
exit( 0 );
}
/* vim: set ts=8 sts=8 sw=8 noet: */