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libtiff/test/raw_decode.c

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/* $Id: raw_decode.c,v 1.5 2012-12-20 18:08:07 tgl 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 min_red, int max_red,
int min_green, int max_green,
int min_blue, int max_blue,
unsigned char *buffer ) {
unsigned char *rgb = buffer + 3 * pixel;
if( rgb[0] >= min_red && rgb[0] <= max_red &&
rgb[1] >= min_green && rgb[1] <= max_green &&
rgb[2] >= min_blue && rgb[2] <= max_blue ) {
return 0;
}
fprintf( stderr, "Pixel %d did not match expected results.\n", pixel );
fprintf( stderr, "Got R=%d (expected %d..%d), G=%d (expected %d..%d), B=%d (expected %d..%d)\n",
rgb[0], min_red, max_red,
rgb[1], min_green, max_green,
rgb[2], min_blue, max_blue );
return 1;
}
static int check_rgba_pixel( int pixel,
int min_red, int max_red,
int min_green, int max_green,
int min_blue, int max_blue,
int min_alpha, int max_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) min_red &&
TIFFGetR(rgba) <= (uint32) max_red &&
TIFFGetG(rgba) >= (uint32) min_green &&
TIFFGetG(rgba) <= (uint32) max_green &&
TIFFGetB(rgba) >= (uint32) min_blue &&
TIFFGetB(rgba) <= (uint32) max_blue &&
TIFFGetA(rgba) >= (uint32) min_alpha &&
TIFFGetA(rgba) <= (uint32) max_alpha ) {
return 0;
}
fprintf( stderr, "Pixel %d did not match expected results.\n", pixel );
fprintf( stderr, "Got R=%d (expected %d..%d), G=%d (expected %d..%d), B=%d (expected %d..%d), A=%d (expected %d..%d)\n",
TIFFGetR(rgba), min_red, max_red,
TIFFGetG(rgba), min_green, max_green,
TIFFGetB(rgba), min_blue, max_blue,
TIFFGetA(rgba), min_alpha, max_alpha );
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;
}
/*
* JPEG decoding is inherently inexact, so we can't test for exact
* pixel values. (Well, if we knew exactly which libjpeg version
* we were using, and with what settings, we could expect specific
* values ... but it's not worth the trouble to keep track of.)
* Hence, use ranges of expected values. The ranges may need to be
* widened over time as more versions of libjpeg appear.
*/
pixel_status |= check_rgb_pixel( 0, 15, 18, 0, 0, 18, 41, buffer );
pixel_status |= check_rgb_pixel( 64, 0, 0, 0, 0, 0, 2, buffer );
pixel_status |= check_rgb_pixel( 512, 5, 6, 34, 36, 182, 196, buffer );
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.
*/
pixel_status |= check_rgba_pixel( 0, 15, 18, 0, 0, 18, 41, 255, 255,
rgba_buffer );
pixel_status |= check_rgba_pixel( 64, 0, 0, 0, 0, 0, 2, 255, 255,
rgba_buffer );
pixel_status |= check_rgba_pixel( 512, 5, 6, 34, 36, 182, 196, 255, 255,
rgba_buffer );
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:
*/
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