1 files changed, 274 insertions, 0 deletions
diff --git a/tiff/test/raw_decode.c b/tiff/test/raw_decode.c
new file mode 100755
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+++ b/tiff/test/raw_decode.c
@@ -0,0 +1,274 @@
+/* $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:
+ */