コード例 #1
0
ファイル: raw_decode.c プロジェクト: mhernando/SDL2_image
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 );
}
コード例 #2
0
ファイル: raw_decode.c プロジェクト: hjmjohnson/vxl
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 = ".";
	}
        printf("XXXXXXXX %s",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 );
}