Merge branch 'master' into new-dzsave-overlaps

.travis.yml

@@ -2,7 +2,6 @@ language: cpp
 
 before_script:
   - ./autogen.sh
-  - ./configure
     --disable-dependency-tracking
     --with-jpeg-includes=$JPEG/include
     --with-jpeg-libraries=$JPEG/lib

libvips/foreign/dzsave.c

@@ -1818,8 +1818,6 @@ vips_foreign_save_dz_build( VipsObject *object )
 	if( (p = (char *) vips__find_rightmost_brackets( dz->basename )) )
 		*p = '\0';
 	if( (p = strrchr( dz->basename, '.' )) ) {
-		*p = '\0';
-
 		/* If we're writing to thing.zip or thing.szi, default to zip 
 		 * container.
 		 */
@@ -1827,6 +1825,14 @@ vips_foreign_save_dz_build( VipsObject *object )
 			if( strcasecmp( p + 1, "zip" ) == 0 ||
 				strcasecmp( p + 1, "szi" ) == 0 ) 
 				dz->container = VIPS_FOREIGN_DZ_CONTAINER_ZIP;
+
+		/* Always remove .szi, .zip, .dz. We don't remove all suffixes
+		 * since we might be writing to a dirname with a dot in.
+		 */
+		if( strcasecmp( p + 1, "zip" ) == 0 ||
+			strcasecmp( p + 1, "szi" ) == 0 || 
+			strcasecmp( p + 1, "dz" ) == 0 )
+			*p = '\0';
 	}
 }
 
@@ -2053,7 +2059,7 @@ static int bandfmt_dz[10] = {
    UC, C,  US, S,  UI, I,  F,  F,  D,  D
 };
 
-const char *dz_suffs[] = { ".dz", NULL };
+static const char *dz_suffs[] = { ".dz", NULL };
 
 static void
 vips_foreign_save_dz_class_init( VipsForeignSaveDzClass *class )

libvips/foreign/jpeg.h

@@ -77,6 +77,8 @@ typedef struct {
 void vips__new_output_message( j_common_ptr cinfo );
 void vips__new_error_exit( j_common_ptr cinfo );
 
+int vips__set_exif_resolution( ExifData *ed, VipsImage *im );
+
 #ifdef __cplusplus
 }
 #endif /*__cplusplus*/

libvips/foreign/jpeg2vips.c

@@ -76,6 +76,9 @@
  * 	- switch to new orientation tag
  * 11/7/16
  * 	- new --fail handling
+ * 07/09/16
+ *      - Don't use the exif resolution if x_resolution / y_resolution /
+ *        resolution_unit is missing
  */
 
 /*
@@ -347,6 +350,27 @@ show_values( ExifData *data )
 #endif /*HAVE_EXIF*/
 
 #ifdef HAVE_EXIF
+/* Like exif_data_new_from_data(), but don't default missing fields. 
+ * 
+ * If we do exif_data_new_from_data(), then missing fields are set to 
+ * their default value and we won't know about it. 
+ */
+static ExifData *
+vips_exif_load_data_without_fix( void *data, int data_length )
+{
+	ExifData *ed;
+
+	if( !(ed = exif_data_new()) ) {
+		vips_error( "VipsJpeg", "%s", _( "unable to init exif" ) ); 
+		return( NULL );
+	}
+
+	exif_data_unset_option( ed, EXIF_DATA_OPTION_FOLLOW_SPECIFICATION );
+	exif_data_load_data( ed, data, data_length );
+
+	return( ed );
+}
+
 static int
 vips_exif_get_int( ExifData *ed, 
 	ExifEntry *entry, unsigned long component, int *out )
@@ -538,7 +562,7 @@ get_entry_int( ExifData *ed, int ifd, ExifTag tag, int *out )
 	return( vips_exif_get_int( ed, entry, 0, out ) );
 }
 
-static void
+static int
 res_from_exif( VipsImage *im, ExifData *ed )
 {
 	double xres, yres;
@@ -552,7 +576,7 @@ res_from_exif( VipsImage *im, ExifData *ed )
 		get_entry_int( ed, 0, EXIF_TAG_RESOLUTION_UNIT, &unit ) ) {
 		vips_warn( "VipsJpeg", 
 			"%s", _( "error reading resolution" ) );
-		return;
+		return( -1 );
 	}
 
 #ifdef DEBUG
@@ -589,7 +613,7 @@ res_from_exif( VipsImage *im, ExifData *ed )
 	default:
 		vips_warn( "VipsJpeg", 
 			"%s", _( "unknown EXIF resolution unit" ) );
-		return;
+		return( -1 );
 	}
 
 #ifdef DEBUG
@@ -599,6 +623,8 @@ res_from_exif( VipsImage *im, ExifData *ed )
 
 	im->Xres = xres;
 	im->Yres = yres;
+
+	return( 0 );
 }
 
 static int
@@ -626,7 +652,7 @@ parse_exif( VipsImage *im, void *data, int data_length )
 	ExifData *ed;
 	VipsExif ve;
 
-	if( !(ed = exif_data_new_from_data( data, data_length )) )
+	if( !(ed = vips_exif_load_data_without_fix( data, data_length )) )
 		return( -1 );
 
 #ifdef DEBUG_VERBOSE
@@ -634,27 +660,28 @@ parse_exif( VipsImage *im, void *data, int data_length )
 	show_values( ed );
 #endif /*DEBUG_VERBOSE*/
 
+	/* Look for resolution fields and use them to set the VIPS 
+	 * xres/yres fields.
+	 *
+	 * If the fields are missing, write the ones from jfif.
+	 */
+	if( res_from_exif( im, ed ) &&
+		vips__set_exif_resolution( ed, im ) )
+		return( -1 ); 
+
+	/* Make sure all required fields are there before we attach to vips
+	 * metadata.
+	 */
+	exif_data_fix( ed );
+
 	/* Attach informational fields for what we find.
-
-		FIXME ... better to have this in the UI layer?
-
-		Or we could attach non-human-readable tags here (int, 
-		double etc) and then move the human stuff to the UI 
-		layer?
-
 	 */
 	ve.image = im;
 	ve.ed = ed;
 	exif_data_foreach_content( ed, 
 		(ExifDataForeachContentFunc) attach_exif_content, &ve );
 
-	/* Look for resolution fields and use them to set the VIPS 
-	 * xres/yres fields.
-	 */
-	res_from_exif( im, ed );
-
 	attach_thumbnail( im, ed );
-
 	exif_data_free( ed );
 }
 #endif /*HAVE_EXIF*/

libvips/foreign/jpegsave.c

@@ -424,7 +424,7 @@ vips_foreign_save_jpeg_mime_init( VipsForeignSaveJpegMime *mime )
  * * @optimize_coding: %gboolean, compute optimal Huffman coding tables
  * * @interlace: %gboolean, write an interlaced (progressive) jpeg
  * * @strip: %gboolean, remove all metadata from image
- * * @no-subsample: %gboolean, disable chroma subsampling
+ * * @no_subsample: %gboolean, disable chroma subsampling
  * * @trellis_quant: %gboolean, apply trellis quantisation to each 8x8 block
  * * @overshoot_deringing: %gboolean, overshoot samples with extreme values
  * * @optimize_scans: %gboolean, split DCT coefficients into separate scans
@@ -453,7 +453,7 @@ vips_foreign_save_jpeg_mime_init( VipsForeignSaveJpegMime *mime )
  * If @strip is set, no EXIF data, IPCT data, ICC profile or XMP metadata is 
  * written into the output file. 
  *
- * If @no-subsample is set, chrominance subsampling is disabled. This will 
+ * If @no_subsample is set, chrominance subsampling is disabled. This will 
  * improve quality at the cost of larger file size. Useful for high Q factors. 
  *
  * If @trellis_quant is set and the version of libjpeg supports it
@@ -534,12 +534,12 @@ vips_jpegsave( VipsImage *in, const char *filename, ... )
  *
  * Optional arguments:
  *
- * * @Q: JPEG quality factor
+ * * @Q: %gint, quality factor
- * * @profile: attach this ICC profile
+ * * @profile: filename of ICC profile to attach
- * * @optimize_coding: compute optimal Huffman coding tables
+ * * @optimize_coding: %gboolean, compute optimal Huffman coding tables
- * * @interlace: write an interlaced (progressive) jpeg
+ * * @interlace: %gboolean, write an interlaced (progressive) jpeg
- * * @strip: remove all metadata from image
+ * * @strip: %gboolean, remove all metadata from image
- * * @no-subsample: disable chroma subsampling
+ * * @no_subsample: %gboolean, disable chroma subsampling
  * * @trellis_quant: %gboolean, apply trellis quantisation to each 8x8 block
  * * @overshoot_deringing: %gboolean, overshoot samples with extreme values
  * * @optimize_scans: %gboolean, split DCT coefficients into separate scans
@@ -590,11 +590,12 @@ vips_jpegsave_buffer( VipsImage *in, void **buf, size_t *len, ... )
  *
  * Optional arguments:
  *
- * * @Q: JPEG quality factor
+ * * @Q: %gint, quality factor
- * * @profile: attach this ICC profile
+ * * @profile: filename of ICC profile to attach
- * * @optimize_coding: compute optimal Huffman coding tables
+ * * @optimize_coding: %gboolean, compute optimal Huffman coding tables
- * * @strip: remove all metadata from image
+ * * @interlace: %gboolean, write an interlaced (progressive) jpeg
- * * @no-subsample: disable chroma subsampling
+ * * @strip: %gboolean, remove all metadata from image
+ * * @no_subsample: %gboolean, disable chroma subsampling
  * * @trellis_quant: %gboolean, apply trellis quantisation to each 8x8 block
  * * @overshoot_deringing: %gboolean, overshoot samples with extreme values
  * * @optimize_scans: %gboolean, split DCT coefficients into separate scans

libvips/foreign/vips2jpeg.c

@@ -273,29 +273,21 @@ vips_exif_set_int( ExifData *ed,
 static void
 vips_exif_double_to_rational( double value, ExifRational *rv )
 {
-	unsigned int scale;
+	/* We will usually set factors of 10, so use 1000 as the denominator
-
+	 * and it'll probably be OK.
-	/* We scale up to fill uint32, then set that as the
-	 * denominator. Try to avoid generating 0.
 	 */
-	scale = (unsigned int) ((UINT_MAX - 1000) / value);
+	rv->numerator = value * 1000;
-	scale = scale == 0 ? 1 : scale;
+	rv->denominator = 1000;
-	rv->numerator = value * scale;
-	rv->denominator = scale;
 }
 
 static void
 vips_exif_double_to_srational( double value, ExifSRational *srv )
 {
-	int scale;
+	/* We will usually set factors of 10, so use 1000 as the denominator
-
+	 * and it'll probably be OK.
-	/* We scale up to fill int32, then set that as the
-	 * denominator. Try to avoid generating 0.
 	 */
-	scale = (int) ((INT_MAX - 1000) / value);
+	srv->numerator = value * 1000;
-	scale = scale == 0 ? 1 : scale;
+	srv->denominator = 1000;
-	srv->numerator = value * scale;
-	srv->denominator = scale;
 }
 
 /* Parse a char* into an ExifRational. We allow floats as well.
@@ -461,15 +453,17 @@ write_tag( ExifData *ed, int ifd, ExifTag tag, write_fn fn, void *data )
 
 /* This is different, we set the xres/yres from the vips header rather than
  * from the exif tags on the image metadata.
+ *
+ * This is also called from the jpg reader to fix up bad exif resoltion.
  */
-static int
+int
-set_exif_resolution( ExifData *ed, VipsImage *im )
+vips__set_exif_resolution( ExifData *ed, VipsImage *im )
 {
 	double xres, yres;
 	const char *p;
 	int unit;
 
-	VIPS_DEBUG_MSG( "set_exif_resolution: vips res of %g, %g\n",
+	VIPS_DEBUG_MSG( "vips__set_exif_resolution: vips res of %g, %g\n",
 		im->Xres, im->Yres );
 
 	/* Default to inches, more progs support it.
@@ -823,7 +817,7 @@ write_exif( Write *write )
 
 	/* Update EXIF resolution from the vips image header.
 	 */
-	if( set_exif_resolution( ed, write->in ) ) {
+	if( vips__set_exif_resolution( ed, write->in ) ) {
 		exif_data_free( ed );
 		return( -1 );
 	}