Merge branch '8.5'

ChangeLog

@@ -14,6 +14,8 @@
 12/6/17 started 8.5.7
 - transform cmyk->rgb automatically on write if there's an embedded profile
   and the saver does not support cmyk
+- fix DPI mixup in svgload ... we were writing images about 20% too large,
+  thanks Fosk
 
 19/5/17 started 8.5.6
 - tiff read with start page > 0 could break edge tiles or strips

libvips/foreign/svgload.c

@@ -6,6 +6,8 @@
  * 	- add svgz support
  * 18/1/17
  * 	- invalidate operation on read error
+ * 8/7/17
+ * 	- fix DPI mixup, thanks Fosk
  */
 
 /*
@@ -107,21 +109,6 @@ vips_foreign_load_svg_dispose( GObject *gobject )
 		dispose( gobject );
 }
 
-static int
-vips_foreign_load_svg_build( VipsObject *object )
-{
-	VipsForeignLoadSvg *svg = (VipsForeignLoadSvg *) object;
-
-	if( !vips_object_argument_isset( object, "scale" ) )
-		svg->scale = svg->dpi / 72.0;
-
-	if( VIPS_OBJECT_CLASS( vips_foreign_load_svg_parent_class )->
-		build( object ) )
-		return( -1 );
-
-	return( 0 );
-}
-
 static VipsForeignFlags
 vips_foreign_load_svg_get_flags_filename( const char *filename )
 {
@@ -143,6 +130,7 @@ vips_foreign_load_svg_parse( VipsForeignLoadSvg *svg,
 	RsvgDimensionData dimensions;
 	double res;
 
+	rsvg_handle_set_dpi( svg->page, svg->dpi * svg->scale );
 	rsvg_handle_get_dimensions( svg->page, &dimensions ); 
 
 	/* We need pixels/mm for vips.
@@ -150,7 +138,7 @@ vips_foreign_load_svg_parse( VipsForeignLoadSvg *svg,
 	res = svg->dpi / 25.4;
 
 	vips_image_init_fields( out, 
-		dimensions.width * svg->scale, dimensions.height * svg->scale, 
+		dimensions.width, dimensions.height,
 		4, VIPS_FORMAT_UCHAR,
 		VIPS_CODING_NONE, VIPS_INTERPRETATION_sRGB, res, res );
 
@@ -194,9 +182,7 @@ vips_foreign_load_svg_generate( VipsRegion *or,
 	cr = cairo_create( surface );
 	cairo_surface_destroy( surface );
 
-	cairo_scale( cr, svg->scale, svg->scale );
+	cairo_translate( cr, -r->left, -r->top );
-	cairo_translate( cr, 
-		-r->left / svg->scale, -r->top / svg->scale );
 
 	/* rsvg is single-threaded, but we don't need to lock since we're
 	 * running inside a non-threaded tilecache.
@@ -272,7 +258,6 @@ vips_foreign_load_svg_class_init( VipsForeignLoadSvgClass *class )
 
 	object_class->nickname = "svgload";
 	object_class->description = _( "load SVG with rsvg" );
-	object_class->build = vips_foreign_load_svg_build;
 
 	load_class->get_flags_filename = 
 		vips_foreign_load_svg_get_flags_filename;
@@ -557,8 +542,8 @@ vips_foreign_load_svg_buffer_init( VipsForeignLoadSvgBuffer *buffer )
  * Render a SVG file into a VIPS image.  Rendering uses the librsvg library
  * and should be fast.
  *
- * Use @dpi to set the rendering resolution. The default is 72. Alternatively,
+ * Use @dpi to set the rendering resolution. The default is 72. You can also
- * you can scale the rendering from the default 1 point == 1 pixel by @scale.
+ * scale the rendering by @scale. 
  *
  * This function only reads the image header and does not render any pixel
  * data. Rendering occurs when pixels are accessed.

test/images/blankpage.svg

@@ -1,3 +1,58 @@
-<svg version="1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 595 842">
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-	<path stroke="#fff" fill="#fff" d="M0 0h595v842H0z"/>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1"
+   viewBox="0 0 793.70079 1122.5197"
+   id="svg4"
+   sodipodi:docname="blankpage.svg"
+   width="210mm"
+   height="297mm"
+   inkscape:version="0.92.1 r15371">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1052"
+     id="namedview6"
+     showgrid="false"
+     units="mm"
+     inkscape:document-units="mm"
+     inkscape:zoom="0.28028504"
+     inkscape:cx="308.20339"
+     inkscape:cy="421"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg4" />
+  <path
+     d="M 0,280.51969 H 595 V 1122.5197 H 0 Z"
+     id="path2"
+     inkscape:connector-curvature="0"
+     style="fill:#ffffff;stroke:#ffffff" />
 </svg>

test/test_foreign.py

@@ -595,9 +595,9 @@ class TestForeign(unittest.TestCase):
 
         def svg_valid(self, im):
             a = im(10, 10)
-            self.assertAlmostEqualObjects(a, [0, 0, 77, 255])
+            self.assertAlmostEqualObjects(a, [79, 79, 132, 255])
-            self.assertEqual(im.width, 360)
+            self.assertEqual(im.width, 288)
-            self.assertEqual(im.height, 588)
+            self.assertEqual(im.height, 470)
             self.assertEqual(im.bands, 4)
 
         self.file_loader("svgload", self.svg_file, svg_valid)

test/test_formats.sh

@@ -10,11 +10,11 @@ set -e
 
 # poppler / pdfload reference image
 poppler=$test_images/blankpage.pdf
-poppler_ref=$test_images/blankpage.png
+poppler_ref=$test_images/blankpage.pdf.png
 
 # rsvg / svgload reference image
 rsvg=$test_images/blankpage.svg
-rsvg_ref=$test_images/blankpage.png
+rsvg_ref=$test_images/blankpage.svg.png
 
 # giflib / gifload reference image
 giflib=$test_images/trans-x.gif
@@ -139,13 +139,14 @@ test_loader() {
 	ref=$1
 	in=$2
 	format=$3
+	thresh=$4
 
 	printf "testing $(basename $in) $format ... "
 
 	$vips copy $ref $tmp/before.v
 	$vips copy $in $tmp/after.v
 
-	test_difference $tmp/before.v $tmp/after.v 0
+	test_difference $tmp/before.v $tmp/after.v $thresh
 
 	echo "ok"
 }
@@ -230,19 +231,20 @@ test_raw $mono
 test_raw $image 
 
 if test_supported pdfload; then
-	test_loader $poppler_ref $poppler pdfload
+	test_loader $poppler_ref $poppler pdfload 0
 fi
 
 if test_supported svgload; then
-	test_loader $rsvg_ref $rsvg svgload
+	# librsvg can give small differences on some platforms
+	test_loader $rsvg_ref $rsvg svgload 10
 fi
 
 if test_supported gifload; then
-	test_loader $giflib_ref $giflib gifload
+	test_loader $giflib_ref $giflib gifload 0
 fi
 
 if test_supported matload; then
-	test_loader $matlab_ref $matlab matlab
+	test_loader $matlab_ref $matlab matlab 0
 fi
 
 if test_supported dzsave; then