fix: bug in SetPages (#421)

Co-authored-by: qinghuan <[email protected]>
davidbyttow · Apr 16, 2024 · bb678ba · bb678ba
1 parent d2d2a1f
commit bb678ba
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Showing 2 changed files with 13 additions and 1 deletion.
diff --git a/vips/image.go b/vips/image.go
@@ -766,7 +766,7 @@ func (r *ImageRef) SetPages(pages int) error {
  return err
  }
 
- vipsSetImageNPages(r.image, pages)
+ vipsSetImageNPages(out, pages)
 
  r.setImage(out)
  return nil

diff --git a/vips/image_test.go b/vips/image_test.go
@@ -1169,6 +1169,18 @@ func TestImageRef_HistogramEntropy(t *testing.T) {
  require.True(t, e > 0)
 }
 
+func TestImageRef_SetPages(t *testing.T) {
+ Startup(nil)
+
+ image, err := NewImageFromFile(resources + "gif-animated.gif")
+ require.NoError(t, err)
+ require.Equal(t, 8, image.Pages())
+
+ err = image.SetPages(3)
+ require.NoError(t, err)
+ require.Equal(t, 3, image.Pages())
+}
+
 // TODO unit tests to cover:
 // NewImageFromReader failing test
 // NewImageFromFile failing test