From 5868b37fb7e9505c91a33460f9f78a90d5562787 Mon Sep 17 00:00:00 2001
From: David Manthey <david.manthey@kitware.com>
Date: Tue, 10 Sep 2024 19:51:14 -0400
Subject: [PATCH] Fix scaling small images in the multi source

PR #1627 fixed one problem and introduced another.  This fixes it.
---
 CHANGELOG.md                                  |  4 ++++
 .../large_image_source_multi/__init__.py      |  2 +-
 test/test_source_multi.py                     | 20 +++++++++----------
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6fa6718c2..e6645dcb2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## 1.29.9
+
+- Fix scaling small images in the multi source ([#1633](../../pull/1633))
+
 ## 1.29.8
 
 ### Improvements
diff --git a/sources/multi/large_image_source_multi/__init__.py b/sources/multi/large_image_source_multi/__init__.py
index a400d528d..199b9bb33 100644
--- a/sources/multi/large_image_source_multi/__init__.py
+++ b/sources/multi/large_image_source_multi/__init__.py
@@ -1119,8 +1119,8 @@ def _getTransformedTile(self, ts, transform, corners, scale, frame, crop=None):
         # Recompute where the source corners will land
         destcorners = (np.dot(transform, regioncorners.T).T).tolist()
         destShape = [
-            max(max(math.ceil(c[0]) for c in destcorners), srcImage.shape[1]),
             max(max(math.ceil(c[1]) for c in destcorners), srcImage.shape[0]),
+            max(max(math.ceil(c[0]) for c in destcorners), srcImage.shape[1]),
         ]
         if max(0, -x) or max(0, -y):
             transform[0][2] -= max(0, -x)
diff --git a/test/test_source_multi.py b/test/test_source_multi.py
index 3bbb4b708..fbf749035 100644
--- a/test/test_source_multi.py
+++ b/test/test_source_multi.py
@@ -274,13 +274,13 @@ def testMultiAffineTransform():
     source = large_image_source_multi.open(imagePath)
     frameval = [
         [243, 243, 49065],
-        [3924, 3924, 47676],
-        [13, 13, 49148],
-        [2592, 2592, 48093],
-        [235, 235, 49062],
-        [942, 942, 48785],
-        [1014, 1014, 48872],
-        [198, 198, 49063],
+        [3920, 3920, 47672],
+        [13, 13, 49149],
+        [3943, 3943, 47695],
+        [246, 246, 49063],
+        [972, 972, 48785],
+        [1455, 1455, 48597],
+        [204, 204, 49059],
     ]
     for frame in range(8):
         thumbs = {}
@@ -292,9 +292,9 @@ def testMultiAffineTransform():
             r = np.sum(img[:, :, 0] >= 128)
             g = np.sum(img[:, :, 1] >= 128)
             b = np.sum(img[:, :, 2] >= 128)
-            assert abs(r - frameval[frame][0]) < 250
-            assert abs(g - frameval[frame][1]) < 250
-            assert abs(b - frameval[frame][2]) < 250
+            assert abs(r - frameval[frame][0]) < 200
+            assert abs(g - frameval[frame][1]) < 200
+            assert abs(b - frameval[frame][2]) < 200
         assert abs(np.average(thumbs[2048] - thumbs[256])) < 7
         assert abs(np.average(thumbs[1024] - thumbs[256])) < 7
         assert abs(np.average(thumbs[512] - thumbs[256])) < 7