Image regress tests.

regress/image-resize-many-placements.sh

@@ -0,0 +1,49 @@
+#!/bin/sh
+
+# Adapt the PR's many-placement recovery test to SIXEL: place images on
+# separate rows so they remain live, then recover every clipped column.
+
+PATH=/bin:/usr/bin
+TERM=screen
+export TERM
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+
+python3 -B - "$TEST_TMUX" <<'PY'
+import sys
+from image_test import image_test, sixel, check_image
+
+def check_rows(images, width):
+    """Each placement has two coloured halves; rows may use several rasters."""
+    row = x = 0
+    for image in images:
+        assert row < 64 and x + image[0] <= width, (row, x, image[:2])
+        expected = [rgb[(row + (xx >= 64)) % 3]
+            for xx in range(x, x + image[0])]
+        check_image(image, image[0], 1, expected)
+        x += image[0]
+        if x == width:
+            row += 1
+            x = 0
+    assert (row, x) == (64, 0), (row, x)
+
+
+palette = [(100, 0, 0), (0, 100, 0), (0, 0, 100)]
+rgb = [(255, 0, 0), (0, 255, 0), (0, 0, 255)]
+with image_test(sys.argv[1], sx=8, sy=80) as test:
+    client = test.attach()
+    wire = b''
+    for y in range(64):
+        wire += ('\033[%d;1H' % (y + 1)).encode()
+        wire += sixel(128, 1, palette,
+            [y % 3] * 64 + [(y + 1) % 3] * 64)
+    test.emit(wire)
+    test.redraw()
+    check_rows(client.images(), 64)
+
+    test.resize(client, 16, 80)
+    test.redraw()
+    check_rows(client.images(), 128)
+    test.redraw()
+    check_rows(client.images(), 128)
+
+PY