Kitty image input path.

regress/image-resize-height.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+# Height reduction discards image rows without leaving spans behind.
+
+PATH=/bin:/usr/bin
+TERM=screen
+export TERM
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+command -v python3 >/dev/null || exit 101
+
+python3 -B - "$TEST_TMUX" <<'PY'
+import sys
+from image_test import image_test, kitty, sixel
+from image_terminal import Terminal
+
+
+def snapshot(test, client, expected, sy):
+    """Check image pixels after a full redraw at the current height."""
+    test.redraw()
+    terminal = Terminal(sy=sy)
+    terminal.feed(client.data)
+    terminal.check(expected)
+
+
+red, green = (255, 0, 0), (0, 255, 0)
+for protocol in ('kitty', 'sixel'):
+    if protocol == 'kitty':
+        image = kitty('a=T,f=32,s=1,v=1,c=2,r=5,C=1', bytes((*red, 255)))
+        lower = kitty('a=T,f=32,s=1,v=1,c=2,r=1,C=1', bytes((*green, 255)))
+    else:
+        image = sixel(16, 80, [(100, 0, 0)], [0] * (16 * 80))
+        lower = sixel(16, 16, [(0, 100, 0)], [0] * (16 * 16))
+    for alternate in (False, True):
+        with image_test(sys.argv[1]) as test:
+            client = test.attach()
+            if alternate:
+                test.emit(b'\033[?1049h')
+            test.emit(b'\033[9;3H' + image + b'\033[14;3H' + lower +
+                b'\033[H')
+            expected = {(x, y): red for y in range(8 * 16, 13 * 16)
+                for x in range(16, 32)}
+            expected.update({(x, y): green for y in range(13 * 16, 14 * 16)
+                for x in range(16, 32)})
+            snapshot(test, client, expected, 16)
+
+            # One placement is clipped and the other is discarded entirely.
+            test.resize(client, 40, 10)
+            snapshot(test, client, {(x, y): red for y in range(8 * 16, 10 * 16)
+                for x in range(16, 32)}, 10)
+
+            # Discarded rows must not keep the remaining placement fixed.
+            test.emit(b'\033[8;10r\033[S\033[r')
+            snapshot(test, client, {(x, y): red for y in range(7 * 16, 9 * 16)
+                for x in range(16, 32)}, 10)
+PY