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tests: Fix image writing on big endian

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The code tried to only write the RGB bytes of FORMAT_RGB24, however, the
in-memory layout is different on big-endian which would result in the
wrong bytes being written.

Fix this by simply also writing the byte we do not care about.
This commit is contained in:
Benjamin Berg
2019-12-04 13:21:11 +01:00
parent 1e2f19ea3d
commit ae285e790d
1 changed files with 3 additions and 1 deletions
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4
tests/capture.py
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@@ -36,10 +36,12 @@ c_buf = c_img.get_data()
for x in range(width):
for y in range(height):
# The upper byte is don't care, but the location depends on endianness,
# so just set all of them.
c_buf[y * c_rowstride + x * 4 + 0] = buf[y * width + x]
c_buf[y * c_rowstride + x * 4 + 1] = buf[y * width + x]
c_buf[y * c_rowstride + x * 4 + 2] = buf[y * width + x]
# Byte 4 is don't care
c_buf[y * c_rowstride + x * 4 + 3] = buf[y * width + x]
c_img.mark_dirty()
c_img.write_to_png(sys.argv[1])