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Graphics protocol: Make it explicit what is supposed to happen when two images with the same z-index overlap

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Fixes #5187
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Kovid Goyal 2022-06-10 22:10:11 +05:30
parent 646bdbd002
commit e1ad75e932
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docs/graphics-protocol.rst
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@ -417,7 +417,9 @@ they are semi-transparent. You can specify z-index values using the ``z`` key.
Negative z-index values mean that the images will be drawn under the text. This
allows rendering of text on top of images. Negative z-index values below
INT32_MIN/2 (-1,073,741,824) will be drawn under cells with non-default background
colors.
colors. If two images with the same z-index overlap then the image with the
lower id is considered to have the lower z-index. If the images have the same
z-index and the same id, then the behavior is undefined.
.. note:: After placing an image on the screen the cursor must be moved to the
right by the number of cols in the image placement rectangle and down by the