From a7e8a386d37d0c01106b7fa1343c957b51281887 Mon Sep 17 00:00:00 2001 From: Andrew Murray Date: Tue, 1 Mar 2022 15:44:12 +1100 Subject: [PATCH] Mention PsdImagePlugin as a plugin using multiple tiles --- docs/handbook/writing-your-own-image-plugin.rst | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/docs/handbook/writing-your-own-image-plugin.rst b/docs/handbook/writing-your-own-image-plugin.rst index 28e257be5..423e9c55c 100644 --- a/docs/handbook/writing-your-own-image-plugin.rst +++ b/docs/handbook/writing-your-own-image-plugin.rst @@ -123,8 +123,12 @@ The ``tile`` attribute To be able to read the file as well as just identifying it, the ``tile`` attribute must also be set. This attribute consists of a list of tile descriptors, where each descriptor specifies how data should be loaded to a -given region in the image. In most cases, only a single descriptor is used, -covering the full image. +given region in the image. + +In most cases, only a single descriptor is used, covering the full image. +:py:class:`.PsdImagePlugin.PsdImageFile` uses multiple tiles to combine +channels within a single layer, given that the channels are stored separately, +one after the other. The tile descriptor is a 4-tuple with the following contents::