From 88b6a396f1311fe3e6f2c883bea52890cbc43b9c Mon Sep 17 00:00:00 2001 From: James Zern Date: Tue, 25 Jan 2022 18:36:36 -0800 Subject: [PATCH] webp-container-spec.txt,cosmetics: normalize formatting - prefer Exif to EXIF when not referring to the chunk - normalize use of code format for canvas / frame width & height Change-Id: I7fc9e87baeb5d8e719274680ce621dcb078a985f --- doc/webp-container-spec.txt | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/doc/webp-container-spec.txt b/doc/webp-container-spec.txt index bd436fd4..ffa8940f 100644 --- a/doc/webp-container-spec.txt +++ b/doc/webp-container-spec.txt @@ -36,7 +36,7 @@ for: * **Lossless compression.** An image can be losslessly compressed, using the WebP Lossless Format. - * **Metadata.** An image may have metadata stored in EXIF or XMP formats. + * **Metadata.** An image may have metadata stored in Exif or XMP formats. * **Transparency.** An image may have transparency, i.e., an alpha channel. @@ -94,7 +94,7 @@ _1-based_ RIFF File Format ---------------- -The WebP file format is based on the RIFF (resource interchange file format) +The WebP file format is based on the RIFF (Resource Interchange File Format) document format. The basic element of a RIFF file is a _chunk_. It consists of: @@ -261,7 +261,7 @@ An extended format file consists of: * Image data. - * An optional 'EXIF' chunk with EXIF metadata. + * An optional 'EXIF' chunk with Exif metadata. * An optional 'XMP ' chunk with XMP metadata. @@ -317,9 +317,9 @@ Alpha (L): 1 bit : Set if any of the frames of the image contain transparency information ("alpha"). -EXIF metadata (E): 1 bit +Exif metadata (E): 1 bit -: Set if the file contains EXIF metadata. +: Set if the file contains Exif metadata. XMP metadata (X): 1 bit @@ -341,12 +341,12 @@ Reserved: 24 bits Canvas Width Minus One: 24 bits : _1-based_ width of the canvas in pixels. - The actual canvas width is '1 + Canvas Width Minus One' + The actual canvas width is `1 + Canvas Width Minus One`. Canvas Height Minus One: 24 bits : _1-based_ height of the canvas in pixels. - The actual canvas height is '1 + Canvas Height Minus One' + The actual canvas height is `1 + Canvas Height Minus One`. The product of _Canvas Width_ and _Canvas Height_ MUST be at most `2^32 - 1`. @@ -423,21 +423,21 @@ If the _Animation flag_ is not set, then this chunk SHOULD NOT be present. Frame X: 24 bits (_uint24_) -: The X coordinate of the upper left corner of the frame is `Frame X * 2` +: The X coordinate of the upper left corner of the frame is `Frame X * 2`. Frame Y: 24 bits (_uint24_) -: The Y coordinate of the upper left corner of the frame is `Frame Y * 2` +: The Y coordinate of the upper left corner of the frame is `Frame Y * 2`. Frame Width Minus One: 24 bits (_uint24_) : The _1-based_ width of the frame. - The frame width is `1 + Frame Width Minus One` + The frame width is `1 + Frame Width Minus One`. Frame Height Minus One: 24 bits (_uint24_) : The _1-based_ height of the frame. - The frame height is `1 + Frame Height Minus One` + The frame height is `1 + Frame Height Minus One`. Frame Duration: 24 bits (_uint24_) @@ -677,12 +677,12 @@ EXIF chunk: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ChunkHeader('EXIF') | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | EXIF Metadata | + | Exif Metadata | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -EXIF Metadata: _Chunk Size_ bytes +Exif Metadata: _Chunk Size_ bytes -: image metadata in EXIF format. +: image metadata in Exif format. XMP chunk: @@ -798,7 +798,7 @@ RIFF/WEBP +- XMP (metadata) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -An animated image with EXIF metadata may look as follows: +An animated image with Exif metadata may look as follows: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ RIFF/WEBP