[gimp-help] Update curves.xml
- From: Julien Hardlin <jhardlin src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gimp-help] Update curves.xml
- Date: Thu, 4 Jul 2019 15:33:30 +0000 (UTC)
commit 5c673d905cdc101d625b93a9ec87268e56526b30
Author: Julien Hardelin <jhardlin orange fr>
Date: Thu Jul 4 17:32:51 2019 +0200
Update curves.xml
images/C/menus/colors/curves-dialog.png | Bin 30947 -> 37926 bytes
src/menus/colors/auto/stretch-contrast.xml | 6 +-
src/menus/colors/curves.xml | 215 +++++++++++++++--------------
src/toolbox/selection/foreground.xml | 6 +-
4 files changed, 118 insertions(+), 109 deletions(-)
---
diff --git a/images/C/menus/colors/curves-dialog.png b/images/C/menus/colors/curves-dialog.png
index b3adab1bf..6d1dc84e6 100644
Binary files a/images/C/menus/colors/curves-dialog.png and b/images/C/menus/colors/curves-dialog.png differ
diff --git a/src/menus/colors/auto/stretch-contrast.xml b/src/menus/colors/auto/stretch-contrast.xml
index 4d2833667..a15d8a247 100644
--- a/src/menus/colors/auto/stretch-contrast.xml
+++ b/src/menus/colors/auto/stretch-contrast.xml
@@ -30,11 +30,7 @@
them to stretch the Red, Green and Blue histograms to the full contrast
range. The bright colors become brighter and the dark colors become
darker, which increases the contrast.
- This command produces a somewhat similar effect to the
- <link linkend="plug-in-normalize">Normalize</link> command, except that
- it works on each color channel of the layer individually. This usually
- leads to color shifts in the image, so it may not produce the desired
- result. <quote>Stretch Contrast</quote> works on layers of RGB,
+ <quote>Stretch Contrast</quote> works on layers of RGB,
Grayscale and Indexed images. Use <quote>Stretch Contrast</quote> only
if you want to remove an undesirable color tint from an image which
should contain pure white and pure black.
diff --git a/src/menus/colors/curves.xml b/src/menus/colors/curves.xml
index 62725dfea..85510b283 100644
--- a/src/menus/colors/curves.xml
+++ b/src/menus/colors/curves.xml
@@ -2,9 +2,7 @@
<!DOCTYPE sect2 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
"http://www.docbook.org/xml/4.3/docbookx.dtd";>
<!-- section history:
- 2018-06-20 j.h small updates to v2.10.2
- 2009-03-11 Added Presets
- 2007-05-20 lexa: enhanced docbook compliance
+ 2019-07-03 j.h: update to v2.10.12
-->
<sect2 id="gimp-tool-curves">
<title>Curves</title>
@@ -64,11 +62,11 @@
</figure>
<variablelist>
<varlistentry>
- <term>Presets</term>
+ <term><guilabel>Presets</guilabel>, <guilabel>Preview</guilabel>,
+ <guilabel>Split view</guilabel></term>
<listitem>
<para>
- <quote>Presets</quote> are a common feature for
- several Colors command. You can find its description in
+ These options are common to GEGL-based filters. Please refer to
<xref linkend="gimp-colors-introduction"/>.
</para>
</listitem>
@@ -151,81 +149,140 @@
<itemizedlist>
<listitem>
<para>
- <emphasis>The horizontal gradient</emphasis>: it represents
- the input tonal scale. It, too, ranges from 0 (black) to 255
- (white), from Shadows to Highlights. When you
- adjust the curve, it splits up into two parts; the upper part
- then represents the <emphasis>tonal balance</emphasis> of the
- layer or selection.
+ <emphasis role="bold">The horizontal gradient</emphasis>: it
+ represents the <emphasis>input</emphasis> tonal scale. It,
+ too, ranges from 0 (black) to 255 (white), from Shadows to
+ Highlights. When you adjust the curve, it splits up into two
+ parts; the upper part then represents the <emphasis>tonal
+ balance</emphasis> of the layer or selection.
</para>
</listitem>
<listitem>
<para>
- <emphasis>The vertical gradient</emphasis>: it represents the
- destination, the output tonal scale. It ranges from 0 (black)
- to 255 (white), from Shadows to Highlights.
+ <emphasis role="bold">The vertical gradient</emphasis>: it
+ represents the destination, the <emphasis>output</emphasis>
+ tonal scale. It ranges from 0 (black) to 255 (white), from
+ Shadows to Highlights.
</para>
</listitem>
<listitem>
<para>
- <emphasis>The chart</emphasis>: the curve is drawn on a grid
- and goes from the bottom left corner to the top right corner.
- The pointer x/y position is permanently displayed in the top
- left part of the grid. By default, this curve is straight,
- because every input level corresponds to the same
- output tone. GIMP automatically places an anchor at both
- ends of the curve, for black (0) and white (255).
+ <emphasis role="bold">The chart</emphasis>: the curve is drawn
+ on a grid and goes from the bottom left corner to the top right
+ corner. The <emphasis>pointer x/y position</emphasis> is
+ permanently displayed in the top left part of the grid. By
+ default, this curve is straight, because every input level
+ corresponds to the same output tone. GIMP automatically places a
+ point at both ends of the curve, for black (0) and white (255).
</para>
<para>
- If you click on the curve, a new <emphasis>anchor</emphasis>
- is created. When the mouse pointer goes over an anchor, it
- takes the form of a small hand. You can
- click-and-drag the anchor to bend the curve. If you click
- outside of the curve, an anchor is also created, and the
- curve includes it automatically.
+ If you click on the curve, a new <emphasis>point</emphasis>
+ is created. When the mouse pointer goes over a point, it
+ takes the form of a small hand. You can click-and-drag the
+ point to bend the curve.
</para>
<para>
- Unactive anchors are black. The active anchor is white. You
- can activate an anchor by clicking on it. You can also swap
- the anchor activation by using the Left and Right arrow keys
- of your keyboard. You can move the anchor vertically with the
- Up and Down arrow keys. This allows you to fine tune the
- anchor position. Holding the <keycap>Shift</keycap> down lets
- you move it by increments of 15 pixels.
+ If you click outside the curve, a point is also created, and
+ the curve includes it automatically. <emphasis role="underline">
+ If you <keycap>Ctrl</keycap>-click outside the curve, the
+ Y-coordinate will snap to the original curve</emphasis>: this
+ is particularly useful for adding points along the curve.
</para>
<para>
- Two anchors define a <emphasis>curve segment</emphasis> which
+ Unactive points are white. The active point is black. You
+ can activate a point by clicking on it. You can also swap
+ the point activation by using the Left and Right arrow keys
+ of your keyboard.
+ </para>
+ <para>
+ Two points define a <emphasis>curve segment</emphasis> which
represents a tonal range in the layer. You can click-and-drag
- this segment (this creates a new anchor). Of course, you
- can't drag it beyond the end anchors.
+ this segment (this creates a new point). Of course, you
+ can't drag it beyond the end points.
+ </para>
+ <para>
+ To <emphasis>move a point</emphasis>, several possibilities
+ to fine tune the point position. :
+ <itemizedlist>
+ <listitem>
+ <para>
+ Click-and-drag the point.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Using Up and Down arrow keys (Holding the
+ <keycap>Shift</keycap> down lets you move it by
+ increments of 15 pixels) to move the point vertically.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ <emphasis role="underline"><keycap>Ctrl</keycap> +
+ click-and-drag allows you to move the point along the
+ curve in its segment, independently of the pointer
+ position.</emphasis>
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Another way to move point is using the
+ <quote>Input</quote> and <quote>Output</quote> spin
+ buttons, new in GIMP-2.10.12: see below.
+ </para>
+ </listitem>
+ </itemizedlist>
</para>
<para>
- To delete all anchors (apart from both ends), click on the
- <guilabel>Reset Channel</guilabel> button. To delete only one
- anchor, move beyond any adjacent anchor on horizontal axis.
+ To <emphasis>delete</emphasis> all points (apart from both ends
+ that can't be deleted), click on the <guibutton>Reset
+ Channel</guibutton> button. To delete only one point, move it
+ beyond any adjacent point horizontally.
</para>
<para>
Meanwhile, on the canvas, the mouse pointer has the form of
an eye-dropper. If you click on a pixel, a vertical line
appears on the chart, positioned to the source value of this
pixel in the selected channel. If you
- <keycap>Shift</keycap>-click, you create an anchor in the
+ <keycap>Shift</keycap>-click, you create a point in the
selected channel. If you <keycap>Ctrl</keycap>-click, you
- create an anchor in all channels, possibly including the
+ create a point in all channels, possibly including the
Alpha channel. You can also <keycap>Shift</keycap>-drag and
- <keycap>Ctrl</keycap>-drag: this
- will move the vertical line and the anchor will show up when
- releasing the mouse left button.
+ <keycap>Ctrl</keycap>-drag: this will move the vertical line
+ and the point will show up when releasing the mouse left
+ button.
</para>
<para>
- The histogram of the active layer or selection for the
- selected channel is represented grayed out in the chart. It's
- only a reference.
+ The <emphasis>histogram</emphasis> of the active layer or
+ selection for the selected channel is represented grayed out in
+ the chart. It's only a reference and is not updated during
+ treatment.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term>Input, Output</term>
+ <listitem>
+ <para>
+ These spin buttons allow setting the selected point coordinates
+ numerically and accurately if needed.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Type</term>
+ <listitem>
+ <para>
+ Control points can be either <guilabel>Smooth</guilabel> (default:
+ all points are smooth) or <guilabel>Corner</guilabel> points. These
+ Corner points result in sharp angle. They are displayed using a
+ diamond shape. You can toggle between Smooth and Corner for the
+ selected point.
+ </para>
+ </listitem>
+ </varlistentry>
<varlistentry>
<term>Curve type</term>
<listitem>
@@ -234,9 +291,8 @@
<term>Smooth</term>
<listitem>
<para>
- This the default mode. It constrains the curve type to a
- smooth line with tension. It provides a more realistic
- render than the following.
+ This Smooth option concerns the whole curve, not only the
+ selected point as above.
</para>
</listitem>
</varlistentry>
@@ -244,67 +300,26 @@
<term>Free Hand</term>
<listitem>
<para>
- With this mode, you can draw a broken line that you can
- smooth by clicking the <guibutton>Curve Type</guibutton>
- button again.
+ With this mode, you can draw a free hand line that you can
+ smooth by clicking the <guilabel>Smooth</guilabel> Curve
+ type.
</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
- <varlistentry>
- <term>Preview and Split view</term>
- <listitem>
- <para>
- These are common features described in
- <xref linkend="gimp-colors-introduction"/>.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
- <variablelist>
- <title>Tool Options dialog</title>
- <para>
- <figure>
- <title><quote>Levels</quote> tool options</title>
- <mediaobject>
- <imageobject>
- <imagedata format="PNG"
- fileref="images/toolbox/tool-options-curves.png"/>
- </imageobject>
- </mediaobject>
- </figure>
- </para>
- <para>
- Although this tool is not present in the Toolbox by default (For this,
- please refer to <xref linkend="gimp-prefs-toolbox"/> if you want to add
- it), nevertheless it has a Tool Option Dialog under the Toolbox. These
- options are described here:
- </para>
-
- <varlistentry>
- <term>Sample Average</term>
- <listitem>
- <para>
- This slider sets the <quote>radius</quote> of the color-picking
- area. This area appears as a more or less enlarged square when you
- maintain the click on a pixel. Here, the eye-dropper is used to
- locate a pixel: radius = 1 seems the best.
- </para>
- </listitem>
- </varlistentry>
</variablelist>
</sect3>
<sect3>
- <title>Using the <quote>Curves</quote> tool</title>
+ <title>Using <quote>Curves</quote></title>
<sect4>
<title>Summary and basic shapes</title>
<para>
- We create anchors and segments on the curve and we move them to
+ We create points and segments on the curve and we move them to
shape the curve. This curve maps <quote>input</quote> tones of
the active layer or selection to <quote>output</quote> tones.
</para>
@@ -313,14 +328,14 @@
<title>How the Curves tool works</title>
<para>
- Moving the anchor of a pixel upwards makes this pixel brighter.
+ Moving the point a pixel upwards makes this pixel brighter.
</para>
<mediaobject>
<imageobject>
<imagedata fileref="images/toolbox/curves-work.png" format="PNG"/>
</imageobject>
<caption>
- <para lang="en">Moving the anchor upwards</para>
+ <para lang="en">Moving the point upwards</para>
</caption>
</mediaobject>
</simplesect>
diff --git a/src/toolbox/selection/foreground.xml b/src/toolbox/selection/foreground.xml
index ad1039e40..d321c874c 100644
--- a/src/toolbox/selection/foreground.xml
+++ b/src/toolbox/selection/foreground.xml
@@ -124,10 +124,8 @@ xmlns:xi="http://www.w3.org/2001/XInclude"; id="gimp-tool-foreground-select">
fileref="images/toolbox/FG-select-pop-up.png"/>
</imageobject>
</mediaobject>
- <para>
- For the moment, only a little <emphasis>cross</emphasis> is active,
- allowing to quit: returns to the original image.
- </para>
+ For the moment, only a little <emphasis>cross</emphasis> is active,
+ allowing to quit: returns to the original image.
</para>
</step>
<step>
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