mirror of https://github.com/GNOME/gimp.git
115 lines
4.0 KiB
Plaintext
115 lines
4.0 KiB
Plaintext
====================
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Icon themes for GIMP
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====================
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---------------
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Released Themes
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---------------
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GIMP 2.10 comes with 4 icon themes:
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(1) Symbolic: the default icon theme (made for dark themes).
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We follow GNOME guidelines when possible:
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https://developer.gnome.org/hig/stable/icons-and-artwork.html.en
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(2) Symbolic-Inverted: programmatically generated from the "Symbolic"
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icon theme by inverting colors. Icon designers should not create icons
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specifically for "Symbolic-Inverted".
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Note: exceptions on the icon generation can be applied.
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For instance "gimp-default-colors" and "gimp-toilet-paper" icons are not
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inverted. And "gimp-color-picker-black" is generated by inverting
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"gimp-color-picker-white" and reciprocally.
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Ask for developer help when such exceptions are needed.
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(3) Color: a new color icon theme, also designed with vector graphics.
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(4) Legacy: this icon theme which contains the old GIMP 2.8 icons. It is
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not maintained anymore and we are not expecting new icons for Legacy.
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Yet since we keep them in the source tree for now, we would accept
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updates.
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The Symbolic icon theme are our main target since they are considered
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better suited for graphics work (less visual distraction). Color icons
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are kept as fall-over since some users still prefer them.
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----------------
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Adding new icons
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----------------
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- Add new icons in the single SVG file inside their respective
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directories, i.e. `icons/Symbolic/symbolic-scalable.svg` for symbolic
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icons and `icons/Color/color-scalable.svg` for color icons.
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A single file allows easier reuse of material, and easy overview of all
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existing icons which simplifies consistent styling…
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- The contents of the SVG file should be organized for easy management
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and easy contribution. You can visually group similar icons, make use
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of layers, whatever is necessary for organization.
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- You should group all parts of a single icon into a single object and
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id this object with the icon name. For instance the object containing
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the Move Tool icon should be id-ed: "gimp-tool-move".
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- Make sure the object has the right expected size. A good trick is to
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group with a square of the right size, made invisible.
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- Export the icon as PNG and SVG into the appropriate size directory.
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Ideally this step should be done at build time, but we could not find
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yet a reliable way to extract icons out of the single SVG file without
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using crazy build dependencies (like Inkscape). So this is done by hand
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for the time being.
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- Add the icons in `icons/icon-list.mk`.
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This file is shared by all 3 maintained icon themes (Symbolic,
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Symbolic-Inverted and Color), so you must make sure that you have the
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Symbolic as well as the Color icons drawn before adding them.
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Pixel perfection
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----------------
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Even as vector images, icons should be pixel-perfect when possible.
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Therefore the first step before making an icon is to determine which
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size it is supposed to appear at.
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If the icon could appear in several sizes:
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- if the sizes are multiples, just design the smaller size. The bigger
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icon will stay pixel-perfect when scaled by a multiple. So for instance,
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if you want the icon to be 12x12 and 24x24, just design the 12x12 icon.
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- of course, if the size difference is big enough, you may want to
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create a new version with added details, even when this is a multiple
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(i.e. 12x12 and 192x192 may be different designs). These are design
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choices.
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- when sizes are no multiple (i.e. 16x16 and 24x24), it is preferred to
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have 2 pixel-perfect versions.
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- if time is missing, creating the smaller size only is a first step
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and is acceptable.
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Sizes
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-----
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Some known sizes:
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- tool icons: 16x16 and 22x22.
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- dock tab icons: 16x16 and 24x24.
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- menu icons: 16x16.
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[…]
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-------------
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Testing icons
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-------------
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Menu items and buttons are not supposed to have icons any longer. Yet
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our actions have icons and some desktop environments would enable them
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in menus and buttons regardless. To test how we do on systems which do
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so, set the environment variable `GIMP_ICONS_LIKE_A_BOSS`.
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For instance, start GIMP like this:
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GIMP_ICONS_LIKE_A_BOSS=1 gimp-2.9
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