docs: add master SVG for libvirt logo

Add the SVG files for the libvirt logo, along with corresponding pre-rendered PNG bitmaps at key sizes. Also add a README file describing how to modify the logos and their intended usages. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2026-08-13 06:34:42 -05:00 · 2016-11-11 09:31:10 +00:00
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+       Libvirt Logo README
+       ===================
+
+The master SVG files were created in InkScape, using the Overpass font from Red
+Hat:
+
+   http://overpassfont.org/
+
+
+Logo formats
+============
+
+The following SVG files are provided, along with standard bitmap sizes in PNG
+format:
+
+ - logo-base.svg
+
+   The basic "sardine tin" graphic used to create the other forms of the
+   libvirt logo.
+
+   The tin is rotated by 20 degrees, so its angle matches the angle of the left
+   side of the letter "v" in the Overpass font
+
+   Never use this logo file directly. It exists merely as a base for building
+   the other logos
+
+
+ - logo-square.svg
+
+   The minimal square format logo for libvirt. Simply embeds the word "libvirt"
+   into the basic logo graphic.
+
+   This is intended for use where a compact, square format representation of
+   the logo is required.
+
+   Bitmap sizes: 64, 128, 192, 256 px square
+
+
+ - logo-square-powered.svg
+
+   A variant of the square logo for use by 3rd party applications, to advertize
+   their use of libvirt.
+
+   Bitmap sizes: 64, 128, 192, 256 px square
+
+
+ - logo-banner-light.svg
+
+   A wide banner format of the logo. Embeds the words "libvirt virtualization
+   API" into the basic logo graphic. The text is rendered in a light color, so
+   suitable for placement over a dark background.
+
+   Bitmap sizes: 257x92, 800x286 px
+
+
+ - logo-banner-dark.svg
+
+   A wide banner format of the logo. Embeds the words "libvirt virtualization
+   API" into the basic logo graphic. The text is rendered in a dark color, so
+   suitable for placement over a light background.
+
+   Bitmap sizes: 257x92, 800x286 px
+
+
+PNG file creation
+=================
+
+The bitmap images should not be created in Inkscape, since its anti-aliasing of
+the rendered bitmaps is too aggressive, resulting in fuzzy images. Instead the
+GIMP is used to create bitmaps as follows:
+
+ - File -> Open, select the SVG file
+
+   When prompted for the image size, enter 1024 as the width and allow height
+   to be auto-set based on aspect ratio
+
+ - Image -> Scale Image
+
+   Enter desired final bitmap size and use "Cubic" as scaling method.
+
+ - File -> Export As
+
+
+It is important to let GIMP render initially at 1024 and then scale down, rather
+than rendering directly at the target size, since this the manual scaling step
+produces better quality