"Bake" an SVG image into a PNG at a given resolution? [closed]
I'm on Linux and I'd like to take an SVG file and bake it into a PNG file at a given resolution (scaling). Is there a way to do this quickly and effectively from the command line?
I'm looking for something like this:
svg2png --width 128 --height 128 input.svg output.png
Is there a tool for this?
Use ImageMagick's convert:
convert -resize 128x128 input.svg output.png
If the input canvas size is less than the given size, this will up-scale the output without re-sampling. To get a higher quality result, add -density parameter:
convert -density 500 -resize 128x128 input.svg output.png
ImageMagick rasters vector images to their canvas resolution to a default density of 72 dpi.
To up-scale with proper sampling, you could specify an over high value, like 500 dpi in above sample.
Using a too high raster density can be a performance issue with large size canvas. The lowest and ideal raster density is: raster_density = raster_size / original_size * original_density
This ideal raster density will output image directly to the expected size (no -resize needed). But as float number approximations may occur, a slightly higher value and a resize are recommended for pixel-perfect result.
You can get original size and density using ImageMagick's percent escapes:
convert input.svg -format "%w %h %[resolution.x] %[resolution.y]" info:
Note that ImageMagick doesn't handle the complete specifications of SVG. If having trouble with shapes rendered incorrectly, look at this thread about selecting ImageMagick SVG renderer.
Both rsvg and inkscape can:
$ rsvg
Usage: rsvg [OPTIONS...] file.svg file.png
-d, --dpi-x=<float> pixels per inch
-p, --dpi-y=<float> pixels per inch
-x, --x-zoom=<float> x zoom factor
-y, --y-zoom=<float> y zoom factor
-w, --width=<int> width
-h, --height=<int> height
-q, --quality=<int> JPEG quality
-f, --format=[png, jpeg] save format
-v, --version show version information
Help options:
-?, --help Show this help message
--usage Display brief usage message
And:
$ inkscape --help
Usage: inkscape [OPTIONS...] [FILE...]
Available options:
-V, --version Print the Inkscape version number
-z, --without-gui Do not use X server (only process
files from console)
-g, --with-gui Try to use X server (even if
$DISPLAY is not set)
-f, --file=FILENAME Open specified document(s) (option
string may be excluded)
-p, --print=FILENAME Print document(s) to specified
output file (use '| program' for
pipe)
-e, --export-png=FILENAME Export document to a PNG file
-d, --export-dpi=DPI The resolution used for exporting
SVG into bitmap (default 90)
-a, --export-area=x0:y0:x1:y1 Exported area in SVG user units
(default is the canvas; 0,0 is
lower-left corner)
-D, --export-area-drawing Exported area is the entire
drawing (not canvas)
-C, --export-area-canvas Exported area is the entire canvas
--export-area-snap Snap the bitmap export area
outwards to the nearest integer
values (in SVG user units)
-w, --export-width=WIDTH The width of exported bitmap in
pixels (overrides export-dpi)
-h, --export-height=HEIGHT The height of exported bitmap in
pixels (overrides export-dpi)
-i, --export-id=ID The ID of the object to export
-j, --export-id-only Export just the object with
export-id, hide all others (only
with export-id)
-t, --export-use-hints Use stored filename and DPI hints
when exporting (only with
export-id)
-b, --export-background=COLOR Background color of exported
bitmap (any SVG-supported color
string)
-y, --export-background-opacity=VALUE Background opacity of exported
bitmap (either 0.0 to 1.0, or 1 to
255)
-l, --export-plain-svg=FILENAME Export document to plain SVG file
(no sodipodi or inkscape
namespaces)
-P, --export-ps=FILENAME Export document to a PS file
-E, --export-eps=FILENAME Export document to an EPS file
-A, --export-pdf=FILENAME Export document to a PDF file
-T, --export-text-to-path Convert text object to paths on
export (EPS)
-F, --export-embed-fonts Embed fonts on export (Type 1
only) (EPS)
-B, --export-bbox-page Export files with the bounding box
set to the page size (EPS)
-X, --query-x Query the X coordinate of the
drawing or, if specified, of the
object with --query-id
-Y, --query-y Query the Y coordinate of the
drawing or, if specified, of the
object with --query-id
-W, --query-width Query the width of the drawing or,
if specified, of the object with
--query-id
-H, --query-height Query the height of the drawing
or, if specified, of the object
with --query-id
-S, --query-all List id,x,y,w,h for all objects
-I, --query-id=ID The ID of the object whose
dimensions are queried
-x, --extension-directory Print out the extension directory
and exit
--vacuum-defs Remove unused definitions from the
defs section(s) of the document
--verb-list List the IDs of all the verbs in
Inkscape
--verb=VERB-ID Verb to call when Inkscape opens.
--select=OBJECT-ID Object ID to select when Inkscape
opens.
Help options:
-?, --help Show this help message
--usage Display brief usage message