SVG rendering in a PyGame application

Question

In a pyGame application, I would like to render resolution-free GUI widgets described in SVG.

What tool and/or library can I use to reach this goal ?

(I like

Answer 1

The question is quite old but 10 years passed and there is new possibility that works and does not require librsvg anymore. There is Cython wrapper over nanosvg library and it works:

from svg import Parser, Rasterizer


def load_svg(filename, surface, position, size=None):
    if size is None:
        w = surface.get_width()
        h = surface.get_height()
    else:
        w, h = size
    svg = Parser.parse_file(filename)
    rast = Rasterizer()
    buff = rast.rasterize(svg, w, h)
    image = pygame.image.frombuffer(buff, (w, h), 'ARGB')
    surface.blit(image, position)

I found Cairo/rsvg solution too complicated to get to work because of dependencies are quite obscure to install.

Answer 2

The last comment crashed when I ran it because svg.render_cairo() is expecting a cairo context and not a cairo surface. I created and tested the following function and it seems to run fine on my system.

import array,cairo, pygame,rsvg

def loadsvg(filename,surface,position):
    WIDTH = surface.get_width()
    HEIGHT = surface.get_height()
    data = array.array('c', chr(0) * WIDTH * HEIGHT * 4)
    cairosurface = cairo.ImageSurface.create_for_data(data, cairo.FORMAT_ARGB32, WIDTH, HEIGHT, WIDTH * 4)
    svg = rsvg.Handle(filename)
    svg.render_cairo(cairo.Context(cairosurface))
    image = pygame.image.frombuffer(data.tostring(), (WIDTH, HEIGHT),"ARGB")
    surface.blit(image, position) 

WIDTH = 800
HEIGHT = 600
pygame.init()
window = pygame.display.set_mode((WIDTH, HEIGHT))
screen = pygame.display.get_surface()

loadsvg("test.svg",screen,(0,0))

pygame.display.flip() 

clock = pygame.time.Clock()
while True:
    clock.tick(15)
    event = pygame.event.get()
    for e in event:
        if e.type == 12:
            raise SystemExit

Answer 3

pygamesvg seems to do what you want (though I haven't tried it).