[cairo] API Suggestion

[James Mills]

Hi,

I'm not sure if you guys have this planned, but I've been using
pycairo, and it needs an api function that'll make it just that one bit
more usefull and nicer to use. cairo + pycair btw is really really
great :)

I've been trying to use pycairo to draw images and render them directly
using sdl (pygame).

pygame.image has a function called frombuffer, if pycairo's surface or
something had a similar function, perhaps tobuffer, or perhaps the
object itself could be some kind of buffer (I have no idea what I'm on
about here!) then you could easily:

image = pygame.image.frombuffer(ctx)

or something :)

Please find attached ex1.py which I was working on as a test.

Note: the only solution I (and other pygame developers) could find was
to use a temporary file, however this is slow :)

cheers
James

-- 
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- James Mills <prologic at shortcircuit.net.au>
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-------------- next part --------------
#!/usr/bin/env python

import cairo
import pygame
from pygame.locals import *

WIDTH = 400
HEIGHT = 400

def main():

	pygame.init()
	screen = pygame.display.set_mode((640,480))
	pygame.display.set_caption("PyCairo Example")
	screen.fill((255, 255, 255, 255))
	pygame.display.update()

	pygame.mouse.set_visible(1)

	surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT)
	ctx = cairo.Context(surface)

	ctx.set_line_width(1)

	ctx.move_to(200, 100)
	ctx.line_to(300, 300)
	ctx.rel_line_to(-200, 0)
	ctx.close_path()

	ctx.stroke()
	#surface.write_to_png("triangle.png")

	#image = pygame.image.load(surface.write_to_png())
	import tempfile
	f = tempfile.NamedTemporaryFile()
	surface.write_to_png(f.name)
	image = pygame.image.load(f.name)
	f.close()

	screen.blit(image, [0, 0])
	pygame.display.update()

	done = False
	while not done:
		for event in pygame.event.get():
			if event.type is QUIT:
				done = True

if __name__ == "__main__":
	main()