Gradient
#!/usr/bin/env python # [SNIPPET_NAME: Gradient] # [SNIPPET_CATEGORIES: Cairo] # [SNIPPET_DESCRIPTION: Generate a gradient] # [SNIPPET_DOCS: http://www.tortall.net/mu/wiki/CairoTutorial] # [SNIPPET_LICENSE: MPL] import math import cairo import os WIDTH, HEIGHT = 256, 256 surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT) ctx = cairo.Context(surface) ctx.scale (WIDTH/1.0, HEIGHT/1.0) pat = cairo.LinearGradient (0.0, 0.0, 0.0, 1.0) pat.add_color_stop_rgba (1, 0, 0, 0, 1) pat.add_color_stop_rgba (0, 1, 1, 1, 1) ctx.rectangle (0,0,1,1) ctx.set_source (pat) ctx.fill () pat = cairo.RadialGradient (0.45, 0.4, 0.1, 0.4, 0.4, 0.5) pat.add_color_stop_rgba (0, 1, 1, 1, 1) pat.add_color_stop_rgba (1, 0, 0, 0, 1) ctx.set_source (pat) ctx.arc (0.5, 0.5, 0.3, 0, 2 * math.pi) ctx.fill () # the output is written to your home directory surface.write_to_png(os.path.expanduser("~") + '/gradient.png') #surface.write_to_png(10)