def save(self,
filename,
format='auto',
backend='auto',
backend_options={}):
if format == 'auto':
format = filename.split('.')[-1]
if backend == 'auto':
if format == 'png':
backend = 'image'
else:
backend = 'cairo'
# Create the backend instance
if backend == 'image':
backend = MathtexBackendImage()
elif backend == 'cairo':
if not HAVE_CAIRO_BACKEND:
raise RuntimeError(
"Cairo backend requested when not available.")
backend = MathtexBackendCairo()
# Set the options for the backend
backend.options = backend_options
# Render!
self.render_to_backend(backend)
# Save
backend.save(filename, format)
def _draw_mathtext(self, gc, x, y, s, prop, angle):
if _debug: print '%s.%s()' % (self.__class__.__name__, _fn_name())
if not HAVE_MATHTEX: return
ctx = gc.ctx
m = Mathtex(s, rcParams['mathtext.fontset'], prop.get_size_in_points(),
self.dpi, rcParams['mathtext.default'], cache=True)
b = MathtexBackendCairo()
m.render_to_backend(b)
ctx.save()
ctx.translate(x, y - m.height - m.depth)
if angle:
ctx.rotate (-angle * npy.pi / 180)
b.render_to_context(ctx)
ctx.restore()
def do_expose_event(self, event):
cr = self.window.cairo_create()
cr.rectangle(event.area.x, event.area.y,
event.area.width, event.area.height)
cr.clip()
width = self.bbox[2] - self.bbox[0]
height = self.box.height
depth = self.box.depth
backend = MathtexBackendCairo()
backend.set_canvas_size(self.box.width, self.box.height,
self.box.depth, 100)
backend.render(self.glyphs, self.rects)
backend.render_to_context(cr)
def _draw_mathtext(self, gc, x, y, s, prop, angle):
if _debug: print '%s.%s()' % (self.__class__.__name__, _fn_name())
if not HAVE_MATHTEX: return
ctx = gc.ctx
m = Mathtex(s,
rcParams['mathtext.fontset'],
prop.get_size_in_points(),
self.dpi,
rcParams['mathtext.default'],
cache=True)
b = MathtexBackendCairo()
m.render_to_backend(b)
ctx.save()
ctx.translate(x, y - m.height - m.depth)
if angle:
ctx.rotate(-angle * npy.pi / 180)
b.render_to_context(ctx)
ctx.restore()
