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#!/usr/bin/python
# -*- coding:utf8 -*-
# Copyright 2014 Behdad Esfahbod <behdad@google.com>
# A slides file should populate the variable slides with
# a list of tuples. Each tuple should have:
#
# - Slide content
# - User data
# - Canvas width
# - Canvas height
#
# Slide content can be a string, a list of strings,
# a function returning one of those, or a generator
# yielding strings. The user data should be a dictionary or
# None, and is both used to communicate options to the
# renderer and to pass extra options to the theme functions.
#
# A function-based slide content will be passed a renderer object.
# Renderer is an object similar to a cairo.Context and
# pangocairo.CairoContext but has its own methods too.
# The more useful of them here are put_text, put_image, and
# set_allocation. See their pydocs.
slides = []
def slide_add(f, data=None, width=800, height=600):
#slides[:0] = [(f, data, width, height)]
slides.append ((f, data, width, height))
return f
import pango, pangocairo, cairo, os, signal
from pangopygments import highlight
# We use slide data to tell the theme who's speaking.
# That is, which side the bubble should point to.
behdad = -1
whois = 0
def who(name):
global whois
whois = name
# And convenience functions to add a slide. Can be
# used as a function decorator, or called directly.
def slide_who(f, who, data=None):
if data:
data = dict (data)
else:
data = {}
data['who'] = who
return slide_add (f, data)
def slide(f, data=None):
return slide_who (f, whois, data=data)
def slide_noone(f, data=None):
if data and 'who' in data:
return slide_who (f, data['who'], data=data)
else:
return slide_who (f, 0, data=data)
#
# Slides start here
#
who (behdad)
@slide
def title_slide (r):
r.move_to (400, 250)
r.put_text ("<b>FontTools</b>\n"+
"<span font_desc='30'>"+
"reviving an Open Source project &\n"+
"<span strikethrough='true'>re</span>building a thriving community"+
"</span>", valign=0, halign=0, desc="100")
r.move_to (400, 550)
r.put_text ("""Behdad Esfahbod\n<span font_desc="monospace 16">behdad@google.com\nhttp://behdad.org</span>""",
desc="20", halign=0, valign=-1)
def list_slide (l, data=None):
def s (r):
return '\n'.join (l)
#yield l[0]
#for i in l[1:]:
# yield '\n'+i
s.__name__ = l[0]
slide (s, data)
slide_noone("History")
slide_noone("Where")
def image_slide (f, width=600, height=600, imgwidth=0, imgheight=0, xoffset=0, yoffset=0, data=None):
def s (r):
r.move_to (400+xoffset, 300+yoffset)
r.put_image (f, width=imgwidth, height=imgheight)
x = (800 - width) * .5
y = (600 - height) * .5
r.set_allocation (x, y, width, height)
s.__name__ = f
slide (s, data)
return s
def draw_image (r, f, width=600, height=600, imgwidth=0, imgheight=0, xoffset=0, yoffset=0, data=None):
r.move_to (400+xoffset, 300+yoffset)
r.put_image (f, width=imgwidth, height=imgheight)
x = (800 - width) * .5
y = (600 - height) * .5
r.set_allocation (x, y, width, height)
slide_noone("<b>Demo\ntime!</b>")
# Demo!
slide_noone("<b>Limitations</b>")
slide("Memory\nfootprint")
slide("Speed+memory\nfont-dependent")
slide_noone("<b>Advantages</b>")
slide("Memory\nfootprint")
slide("Subpixel\npositioning")
slide("Pinch-to-zoom")
list_slide ([
"<b>Challenges</b>",
"• Shader size / complexity",
"• Pixel cost",
"• Conditionals",
"• Dependent texture lookups",
"• Variable loop iterations",
"• Interpolation accuracy",
], data={'align': pango.ALIGN_LEFT})
def source_slide(s, lang="python"):
s = highlight(s, lang)
s = "<span font_desc='monospace'>" + s + "</span>"
slide_noone (s, data={'align': pango.ALIGN_LEFT})
def patch_slide(s):
lines = s.split ("\n")
new_lines = []
for s in lines:
s = s.replace("&", "&").replace("<", "<")
if not s: s = ' '
if s[0] == '-':
s = "<span fgcolor='#d00'>%s</span>" % s
elif s[0] == '+':
s = "<span fgcolor='#0a0'>%s</span>" % s
elif s[0] != ' ':
s = "<b>%s</b>" % s
new_lines.append (s)
s = '\n'.join (new_lines)
s = "<span font_desc='monospace'>" + s + "</span>"
slide_noone (s, data={'align': pango.ALIGN_LEFT})
def commit_slide(s, who=None):
lines = s.split ("\n")
new_lines = []
for s in lines:
s = s.replace("&", "&").replace("<", "<")
if not s: s = ' '
if s[0] != ' ':
s = "<b>%s</b>" % s
new_lines.append (s)
s = '\n'.join (new_lines)
s = "<span font_desc='monospace'>" + s + "</span>"
if who:
slide_noone (s, data={'align': pango.ALIGN_LEFT, 'who': who})
else:
slide_noone (s, data={'align': pango.ALIGN_LEFT})
list_slide ([
"<b>Code: libglyphy</b>",
"• ~400 lines *.h",
"• ~2500 lines *.cc *.hh",
"• ~370 lines *.glsl",
"• No dependencies",
], data={'align': pango.ALIGN_LEFT})
list_slide ([
"<b>Code: glyphy-demo</b>",
"• ~2800 lines *.cc *.h",
"• ~150 lines *.glsl",
"• FreeType, GLUT",
], data={'align': pango.ALIGN_LEFT})
list_slide ([
"<b>More work</b>",
"• Subpixel-rendering",
"• Anisotropic-antialiasing",
], data={'align': pango.ALIGN_LEFT})
slide("<b>Gallery!</b>")
slide("<b>Q?</b>")
if __name__ == "__main__":
import slippy
import fonttools_theme
slippy.main (slides, fonttools_theme)
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