Redefining Mobile Graphics Stack

Redefining Mobile Graphics Stack Ariya Hidayat

whoami

ariya hidayat 10+ years activity in FOSS was with Nokia, Qt now with Qualcomm Innovation Center

goals Share ideas! Provoke brainstroming!

share the love gitorious.org/qt-labs/graphics-dojo gitorious.org/ofi-labs/x2

hot devices

iPhone 3GS iPhone OS 3.1 320 × 480, 163 ppi OpenGL ES 2

Nexus One Android 2.1 480 × 800, 252 ppi OpenGL ES 2

Nokia N900 Maemo 5 800 × 480, 267 ppi OpenGL ES 2

pixel control

line drawing Bresenham line algorithm

anti-aliased line drawing Xiaolin Wu's line algorithm

polygon rasterization

path rasterization

transformation Scaling Rotation Perspective

perspective transformation

optimizations

blazing fast recipes ● alternative/faster code path ● avoid text layout whenever possible ● malloc-free common operations ● auto-adjustment of quality vs speed

hardware support & abstraction pixmap GLtexture VGImage layer display list VGPath FBO optimize further with smart caching

use-cases guided profiling app -graphicssystem trace qttracereplay painting.trace cairo-trace –profile app cairo-perf-trace painting.trace

multithreaded painting

efficient animation

goodies

color spaces

high-dynamic range

Dean S. Pemberton Old St Paul’s

special effects

lighting & shadow

night mode

geometrical deformation

underwater effect remember Quake 1?

(perceptive) faster response SVG up- and down-scaling optimize using tiles

progressive zoom user clicks “Zoom 2x” smooth scaled fast but “blocky”

shape morphing digital clock analog clock

physics

kinetic scrolling Mouse move Pressed Manual Scroll Mouse release Steady Mouse release Mouse move Auto Scroll Mouse press Stop Timer tick

easing curve Linear EaseInOut deacceleration acceleration

parallax effect

2.5 dimension 215 lines of code

2-d physics engine

photo slide

network ubiquity

distributed system (autoreplication?) in some remote machine

assistive technology

element tagging clock weather launcher autozoom contact

voice recognition (for driving?)

spread the love

gitorious.org/ofi-labs/x2

muito obrigado!

Redefining Mobile Graphics Stack

by ofilabs on Mar 13, 2010

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