Graphics Reference
In-Depth Information
tiled deferred blending for those covering a screen area above a given threshold,
`ala
contribution culling
, could show some substantial gains.
Actually, the technique only works for screen-aligned quads, but, by passing
depth information to the GPU, it could be extended to support arbitrary oriented
sprites with perspective correct interpolation of the texture coordinates (at the
price of using dependent texture fetches).
It is my hope that this technique will serve others in developing better looking
effects while achieving their target performance on all devices.
Bibliography
[Apple 13a] Apple. “OpenGL ES Hardware Platform Guide for iOS.”
http://developer.apple.com/library/ios/documentation/OpenGLES/
PlatformGuide iOS.pdf, 2013.
[Apple 13b] Apple. “OpenGL ES Programming Guide for iOS.” http://
developer.apple.com/library/ios/documentation/3DDrawing/Conceptual/
[Forsyth 06] Tom Forsyth. “Premultiplied Alpha.” http://home.comcast.net/
2006.
[Imagination Technologies 12] Imagination Technologies. “PowerVR Perfor-
mance Recommendations.” http://www.imgtec.com/powervr/insider/docs/
org/registry/gles/specs/3.0/es spec 3.0.2.pdf, 2013.
[McCaffrey 12] Jon McCaffrey. “Exploring Mobile vs. Desktop OpenGL Perfor-
mance.” In
OpenGL Insights
, edited by Patrick Cozzi and Christophe Riccio,
Chapter 24, pp. 337-352. Boca Raton, FL: A K Peters/CRC Press, 2012.
[Merry 12] Bruce Merry. “Performance Tuning for Tile-Based Architectures.” In
OpenGL Insights
, edited by Patrick Cozzi and Christophe Riccio, pp. 323-
336. Boca Raton, Fl: A K Peters/CRC Press, 2012.
[NVIDIA 13] NVIDIA. “Optimize OpenGL ES 2.0 Performance for
Performance for Tegra.html, 2013.
[Olsson and Assarsson 11] Ola Olsson and Ulf Assarsson. “Tiled Shading.”
Jour-
nal of Graphics, GPU, and Game Tools
15:4 (2011), 235-251.
