3D graphics eBook - Course Materials Repository

Texture synthesis 222
• Micro-texture synthesis by phase randomization, with code and online demonstration (http:/ / www. ipol. im/ pub/
algo/ ggm_random_phase_texture_synthesis/ )
Tiled rendering
Tiled rendering is the process of subdividing (or tiling) a computer graphics image by a regular grid in image space
to exploit local spatial coherence in the scene and/or to facilitate the use of limited hardware rendering resources
later in the graphics pipeline. Tiling is also used to create nonlinear framebuffer to make adjacent pixels also
[1] [2]
adjacent in memory.
Major examples of this are:
• PowerVR rendering architecture: The rasterizer consisted of a 32×32 tile into which polygons were rasterized
across the image across multiple pixels in parallel. On early PC versions, tiling was performed in the display
driver running on the CPU. In the application of the Dreamcast console, tiling was performed by a piece of
hardware. This facilitated deferred rendering—only the visible pixels were texture-mapped, saving shading
calculations and texture-bandwidth.
• Xbox 360: the GPU contains an embedded 10 MiB framebuffer; this is not sufficient to hold the raster for an
entire 1280×720 image with 4× anti-aliasing, so a tiling solution is superimposed.
• Implementations of Reyes rendering often divide the image into "tile buckets".
• Pixel Planes 5 architecture (1991) [3]
• Microsoft Talisman (1996)
• Dreamcast (1998)
• PSVita [4]
• Intel Larrabee GPU (canceled)
References
[1] Deucher, Alex (2008-05-16). "How Video Cards Work" (http:/ / www. x. org/ wiki/ Development/ Documentation/ HowVideoCardsWork).
X.Org Foundation. . Retrieved 2010-05-27.
[2] Bridgman, John (2009-05-19). "How the X (aka 2D) driver affects 3D performance" (http:/ / jbridgman. livejournal. com/ 718. html).
LiveJournal. . Retrieved 2010-05-27.
[3] Mahaney, Jim (1998-06-22). "History" (http:/ / www. cs. unc. edu/ ~pxfl/ history. html). Pixel-Planes. University of North Carolina at Chapel
Hill. . Retrieved 2008-08-04.
[4] mestour, mestour (2011-07-21). "Develop 2011: PS Vita is the most developer friendly hardware Sony has ever made" (http:/ / 3dsforums.
com/ lounge-2/ develop-2011-ps-vita-most-developer-friendly-hardware-sony-has-ever-made-19841/ ). PSVita. 3dsforums. . Retrieved
2011-07-21.