2796

Random-access rendering of general vector graphics

Diego Nehab, Hugues Hoppe
Microsoft Research
ACM Transactions on Graphics. Vol. 27, no. 5. Dec. 2008

@article{nehab2008random,

   title={Random-access rendering of general vector graphics},

   author={Nehab, D. and Hoppe, H.},

   journal={ACM Transactions on Graphics (TOG)},

   volume={27},

   number={5},

   pages={1–10},

   issn={0730-0301},

   year={2008},

   publisher={ACM}

}

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We introduce a novel representation for random-access rendering of antialiased vector graphics on the GPU, along with efficient encoding and rendering algorithms. The representation supports a broad class of vector primitives, including multiple layers of semitransparent filled and stroked shapes, with quadratic outlines and color gradients. Our approach is to create a coarse lattice in which each cell contains a variable-length encoding of the graphics primitives it overlaps. These cell-specialized encodings are interpreted at runtime within a pixel shader. Advantages include localized memory access and the ability to map vector graphics onto arbitrary surfaces, or under arbitrary deformations. Most importantly, we perform both prefiltering and supersampling within a single pixel shader invocation, achieving inter-primitive antialiasing at no added memory bandwidth cost. We present an efficient encoding algorithm, and demonstrate high-quality real-time rendering of complex, real-world examples.
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