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Title: Graphics Stack for HelenOS Author: Petr Koupý Department / Institute: Department of Distributed and Dependable Systems Supervisor of the master thesis: Mgr. Martin Děcký Abstract: HelenOS is an experimental operating system based on a micro-kernel multi-server architecture. Before the inception of this thesis, HelenOS already contained numerous mod- ernly designed subsystems responsible for various system tasks. However, it lacked the proper subsystem for interaction with the user. While the input part of such subsystem was already in an advanced stage of development, the output part was just a quick and temporary solution in order to have at least some mean to populate the screen with information. This thesis deals with the creation of a proper graphics subsystem that would replace the temporary one. The resulting new HelenOS graphics subsystem is designed according to the state-of-the-art prin- ciples found within the problem domain. Although minimalistic, the initial implementation is highly extensible and already practically usable by the HelenOS developer community. The thesis covers all important parts of the graphics subsystem - graphic driver infrastructure, drawing library, graphics server and a toolkit for creation of application user interface. Keywords: graphics subsystem, graphical user...

by Kwan Yuk-choi James, Ng Yuk-kau Sam. / Bibliography: leaves 111-112 / Thesis (M.B.A.)--Chinese University of Hong Kong, 1982

Choi, Yuet Kei. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (leaves 68-72). / Abstracts in English and Chinese. / Acknowledgement --- p.i / Abstract --- p.ii / Contents --- p.vi / List of Figures --- p.viii / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Previous Works --- p.3 / Chapter 1.1.1 --- Template deformation --- p.3 / Chapter 1.1.2 --- Mesh partitioning --- p.3 / Chapter 1.1.3 --- Mesh Smoothing --- p.4 / Chapter 1.2 --- Overview of the approach --- p.5 / Chapter 1.3 --- Thesis outline --- p.7 / Chapter 2. --- Global Deformation --- p.8 / Chapter 2.1 --- The closet point method --- p.10 / Chapter 2.1.1 --- Computational complexity --- p.11 / Chapter 2.2 --- Deformation Techniques --- p.12 / Chapter 2.2.1 --- Existing deformation method --- p.12 / Chapter 2.2.2 --- Radial Basis Functions (RBFs) --- p.14 / Chapter 2.2.2.1 --- Computational complexity --- p.18 / Chapter 2.2.3 --- Result --- p.18 / Chapter 2.3 --- Face flip prevention --- p.20 / Chapter 2.3.1 --- Detection of the flipped face --- p.22 / Chapter 2.3.1.1 --- Common approach: --- p.22 / Chapter 2.3.1.2 --- Our Approach --- p.23 / Chapter 2.3.1.3 --- Comparisons of the face flip detection method: --- p.26 / Chapter 2.3.2 --- Local Subdivision --- p.27 / Chapter 3. --- Partitioning of the mesh --- p.29 / Chapter 3.1 --- Existing method --- p.29 / Chapter 3.2 --- Our approach --- p.31 / Chapter 3.3 --- Computational complexity --- p.34 / Chapter 4. --- Mesh smoothing algorithm --- p.35 / Chapter 4.1 --- The Laplacian flow method --- p.36 / Chapter 4.2 --- The mean-curvature method --- p.40 / Chapter 4.3 --- Our Approach --- p.43 / Chapter 4.3.1 --- The modified mean-curvature method --- p.43 / Chapter 4.3.2 --- The modified Laplacian flow method --- p.45 / Chapter 4.3.3 --- Feature constraints --- p.47 / Chapter 4.3.4 --- Computational complexity --- p.47 / Chapter 4.4 --- Comparison of the mesh smoothing approach --- p.48 / Chapter 5. --- Implementation and Results --- p.51 / Chapter 5.1 --- Construction of the template mesh and boundary curves --- p.51 / Chapter 5.2 --- Selection of the corresponding vertex pairs --- p.52 / Chapter 5.3 --- Results --- p.54 / Chapter 6. --- Conclusions --- p.63 / Chapter 6.1 --- Future development --- p.65 / Appendix A --- p.66 / Determination of the projected path on a mesh: --- p.66 / Reference --- p.68

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Digitized by Kansas Correctional Industries