Volume 1, No. 3, December 2015
General Information
- ISSN: 2395-647X (Online)
- Short Title: Int. J. Geol. Earth Sci.
- Frequency: Semi-annual
- Editor-in-Chief: Prof. Marina Fernandez de la Cruz, Complutense University of Madrid, Spain
- Associate Editor: Sujitha R. Reddy, Savitha Darsha
- DOI: 10.18178/ijges
- Abstracting/Indexing: Crossref, Google Scholar.
- E-mail questions to IJGES Editorial Office.
Effect on Application by Mechanism of GDI Rendering Functions and Solutions
2.Chinese Academy of Surveying and Mapping, Beijing, China
Abstract—GDI drawing-functions in Windows API were analyzed and found that GDI drawing-function mapped the world coordinate system (Cartesian coordinate system) origin (0, 0) to the pixel center between (0, 0) and (1, 1) of the device coordinate system (screen coordinates). It pointed out that in order to maintain the same graphic geometric characteristics and avoiding overprinting, GDI drawing functions compromised with the endpoints and the boundary pixels, which caused some strange phenomenon many programmers have not found and it was difficult to understand. In response to these phenomena, explanations are given. In addition, the effect on some applications is pointed out and solutions are proposed.
Index Terms—Graphics Device Interface, Drawing-Function; Primitive Output, Geometric Characteristics
Cite:Chunmei Chen, Qingyuan Li, and Huiling Jia, "Effect on Application by Mechanism of GDI Rendering Functions and Solutions," International Journal of Geology and Earth Science, Vol. 1, No. 3, pp. 24-45, December 2015.