HP c8000 Gamma correction, Chapter, Gamma correction

overview of OpenGL

Gamma correction

Gamma correction

Gamma correction is used to alter hardware colormaps to compensate for the non-linearities in the phosphor brightness of monitors. Gamma correction can be used to improve the “ropy” or modulated appearance of antialiased lines. Gamma correction is also used to improve the appearance of shaded graphics images, as well as scanned photographic images that have not already been gamma corrected.

Chapter 1

Contents

OpenGL Implementation Guide for HP-UX11.x Legal Notices Restricted Rights Legend Contents 1. overview of OpenGL 2. installation and setup 3. running OpenGL programs 4. compiling and linking programs 5. programming hints Page overview of OpenGL introduction the OpenGL product hp’s implementation of OpenGL /opt/graphics/OpenGL/lib libGL.1 libGL.2 libGL.s1 pa20_64 supported visuals Graphics Devices.” Table Visual Table for HP Visualize fxe Visual Table for HP Visualize fx-5 / fx-10 Visual Table for HP Fire GL-UX(Continued) Visual Table for ATI Fire GL T2/X1/X3 stereo visual support for Visualize fx-5, fx-10,and Fire GL-UX Stereo Visual Support for HP Visualize fx-5and fx-10 Stereo Visual Support for HP Fire GL-UX Stereo Mode Visual Support for ATI Fire X1/X3 visual support for other graphics devices Visuals Table for VMD buffer sharing between multiple processes and threads SIGCHLD and the GRM daemon threads support threads support in November, 1999 11. ACE release Starting with the devresource.hp.com 32-bitlibrary. For example, GLint is a 32-bitinteger, not a 64-bitlong All 64-bitOpenGL libraries are located in opt/graphics/OpenGL/lib/pa20_64 Sample 32-bitcompile and link: Sample 64-bitcompile and link (for 11.x only): the standard OpenGL product Page mixing of OpenGL and Xlib Gamma correction OpenGL extensions visibility test extensions Enumerated Types for Occlusion GL_HP_supersample extension rendering details default visuals EXP and EXP2 fogging bow-tiequadrilaterals decomposition of concave quadrilaterals vertices outside of a begin/end pair index mode dithering environment variables new environment variables as of release Page installation and setup Page verification instructions is your system software preloaded with instant ignition verify that OpenGL is on your workstation installing OpenGL 1. install OpenGL OpenGL Development Environment Filesets for 11.0 and OpenGL Runtime Environment Filesets for 11.0 and 2. check log file 3. verify the product the OpenGL file structure Page Page running OpenGL programs virtual GLX (VGL) mode visual support for the VGL mode special considerations Page running hp's implementation of the OpenGL stereo application Page Page compiling and linking programs overview including header files linking shared libraries compiling 32-bitand 64-bitapplications for OpenGL OpenGL procedure calls programming hints Page OpenGL correctness hints 4D values texture coordinates OpenGL performance hints display list performance Page Page ... many more vertices glEnd(); than this: glMaterial glEnd texture downloading performance selection performance state change optimization of lighting occlusion culling high frame rate applications rescaling normals