HP c8000 manual Gamma correction

Page 20

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.

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Chapter 1

Image 20

Contents OpenGL Implementation Guide Legal Notices Contents Installation and setup Programming hints Contents Overview of OpenGL Introduction OpenGL Reference ManualHp’s implementation of the OpenGL libraries OpenGL productHp’s implementation of OpenGL Supported graphics devices Supported operating systemsSupported visuals Visual Table for HP Visualize fxeVisual Table for ATI Fire GL T2/X1/X3 Stereo Visual Support for HP Fire GL-UX Visual support for other graphics devicesBuffer sharing between multiple processes and threads Sigchld and the GRM daemonBit programming Sample 64-bit compile and link for 11.x only SLS supportStandard OpenGL product OpenGL Utilities Library GLUInput and output routines OpenGL extensions for the X Window system GLXOpenGL product Mixing of OpenGL and Xlib Gamma correction OpenGL extensions Visibility test extensionsOcclusion extension Occlusion culling code fragmentsEnumerated Types for Occlusion GLHPsupersample extension Default visuals Rendering detailsEXP and EXP2 fogging Bow-tie quadrilateralsVertices outside of a begin/end pair Index mode ditheringDecomposition of concave quadrilaterals Environment variables New environment variables as of release Switches to the faster double buffering method Installation and setup Installation and setup Verify that OpenGL is on your workstation Verification instructionsIs your system software preloaded with instant ignition? Installing OpenGL Install OpenGLOpenGL Development Environment Filesets for 11.0 Check log file Verify the product OpenGL file structure 64-bit libraries are in a subdirectory OpenGL file structure Chapter Running OpenGL programs Special considerations Virtual GLX VGL modeVisual support for the VGL mode Bool hpglXDisplayIsVGLDisplay *dpy, int screen Running hps implementation of the OpenGL stereo application Running hps implementation of the OpenGL stereo application Running OpenGL programs Compiling and linking programs Overview Subdirectory This Directory ContainsIncluding header files Linking shared libraries Compiling 32-bit and 64-bit applications for OpenGL OpenGL procedure calls Programming hints Programming hints Texture coordinates OpenGL correctness hints4D values Glcompileandexecute mode OpenGL performance hintsDisplay list performance Geometric primitivesDraw array set extensions Textures State changes and their effects on display listsRegular primitive data Texture downloading performance Selection performanceState change High frame rate applications Optimization of lightingOcclusion culling Rescaling normals OpenGL performance hints

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