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In computer graphics, pixels encoding the RGBA color space information must be stored in computer memory (or in files on disk). In most cases four equal-sized pieces of adjacent memory are used, one for each channel, and a 0 in a channel indicates black color or transparent alpha, while all-1 bits indicates white or fully opaque alpha.
OpenGL (Open Graphics Library [4]) is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics.The API is typically used to interact with a graphics processing unit (GPU), to achieve hardware-accelerated rendering.
In the x86 assembly language, the TEST instruction performs a bitwise AND on two operands. The flags SF, ZF, PF are modified while the result of the AND is discarded. The OF and CF flags are set to 0, while AF flag is undefined. There are 9 different opcodes for the TEST instruction depending on the type and size of the operands. It can compare ...
GLX demo (glxgears) included with X11. GLX consists of three parts: An API that provides OpenGL functions to an X Window System application.; An extension of the X protocol, which allows the client (the OpenGL application) to send 3D rendering commands to the X server (the software responsible for the display).
The computer graphics pipeline, also known as the rendering pipeline, or graphics pipeline, is a framework within computer graphics that outlines the necessary procedures for transforming a three-dimensional (3D) scene into a two-dimensional (2D) representation on a screen. [1]
The Khronos CTS test suite for OpenGL 4.4, 4.5 and OpenGL ES 3.0+ is in now (2017-01-24) Open Source and all tests for Mesa 13 and 17 are now possible without costs. [ 17 ] 2nd stable version of 2017, 17.1.0, came out on 10 May 2017 with some interesting improvements.
The 'ETC2' scheme expands ETC1 in a backwards-compatible way to provide higher quality RGB compression, [6] as well as compression of RGBA (RGB plus alpha). The following ETC2 codecs are mandatory in OpenGL ES 3.0 [7] and OpenGL 4.3: [8]
The Direct Rendering Infrastructure (DRI) is the framework comprising the modern Linux graphics stack which allows unprivileged user-space programs to issue commands to graphics hardware without conflicting with other programs. [6] The main use of DRI is to provide hardware acceleration for the Mesa implementation of OpenGL.