The first chip available to a wider market was 3Dlabs' Permedia II, which supported a one-bit stencil buffer. Stencil and Z-buffers are part of the frame buffer, coupled to the color buffer. Another variant is 4 + 24, where 28 of the 32 bits are used and 4 ignored. The stencil buffer typically shares the same memory space as the Z-buffer, and typically the ratio is 24 bits for Z-buffer + 8 bits for stencil buffer or, in the past, 15 bits for Z-buffer + 1 bit for stencil buffer. The stencil buffer and its modifiers can be accessed in computer graphics by using APIs like OpenGL, Direct3D or Vulkan. Other rendering techniques, such as portal rendering, use the stencil buffer in other ways for example, it can be used to find the area of the screen obscured by a portal and re-render those pixels correctly. The most typical application is still to add shadows to 3D applications. The simple combination of depth test and stencil modifiers make a vast number of effects possible (such as stencil shadow volumes, Two-Sided Stencil, compositing, decaling, dissolves, fades, swipes, silhouettes, outline drawing, or highlighting of intersections between complex primitives) though they often require several rendering passes and, therefore, can put a heavy load on the graphics hardware. For example, stencil values can be automatically increased/decreased for every pixel that fails or passes the depth test. More advanced usage of the stencil buffer makes use of the strong connection between the Z-buffer and the stencil buffer in the rendering pipeline. In the simplest case, the stencil buffer is used to limit the area of rendering (stenciling). The Z-buffer and stencil buffer often share the same area in the RAM of the graphics hardware. The buffer is per pixel and works on integer values, usually with a depth of one byte per pixel. If the buffer at that pixel has a value of 0 (black), color the pixel white (1) and vice versa.Ī stencil buffer is an extra data buffer, in addition to the color buffer and Z-buffer, found on modern graphics hardware. Shapes are then drawn on top of the stripes by inverting the value of the stencil buffer. In this image, there are white regions and black regions, representing 1s and 0s in the stencil buffer respectively. For more guidance, see Wikipedia:Translation.You should also add the template to the talk page.A model attribution edit summary is Content in this edit is translated from the existing Serbian Wikipedia article at ] see its history for attribution. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation.If possible, verify the text with references provided in the foreign-language article. Do not translate text that appears unreliable or low-quality.Consider adding a topic to this template: there are already 382 articles in the main category, and specifying |topic= will aid in categorization.Machine translation like DeepL or Google Translate is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.View a machine-translated version of the Serbian article.
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