GLVIEWPORT(3G)

📦
version 1.1 · 7 versions
, in centos-stream 9

🎀 GLVIEWPORT(3G) — glViewport: set the viewport 🎀

okay bestie, this is the 3G manual page for glViewport, and the header’s manual tag is [FIXME: manual] — yes, still a FIXME, we love a work in progress 💀 let’s get into it. ✨

✨ NAME ✨

glViewport — set the viewport 💅

🧚 C SPECIFICATION 💖

void glViewport(GLint x, GLint y, GLsizei width, GLsizei height);

🌸 PARAMETERS 🌸

  • x, y — these specify the lower left corner of the viewport rectangle, in pixels. the initial value is (0,0) 🫶
  • width, height — these specify the width and height of the viewport. when a GL context is first attached to a window, width and height are set to the dimensions of that window ✨

🦋 DESCRIPTION 🦋

okay so glViewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let x nd and y nd be normalized device coordinates. Then the window coordinates x w and y w are computed as follows:

x w = x nd + 1 ⁢ width 2 + x

y w = y nd + 1 ⁢ height 2 + y

viewport width and height are silently clamped to a range that depends on the implementation. to query this range, call glGet() with argument GL_MAX_VIEWPORT_DIMS 🔍

💀 ERRORS 💀

GL_INVALID_VALUE is generated if either width or height is negative. like, do not do that. 😭

🔎 ASSOCIATED GETS 🔎

  • glGet() with argument GL_VIEWPORT
  • glGet() with argument GL_MAX_VIEWPORT_DIMS

👑 VERSION SUPPORT 👑

the grid’s header is Function / Feature Name versus OpenGL Version. the function / feature name is glViewport, and it gets a ✔ in every single listed version:

  • OpenGL 2.0 — ✔
  • OpenGL 2.1 — ✔
  • OpenGL 3.0 — ✔
  • OpenGL 3.1 — ✔
  • OpenGL 3.2 — ✔
  • OpenGL 3.3 — ✔
  • OpenGL 4.0 — ✔
  • OpenGL 4.1 — ✔
  • OpenGL 4.2 — ✔
  • OpenGL 4.3 — ✔
  • OpenGL 4.4 — ✔
  • OpenGL 4.5 — ✔

she ate and left no crumbs. 👑✨

🌈 SEE ALSO 🌈

glDepthRange()

Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/. 🫶

Copyright © 1991-2006 Silicon Graphics, Inc.

Copyright © 2010-2014 Khronos Group

okay bestie, that’s the whole page 🫶 source/version: [FIXME: source] · date: 08/09/2021 · manual: GLVIEWPORT(3G) — mwah, go set that viewport 💖✨

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