GLSCISSOR - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
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NAMEglScissor − define the scissor box
C SPECIFICATIONvoid glScissor(GLint x, GLint y, GLsizei width, GLsizei height);
PARAMETERSx, y Specify the lower left corner of the scissor box. Initially (0, 0). width, height Specify the width and height of the scissor box. When a GL context is first attached to a window, width and height are set to the dimensions of that window.
DESCRIPTIONglScissor defines a rectangle, called the scissor box, in window coordinates. The first two arguments, x and y, specify the lower left corner of the box. width and height specify the width and height of the box. To enable and disable the scissor test, call glEnable() and glDisable with argument GL_SCISSOR_TEST. The test is initially disabled. While the test is enabled, only pixels that lie within the scissor box can be modified by drawing commands. Window coordinates have integer values at the shared corners of frame buffer pixels. glScissor(0,0,1,1) allows modification of only the lower left pixel in the window, and glScissor(0,0,0,0) doesn't allow modification of any pixels in the window. When the scissor test is disabled, it is as though the scissor box includes the entire window.
ERRORSGL_INVALID_VALUE is generated if either width or height is negative.
ASSOCIATED GETSglGet() with argument GL_SCISSOR_BOX glIsEnabled() with argument GL_SCISSOR_TEST
VERSION SUPPORT OpenGL Version Function / Feature Name 2.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2.1 3.0 3.1 3.2 3.3 4.0 4.1 4.2 4.3 4.4 4.5 glScissor ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
SEE ALSOglEnable(), glViewport()
COPYRIGHTCopyright © 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
Copyright © 1991-2006 Silicon Graphics, Inc.
Copyright © 2010-2014 Khronos Group
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