1GLPOLYGONSTIPPLE(3G)             OpenGL Manual            GLPOLYGONSTIPPLE(3G)
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NAME

6       glPolygonStipple - set the polygon stippling pattern
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C SPECIFICATION

9       void glPolygonStipple(const GLubyte * pattern);
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PARAMETERS

12       pattern
13           Specifies a pointer to a 32 × 32 stipple pattern that will be
14           unpacked from memory in the same way that glDrawPixels() unpacks
15           pixels.
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DESCRIPTION

18       Polygon stippling, like line stippling (see glLineStipple()), masks out
19       certain fragments produced by rasterization, creating a pattern.
20       Stippling is independent of polygon antialiasing.
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22       pattern is a pointer to a 32 × 32 stipple pattern that is stored in
23       memory just like the pixel data supplied to a glDrawPixels() call with
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25       height and width both equal to 32, a pixel format of GL_COLOR_INDEX,
26       and data type of GL_BITMAP. That is, the stipple pattern is represented
27       as a 32 × 32 array of 1-bit color indices packed in unsigned bytes.
28       glPixelStore() parameters like GL_UNPACK_SWAP_BYTES and
29       GL_UNPACK_LSB_FIRST affect the assembling of the bits into a stipple
30       pattern. Pixel transfer operations (shift, offset, pixel map) are not
31       applied to the stipple image, however.
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33       If a non-zero named buffer object is bound to the
34       GL_PIXEL_UNPACK_BUFFER target (see glBindBuffer()) while a stipple
35       pattern is specified, pattern is treated as a byte offset into the
36       buffer object's data store.
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38       To enable and disable polygon stippling, call glEnable() and
39       glDisable() with argument GL_POLYGON_STIPPLE. Polygon stippling is
40       initially disabled. If it's enabled, a rasterized polygon fragment with
41       window coordinates x w and y w is sent to the next stage of the GL if
42       and only if the (x w % 32)th bit in the (y w % 32)th row of the stipple
43       pattern is 1 (one). When polygon stippling is disabled, it is as if the
44       stipple pattern consists of all 1's.
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ERRORS

47       GL_INVALID_OPERATION is generated if a non-zero buffer object name is
48       bound to the GL_PIXEL_UNPACK_BUFFER target and the buffer object's data
49       store is currently mapped.
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51       GL_INVALID_OPERATION is generated if a non-zero buffer object name is
52       bound to the GL_PIXEL_UNPACK_BUFFER target and the data would be
53       unpacked from the buffer object such that the memory reads required
54       would exceed the data store size.
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56       GL_INVALID_OPERATION is generated if glPolygonStipple is executed
57       between the execution of glBegin() and the corresponding execution of
58       glEnd().
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ASSOCIATED GETS

61       glGetPolygonStipple()
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63       glIsEnabled() with argument GL_POLYGON_STIPPLE
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65       glGet() with argument GL_PIXEL_UNPACK_BUFFER_BINDING
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SEE ALSO

68       glDrawPixels(), glLineStipple(), glPixelStore(), glPixelTransfer()
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71       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
72       under the SGI Free Software B License. For details, see
73       http://oss.sgi.com/projects/FreeB/.
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AUTHORS

76       opengl.org
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80opengl.org                        07/13/2018              GLPOLYGONSTIPPLE(3G)
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