G
glGetPolygonStipple
Chapter 7
208
glGetPolygonStipple
glGetPolygonStipple: return the polygon stipple pattern.
C Specification
void glGetPolygonStipple
GLubyte *mask)
Parameters
mask Returns the stipple pattern. The initial value is all 1’s.
Description
glGetPolygonStipple returns to mask a 32 × 32 polygon stipple pattern. The pattern is
packed into memory as if glReadPixels with both height and width of 32, type of
GL_BITMAP, and format of GL_COLOR_INDEX were called, and the stipple pattern
were stored in an internal 32 × 32 color index buffer. Unlike glReadPixels, however, pixel
transfer operations (shift, offset, pixel map) are not applied to the returned stipple
image.
Notes
If an error is generated, no change is made to the contents of mask.
Errors
• GL_INVALID_OPERATION is generated if glGetPolygonStipple is executed
between the execution of glBegin and the corresponding execution of glEnd.
See Also
glPixelStore,
glPixelTransfer,
glPolygonStipple,
glReadPixels
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