GLPOLYGONSTIPPLE(3G) GLPOLYGONSTIPPLE(3G)

glPolygonStipple - set the polygon stippling pattern

void glPolygonStipple( const GLubyte *mask )












  

  
Specifies a pointer to a 32x32 stipple pattern that will be unpacked from
      memory in the same way that glDrawPixels unpacks pixels.










Polygon stippling, like line stippling (see glLineStipple),
    masks out certain fragments produced by rasterization, creating a pattern.
    Stippling is independent of polygon antialiasing.


mask is a pointer to a 32x32 stipple pattern that is stored
    in memory just like the pixel data supplied to a glDrawPixels call
    with height and width both equal to 32, a pixel of
    GL_COLOR_INDEX, and data type of GL_BITMAP. That is, the
    stipple pattern is represented as a 32x32 array of 1-bit color indices
    packed in unsigned bytes. glPixelStore parameters like
    GL_UNPACK_SWAP_BYTES and GL_UNPACK_LSB_FIRST affect the
    assembling of the bits into a stipple pattern. Pixel transfer operations
    (shift, offset, pixel map) are not applied to the stipple image,
  however.


To enable and disable polygon stippling, call glEnable and
    glDisable with argument GL_POLYGON_STIPPLE. Polygon stippling
    is initially disabled. If it's enabled, a rasterized polygon fragment with
    window coordinates xw and yw is sent to the next stage of the GL if and only
    if the (xw mod 32)th bit in the (yw mod 32)th row of the stipple pattern is
    1 (one). When polygon stippling is disabled, it is as if the stipple pattern
    consists of all 1's.








GL_INVALID_OPERATION is generated if
    glPolygonStipple is executed between the execution of glBegin
    and the corresponding execution of glEnd.








glGetPolygonStipple
  

  glIsEnabled with argument GL_POLYGON_STIPPLE








glDrawPixels, glLineStipple, glPixelStore,
    glPixelTransfer