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- cccclllleeeeaaaarrrr((((3333GGGG)))) cccclllleeeeaaaarrrr((((3333GGGG))))
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- NNNNAAAAMMMMEEEE
- cccclllleeeeaaaarrrr - clears the viewport
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- FFFFOOOORRRRTTTTRRRRAAAANNNN 77777777 SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
- ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee cccclllleeeeaaaarrrr
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- PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRRSSSS
- _n_o_n_e
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- cccclllleeeeaaaarrrr sets the bitplane area of the viewport to the current color.
- Multiple bitplane buffers can be cleared simultaneously using the bbbbaaaacccckkkkbbbbuuuu,
- ffffrrrroooonnnnttttbbbb, and zzzzddddrrrraaaawwww commands. Current polygon fill pattern and writemask
- affect the operation of cccclllleeeeaaaarrrr. The screen mask, when it is set to a
- subregion of the viewport, bounds the cleared region. Alpha function,
- blend function, logical operation, stenciling, texture mapping, and z
- buffering, however, are ignored by cccclllleeeeaaaarrrr. Stencil and z buffer contents
- are not affected by cccclllleeeeaaaarrrr (except in the special case of zzzzddddrrrraaaawwww).
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- Like other drawing commands, cccclllleeeeaaaarrrr operates on the currently active
- framebuffer, one of normal, popup, overlay, or underlay, based on the
- current draw mode (see ddddrrrraaaawwwwmmmmoooo).
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- After cccclllleeeeaaaarrrr executes, the graphics position is undefined.
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- afunct, backbu, blendf, czclea, drawmo, frontb, logico, scrmas, setpat,
- stenci, texbin, zbuffe, zdraw
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- NNNNOOOOTTTTEEEE
- On the IRIS-4D B, G, GT, GTX, and VGX models, cccclllleeeeaaaarrrr runs faster when the
- window is completely unobscured.
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- On the Personal Iris, XS, XS24, XZ, Elan and Extreme systems, cccclllleeeeaaaarrrr runs
- faster when the visible window area consists of four or fewer rectangular
- regions.
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- PPPPaaaaggggeeee 1111
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