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f78b12e570284aa8291f4ca1add24937fd107403vboxsyncdocumentation for any purpose is hereby granted without fee, provided that
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f78b12e570284aa8291f4ca1add24937fd107403vboxsyncTHE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
f78b12e570284aa8291f4ca1add24937fd107403vboxsyncIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Public definitions used for configuring basic pixelization aspects
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * of the sample implementation line-drawing routines provided in
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * {mfb,mi,cfb*} at run-time.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define OCTANT3 (1 << (XDECREASING|YDECREASING|YMAJOR))
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define XMAJOROCTANTS (OCTANT1 | OCTANT4 | OCTANT5 | OCTANT8)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define DEFAULTZEROLINEBIAS (OCTANT2 | OCTANT3 | OCTANT4 | OCTANT5)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Devices can configure the rendering of routines in mi, mfb, and cfb*
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * by specifying a thin line bias to be applied to a particular screen
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * using the following function. The bias parameter is an OR'ing of
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * the appropriate OCTANT constants defined above to indicate which
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * octants to bias a line to prefer an axial step when the Bresenham
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * error term is exactly zero. The octants are mapped as follows:
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * \ 3 | 2 /
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * 4 \ | / 1
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * -----------
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * 5 / | \ 8
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * / 6 | 7 \
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * For more information, see "Ambiguities in Incremental Line Rastering,"
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Jack E. Bresenham, IEEE CG&A, May 1987.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync unsigned int /* bias */
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Private definitions needed for drawing thin (zero width) lines
f78b12e570284aa8291f4ca1add24937fd107403vboxsync * Used by the mi, mfb, and all cfb* components.
f78b12e570284aa8291f4ca1add24937fd107403vboxsync else if ( (_x) >= (_pbox)->x2) (_result) |= OUT_RIGHT; \
f78b12e570284aa8291f4ca1add24937fd107403vboxsync else if ( (_y) >= (_pbox)->y2) (_result) |= OUT_BELOW;
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define MIOUTCODES(outcode, x, y, xmin, ymin, xmax, ymax) \
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define miGetZeroLineBias(_pScreen) ((unsigned long) (unsigned long*)\
f78b12e570284aa8291f4ca1add24937fd107403vboxsync dixLookupPrivate(&(_pScreen)->devPrivates, miZeroLineScreenKey))
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define CalcLineDeltas(_x1,_y1,_x2,_y2,_adx,_ady,_sx,_sy,_SX,_SY,_octant) \
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define SetYMajorOctant(_octant) ((_octant) |= YMAJOR)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define IsXMajorOctant(_octant) (!((_octant) & YMAJOR))
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define IsYMajorOctant(_octant) ((_octant) & YMAJOR)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define IsXDecreasingOctant(_octant) ((_octant) & XDECREASING)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define IsYDecreasingOctant(_octant) ((_octant) & YDECREASING)
f78b12e570284aa8291f4ca1add24937fd107403vboxsyncextern _X_EXPORT DevPrivateKeyRec miZeroLineScreenKeyRec;
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#define miZeroLineScreenKey (&miZeroLineScreenKeyRec)
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int /*xmin*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int /*ymin*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int /*xmax*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int /*ymax*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int * /*new_x1*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int * /*new_y1*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int * /*new_x2*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int * /*new_y2*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync unsigned int /*adx*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync unsigned int /*ady*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int * /*pt1_clipped*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int * /*pt2_clipped*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int /*octant*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync unsigned int /*bias*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int /*oc1*/,
f78b12e570284aa8291f4ca1add24937fd107403vboxsync int /*oc2*/
f78b12e570284aa8291f4ca1add24937fd107403vboxsync#endif /* MILINE_H */