+++ /dev/null
-/* $XConsortium: miline.h /main/6 1996/08/12 21:51:09 dpw $ */
-
-/*
-
-Copyright (c) 1994 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from the X Consortium.
-
-*/
-
-#ifndef MILINE_H
-
-/*
- * Public definitions used for configuring basic pixelization aspects
- * of the sample implementation line-drawing routines provided in
- * {mfb,mi,cfb*} at run-time.
- */
-
-#define XDECREASING 4
-#define YDECREASING 2
-#define YMAJOR 1
-
-#define OCTANT1 (1 << (YDECREASING))
-#define OCTANT2 (1 << (YDECREASING|YMAJOR))
-#define OCTANT3 (1 << (XDECREASING|YDECREASING|YMAJOR))
-#define OCTANT4 (1 << (XDECREASING|YDECREASING))
-#define OCTANT5 (1 << (XDECREASING))
-#define OCTANT6 (1 << (XDECREASING|YMAJOR))
-#define OCTANT7 (1 << (YMAJOR))
-#define OCTANT8 (1 << (0))
-
-#define XMAJOROCTANTS (OCTANT1 | OCTANT4 | OCTANT5 | OCTANT8)
-
-#define DEFAULTZEROLINEBIAS (OCTANT2 | OCTANT3 | OCTANT4 | OCTANT5)
-
-/*
- * Devices can configure the rendering of routines in mi, mfb, and cfb*
- * by specifying a thin line bias to be applied to a particular screen
- * using the following function. The bias parameter is an OR'ing of
- * the appropriate OCTANT constants defined above to indicate which
- * octants to bias a line to prefer an axial step when the Bresenham
- * error term is exactly zero. The octants are mapped as follows:
- *
- * \ | /
- * \ 3 | 2 /
- * \ | /
- * 4 \ | / 1
- * \|/
- * -----------
- * /|\
- * 5 / | \ 8
- * / | \
- * / 6 | 7 \
- * / | \
- *
- * For more information, see "Ambiguities in Incremental Line Rastering,"
- * Jack E. Bresenham, IEEE CG&A, May 1987.
- */
-
-extern void miSetZeroLineBias(
-#if NeedFunctionPrototypes
- ScreenPtr /* pScreen */,
- unsigned int /* bias */
-#endif
-);
-
-/*
- * Private definitions needed for drawing thin (zero width) lines
- * Used by the mi, mfb, and all cfb* components.
- */
-
-#define X_AXIS 0
-#define Y_AXIS 1
-
-#define OUT_LEFT 0x08
-#define OUT_RIGHT 0x04
-#define OUT_ABOVE 0x02
-#define OUT_BELOW 0x01
-
-#define OUTCODES(_result, _x, _y, _pbox) \
- if ( (_x) < (_pbox)->x1) (_result) |= OUT_LEFT; \
- else if ( (_x) >= (_pbox)->x2) (_result) |= OUT_RIGHT; \
- if ( (_y) < (_pbox)->y1) (_result) |= OUT_ABOVE; \
- else if ( (_y) >= (_pbox)->y2) (_result) |= OUT_BELOW;
-
-#define SWAPINT(i, j) \
-{ register int _t = i; i = j; j = _t; }
-
-#define SWAPPT(i, j) \
-{ DDXPointRec _t; _t = i; i = j; j = _t; }
-
-#define SWAPINT_PAIR(x1, y1, x2, y2)\
-{ int t = x1; x1 = x2; x2 = t;\
- t = y1; y1 = y2; y2 = t;\
-}
-
-#define miGetZeroLineBias(_pScreen) \
- ((miZeroLineScreenIndex < 0) ? \
- 0 : ((_pScreen)->devPrivates[miZeroLineScreenIndex].uval))
-
-#define CalcLineDeltas(_x1,_y1,_x2,_y2,_adx,_ady,_sx,_sy,_SX,_SY,_octant) \
- (_octant) = 0; \
- (_sx) = (_SX); \
- if (((_adx) = (_x2) - (_x1)) < 0) { \
- (_adx) = -(_adx); \
- (_sx = -(_sx)); \
- (_octant) |= XDECREASING; \
- } \
- (_sy) = (_SY); \
- if (((_ady) = (_y2) - (_y1)) < 0) { \
- (_ady) = -(_ady); \
- (_sy = -(_sy)); \
- (_octant) |= YDECREASING; \
- }
-
-#define SetYMajorOctant(_octant) ((_octant) |= YMAJOR)
-
-#define FIXUP_ERROR(_e, _octant, _bias) \
- (_e) -= (((_bias) >> (_octant)) & 1)
-
-#define IsXMajorOctant(_octant) (!((_octant) & YMAJOR))
-#define IsYMajorOctant(_octant) ((_octant) & YMAJOR)
-#define IsXDecreasingOctant(_octant) ((_octant) & XDECREASING)
-#define IsYDecreasingOctant(_octant) ((_octant) & YDECREASING)
-
-extern int miZeroLineScreenIndex;
-
-extern int miZeroClipLine(
-#if NeedFunctionPrototypes
- int /*xmin*/,
- int /*ymin*/,
- int /*xmax*/,
- int /*ymax*/,
- int * /*new_x1*/,
- int * /*new_y1*/,
- int * /*new_x2*/,
- int * /*new_y2*/,
- unsigned int /*adx*/,
- unsigned int /*ady*/,
- int * /*pt1_clipped*/,
- int * /*pt2_clipped*/,
- int /*octant*/,
- unsigned int /*bias*/,
- int /*oc1*/,
- int /*oc2*/
-#endif
-);
-
-#endif /* MILINE_H */
projects / rdpsrv / blobdiff