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Diffstat (limited to 'mi/miwideline.h')
| -rw-r--r-- | mi/miwideline.h | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/mi/miwideline.h b/mi/miwideline.h new file mode 100644 index 000000000..71d2c369c --- /dev/null +++ b/mi/miwideline.h @@ -0,0 +1,244 @@ +/* $Xorg: miwideline.h,v 1.4 2001/02/09 02:05:22 xorgcvs Exp $ */ +/* + +Copyright 1988, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +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 OPEN GROUP 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 Open Group 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 Open Group. + +*/ + +/* Author: Keith Packard, MIT X Consortium */ + +#include "mispans.h" + +/* + * interface data to span-merging polygon filler + */ + +typedef struct _SpanData { + SpanGroup fgGroup, bgGroup; +} SpanDataRec, *SpanDataPtr; + +#define AppendSpanGroup(pGC, pixel, spanPtr, spanData) { \ + SpanGroup *group, *othergroup = NULL; \ + if (pixel == pGC->fgPixel) \ + { \ + group = &spanData->fgGroup; \ + if (pGC->lineStyle == LineDoubleDash) \ + othergroup = &spanData->bgGroup; \ + } \ + else \ + { \ + group = &spanData->bgGroup; \ + othergroup = &spanData->fgGroup; \ + } \ + miAppendSpans (group, othergroup, spanPtr); \ +} + +/* + * Polygon edge description for integer wide-line routines + */ + +typedef struct _PolyEdge { + int height; /* number of scanlines to process */ + int x; /* starting x coordinate */ + int stepx; /* fixed integral dx */ + int signdx; /* variable dx sign */ + int e; /* initial error term */ + int dy; + int dx; +} PolyEdgeRec, *PolyEdgePtr; + +#define SQSECANT 108.856472512142 /* 1/sin^2(11/2) - miter limit constant */ + +/* + * types for general polygon routines + */ + +typedef struct _PolyVertex { + double x, y; +} PolyVertexRec, *PolyVertexPtr; + +typedef struct _PolySlope { + int dx, dy; + double k; /* x0 * dy - y0 * dx */ +} PolySlopeRec, *PolySlopePtr; + +/* + * Line face description for caps/joins + */ + +typedef struct _LineFace { + double xa, ya; + int dx, dy; + int x, y; + double k; +} LineFaceRec, *LineFacePtr; + +/* + * macros for polygon fillers + */ + +#define MIPOLYRELOADLEFT if (!left_height && left_count) { \ + left_height = left->height; \ + left_x = left->x; \ + left_stepx = left->stepx; \ + left_signdx = left->signdx; \ + left_e = left->e; \ + left_dy = left->dy; \ + left_dx = left->dx; \ + --left_count; \ + ++left; \ + } + +#define MIPOLYRELOADRIGHT if (!right_height && right_count) { \ + right_height = right->height; \ + right_x = right->x; \ + right_stepx = right->stepx; \ + right_signdx = right->signdx; \ + right_e = right->e; \ + right_dy = right->dy; \ + right_dx = right->dx; \ + --right_count; \ + ++right; \ + } + +#define MIPOLYSTEPLEFT left_x += left_stepx; \ + left_e += left_dx; \ + if (left_e > 0) \ + { \ + left_x += left_signdx; \ + left_e -= left_dy; \ + } + +#define MIPOLYSTEPRIGHT right_x += right_stepx; \ + right_e += right_dx; \ + if (right_e > 0) \ + { \ + right_x += right_signdx; \ + right_e -= right_dy; \ + } + +#define MILINESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \ + oldPixel = pGC->fgPixel; \ + if (pixel != oldPixel) { \ + DoChangeGC (pGC, GCForeground, (XID *) &pixel, FALSE); \ + ValidateGC (pDrawable, pGC); \ + } \ +} +#define MILINERESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \ + if (pixel != oldPixel) { \ + DoChangeGC (pGC, GCForeground, (XID *) &oldPixel, FALSE); \ + ValidateGC (pDrawable, pGC); \ + } \ +} + +#ifdef NOINLINEICEIL +#define ICEIL(x) ((int)ceil(x)) +#else +#ifdef __GNUC__ +static __inline int ICEIL(x) + double x; +{ + int _cTmp = x; + return ((x == _cTmp) || (x < 0.0)) ? _cTmp : _cTmp+1; +} +#else +#define ICEIL(x) ((((x) == (_cTmp = (x))) || ((x) < 0.0)) ? _cTmp : _cTmp+1) +#define ICEILTEMPDECL static int _cTmp; +#endif +#endif + +extern void miFillPolyHelper( +#if NeedFunctionPrototypes + DrawablePtr /*pDrawable*/, + GCPtr /*pGC*/, + unsigned long /*pixel*/, + SpanDataPtr /*spanData*/, + int /*y*/, + int /*overall_height*/, + PolyEdgePtr /*left*/, + PolyEdgePtr /*right*/, + int /*left_count*/, + int /*right_count*/ +#endif +); +extern int miRoundJoinFace( +#if NeedFunctionPrototypes + LineFacePtr /*face*/, + PolyEdgePtr /*edge*/, + Bool * /*leftEdge*/ +#endif +); + +extern void miRoundJoinClip( +#if NeedFunctionPrototypes + LineFacePtr /*pLeft*/, + LineFacePtr /*pRight*/, + PolyEdgePtr /*edge1*/, + PolyEdgePtr /*edge2*/, + int * /*y1*/, + int * /*y2*/, + Bool * /*left1*/, + Bool * /*left2*/ +#endif +); + +extern int miRoundCapClip( +#if NeedFunctionPrototypes + LineFacePtr /*face*/, + Bool /*isInt*/, + PolyEdgePtr /*edge*/, + Bool * /*leftEdge*/ +#endif +); + +extern void miLineProjectingCap( +#if NeedFunctionPrototypes + DrawablePtr /*pDrawable*/, + GCPtr /*pGC*/, + unsigned long /*pixel*/, + SpanDataPtr /*spanData*/, + LineFacePtr /*face*/, + Bool /*isLeft*/, + double /*xorg*/, + double /*yorg*/, + Bool /*isInt*/ +#endif +); + +extern SpanDataPtr miSetupSpanData( +#if NeedFunctionPrototypes + GCPtr /*pGC*/, + SpanDataPtr /*spanData*/, + int /*npt*/ +#endif +); + +extern void miCleanupSpanData( +#if NeedFunctionPrototypes + DrawablePtr /*pDrawable*/, + GCPtr /*pGC*/, + SpanDataPtr /*spanData*/ +#endif +); |