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/*
* Smithsonian Astrophysical Observatory, Cambridge, MA, USA
* This code has been modified under the terms listed below and is made
* available under the same terms.
*/
/*
* Copyright 1993-2004 George A Howlett.
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include "bltGraph.h"
#include "bltGrMarkerPolygon.h"
static Blt_ConfigSpec polygonConfigSpecs[] = {
{BLT_CONFIG_CUSTOM, "-bindtags", "bindTags", "BindTags", "Polygon all",
Tk_Offset(PolygonMarker, obj.tags), BLT_CONFIG_NULL_OK,
&listOption},
{BLT_CONFIG_CAP_STYLE, "-cap", "cap", "Cap", "butt",
Tk_Offset(PolygonMarker, capStyle), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_CUSTOM, "-coords", "coords", "Coords", NULL,
Tk_Offset(PolygonMarker, worldPts), BLT_CONFIG_NULL_OK, &coordsOption},
{BLT_CONFIG_CUSTOM, "-dashes", "dashes", "Dashes", NULL,
Tk_Offset(PolygonMarker, dashes), BLT_CONFIG_NULL_OK, &dashesOption},
{BLT_CONFIG_STRING, "-element", "element", "Element", NULL,
Tk_Offset(PolygonMarker, elemName), BLT_CONFIG_NULL_OK},
{BLT_CONFIG_CUSTOM, "-fill", "fill", "Fill", "rred",
Tk_Offset(PolygonMarker, fill), BLT_CONFIG_NULL_OK, &colorPairOption},
{BLT_CONFIG_JOIN_STYLE, "-join", "join", "Join", "miter",
Tk_Offset(PolygonMarker, joinStyle), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PIXELS, "-linewidth", "lineWidth", "LineWidth",
"1", Tk_Offset(PolygonMarker, lineWidth),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_BOOLEAN, "-hide", "hide", "Hide", "no",
Tk_Offset(PolygonMarker, hide), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_CUSTOM, "-mapx", "mapX", "MapX", "x",
Tk_Offset(PolygonMarker, axes.x), 0, &bltXAxisOption},
{BLT_CONFIG_CUSTOM, "-mapy", "mapY", "MapY", "y",
Tk_Offset(PolygonMarker, axes.y), 0, &bltYAxisOption},
{BLT_CONFIG_STRING, "-name", (char*)NULL, (char*)NULL, NULL,
Tk_Offset(PolygonMarker, obj.name), BLT_CONFIG_NULL_OK},
{BLT_CONFIG_CUSTOM, "-outline", "outline", "Outline",
"black", Tk_Offset(PolygonMarker, outline),
BLT_CONFIG_NULL_OK, &colorPairOption},
{BLT_CONFIG_CUSTOM, "-state", "state", "State", "normal",
Tk_Offset(PolygonMarker, state), BLT_CONFIG_DONT_SET_DEFAULT, &stateOption},
{BLT_CONFIG_BITMAP, "-stipple", "stipple", "Stipple", NULL,
Tk_Offset(PolygonMarker, stipple), BLT_CONFIG_NULL_OK},
{BLT_CONFIG_BOOLEAN, "-under", "under", "Under", "no",
Tk_Offset(PolygonMarker, drawUnder),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PIXELS, "-xoffset", "xOffset", "XOffset", "0",
Tk_Offset(PolygonMarker, xOffset), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_BOOLEAN, "-xor", "xor", "Xor", "no",
Tk_Offset(PolygonMarker, xor), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PIXELS, "-yoffset", "yOffset", "YOffset", "0",
Tk_Offset(PolygonMarker, yOffset), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}
};
MarkerCreateProc Blt_CreatePolygonProc;
static MarkerConfigProc ConfigurePolygonProc;
static MarkerDrawProc DrawPolygonProc;
static MarkerFreeProc FreePolygonProc;
static MarkerMapProc MapPolygonProc;
static MarkerPointProc PointInPolygonProc;
static MarkerPostscriptProc PolygonToPostscriptProc;
static MarkerRegionProc RegionInPolygonProc;
static MarkerClass polygonMarkerClass = {
polygonConfigSpecs,
ConfigurePolygonProc,
DrawPolygonProc,
FreePolygonProc,
MapPolygonProc,
PointInPolygonProc,
RegionInPolygonProc,
PolygonToPostscriptProc,
};
Marker* Blt_CreatePolygonProc(void)
{
PolygonMarker *pmPtr;
pmPtr = calloc(1, sizeof(PolygonMarker));
pmPtr->classPtr = &polygonMarkerClass;
pmPtr->capStyle = CapButt;
pmPtr->joinStyle = JoinMiter;
return (Marker *)pmPtr;
}
static int PointInPolygonProc(Marker *markerPtr, Point2d *samplePtr)
{
PolygonMarker *pmPtr = (PolygonMarker *)markerPtr;
if ((markerPtr->nWorldPts >= 3) && (pmPtr->screenPts != NULL)) {
return Blt_PointInPolygon(samplePtr, pmPtr->screenPts,
markerPtr->nWorldPts + 1);
}
return FALSE;
}
static int RegionInPolygonProc(Marker *markerPtr, Region2d *extsPtr,
int enclosed)
{
PolygonMarker *pmPtr = (PolygonMarker *)markerPtr;
if ((markerPtr->nWorldPts >= 3) && (pmPtr->screenPts != NULL)) {
return Blt_RegionInPolygon(extsPtr, pmPtr->screenPts,
markerPtr->nWorldPts, enclosed);
}
return FALSE;
}
static void DrawPolygonProc(Marker *markerPtr, Drawable drawable)
{
Graph* graphPtr = markerPtr->obj.graphPtr;
PolygonMarker *pmPtr = (PolygonMarker *)markerPtr;
/* Draw polygon fill region */
if ((pmPtr->nFillPts > 0) && (pmPtr->fill.fgColor != NULL)) {
XPoint *dp, *points;
Point2d *sp, *send;
points = malloc(pmPtr->nFillPts * sizeof(XPoint));
if (points == NULL) {
return;
}
dp = points;
for (sp = pmPtr->fillPts, send = sp + pmPtr->nFillPts; sp < send;
sp++) {
dp->x = (short int)sp->x;
dp->y = (short int)sp->y;
dp++;
}
XFillPolygon(graphPtr->display, drawable, pmPtr->fillGC, points,
pmPtr->nFillPts, Complex, CoordModeOrigin);
free(points);
}
/* and then the outline */
if ((pmPtr->nOutlinePts > 0) && (pmPtr->lineWidth > 0) &&
(pmPtr->outline.fgColor != NULL)) {
Blt_Draw2DSegments(graphPtr->display, drawable, pmPtr->outlineGC,
pmPtr->outlinePts, pmPtr->nOutlinePts);
}
}
static void PolygonToPostscriptProc(Marker *markerPtr, Blt_Ps ps)
{
Graph* graphPtr = markerPtr->obj.graphPtr;
PolygonMarker *pmPtr = (PolygonMarker *)markerPtr;
if (pmPtr->fill.fgColor != NULL) {
/*
* Options: fg bg
* Draw outline only.
* x Draw solid or stipple.
* x x Draw solid or stipple.
*/
/* Create a path to use for both the polygon and its outline. */
Blt_Ps_Polyline(ps, pmPtr->fillPts, pmPtr->nFillPts);
/* If the background fill color was specified, draw the polygon in a
* solid fashion with that color. */
if (pmPtr->fill.bgColor != NULL) {
/* Draw the solid background as the background layer of the opaque
* stipple */
Blt_Ps_XSetBackground(ps, pmPtr->fill.bgColor);
/* Retain the path. We'll need it for the foreground layer. */
Blt_Ps_Append(ps, "gsave fill grestore\n");
}
Blt_Ps_XSetForeground(ps, pmPtr->fill.fgColor);
if (pmPtr->stipple != None) {
/* Draw the stipple in the foreground color. */
Blt_Ps_XSetStipple(ps, graphPtr->display, pmPtr->stipple);
} else {
Blt_Ps_Append(ps, "fill\n");
}
}
/* Draw the outline in the foreground color. */
if ((pmPtr->lineWidth > 0) && (pmPtr->outline.fgColor != NULL)) {
/* Set up the line attributes. */
Blt_Ps_XSetLineAttributes(ps, pmPtr->outline.fgColor,
pmPtr->lineWidth, &pmPtr->dashes, pmPtr->capStyle,
pmPtr->joinStyle);
/*
* Define on-the-fly a PostScript macro "DashesProc" that will be
* executed for each call to the Polygon drawing routine. If the line
* isn't dashed, simply make this an empty definition.
*/
if ((pmPtr->outline.bgColor != NULL) && (LineIsDashed(pmPtr->dashes))) {
Blt_Ps_Append(ps, "/DashesProc {\ngsave\n ");
Blt_Ps_XSetBackground(ps, pmPtr->outline.bgColor);
Blt_Ps_Append(ps, " ");
Blt_Ps_XSetDashes(ps, (Blt_Dashes *)NULL);
Blt_Ps_Append(ps, "stroke\n grestore\n} def\n");
} else {
Blt_Ps_Append(ps, "/DashesProc {} def\n");
}
Blt_Ps_Draw2DSegments(ps, pmPtr->outlinePts, pmPtr->nOutlinePts);
}
}
static int ConfigurePolygonProc(Marker *markerPtr)
{
Graph* graphPtr = markerPtr->obj.graphPtr;
PolygonMarker *pmPtr = (PolygonMarker *)markerPtr;
GC newGC;
XGCValues gcValues;
unsigned long gcMask;
Drawable drawable;
drawable = Tk_WindowId(graphPtr->tkwin);
gcMask = (GCLineWidth | GCLineStyle);
if (pmPtr->outline.fgColor != NULL) {
gcMask |= GCForeground;
gcValues.foreground = pmPtr->outline.fgColor->pixel;
}
if (pmPtr->outline.bgColor != NULL) {
gcMask |= GCBackground;
gcValues.background = pmPtr->outline.bgColor->pixel;
}
gcMask |= (GCCapStyle | GCJoinStyle);
gcValues.cap_style = pmPtr->capStyle;
gcValues.join_style = pmPtr->joinStyle;
gcValues.line_style = LineSolid;
gcValues.dash_offset = 0;
gcValues.line_width = LineWidth(pmPtr->lineWidth);
if (LineIsDashed(pmPtr->dashes)) {
gcValues.line_style = (pmPtr->outline.bgColor == NULL)
? LineOnOffDash : LineDoubleDash;
}
if (pmPtr->xor) {
unsigned long pixel;
gcValues.function = GXxor;
gcMask |= GCFunction;
pixel = Tk_3DBorderColor(graphPtr->plotBg)->pixel;
if (gcMask & GCBackground) {
gcValues.background ^= pixel;
}
gcValues.foreground ^= pixel;
if (drawable != None) {
DrawPolygonProc(markerPtr, drawable);
}
}
newGC = Blt_GetPrivateGC(graphPtr->tkwin, gcMask, &gcValues);
if (LineIsDashed(pmPtr->dashes)) {
Blt_SetDashes(graphPtr->display, newGC, &pmPtr->dashes);
}
if (pmPtr->outlineGC != NULL) {
Blt_FreePrivateGC(graphPtr->display, pmPtr->outlineGC);
}
pmPtr->outlineGC = newGC;
gcMask = 0;
if (pmPtr->fill.fgColor != NULL) {
gcMask |= GCForeground;
gcValues.foreground = pmPtr->fill.fgColor->pixel;
}
if (pmPtr->fill.bgColor != NULL) {
gcMask |= GCBackground;
gcValues.background = pmPtr->fill.bgColor->pixel;
}
if (pmPtr->stipple != None) {
gcValues.stipple = pmPtr->stipple;
gcValues.fill_style = (pmPtr->fill.bgColor != NULL)
? FillOpaqueStippled : FillStippled;
gcMask |= (GCStipple | GCFillStyle);
}
newGC = Tk_GetGC(graphPtr->tkwin, gcMask, &gcValues);
if (pmPtr->fillGC != NULL) {
Tk_FreeGC(graphPtr->display, pmPtr->fillGC);
}
pmPtr->fillGC = newGC;
if ((gcMask == 0) && !(graphPtr->flags & RESET_AXES) && (pmPtr->xor)) {
if (drawable != None) {
MapPolygonProc(markerPtr);
DrawPolygonProc(markerPtr, drawable);
}
return TCL_OK;
}
markerPtr->flags |= MAP_ITEM;
if (markerPtr->drawUnder) {
graphPtr->flags |= CACHE_DIRTY;
}
graphPtr->flags |= RESET_WORLD;
Blt_EventuallyRedrawGraph(graphPtr);
return TCL_OK;
}
static void FreePolygonProc(Marker *markerPtr)
{
PolygonMarker *pmPtr = (PolygonMarker *)markerPtr;
Graph* graphPtr = markerPtr->obj.graphPtr;
if (pmPtr->fillGC != NULL) {
Tk_FreeGC(graphPtr->display, pmPtr->fillGC);
}
if (pmPtr->outlineGC != NULL) {
Blt_FreePrivateGC(graphPtr->display, pmPtr->outlineGC);
}
if (pmPtr->fillPts != NULL) {
free(pmPtr->fillPts);
}
if (pmPtr->outlinePts != NULL) {
free(pmPtr->outlinePts);
}
if (pmPtr->screenPts != NULL) {
free(pmPtr->screenPts);
}
}
static void MapPolygonProc(Marker *markerPtr)
{
Graph* graphPtr = markerPtr->obj.graphPtr;
PolygonMarker *pmPtr = (PolygonMarker *)markerPtr;
Point2d *screenPts;
Region2d extents;
int nScreenPts;
if (pmPtr->outlinePts != NULL) {
free(pmPtr->outlinePts);
pmPtr->outlinePts = NULL;
pmPtr->nOutlinePts = 0;
}
if (pmPtr->fillPts != NULL) {
free(pmPtr->fillPts);
pmPtr->fillPts = NULL;
pmPtr->nFillPts = 0;
}
if (pmPtr->screenPts != NULL) {
free(pmPtr->screenPts);
pmPtr->screenPts = NULL;
}
if (markerPtr->nWorldPts < 3) {
return; /* Too few points */
}
/*
* Allocate and fill a temporary array to hold the screen coordinates of
* the polygon.
*/
nScreenPts = markerPtr->nWorldPts + 1;
screenPts = malloc((nScreenPts + 1) * sizeof(Point2d));
{
Point2d *sp, *dp, *send;
dp = screenPts;
for (sp = markerPtr->worldPts, send = sp + markerPtr->nWorldPts;
sp < send; sp++) {
*dp = Blt_MapPoint(sp, &markerPtr->axes);
dp->x += markerPtr->xOffset;
dp->y += markerPtr->yOffset;
dp++;
}
*dp = screenPts[0];
}
Blt_GraphExtents(graphPtr, &extents);
markerPtr->clipped = TRUE;
if (pmPtr->fill.fgColor != NULL) { /* Polygon fill required. */
Point2d *fillPts;
int n;
fillPts = malloc(sizeof(Point2d) * nScreenPts * 3);
n = Blt_PolyRectClip(&extents, screenPts, markerPtr->nWorldPts,fillPts);
if (n < 3) {
free(fillPts);
} else {
pmPtr->nFillPts = n;
pmPtr->fillPts = fillPts;
markerPtr->clipped = FALSE;
}
}
if ((pmPtr->outline.fgColor != NULL) && (pmPtr->lineWidth > 0)) {
Segment2d *outlinePts;
Segment2d *segPtr;
Point2d *sp, *send;
/*
* Generate line segments representing the polygon outline. The
* resulting outline may or may not be closed from viewport clipping.
*/
outlinePts = malloc(nScreenPts * sizeof(Segment2d));
if (outlinePts == NULL) {
return; /* Can't allocate point array */
}
/*
* Note that this assumes that the point array contains an extra point
* that closes the polygon.
*/
segPtr = outlinePts;
for (sp = screenPts, send = sp + (nScreenPts - 1); sp < send; sp++) {
segPtr->p = sp[0];
segPtr->q = sp[1];
if (Blt_LineRectClip(&extents, &segPtr->p, &segPtr->q)) {
segPtr++;
}
}
pmPtr->nOutlinePts = segPtr - outlinePts;
pmPtr->outlinePts = outlinePts;
if (pmPtr->nOutlinePts > 0) {
markerPtr->clipped = FALSE;
}
}
pmPtr->screenPts = screenPts;
}
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