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Annot.cc
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//========================================================================
//
// Annot.cc
//
// Copyright 2000-2003 Glyph & Cog, LLC
//
//========================================================================
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
#include <stdlib.h>
#include <math.h>
#include "gmem.h"
#include "GList.h"
#include "Error.h"
#include "Object.h"
#include "Catalog.h"
#include "Gfx.h"
#include "GfxFont.h"
#include "Lexer.h"
#include "PDFDoc.h"
#include "OptionalContent.h"
#include "Form.h"
#include "Annot.h"
// the MSVC math.h doesn't define this
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
//------------------------------------------------------------------------
#define annotFlagHidden 0x0002
#define annotFlagPrint 0x0004
#define annotFlagNoView 0x0020
// distance of Bezier control point from center for circle approximation
// = (4 * (sqrt(2) - 1) / 3) * r
#define bezierCircle 0.55228475
#define lineEndSize1 6
#define lineEndSize2 10
#define lineArrowAngle (M_PI / 6)
//------------------------------------------------------------------------
// AnnotBorderStyle
//------------------------------------------------------------------------
AnnotBorderStyle::AnnotBorderStyle(AnnotBorderType typeA, double widthA,
double *dashA, int dashLengthA,
double *colorA, int nColorCompsA) {
type = typeA;
width = widthA;
dash = dashA;
dashLength = dashLengthA;
color[0] = colorA[0];
color[1] = colorA[1];
color[2] = colorA[2];
color[3] = colorA[3];
nColorComps = nColorCompsA;
}
AnnotBorderStyle::~AnnotBorderStyle() {
if (dash) {
gfree(dash);
}
}
//------------------------------------------------------------------------
// Annot
//------------------------------------------------------------------------
Annot::Annot(PDFDoc *docA, Dict *dict, Ref *refA) {
Object apObj, asObj, obj1, obj2, obj3;
AnnotBorderType borderType;
double borderWidth;
double *borderDash;
int borderDashLength;
double borderColor[4];
int nBorderColorComps;
double t;
int i;
ok = gTrue;
doc = docA;
xref = doc->getXRef();
ref = *refA;
type = NULL;
appearanceState = NULL;
appearBuf = NULL;
borderStyle = NULL;
//----- parse the type
if (dict->lookup("Subtype", &obj1)->isName()) {
type = new GString(obj1.getName());
}
obj1.free();
//----- parse the rectangle
if (dict->lookup("Rect", &obj1)->isArray() &&
obj1.arrayGetLength() == 4) {
xMin = yMin = xMax = yMax = 0;
if (obj1.arrayGet(0, &obj2)->isNum()) {
xMin = obj2.getNum();
}
obj2.free();
if (obj1.arrayGet(1, &obj2)->isNum()) {
yMin = obj2.getNum();
}
obj2.free();
if (obj1.arrayGet(2, &obj2)->isNum()) {
xMax = obj2.getNum();
}
obj2.free();
if (obj1.arrayGet(3, &obj2)->isNum()) {
yMax = obj2.getNum();
}
obj2.free();
if (xMin > xMax) {
t = xMin; xMin = xMax; xMax = t;
}
if (yMin > yMax) {
t = yMin; yMin = yMax; yMax = t;
}
} else {
error(errSyntaxError, -1, "Bad bounding box for annotation");
ok = gFalse;
}
obj1.free();
//----- parse the flags
if (dict->lookup("F", &obj1)->isInt()) {
flags = obj1.getInt();
} else {
flags = 0;
}
obj1.free();
//----- parse the border style
borderType = annotBorderSolid;
borderWidth = 1;
borderDash = NULL;
borderDashLength = 0;
nBorderColorComps = 3;
borderColor[0] = 0;
borderColor[1] = 0;
borderColor[2] = 1;
borderColor[3] = 0;
if (dict->lookup("BS", &obj1)->isDict()) {
if (obj1.dictLookup("S", &obj2)->isName()) {
if (obj2.isName("S")) {
borderType = annotBorderSolid;
} else if (obj2.isName("D")) {
borderType = annotBorderDashed;
} else if (obj2.isName("B")) {
borderType = annotBorderBeveled;
} else if (obj2.isName("I")) {
borderType = annotBorderInset;
} else if (obj2.isName("U")) {
borderType = annotBorderUnderlined;
}
}
obj2.free();
if (obj1.dictLookup("W", &obj2)->isNum()) {
borderWidth = obj2.getNum();
}
obj2.free();
if (obj1.dictLookup("D", &obj2)->isArray()) {
borderDashLength = obj2.arrayGetLength();
borderDash = (double *)gmallocn(borderDashLength, sizeof(double));
for (i = 0; i < borderDashLength; ++i) {
if (obj2.arrayGet(i, &obj3)->isNum()) {
borderDash[i] = obj3.getNum();
} else {
borderDash[i] = 1;
}
obj3.free();
}
}
obj2.free();
} else {
obj1.free();
if (dict->lookup("Border", &obj1)->isArray()) {
if (obj1.arrayGetLength() >= 3) {
if (obj1.arrayGet(2, &obj2)->isNum()) {
borderWidth = obj2.getNum();
}
obj2.free();
if (obj1.arrayGetLength() >= 4) {
if (obj1.arrayGet(3, &obj2)->isArray()) {
borderType = annotBorderDashed;
borderDashLength = obj2.arrayGetLength();
borderDash = (double *)gmallocn(borderDashLength, sizeof(double));
for (i = 0; i < borderDashLength; ++i) {
if (obj2.arrayGet(i, &obj3)->isNum()) {
borderDash[i] = obj3.getNum();
} else {
borderDash[i] = 1;
}
obj3.free();
}
} else {
// Adobe draws no border at all if the last element is of
// the wrong type.
borderWidth = 0;
}
obj2.free();
}
} else {
// an empty Border array also means "no border"
borderWidth = 0;
}
}
}
obj1.free();
if (dict->lookup("C", &obj1)->isArray() &&
(obj1.arrayGetLength() == 1 ||
obj1.arrayGetLength() == 3 ||
obj1.arrayGetLength() == 4)) {
nBorderColorComps = obj1.arrayGetLength();
for (i = 0; i < nBorderColorComps; ++i) {
if (obj1.arrayGet(i, &obj2)->isNum()) {
borderColor[i] = obj2.getNum();
} else {
borderColor[i] = 0;
}
obj2.free();
}
}
obj1.free();
borderStyle = new AnnotBorderStyle(borderType, borderWidth,
borderDash, borderDashLength,
borderColor, nBorderColorComps);
//----- get the appearance state
dict->lookup("AP", &apObj);
dict->lookup("AS", &asObj);
if (asObj.isName()) {
appearanceState = new GString(asObj.getName());
} else if (apObj.isDict()) {
apObj.dictLookup("N", &obj1);
if (obj1.isDict() && obj1.dictGetLength() == 1) {
appearanceState = new GString(obj1.dictGetKey(0));
}
obj1.free();
}
if (!appearanceState) {
appearanceState = new GString("Off");
}
asObj.free();
//----- get the annotation appearance
if (apObj.isDict()) {
apObj.dictLookup("N", &obj1);
apObj.dictLookupNF("N", &obj2);
if (obj1.isDict()) {
if (obj1.dictLookupNF(appearanceState->getCString(), &obj3)->isRef()) {
obj3.copy(&appearance);
}
obj3.free();
} else if (obj2.isRef()) {
obj2.copy(&appearance);
}
obj1.free();
obj2.free();
}
apObj.free();
//----- get the optional content entry
dict->lookupNF("OC", &ocObj);
}
Annot::~Annot() {
if (type) {
delete type;
}
if (appearanceState) {
delete appearanceState;
}
appearance.free();
if (appearBuf) {
delete appearBuf;
}
if (borderStyle) {
delete borderStyle;
}
ocObj.free();
}
void Annot::generateAnnotAppearance() {
Object obj;
appearance.fetch(doc->getXRef(), &obj);
if (!obj.isStream()) {
if (type) {
if (!type->cmp("Line")) {
generateLineAppearance();
} else if (!type->cmp("PolyLine")) {
generatePolyLineAppearance();
} else if (!type->cmp("Polygon")) {
generatePolygonAppearance();
}
}
}
obj.free();
}
//~ this doesn't draw the caption
void Annot::generateLineAppearance() {
Object annotObj, gfxStateDict, appearDict, obj1, obj2;
MemStream *appearStream;
double x1, y1, x2, y2, dx, dy, len, w;
double lx1, ly1, lx2, ly2;
double tx1, ty1, tx2, ty2;
double ax1, ay1, ax2, ay2;
double bx1, by1, bx2, by2;
double leaderLen, leaderExtLen, leaderOffLen;
AnnotLineEndType lineEnd1, lineEnd2;
GBool fill;
if (!getObject(&annotObj)->isDict()) {
annotObj.free();
return;
}
appearBuf = new GString();
//----- check for transparency
if (annotObj.dictLookup("CA", &obj1)->isNum()) {
gfxStateDict.initDict(doc->getXRef());
gfxStateDict.dictAdd(copyString("ca"), obj1.copy(&obj2));
appearBuf->append("/GS1 gs\n");
}
obj1.free();
//----- set line style, colors
setLineStyle(borderStyle, &w);
setStrokeColor(borderStyle->getColor(), borderStyle->getNumColorComps());
fill = gFalse;
if (annotObj.dictLookup("IC", &obj1)->isArray()) {
if (setFillColor(&obj1)) {
fill = gTrue;
}
}
obj1.free();
//----- get line properties
if (annotObj.dictLookup("L", &obj1)->isArray() &&
obj1.arrayGetLength() == 4) {
if (obj1.arrayGet(0, &obj2)->isNum()) {
x1 = obj2.getNum();
} else {
obj2.free();
obj1.free();
goto err1;
}
obj2.free();
if (obj1.arrayGet(1, &obj2)->isNum()) {
y1 = obj2.getNum();
} else {
obj2.free();
obj1.free();
goto err1;
}
obj2.free();
if (obj1.arrayGet(2, &obj2)->isNum()) {
x2 = obj2.getNum();
} else {
obj2.free();
obj1.free();
goto err1;
}
obj2.free();
if (obj1.arrayGet(3, &obj2)->isNum()) {
y2 = obj2.getNum();
} else {
obj2.free();
obj1.free();
goto err1;
}
obj2.free();
} else {
obj1.free();
goto err1;
}
obj1.free();
lineEnd1 = lineEnd2 = annotLineEndNone;
if (annotObj.dictLookup("LE", &obj1)->isArray() &&
obj1.arrayGetLength() == 2) {
lineEnd1 = parseLineEndType(obj1.arrayGet(0, &obj2));
obj2.free();
lineEnd2 = parseLineEndType(obj1.arrayGet(1, &obj2));
obj2.free();
}
obj1.free();
if (annotObj.dictLookup("LL", &obj1)->isNum()) {
leaderLen = obj1.getNum();
} else {
leaderLen = 0;
}
obj1.free();
if (annotObj.dictLookup("LLE", &obj1)->isNum()) {
leaderExtLen = obj1.getNum();
} else {
leaderExtLen = 0;
}
obj1.free();
if (annotObj.dictLookup("LLO", &obj1)->isNum()) {
leaderOffLen = obj1.getNum();
} else {
leaderOffLen = 0;
}
obj1.free();
//----- compute positions
x1 -= xMin;
y1 -= yMin;
x2 -= xMin;
y2 -= yMin;
dx = x2 - x1;
dy = y2 - y1;
len = sqrt(dx*dx + dy*dy);
if (len > 0) {
dx /= len;
dy /= len;
}
if (leaderLen != 0) {
ax1 = x1 + leaderOffLen * dy;
ay1 = y1 - leaderOffLen * dx;
lx1 = ax1 + leaderLen * dy;
ly1 = ay1 - leaderLen * dx;
bx1 = lx1 + leaderExtLen * dy;
by1 = ly1 - leaderExtLen * dx;
ax2 = x2 + leaderOffLen * dy;
ay2 = y2 - leaderOffLen * dx;
lx2 = ax2 + leaderLen * dy;
ly2 = ay2 - leaderLen * dx;
bx2 = lx2 + leaderExtLen * dy;
by2 = ly2 - leaderExtLen * dx;
} else {
lx1 = x1;
ly1 = y1;
lx2 = x2;
ly2 = y2;
ax1 = ay1 = ax2 = ay2 = 0; // make gcc happy
bx1 = by1 = bx2 = by2 = 0;
}
adjustLineEndpoint(lineEnd1, lx1, ly1, dx, dy, w, &tx1, &ty1);
adjustLineEndpoint(lineEnd2, lx2, ly2, -dx, -dy, w, &tx2, &ty2);
//----- draw leaders
if (leaderLen != 0) {
appearBuf->appendf("{0:.4f} {1:.4f} m {2:.4f} {3:.4f} l\n",
ax1, ay1, bx1, by1);
appearBuf->appendf("{0:.4f} {1:.4f} m {2:.4f} {3:.4f} l\n",
ax2, ay2 , bx2, by2);
}
//----- draw the line
appearBuf->appendf("{0:.4f} {1:.4f} m {2:.4f} {3:.4f} l\n",
tx1, ty1, tx2, ty2);
appearBuf->append("S\n");
//----- draw the arrows
if (borderStyle->getType() == annotBorderDashed) {
appearBuf->append("[] 0 d\n");
}
drawLineArrow(lineEnd1, lx1, ly1, dx, dy, w, fill);
drawLineArrow(lineEnd2, lx2, ly2, -dx, -dy, w, fill);
//----- build the appearance stream dictionary
appearDict.initDict(doc->getXRef());
appearDict.dictAdd(copyString("Length"),
obj1.initInt(appearBuf->getLength()));
appearDict.dictAdd(copyString("Subtype"), obj1.initName("Form"));
obj1.initArray(doc->getXRef());
obj1.arrayAdd(obj2.initReal(0));
obj1.arrayAdd(obj2.initReal(0));
obj1.arrayAdd(obj2.initReal(xMax - xMin));
obj1.arrayAdd(obj2.initReal(yMax - yMin));
appearDict.dictAdd(copyString("BBox"), &obj1);
if (gfxStateDict.isDict()) {
obj1.initDict(doc->getXRef());
obj2.initDict(doc->getXRef());
obj2.dictAdd(copyString("GS1"), &gfxStateDict);
obj1.dictAdd(copyString("ExtGState"), &obj2);
appearDict.dictAdd(copyString("Resources"), &obj1);
}
//----- build the appearance stream
appearStream = new MemStream(appearBuf->getCString(), 0,
appearBuf->getLength(), &appearDict);
appearance.free();
appearance.initStream(appearStream);
err1:
annotObj.free();
}
//~ this doesn't handle line ends (arrows)
void Annot::generatePolyLineAppearance() {
Object annotObj, gfxStateDict, appearDict, obj1, obj2;
MemStream *appearStream;
double x1, y1, w;
int i;
if (!getObject(&annotObj)->isDict()) {
annotObj.free();
return;
}
appearBuf = new GString();
//----- check for transparency
if (annotObj.dictLookup("CA", &obj1)->isNum()) {
gfxStateDict.initDict(doc->getXRef());
gfxStateDict.dictAdd(copyString("ca"), obj1.copy(&obj2));
appearBuf->append("/GS1 gs\n");
}
obj1.free();
//----- set line style, colors
setLineStyle(borderStyle, &w);
setStrokeColor(borderStyle->getColor(), borderStyle->getNumColorComps());
// fill = gFalse;
// if (annotObj.dictLookup("IC", &obj1)->isArray()) {
// if (setFillColor(&obj1)) {
// fill = gTrue;
// }
// }
// obj1.free();
//----- draw line
if (!annotObj.dictLookup("Vertices", &obj1)->isArray()) {
obj1.free();
goto err1;
}
for (i = 0; i+1 < obj1.arrayGetLength(); i += 2) {
if (!obj1.arrayGet(i, &obj2)->isNum()) {
obj2.free();
obj1.free();
goto err1;
}
x1 = obj2.getNum();
obj2.free();
if (!obj1.arrayGet(i+1, &obj2)->isNum()) {
obj2.free();
obj1.free();
goto err1;
}
y1 = obj2.getNum();
obj2.free();
x1 -= xMin;
y1 -= yMin;
if (i == 0) {
appearBuf->appendf("{0:.4f} {1:.4f} m\n", x1, y1);
} else {
appearBuf->appendf("{0:.4f} {1:.4f} l\n", x1, y1);
}
}
appearBuf->append("S\n");
obj1.free();
//----- build the appearance stream dictionary
appearDict.initDict(doc->getXRef());
appearDict.dictAdd(copyString("Length"),
obj1.initInt(appearBuf->getLength()));
appearDict.dictAdd(copyString("Subtype"), obj1.initName("Form"));
obj1.initArray(doc->getXRef());
obj1.arrayAdd(obj2.initReal(0));
obj1.arrayAdd(obj2.initReal(0));
obj1.arrayAdd(obj2.initReal(xMax - xMin));
obj1.arrayAdd(obj2.initReal(yMax - yMin));
appearDict.dictAdd(copyString("BBox"), &obj1);
if (gfxStateDict.isDict()) {
obj1.initDict(doc->getXRef());
obj2.initDict(doc->getXRef());
obj2.dictAdd(copyString("GS1"), &gfxStateDict);
obj1.dictAdd(copyString("ExtGState"), &obj2);
appearDict.dictAdd(copyString("Resources"), &obj1);
}
//----- build the appearance stream
appearStream = new MemStream(appearBuf->getCString(), 0,
appearBuf->getLength(), &appearDict);
appearance.free();
appearance.initStream(appearStream);
err1:
annotObj.free();
}
void Annot::generatePolygonAppearance() {
Object annotObj, gfxStateDict, appearDict, obj1, obj2;
MemStream *appearStream;
double x1, y1;
int i;
if (!getObject(&annotObj)->isDict()) {
annotObj.free();
return;
}
appearBuf = new GString();
//----- check for transparency
if (annotObj.dictLookup("CA", &obj1)->isNum()) {
gfxStateDict.initDict(doc->getXRef());
gfxStateDict.dictAdd(copyString("ca"), obj1.copy(&obj2));
appearBuf->append("/GS1 gs\n");
}
obj1.free();
//----- set fill color
if (!annotObj.dictLookup("IC", &obj1)->isArray() ||
!setFillColor(&obj1)) {
obj1.free();
goto err1;
}
obj1.free();
//----- fill polygon
if (!annotObj.dictLookup("Vertices", &obj1)->isArray()) {
obj1.free();
goto err1;
}
for (i = 0; i+1 < obj1.arrayGetLength(); i += 2) {
if (!obj1.arrayGet(i, &obj2)->isNum()) {
obj2.free();
obj1.free();
goto err1;
}
x1 = obj2.getNum();
obj2.free();
if (!obj1.arrayGet(i+1, &obj2)->isNum()) {
obj2.free();
obj1.free();
goto err1;
}
y1 = obj2.getNum();
obj2.free();
x1 -= xMin;
y1 -= yMin;
if (i == 0) {
appearBuf->appendf("{0:.4f} {1:.4f} m\n", x1, y1);
} else {
appearBuf->appendf("{0:.4f} {1:.4f} l\n", x1, y1);
}
}
appearBuf->append("f\n");
obj1.free();
//----- build the appearance stream dictionary
appearDict.initDict(doc->getXRef());
appearDict.dictAdd(copyString("Length"),
obj1.initInt(appearBuf->getLength()));
appearDict.dictAdd(copyString("Subtype"), obj1.initName("Form"));
obj1.initArray(doc->getXRef());
obj1.arrayAdd(obj2.initReal(0));
obj1.arrayAdd(obj2.initReal(0));
obj1.arrayAdd(obj2.initReal(xMax - xMin));
obj1.arrayAdd(obj2.initReal(yMax - yMin));
appearDict.dictAdd(copyString("BBox"), &obj1);
if (gfxStateDict.isDict()) {
obj1.initDict(doc->getXRef());
obj2.initDict(doc->getXRef());
obj2.dictAdd(copyString("GS1"), &gfxStateDict);
obj1.dictAdd(copyString("ExtGState"), &obj2);
appearDict.dictAdd(copyString("Resources"), &obj1);
}
//----- build the appearance stream
appearStream = new MemStream(appearBuf->getCString(), 0,
appearBuf->getLength(), &appearDict);
appearance.free();
appearance.initStream(appearStream);
err1:
annotObj.free();
}
void Annot::setLineStyle(AnnotBorderStyle *bs, double *lineWidth) {
double *dash;
double w;
int dashLength, i;
if ((w = borderStyle->getWidth()) <= 0) {
w = 0.1;
}
*lineWidth = w;
appearBuf->appendf("{0:.4f} w\n", w);
// this treats beveled/inset/underline as solid
if (borderStyle->getType() == annotBorderDashed) {
borderStyle->getDash(&dash, &dashLength);
appearBuf->append("[");
for (i = 0; i < dashLength; ++i) {
appearBuf->appendf(" {0:.4f}", dash[i]);
}
appearBuf->append("] 0 d\n");
}
appearBuf->append("0 j\n0 J\n");
}
void Annot::setStrokeColor(double *color, int nComps) {
switch (nComps) {
case 0:
appearBuf->append("0 G\n");
break;
case 1:
appearBuf->appendf("{0:.2f} G\n", color[0]);
break;
case 3:
appearBuf->appendf("{0:.2f} {1:.2f} {2:.2f} RG\n",
color[0], color[1], color[2]);
break;
case 4:
appearBuf->appendf("{0:.2f} {1:.2f} {2:.2f} {3:.2f} K\n",
color[0], color[1], color[2], color[3]);
break;
}
}
GBool Annot::setFillColor(Object *colorObj) {
Object obj;
double color[4];
int i;
if (!colorObj->isArray()) {
return gFalse;
}
for (i = 0; i < colorObj->arrayGetLength(); ++i) {
if (colorObj->arrayGet(i, &obj)->isNum()) {
color[i] = obj.getNum();
} else {
color[i] = 0;
}
obj.free();
}
switch (colorObj->arrayGetLength()) {
case 1:
appearBuf->appendf("{0:.2f} g\n", color[0]);
return gTrue;
case 3:
appearBuf->appendf("{0:.2f} {1:.2f} {2:.2f} rg\n",
color[0], color[1], color[2]);
return gTrue;
case 4:
appearBuf->appendf("{0:.2f} {1:.2f} {2:.2f} {3:.3f} k\n",
color[0], color[1],
color[2], color[3]);
return gTrue;
}
return gFalse;
}
AnnotLineEndType Annot::parseLineEndType(Object *obj) {
if (obj->isName("None")) {
return annotLineEndNone;
} else if (obj->isName("Square")) {
return annotLineEndSquare;
} else if (obj->isName("Circle")) {
return annotLineEndCircle;
} else if (obj->isName("Diamond")) {
return annotLineEndDiamond;
} else if (obj->isName("OpenArrow")) {
return annotLineEndOpenArrow;
} else if (obj->isName("ClosedArrow")) {
return annotLineEndClosedArrow;
} else if (obj->isName("Butt")) {
return annotLineEndButt;
} else if (obj->isName("ROpenArrow")) {
return annotLineEndROpenArrow;
} else if (obj->isName("RClosedArrow")) {
return annotLineEndRClosedArrow;
} else if (obj->isName("Slash")) {
return annotLineEndSlash;
} else {
return annotLineEndNone;
}
}
void Annot::adjustLineEndpoint(AnnotLineEndType lineEnd,
double x, double y, double dx, double dy,
double w, double *tx, double *ty) {
switch (lineEnd) {
case annotLineEndNone:
w = 0;
break;
case annotLineEndSquare:
w *= lineEndSize1;
break;
case annotLineEndCircle:
w *= lineEndSize1;
break;
case annotLineEndDiamond:
w *= lineEndSize1;
break;
case annotLineEndOpenArrow:
w = 0;
break;
case annotLineEndClosedArrow:
w *= lineEndSize2 * cos(lineArrowAngle);
break;
case annotLineEndButt:
w = 0;
break;
case annotLineEndROpenArrow:
w *= lineEndSize2 * cos(lineArrowAngle);
break;
case annotLineEndRClosedArrow:
w *= lineEndSize2 * cos(lineArrowAngle);
break;
case annotLineEndSlash:
w = 0;
break;
}
*tx = x + w * dx;
*ty = y + w * dy;
}
void Annot::drawLineArrow(AnnotLineEndType lineEnd,
double x, double y, double dx, double dy,
double w, GBool fill) {
switch (lineEnd) {
case annotLineEndNone:
break;
case annotLineEndSquare:
w *= lineEndSize1;
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
x + w*dx + 0.5*w*dy,
y + w*dy - 0.5*w*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + 0.5*w*dy,
y - 0.5*w*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x - 0.5*w*dy,
y + 0.5*w*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + w*dx - 0.5*w*dy,
y + w*dy + 0.5*w*dx);
appearBuf->append(fill ? "b\n" : "s\n");
break;
case annotLineEndCircle:
w *= lineEndSize1;
drawCircle(x + 0.5*w*dx, y + 0.5*w*dy, 0.5*w, fill ? "b" : "s");
break;
case annotLineEndDiamond:
w *= lineEndSize1;
appearBuf->appendf("{0:.4f} {1:.4f} m\n", x, y);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + 0.5*w*dx - 0.5*w*dy,
y + 0.5*w*dy + 0.5*w*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + w*dx,
y + w*dy);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + 0.5*w*dx + 0.5*w*dy,
y + 0.5*w*dy - 0.5*w*dx);
appearBuf->append(fill ? "b\n" : "s\n");
break;
case annotLineEndOpenArrow:
w *= lineEndSize2;
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
x + w*cos(lineArrowAngle)*dx + w*sin(lineArrowAngle)*dy,
y + w*cos(lineArrowAngle)*dy - w*sin(lineArrowAngle)*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n", x, y);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + w*cos(lineArrowAngle)*dx - w*sin(lineArrowAngle)*dy,
y + w*cos(lineArrowAngle)*dy + w*sin(lineArrowAngle)*dx);
appearBuf->append("S\n");
break;
case annotLineEndClosedArrow:
w *= lineEndSize2;
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
x + w*cos(lineArrowAngle)*dx + w*sin(lineArrowAngle)*dy,
y + w*cos(lineArrowAngle)*dy - w*sin(lineArrowAngle)*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n", x, y);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + w*cos(lineArrowAngle)*dx - w*sin(lineArrowAngle)*dy,
y + w*cos(lineArrowAngle)*dy + w*sin(lineArrowAngle)*dx);
appearBuf->append(fill ? "b\n" : "s\n");
break;
case annotLineEndButt:
w *= lineEndSize1;
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
x + 0.5*w*dy,
y - 0.5*w*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x - 0.5*w*dy,
y + 0.5*w*dx);
appearBuf->append("S\n");
break;
case annotLineEndROpenArrow:
w *= lineEndSize2;
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
x + w*sin(lineArrowAngle)*dy,
y - w*sin(lineArrowAngle)*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + w*cos(lineArrowAngle)*dx,
y + w*cos(lineArrowAngle)*dy);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x - w*sin(lineArrowAngle)*dy,
y + w*sin(lineArrowAngle)*dx);
appearBuf->append("S\n");
break;
case annotLineEndRClosedArrow:
w *= lineEndSize2;
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
x + w*sin(lineArrowAngle)*dy,
y - w*sin(lineArrowAngle)*dx);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x + w*cos(lineArrowAngle)*dx,
y + w*cos(lineArrowAngle)*dy);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x - w*sin(lineArrowAngle)*dy,
y + w*sin(lineArrowAngle)*dx);
appearBuf->append(fill ? "b\n" : "s\n");
break;
case annotLineEndSlash:
w *= lineEndSize1;
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
x + 0.5*w*cos(lineArrowAngle)*dy
- 0.5*w*sin(lineArrowAngle)*dx,
y - 0.5*w*cos(lineArrowAngle)*dx
- 0.5*w*sin(lineArrowAngle)*dy);
appearBuf->appendf("{0:.4f} {1:.4f} l\n",
x - 0.5*w*cos(lineArrowAngle)*dy
+ 0.5*w*sin(lineArrowAngle)*dx,
y + 0.5*w*cos(lineArrowAngle)*dx
+ 0.5*w*sin(lineArrowAngle)*dy);
appearBuf->append("S\n");
break;
}
}
// Draw an (approximate) circle of radius <r> centered at (<cx>, <cy>).
// <cmd> is used to draw the circle ("f", "s", or "b").
void Annot::drawCircle(double cx, double cy, double r, const char *cmd) {
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
cx + r, cy);
appearBuf->appendf("{0:.4f} {1:.4f} {2:.4f} {3:.4f} {4:.4f} {5:.4f} c\n",
cx + r, cy + bezierCircle * r,
cx + bezierCircle * r, cy + r,
cx, cy + r);
appearBuf->appendf("{0:.4f} {1:.4f} {2:.4f} {3:.4f} {4:.4f} {5:.4f} c\n",
cx - bezierCircle * r, cy + r,
cx - r, cy + bezierCircle * r,
cx - r, cy);
appearBuf->appendf("{0:.4f} {1:.4f} {2:.4f} {3:.4f} {4:.4f} {5:.4f} c\n",
cx - r, cy - bezierCircle * r,
cx - bezierCircle * r, cy - r,
cx, cy - r);
appearBuf->appendf("{0:.4f} {1:.4f} {2:.4f} {3:.4f} {4:.4f} {5:.4f} c\n",
cx + bezierCircle * r, cy - r,
cx + r, cy - bezierCircle * r,
cx + r, cy);
appearBuf->appendf("{0:s}\n", cmd);
}
// Draw the top-left half of an (approximate) circle of radius <r>
// centered at (<cx>, <cy>).
void Annot::drawCircleTopLeft(double cx, double cy, double r) {
double r2;
r2 = r / sqrt(2.0);
appearBuf->appendf("{0:.4f} {1:.4f} m\n",
cx + r2, cy + r2);
appearBuf->appendf("{0:.4f} {1:.4f} {2:.4f} {3:.4f} {4:.4f} {5:.4f} c\n",
cx + (1 - bezierCircle) * r2,
cy + (1 + bezierCircle) * r2,
cx - (1 - bezierCircle) * r2,
cy + (1 + bezierCircle) * r2,
cx - r2,
cy + r2);
appearBuf->appendf("{0:.4f} {1:.4f} {2:.4f} {3:.4f} {4:.4f} {5:.4f} c\n",
cx - (1 + bezierCircle) * r2,
cy + (1 - bezierCircle) * r2,
cx - (1 + bezierCircle) * r2,
cy - (1 - bezierCircle) * r2,
cx - r2,
cy - r2);
appearBuf->append("S\n");
}
// Draw the bottom-right half of an (approximate) circle of radius <r>
// centered at (<cx>, <cy>).
void Annot::drawCircleBottomRight(double cx, double cy, double r) {
double r2;