Initial revision

1 files changed, 1573 insertions, 0 deletions

diff --git a/pdf/xpdf/Gfx.cc b/pdf/xpdf/Gfx.cc
new file mode 100644
index 0000000..d58ddd8
--- /dev/null
+++ b/pdf/xpdf/Gfx.cc
@@ -0,0 +1,1573 @@
+//========================================================================
+//
+// Gfx.cc
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifdef __GNUC__
+#pragma implementation
+#endif
+
+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include "gmem.h"
+#include "Object.h"
+#include "Array.h"
+#include "Dict.h"
+#include "Stream.h"
+#include "Lexer.h"
+#include "Parser.h"
+#include "GfxFont.h"
+#include "GfxState.h"
+#include "OutputDev.h"
+#include "Params.h"
+#include "Error.h"
+#include "Gfx.h"
+
+//------------------------------------------------------------------------
+// Operator table
+//------------------------------------------------------------------------
+
+Operator Gfx::opTab[] = {
+  {"\"",  3, {tchkNum,    tchkNum,    tchkString},
+          &Gfx::opMoveSetShowText},
+  {"'",   1, {tchkString},
+          &Gfx::opMoveShowText},
+  {"B",   0, {tchkNone},
+          &Gfx::opFillStroke},
+  {"B*",  0, {tchkNone},
+          &Gfx::opEOFillStroke},
+  {"BDC", 2, {tchkName,   tchkProps},
+          &Gfx::opBeginMarkedContent},
+  {"BI",  0, {tchkNone},
+          &Gfx::opBeginImage},
+  {"BMC", 1, {tchkName},
+          &Gfx::opBeginMarkedContent},
+  {"BT",  0, {tchkNone},
+          &Gfx::opBeginText},
+  {"BX",  0, {tchkNone},
+          &Gfx::opBeginIgnoreUndef},
+  {"CS",  1, {tchkName},
+          &Gfx::opSetStrokeColorSpace},
+  {"DP",  2, {tchkName,   tchkProps},
+          &Gfx::opMarkPoint},
+  {"Do",  1, {tchkName},
+          &Gfx::opXObject},
+  {"EI",  0, {tchkNone},
+          &Gfx::opEndImage},
+  {"EMC", 0, {tchkNone},
+          &Gfx::opEndMarkedContent},
+  {"ET",  0, {tchkNone},
+          &Gfx::opEndText},
+  {"EX",  0, {tchkNone},
+          &Gfx::opEndIgnoreUndef},
+  {"F",   0, {tchkNone},
+          &Gfx::opFill},
+  {"G",   1, {tchkNum},
+          &Gfx::opSetStrokeGray},
+  {"ID",  0, {tchkNone},
+          &Gfx::opImageData},
+  {"J",   1, {tchkInt},
+          &Gfx::opSetLineCap},
+  {"K",   4, {tchkNum,    tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opSetStrokeCMYKColor},
+  {"M",   1, {tchkNum},
+          &Gfx::opSetMiterLimit},
+  {"MP",  1, {tchkName},
+          &Gfx::opMarkPoint},
+  {"Q",   0, {tchkNone},
+          &Gfx::opRestore},
+  {"RG",  3, {tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opSetStrokeRGBColor},
+  {"S",   0, {tchkNone},
+          &Gfx::opStroke},
+  {"SC",  -4, {tchkNum,   tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opSetStrokeColor},
+  {"SCN", -5, {tchkSCN,   tchkSCN,    tchkSCN,    tchkSCN,
+	       tchkSCN},
+          &Gfx::opSetStrokeColorN},
+  {"T*",  0, {tchkNone},
+          &Gfx::opTextNextLine},
+  {"TD",  2, {tchkNum,    tchkNum},
+          &Gfx::opTextMoveSet},
+  {"TJ",  1, {tchkArray},
+          &Gfx::opShowSpaceText},
+  {"TL",  1, {tchkNum},
+          &Gfx::opSetTextLeading},
+  {"Tc",  1, {tchkNum},
+          &Gfx::opSetCharSpacing},
+  {"Td",  2, {tchkNum,    tchkNum},
+          &Gfx::opTextMove},
+  {"Tf",  2, {tchkName,   tchkNum},
+          &Gfx::opSetFont},
+  {"Tj",  1, {tchkString},
+          &Gfx::opShowText},
+  {"Tm",  6, {tchkNum,    tchkNum,    tchkNum,    tchkNum,
+	      tchkNum,    tchkNum},
+          &Gfx::opSetTextMatrix},
+  {"Tr",  1, {tchkInt},
+          &Gfx::opSetTextRender},
+  {"Ts",  1, {tchkNum},
+          &Gfx::opSetTextRise},
+  {"Tw",  1, {tchkNum},
+          &Gfx::opSetWordSpacing},
+  {"Tz",  1, {tchkNum},
+          &Gfx::opSetHorizScaling},
+  {"W",   0, {tchkNone},
+          &Gfx::opClip},
+  {"W*",  0, {tchkNone},
+          &Gfx::opEOClip},
+  {"b",   0, {tchkNone},
+          &Gfx::opCloseFillStroke},
+  {"b*",  0, {tchkNone},
+          &Gfx::opCloseEOFillStroke},
+  {"c",   6, {tchkNum,    tchkNum,    tchkNum,    tchkNum,
+	      tchkNum,    tchkNum},
+          &Gfx::opCurveTo},
+  {"cm",  6, {tchkNum,    tchkNum,    tchkNum,    tchkNum,
+	      tchkNum,    tchkNum},
+          &Gfx::opConcat},
+  {"cs",  1, {tchkName},
+          &Gfx::opSetFillColorSpace},
+  {"d",   2, {tchkArray,  tchkNum},
+          &Gfx::opSetDash},
+  {"d0",  2, {tchkNum,    tchkNum},
+          &Gfx::opSetCharWidth},
+  {"d1",  6, {tchkNum,    tchkNum,    tchkNum,    tchkNum,
+	      tchkNum,    tchkNum},
+          &Gfx::opSetCacheDevice},
+  {"f",   0, {tchkNone},
+          &Gfx::opFill},
+  {"f*",  0, {tchkNone},
+          &Gfx::opEOFill},
+  {"g",   1, {tchkNum},
+          &Gfx::opSetFillGray},
+  {"gs",  1, {tchkName},
+          &Gfx::opSetExtGState},
+  {"h",   0, {tchkNone},
+          &Gfx::opClosePath},
+  {"i",   1, {tchkNum},
+          &Gfx::opSetFlat},
+  {"j",   1, {tchkInt},
+          &Gfx::opSetLineJoin},
+  {"k",   4, {tchkNum,    tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opSetFillCMYKColor},
+  {"l",   2, {tchkNum,    tchkNum},
+          &Gfx::opLineTo},
+  {"m",   2, {tchkNum,    tchkNum},
+          &Gfx::opMoveTo},
+  {"n",   0, {tchkNone},
+          &Gfx::opEndPath},
+  {"q",   0, {tchkNone},
+          &Gfx::opSave},
+  {"re",  4, {tchkNum,    tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opRectangle},
+  {"rg",  3, {tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opSetFillRGBColor},
+  {"s",   0, {tchkNone},
+          &Gfx::opCloseStroke},
+  {"sc",  -4, {tchkNum,   tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opSetFillColor},
+  {"scn", -5, {tchkSCN,   tchkSCN,    tchkSCN,    tchkSCN,
+	       tchkSCN},
+          &Gfx::opSetFillColorN},
+  {"v",   4, {tchkNum,    tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opCurveTo1},
+  {"w",   1, {tchkNum},
+          &Gfx::opSetLineWidth},
+  {"y",   4, {tchkNum,    tchkNum,    tchkNum,    tchkNum},
+          &Gfx::opCurveTo2},
+};
+
+#define numOps (sizeof(opTab) / sizeof(Operator))
+
+//------------------------------------------------------------------------
+// Gfx
+//------------------------------------------------------------------------
+
+Gfx::Gfx(OutputDev *out1, int pageNum, Dict *resDict,
+	 int dpi, double x1, double y1, double x2, double y2, GBool crop,
+	 double cropX1, double cropY1, double cropX2, double cropY2,
+	 int rotate) {
+  Object obj1;
+
+  // start the resource stack
+  res = new GfxResources(NULL);
+
+  // build font dictionary
+  res->fonts = NULL;
+  if (resDict) {
+    resDict->lookup("Font", &obj1);
+    if (obj1.isDict())
+      res->fonts = new GfxFontDict(obj1.getDict());
+    obj1.free();
+  }
+
+  // get XObject dictionary
+  if (resDict)
+    resDict->lookup("XObject", &res->xObjDict);
+  else
+    res->xObjDict.initNull();
+
+  // get colorspace dictionary
+  if (resDict)
+    resDict->lookup("ColorSpace", &res->colorSpaceDict);
+  else
+    res->colorSpaceDict.initNull();
+
+  // initialize
+  out = out1;
+  state = new GfxState(dpi, x1, y1, x2, y2, rotate, out->upsideDown());
+  fontChanged = gFalse;
+  clip = clipNone;
+  ignoreUndef = 0;
+  out->startPage(pageNum, state);
+  out->setDefaultCTM(state->getCTM());
+  out->updateAll(state);
+
+  // set crop box
+  if (crop) {
+    state->moveTo(cropX1, cropY1);
+    state->lineTo(cropX2, cropY1);
+    state->lineTo(cropX2, cropY2);
+    state->lineTo(cropX1, cropY2);
+    state->closePath();
+    out->clip(state);
+    state->clearPath();
+  }
+}
+
+Gfx::~Gfx() {
+  GfxResources *resPtr;
+
+  while (state->hasSaves()) {
+    state = state->restore();
+    out->restoreState(state);
+  }
+  out->endPage();
+  while (res) {
+    resPtr = res->next;
+    delete res;
+    res = resPtr;
+  }
+  if (state)
+    delete state;
+}
+
+GfxResources::~GfxResources() {
+  if (fonts)
+    delete fonts;
+  xObjDict.free();
+  colorSpaceDict.free();
+}
+
+void Gfx::display(Object *obj) {
+  Object obj2;
+  int i;
+
+  if (obj->isArray()) {
+    for (i = 0; i < obj->arrayGetLength(); ++i) {
+      obj->arrayGet(i, &obj2);
+      if (!obj2.isStream()) {
+	error(-1, "Weird page contents");
+	obj2.free();
+	return;
+      }
+      obj2.free();
+    }
+  } else if (!obj->isStream()) {
+    error(-1, "Weird page contents");
+    return;
+  }
+  parser = new Parser(new Lexer(obj));
+  go();
+}
+
+void Gfx::go() {
+  Object obj;
+  Object args[maxArgs];
+  int numCmds, numArgs;
+  int i;
+
+  // scan a sequence of objects
+  numCmds = 0;
+  numArgs = 0;
+  parser->getObj(&obj);
+  while (!obj.isEOF()) {
+
+    // got a command - execute it
+    if (obj.isCmd()) {
+      if (printCommands) {
+	obj.print(stdout);
+	for (i = 0; i < numArgs; ++i) {
+	  printf(" ");
+	  args[i].print(stdout);
+	}
+	printf("\n");
+      }
+      execOp(&obj, args, numArgs);
+      obj.free();
+      for (i = 0; i < numArgs; ++i)
+	args[i].free();
+      numArgs = 0;
+
+      // periodically update display
+      if (++numCmds == 200) {
+	out->dump();
+	numCmds = 0;
+      }
+
+    // got an argument - save it
+    } else if (numArgs < maxArgs) {
+      args[numArgs++] = obj;
+
+    // too many arguments - something is wrong
+    } else {
+      error(getPos(), "Too many args in content stream");
+      if (printCommands) {
+	printf("throwing away arg: ");
+	obj.print(stdout);
+	printf("\n");
+      }
+      obj.free();
+    }
+
+    // grab the next object
+    parser->getObj(&obj);
+  }
+  obj.free();
+
+  // args at end with no command
+  if (numArgs > 0) {
+    error(getPos(), "Leftover args in content stream");
+    if (printCommands) {
+      printf("%d leftovers:", numArgs);
+      for (i = 0; i < numArgs; ++i) {
+	printf(" ");
+	args[i].print(stdout);
+      }
+      printf("\n");
+    }
+    for (i = 0; i < numArgs; ++i)
+      args[i].free();
+  }
+
+  // update display
+  if (numCmds > 0)
+    out->dump();
+
+  // clean up
+  if (parser)
+    delete parser;
+  if (printCommands)
+    fflush(stdout);
+}
+
+void Gfx::execOp(Object *cmd, Object args[], int numArgs) {
+  Operator *op;
+  char *name;
+  int i;
+
+  // find operator
+  name = cmd->getName();
+  if (!(op = findOp(name))) {
+    if (ignoreUndef == 0)
+      error(getPos(), "Unknown operator '%s'", name);
+    return;
+  }
+
+  // type check args
+  if (op->numArgs >= 0) {
+    if (numArgs != op->numArgs) {
+      error(getPos(), "Wrong number (%d) of args to '%s' operator",
+	    numArgs, name);
+      return;
+    }
+  } else {
+    if (numArgs > -op->numArgs) {
+      error(getPos(), "Too many (%d) args to '%s' operator",
+	    numArgs, name);
+      return;
+    }
+  }
+  for (i = 0; i < numArgs; ++i) {
+    if (!checkArg(&args[i], op->tchk[i])) {
+      error(getPos(), "Arg #%d to '%s' operator is wrong type (%s)",
+	    i, name, args[i].getTypeName());
+      return;
+    }
+  }
+
+  // do it
+  (this->*op->func)(args, numArgs);
+}
+
+Operator *Gfx::findOp(char *name) {
+  int a, b, m, cmp;
+
+  a = -1;
+  b = numOps;
+  // invariant: opTab[a] < name < opTab[b]
+  while (b - a > 1) {
+    m = (a + b) / 2;
+    cmp = strcmp(opTab[m].name, name);
+    if (cmp < 0)
+      a = m;
+    else if (cmp > 0)
+      b = m;
+    else
+      a = b = m;
+  }
+  if (cmp != 0)
+    return NULL;
+  return &opTab[a];
+}
+
+GBool Gfx::checkArg(Object *arg, TchkType type) {
+  switch (type) {
+  case tchkBool:   return arg->isBool();
+  case tchkInt:    return arg->isInt();
+  case tchkNum:    return arg->isNum();
+  case tchkString: return arg->isString();
+  case tchkName:   return arg->isName();
+  case tchkArray:  return arg->isArray();
+  case tchkProps:  return arg->isDict() || arg->isName();
+  case tchkSCN:    return arg->isNum() || arg->isName();
+  case tchkNone:   return gFalse;
+  }
+  return gFalse;
+}
+
+int Gfx::getPos() {
+  return parser->getPos();
+}
+
+GfxFont *Gfx::lookupFont(char *name) {
+  GfxFont *font;
+  GfxResources *resPtr;
+
+  for (resPtr = res; resPtr; resPtr = resPtr->next) {
+    if (resPtr->fonts) {
+      if ((font = resPtr->fonts->lookup(name)))
+	return font;
+    }
+  }
+  error(getPos(), "unknown font tag '%s'", name);
+  return NULL;
+}
+
+GBool Gfx::lookupXObject(char *name, Object *obj) {
+  GfxResources *resPtr;
+
+  for (resPtr = res; resPtr; resPtr = resPtr->next) {
+    if (resPtr->xObjDict.isDict()) {
+      if (!resPtr->xObjDict.dictLookup(name, obj)->isNull())
+	return gTrue;
+      obj->free();
+    }
+  }
+  error(getPos(), "XObject '%s' is unknown", name);
+  return gFalse;
+}
+
+void Gfx::lookupColorSpace(char *name, Object *obj) {
+  GfxResources *resPtr;
+
+  for (resPtr = res; resPtr; resPtr = resPtr->next) {
+    if (resPtr->colorSpaceDict.isDict()) {
+      if (!resPtr->colorSpaceDict.dictLookup(name, obj)->isNull())
+	return;
+      obj->free();
+    }
+  }
+  obj->initNull();
+}
+
+//------------------------------------------------------------------------
+// graphics state operators
+//------------------------------------------------------------------------
+
+void Gfx::opSave(Object args[], int numArgs) {
+  out->saveState(state);
+  state = state->save();
+}
+
+void Gfx::opRestore(Object args[], int numArgs) {
+  state = state->restore();
+  out->restoreState(state);
+}
+
+void Gfx::opConcat(Object args[], int numArgs) {
+  state->concatCTM(args[0].getNum(), args[1].getNum(),
+		   args[2].getNum(), args[3].getNum(),
+		   args[4].getNum(), args[5].getNum());
+  out->updateCTM(state, args[0].getNum(), args[1].getNum(),
+		 args[2].getNum(), args[3].getNum(),
+		 args[4].getNum(), args[5].getNum());
+  fontChanged = gTrue;
+}
+
+void Gfx::opSetDash(Object args[], int numArgs) {
+  Array *a;
+  int length;
+  Object obj;
+  double *dash;
+  int i;
+
+  a = args[0].getArray();
+  length = a->getLength();
+  if (length == 0) {
+    dash = NULL;
+  } else {
+    dash = (double *)gmalloc(length * sizeof(double));
+    for (i = 0; i < length; ++i) {
+      dash[i] = a->get(i, &obj)->getNum();
+      obj.free();
+    }
+  }
+  state->setLineDash(dash, length, args[1].getNum());
+  out->updateLineDash(state);
+}
+
+void Gfx::opSetFlat(Object args[], int numArgs) {
+  state->setFlatness((int)args[0].getNum());
+  out->updateFlatness(state);
+}
+
+void Gfx::opSetLineJoin(Object args[], int numArgs) {
+  state->setLineJoin(args[0].getInt());
+  out->updateLineJoin(state);
+}
+
+void Gfx::opSetLineCap(Object args[], int numArgs) {
+  state->setLineCap(args[0].getInt());
+  out->updateLineCap(state);
+}
+
+void Gfx::opSetMiterLimit(Object args[], int numArgs) {
+  state->setMiterLimit(args[0].getNum());
+  out->updateMiterLimit(state);
+}
+
+void Gfx::opSetLineWidth(Object args[], int numArgs) {
+  state->setLineWidth(args[0].getNum());
+  out->updateLineWidth(state);
+}
+
+void Gfx::opSetExtGState(Object args[], int numArgs) {
+}
+
+//------------------------------------------------------------------------
+// color operators
+//------------------------------------------------------------------------
+
+void Gfx::opSetFillGray(Object args[], int numArgs) {
+  state->setFillColorSpace(new GfxColorSpace(colorGray));
+  state->setFillGray(args[0].getNum());
+  out->updateFillColor(state);
+}
+
+void Gfx::opSetStrokeGray(Object args[], int numArgs) {
+  state->setStrokeColorSpace(new GfxColorSpace(colorGray));
+  state->setStrokeGray(args[0].getNum());
+  out->updateStrokeColor(state);
+}
+
+void Gfx::opSetFillCMYKColor(Object args[], int numArgs) {
+  state->setFillColorSpace(new GfxColorSpace(colorCMYK));
+  state->setFillCMYK(args[0].getNum(), args[1].getNum(),
+		     args[2].getNum(), args[3].getNum());
+  out->updateFillColor(state);
+}
+
+void Gfx::opSetStrokeCMYKColor(Object args[], int numArgs) {
+  state->setStrokeColorSpace(new GfxColorSpace(colorCMYK));
+  state->setStrokeCMYK(args[0].getNum(), args[1].getNum(),
+		       args[2].getNum(), args[3].getNum());
+  out->updateStrokeColor(state);
+}
+
+void Gfx::opSetFillRGBColor(Object args[], int numArgs) {
+  state->setFillColorSpace(new GfxColorSpace(colorRGB));
+  state->setFillRGB(args[0].getNum(), args[1].getNum(), args[2].getNum());
+  out->updateFillColor(state);
+}
+
+void Gfx::opSetStrokeRGBColor(Object args[], int numArgs) {
+  state->setStrokeColorSpace(new GfxColorSpace(colorRGB));
+  state->setStrokeRGB(args[0].getNum(), args[1].getNum(), args[2].getNum());
+  out->updateStrokeColor(state);
+}
+
+void Gfx::opSetFillColorSpace(Object args[], int numArgs) {
+  Object obj;
+  GfxColorSpace *colorSpace;
+  double x[4];
+
+  lookupColorSpace(args[0].getName(), &obj);
+  if (obj.isNull())
+    colorSpace = new GfxColorSpace(&args[0]);
+  else
+    colorSpace = new GfxColorSpace(&obj);
+  obj.free();
+  if (colorSpace->isOk()) {
+    state->setFillColorSpace(colorSpace);
+  } else {
+    delete colorSpace;
+    error(getPos(), "Bad colorspace");
+  }
+  x[0] = x[1] = x[2] = x[3] = 0;
+  state->setFillColor(x);
+  out->updateFillColor(state);
+}
+
+void Gfx::opSetStrokeColorSpace(Object args[], int numArgs) {
+  Object obj;
+  GfxColorSpace *colorSpace;
+  double x[4];
+
+  lookupColorSpace(args[0].getName(), &obj);
+  if (obj.isNull())
+    colorSpace = new GfxColorSpace(&args[0]);
+  else
+    colorSpace = new GfxColorSpace(&obj);
+  obj.free();
+  if (colorSpace->isOk()) {
+    state->setStrokeColorSpace(colorSpace);
+  } else {
+    delete colorSpace;
+    error(getPos(), "Bad colorspace");
+  }
+  x[0] = x[1] = x[2] = x[3] = 0;
+  state->setStrokeColor(x);
+  out->updateStrokeColor(state);
+}
+
+void Gfx::opSetFillColor(Object args[], int numArgs) {
+  double x[4];
+  int i;
+
+  x[0] = x[1] = x[2] = x[3] = 0;
+  for (i = 0; i < numArgs; ++i)
+    x[i] = args[i].getNum();
+  state->setFillColor(x);
+  out->updateFillColor(state);
+}
+
+void Gfx::opSetStrokeColor(Object args[], int numArgs) {
+  double x[4];
+  int i;
+
+  x[0] = x[1] = x[2] = x[3] = 0;
+  for (i = 0; i < numArgs; ++i)
+    x[i] = args[i].getNum();
+  state->setStrokeColor(x);
+  out->updateStrokeColor(state);
+}
+
+void Gfx::opSetFillColorN(Object args[], int numArgs) {
+  double x[4];
+  int i;
+
+  x[0] = x[1] = x[2] = x[3] = 0;
+  for (i = 0; i < numArgs && i < 4; ++i) {
+    if (args[i].isNum())
+      x[i] = args[i].getNum();
+    else
+      break;
+  }
+  state->setFillColor(x);
+  out->updateFillColor(state);
+}
+
+void Gfx::opSetStrokeColorN(Object args[], int numArgs) {
+  double x[4];
+  int i;
+
+  x[0] = x[1] = x[2] = x[3] = 0;
+  for (i = 0; i < numArgs && i < 4; ++i) {
+    if (args[i].isNum())
+      x[i] = args[i].getNum();
+    else
+      break;
+  }
+  state->setStrokeColor(x);
+  out->updateStrokeColor(state);
+}
+
+//------------------------------------------------------------------------
+// path segment operators
+//------------------------------------------------------------------------
+
+void Gfx::opMoveTo(Object args[], int numArgs) {
+  state->moveTo(args[0].getNum(), args[1].getNum());
+}
+
+void Gfx::opLineTo(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    error(getPos(), "No current point in lineto");
+    return;
+  }
+  state->lineTo(args[0].getNum(), args[1].getNum());
+}
+
+void Gfx::opCurveTo(Object args[], int numArgs) {
+  double x1, y1, x2, y2, x3, y3;
+
+  if (!state->isCurPt()) {
+    error(getPos(), "No current point in curveto");
+    return;
+  }
+  x1 = args[0].getNum();
+  y1 = args[1].getNum();
+  x2 = args[2].getNum();
+  y2 = args[3].getNum();
+  x3 = args[4].getNum();
+  y3 = args[5].getNum();
+  state->curveTo(x1, y1, x2, y2, x3, y3);
+}
+
+void Gfx::opCurveTo1(Object args[], int numArgs) {
+  double x1, y1, x2, y2, x3, y3;
+
+  if (!state->isCurPt()) {
+    error(getPos(), "No current point in curveto1");
+    return;
+  }
+  x1 = state->getCurX();
+  y1 = state->getCurY();
+  x2 = args[0].getNum();
+  y2 = args[1].getNum();
+  x3 = args[2].getNum();
+  y3 = args[3].getNum();
+  state->curveTo(x1, y1, x2, y2, x3, y3);
+}
+
+void Gfx::opCurveTo2(Object args[], int numArgs) {
+  double x1, y1, x2, y2, x3, y3;
+
+  if (!state->isCurPt()) {
+    error(getPos(), "No current point in curveto2");
+    return;
+  }
+  x1 = args[0].getNum();
+  y1 = args[1].getNum();
+  x2 = args[2].getNum();
+  y2 = args[3].getNum();
+  x3 = x2;
+  y3 = y2;
+  state->curveTo(x1, y1, x2, y2, x3, y3);
+}
+
+void Gfx::opRectangle(Object args[], int numArgs) {
+  double x, y, w, h;
+
+  x = args[0].getNum();
+  y = args[1].getNum();
+  w = args[2].getNum();
+  h = args[3].getNum();
+  state->moveTo(x, y);
+  state->lineTo(x + w, y);
+  state->lineTo(x + w, y + h);
+  state->lineTo(x, y + h);
+  state->closePath();
+}
+
+void Gfx::opClosePath(Object args[], int numArgs) {
+  if (!state->isPath()) {
+    error(getPos(), "No current point in closepath");
+    return;
+  }
+  state->closePath();
+}
+
+//------------------------------------------------------------------------
+// path painting operators
+//------------------------------------------------------------------------
+
+void Gfx::opEndPath(Object args[], int numArgs) {
+  doEndPath();
+}
+
+void Gfx::opStroke(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in stroke");
+    return;
+  }
+  if (state->isPath())
+    out->stroke(state);
+  doEndPath();
+}
+
+void Gfx::opCloseStroke(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in closepath/stroke");
+    return;
+  }
+  if (state->isPath()) {
+    state->closePath();
+    out->stroke(state);
+  }
+  doEndPath();
+}
+
+void Gfx::opFill(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in fill");
+    return;
+  }
+  if (state->isPath())
+    out->fill(state);
+  doEndPath();
+}
+
+void Gfx::opEOFill(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in eofill");
+    return;
+  }
+  if (state->isPath())
+    out->eoFill(state);
+  doEndPath();
+}
+
+void Gfx::opFillStroke(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in fill/stroke");
+    return;
+  }
+  if (state->isPath()) {
+    out->fill(state);
+    out->stroke(state);
+  }
+  doEndPath();
+}
+
+void Gfx::opCloseFillStroke(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in closepath/fill/stroke");
+    return;
+  }
+  if (state->isPath()) {
+    state->closePath();
+    out->fill(state);
+    out->stroke(state);
+  }
+  doEndPath();
+}
+
+void Gfx::opEOFillStroke(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in eofill/stroke");
+    return;
+  }
+  if (state->isPath()) {
+    out->eoFill(state);
+    out->stroke(state);
+  }
+  doEndPath();
+}
+
+void Gfx::opCloseEOFillStroke(Object args[], int numArgs) {
+  if (!state->isCurPt()) {
+    //error(getPos(), "No path in closepath/eofill/stroke");
+    return;
+  }
+  if (state->isPath()) {
+    state->closePath();
+    out->eoFill(state);
+    out->stroke(state);
+  }
+  doEndPath();
+}
+
+void Gfx::doEndPath() {
+  if (state->isPath()) {
+    if (clip == clipNormal)
+      out->clip(state);
+    else if (clip == clipEO)
+      out->eoClip(state);
+  }
+  clip = clipNone;
+  state->clearPath();
+}
+
+//------------------------------------------------------------------------
+// path clipping operators
+//------------------------------------------------------------------------
+
+void Gfx::opClip(Object args[], int numArgs) {
+  clip = clipNormal;
+}
+
+void Gfx::opEOClip(Object args[], int numArgs) {
+  clip = clipEO;
+}
+
+//------------------------------------------------------------------------
+// text object operators
+//------------------------------------------------------------------------
+
+void Gfx::opBeginText(Object args[], int numArgs) {
+  state->setTextMat(1, 0, 0, 1, 0, 0);
+  state->textMoveTo(0, 0);
+  out->updateTextMat(state);
+  out->updateTextPos(state);
+  fontChanged = gTrue;
+}
+
+void Gfx::opEndText(Object args[], int numArgs) {
+}
+
+//------------------------------------------------------------------------
+// text state operators
+//------------------------------------------------------------------------
+
+void Gfx::opSetCharSpacing(Object args[], int numArgs) {
+  state->setCharSpace(args[0].getNum());
+  out->updateCharSpace(state);
+}
+
+void Gfx::opSetFont(Object args[], int numArgs) {
+  GfxFont *font;
+
+  if (!(font = lookupFont(args[0].getName())))
+    return;
+  if (printCommands) {
+    printf("  font: '%s' %g\n",
+	   font->getName() ? font->getName()->getCString() : "???",
+	   args[1].getNum());
+  }
+  state->setFont(font, args[1].getNum());
+  fontChanged = gTrue;
+}
+
+void Gfx::opSetTextLeading(Object args[], int numArgs) {
+  state->setLeading(args[0].getNum());
+}
+
+void Gfx::opSetTextRender(Object args[], int numArgs) {
+  state->setRender(args[0].getInt());
+  out->updateRender(state);
+}
+
+void Gfx::opSetTextRise(Object args[], int numArgs) {
+  state->setRise(args[0].getNum());
+  out->updateRise(state);
+}
+
+void Gfx::opSetWordSpacing(Object args[], int numArgs) {
+  state->setWordSpace(args[0].getNum());
+  out->updateWordSpace(state);
+}
+
+void Gfx::opSetHorizScaling(Object args[], int numArgs) {
+  state->setHorizScaling(args[0].getNum());
+  out->updateHorizScaling(state);
+}
+
+//------------------------------------------------------------------------
+// text positioning operators
+//------------------------------------------------------------------------
+
+void Gfx::opTextMove(Object args[], int numArgs) {
+  double tx, ty;
+
+  tx = state->getLineX() + args[0].getNum();
+  ty = state->getLineY() + args[1].getNum();
+  state->textMoveTo(tx, ty);
+  out->updateTextPos(state);
+}
+
+void Gfx::opTextMoveSet(Object args[], int numArgs) {
+  double tx, ty;
+
+  tx = state->getLineX() + args[0].getNum();
+  ty = args[1].getNum();
+  state->setLeading(-ty);
+  ty += state->getLineY();
+  state->textMoveTo(tx, ty);
+  out->updateTextPos(state);
+}
+
+void Gfx::opSetTextMatrix(Object args[], int numArgs) {
+  state->setTextMat(args[0].getNum(), args[1].getNum(),
+		    args[2].getNum(), args[3].getNum(),
+		    args[4].getNum(), args[5].getNum());
+  state->textMoveTo(0, 0);
+  out->updateTextMat(state);
+  out->updateTextPos(state);
+  fontChanged = gTrue;
+}
+
+void Gfx::opTextNextLine(Object args[], int numArgs) {
+  double tx, ty;
+
+  tx = state->getLineX();
+  ty = state->getLineY() - state->getLeading();
+  state->textMoveTo(tx, ty);
+  out->updateTextPos(state);
+}
+
+//------------------------------------------------------------------------
+// text string operators
+//------------------------------------------------------------------------
+
+void Gfx::opShowText(Object args[], int numArgs) {
+  if (!state->getFont()) {
+    error(getPos(), "No font in show");
+    return;
+  }
+  doShowText(args[0].getString());
+}
+
+void Gfx::opMoveShowText(Object args[], int numArgs) {
+  double tx, ty;
+
+  if (!state->getFont()) {
+    error(getPos(), "No font in move/show");
+    return;
+  }
+  tx = state->getLineX();
+  ty = state->getLineY() - state->getLeading();
+  state->textMoveTo(tx, ty);
+  out->updateTextPos(state);
+  doShowText(args[0].getString());
+}
+
+void Gfx::opMoveSetShowText(Object args[], int numArgs) {
+  double tx, ty;
+
+  if (!state->getFont()) {
+    error(getPos(), "No font in move/set/show");
+    return;
+  }
+  state->setWordSpace(args[0].getNum());
+  state->setCharSpace(args[1].getNum());
+  tx = state->getLineX();
+  ty = state->getLineY() - state->getLeading();
+  state->textMoveTo(tx, ty);
+  out->updateWordSpace(state);
+  out->updateCharSpace(state);
+  out->updateTextPos(state);
+  doShowText(args[2].getString());
+}
+
+void Gfx::opShowSpaceText(Object args[], int numArgs) {
+  Array *a;
+  Object obj;
+  int i;
+
+  if (!state->getFont()) {
+    error(getPos(), "No font in show/space");
+    return;
+  }
+  a = args[0].getArray();
+  for (i = 0; i < a->getLength(); ++i) {
+    a->get(i, &obj);
+    if (obj.isNum()) {
+      state->textShift(-obj.getNum() * 0.001 * state->getFontSize());
+      out->updateTextShift(state, obj.getNum());
+    } else if (obj.isString()) {
+      doShowText(obj.getString());
+    } else {
+      error(getPos(), "Element of show/space array must be number or string");
+    }
+    obj.free();
+  }
+}
+
+void Gfx::doShowText(GString *s) {
+  GfxFont *font;
+  GfxFontEncoding16 *enc;
+  Guchar *p;
+  Guchar c8;
+  int c16;
+  GString *s16;
+  int m, n;
+  double dx, dy, width, w, h;
+
+  if (fontChanged) {
+    out->updateFont(state);
+    fontChanged = gFalse;
+  }
+  font = state->getFont();
+
+  //----- 16-bit font
+  if (font->is16Bit()) {
+    enc = font->getEncoding16();
+    if (out->useDrawChar()) {
+      out->beginString(state, s);
+      s16 = NULL;
+    } else {
+      s16 = new GString("  ");
+    }
+    state->textTransformDelta(0, state->getRise(), &dx, &dy);
+    p = (Guchar *)s->getCString();
+    n = s->getLength();
+    while (n > 0) {
+      m = getNextChar16(enc, p, &c16);
+      width = state->getFontSize() * state->getHorizScaling() *
+	      font->getWidth16(c16) +
+	      state->getCharSpace();
+      if (c16 == ' ')
+	width += state->getWordSpace();
+      state->textTransformDelta(width, 0, &w, &h);
+      if (out->useDrawChar()) {
+	out->drawChar16(state, state->getCurX() + dx, state->getCurY() + dy,
+			w, h, c16);
+      } else {
+	s16->setChar(0, (char)(c16 >> 8));
+	s16->setChar(1, (char)c16);
+	out->drawString16(state, s16);
+      }
+      state->textShift(width);
+      n -= m;
+      p += m;
+    }
+    if (out->useDrawChar())
+      out->endString(state);
+    else
+      delete s16;
+
+  //----- 8-bit font
+  } else {
+    if (out->useDrawChar()) {
+      out->beginString(state, s);
+      state->textTransformDelta(0, state->getRise(), &dx, &dy);
+      for (p = (Guchar *)s->getCString(), n = s->getLength(); n; ++p, --n) {
+	c8 = *p;
+	width = state->getFontSize() * state->getHorizScaling() *
+	        font->getWidth(c8) +
+	        state->getCharSpace();
+	if (c8 == ' ')
+	  width += state->getWordSpace();
+	state->textTransformDelta(width, 0, &w, &h);
+	out->drawChar(state, state->getCurX() + dx, state->getCurY() + dy,
+		      w, h, c8);
+	state->textShift(width);
+      }
+      out->endString(state);
+    } else {
+      out->drawString(state, s);
+      width = state->getFontSize() * state->getHorizScaling() *
+	      font->getWidth(s) +
+	      s->getLength() * state->getCharSpace();
+      for (p = (Guchar *)s->getCString(), n = s->getLength(); n; ++p, --n) {
+	if (*p == ' ')
+	  width += state->getWordSpace();
+      }
+      state->textShift(width);
+    }
+  }
+}
+
+int Gfx::getNextChar16(GfxFontEncoding16 *enc, Guchar *p, int *c16) {
+  int n;
+  int code;
+  int a, b, m;
+
+  n = enc->codeLen[*p];
+  if (n == 1) {
+    *c16 = enc->map1[*p];
+  } else {
+    code = (p[0] << 8) + p[1];
+    a = 0;
+    b = enc->map2Len;
+    // invariant: map2[2*a] <= code < map2[2*b]
+    while (b - a > 1) {
+      m = (a + b) / 2;
+      if (enc->map2[2*m] <= code)
+	a = m;
+      else if (enc->map2[2*m] > code)
+	b = m;
+      else
+	break;
+    }
+    *c16 = enc->map2[2*a+1] + (code - enc->map2[2*a]);
+  }
+  return n;
+}
+
+//------------------------------------------------------------------------
+// XObject operators
+//------------------------------------------------------------------------
+
+void Gfx::opXObject(Object args[], int numArgs) {
+  Object obj1, obj2;
+
+  if (!lookupXObject(args[0].getName(), &obj1))
+    return;
+  if (!obj1.isStream("XObject")) {
+    error(getPos(), "XObject '%s' is wrong type", args[0].getName());
+    obj1.free();
+    return;
+  }
+  obj1.streamGetDict()->lookup("Subtype", &obj2);
+  if (obj2.isName("Image"))
+    doImage(obj1.getStream(), gFalse);
+  else if (obj2.isName("Form"))
+    doForm(&obj1);
+  else if (obj2.isName())
+    error(getPos(), "Unknown XObject subtype '%s'", obj2.getName());
+  else
+    error(getPos(), "XObject subtype is missing or wrong type");
+  obj2.free();
+  obj1.free();
+}
+
+void Gfx::doImage(Stream *str, GBool inlineImg) {
+  Dict *dict;
+  Object obj1, obj2;
+  int width, height;
+  int bits;
+  GBool mask;
+  GfxColorSpace *colorSpace;
+  GfxImageColorMap *colorMap;
+  GBool invert;
+
+  // get stream dict
+  dict = str->getDict();
+
+  // get size
+  dict->lookup("Width", &obj1);
+  if (obj1.isNull()) {
+    obj1.free();
+    dict->lookup("W", &obj1);
+  }
+  if (!obj1.isInt())
+    goto err2;
+  width = obj1.getInt();
+  obj1.free();
+  dict->lookup("Height", &obj1);
+  if (obj1.isNull()) {
+    obj1.free();
+    dict->lookup("H", &obj1);
+  }
+  if (!obj1.isInt())
+    goto err2;
+  height = obj1.getInt();
+  obj1.free();
+
+  // image or mask?
+  dict->lookup("ImageMask", &obj1);
+  if (obj1.isNull()) {
+    obj1.free();
+    dict->lookup("IM", &obj1);
+  }
+  mask = gFalse;
+  if (obj1.isBool())
+    mask = obj1.getBool();
+  else if (!obj1.isNull())
+    goto err2;
+  obj1.free();
+
+  // bit depth
+  dict->lookup("BitsPerComponent", &obj1);
+  if (obj1.isNull()) {
+    obj1.free();
+    dict->lookup("BPC", &obj1);
+  }
+  if (!obj1.isInt())
+    goto err2;
+  bits = obj1.getInt();
+  obj1.free();
+
+  // display a mask
+  if (mask) {
+
+    // check for inverted mask
+    if (bits != 1)
+      goto err1;
+    invert = gFalse;
+    dict->lookup("Decode", &obj1);
+    if (obj1.isNull()) {
+      obj1.free();
+      dict->lookup("D", &obj1);
+    }
+    if (obj1.isArray()) {
+      obj1.arrayGet(0, &obj2);
+      if (obj2.isInt() && obj2.getInt() == 1)
+	invert = gTrue;
+      obj2.free();
+    } else if (!obj1.isNull()) {
+      goto err2;
+    }
+    obj1.free();
+
+    // draw it
+    out->drawImageMask(state, str, width, height, invert, inlineImg);
+
+  } else {
+
+    // get color space and color map
+    dict->lookup("ColorSpace", &obj1);
+    if (obj1.isNull()) {
+      obj1.free();
+      dict->lookup("CS", &obj1);
+    }
+    if (obj1.isName()) {
+      lookupColorSpace(obj1.getName(), &obj2);
+      if (!obj2.isNull()) {
+	obj1.free();
+	obj1 = obj2;
+      } else {
+	obj2.free();
+      }
+    }
+    colorSpace = new GfxColorSpace(&obj1);
+    obj1.free();
+    if (!colorSpace->isOk()) {
+      delete colorSpace;
+      goto err1;
+    }
+    dict->lookup("Decode", &obj1);
+    if (obj1.isNull()) {
+      obj1.free();
+      dict->lookup("D", &obj1);
+    }
+    colorMap = new GfxImageColorMap(bits, &obj1, colorSpace);
+    obj1.free();
+    if (!colorMap->isOk()) {
+      delete colorSpace;
+      goto err1;
+    }
+
+    // draw it
+    out->drawImage(state, str, width, height, colorMap, inlineImg);
+    delete colorMap;
+  }
+
+  return;
+
+ err2:
+  obj1.free();
+ err1:
+  error(getPos(), "Bad image parameters");
+}
+
+void Gfx::doForm(Object *str) {
+  Parser *oldParser;
+  GfxResources *resPtr;
+  Dict *dict;
+  Dict *resDict;
+  Object matrixObj, bboxObj;
+  double m[6];
+  Object obj1, obj2;
+  int i;
+
+  // get stream dict
+  dict = str->streamGetDict();
+
+  // check form type
+  dict->lookup("FormType", &obj1);
+  if (!(obj1.isInt() && obj1.getInt() == 1)) {
+    obj1.free();
+    error(getPos(), "Unknown form type");
+    return;
+  }
+  obj1.free();
+
+  // get matrix and bounding box
+  dict->lookup("Matrix", &matrixObj);
+  if (!matrixObj.isArray()) {
+    matrixObj.free();
+    error(getPos(), "Bad form matrix");
+    return;
+  }
+  dict->lookup("BBox", &bboxObj);
+  if (!bboxObj.isArray()) {
+    matrixObj.free();
+    bboxObj.free();
+    error(getPos(), "Bad form bounding box");
+    return;
+  }
+
+  // push new resources on stack
+  dict->lookup("Resources", &obj1);
+  if (obj1.isDict()) {
+    resDict = obj1.getDict();
+    res = new GfxResources(res);
+    res->fonts = NULL;
+    resDict->lookup("Font", &obj2);
+    if (obj2.isDict())
+      res->fonts = new GfxFontDict(obj2.getDict());
+    obj2.free();
+    resDict->lookup("XObject", &res->xObjDict);
+    resDict->lookup("ColorSpace", &res->colorSpaceDict);
+    obj1.free();
+  }
+
+  // save current graphics state
+  out->saveState(state);
+  state = state->save();
+
+  // save current parser
+  oldParser = parser;
+
+  // set form transformation matrix
+  for (i = 0; i < 6; ++i) {
+    matrixObj.arrayGet(i, &obj1);
+    m[i] = obj1.getNum();
+    obj1.free();
+  }
+  state->concatCTM(m[0], m[1], m[2], m[3], m[4], m[5]);
+  out->updateCTM(state, m[0], m[1], m[2], m[3], m[4], m[5]);
+
+  // set form bounding box
+  for (i = 0; i < 4; ++i) {
+    bboxObj.arrayGet(i, &obj1);
+    m[i] = obj1.getNum();
+    obj1.free();
+  }
+  state->moveTo(m[0], m[1]);
+  state->lineTo(m[0]+m[2], m[1]);
+  state->lineTo(m[0]+m[2], m[1]+m[3]);
+  state->lineTo(m[0], m[1]+m[3]);
+  state->closePath();
+  out->clip(state);
+  state->clearPath();
+
+  // draw the form
+  display(str);
+
+  // free matrix and bounding box
+  matrixObj.free();
+  bboxObj.free();
+
+  // restore parser
+  parser = oldParser;
+
+  // restore graphics state
+  state = state->restore();
+  out->restoreState(state);
+
+  // pop resource stack
+  resPtr = res->next;
+  delete res;
+  res = resPtr;
+
+  return;
+}
+
+//------------------------------------------------------------------------
+// in-line image operators
+//------------------------------------------------------------------------
+
+void Gfx::opBeginImage(Object args[], int numArgs) {
+  Stream *str;
+  int c1, c2;
+
+  // build dict/stream
+  str = buildImageStream();
+
+  // display the image
+  if (str) {
+    doImage(str, gTrue);
+  
+    // skip 'EI' tag
+    c1 = str->getBaseStream()->getChar();
+    c2 = str->getBaseStream()->getChar();
+    while (!(c1 == 'E' && c2 == 'I') && c2 != EOF) {
+      c1 = c2;
+      c2 = str->getBaseStream()->getChar();
+    }
+    delete str;
+  }
+}
+
+Stream *Gfx::buildImageStream() {
+  Object dict;
+  Object obj;
+  char *key;
+  Stream *str;
+
+  // build dictionary
+  dict.initDict();
+  parser->getObj(&obj);
+  while (!obj.isCmd("ID") && !obj.isEOF()) {
+    if (!obj.isName()) {
+      error(getPos(), "Inline image dictionary key must be a name object");
+      obj.free();
+      parser->getObj(&obj);
+    } else {
+      key = copyString(obj.getName());
+      obj.free();
+      parser->getObj(&obj);
+      if (obj.isEOF() || obj.isError())
+	break;
+      dict.dictAdd(key, &obj);
+    }
+    parser->getObj(&obj);
+  }
+  if (obj.isEOF())
+    error(getPos(), "End of file in inline image");
+  obj.free();
+
+  // make stream
+  str = new SubStream(parser->getStream(), &dict);
+  str = str->addFilters(&dict);
+
+  return str;
+}
+
+void Gfx::opImageData(Object args[], int numArgs) {
+  error(getPos(), "Internal: got 'ID' operator");
+}
+
+void Gfx::opEndImage(Object args[], int numArgs) {
+  error(getPos(), "Internal: got 'EI' operator");
+}
+
+//------------------------------------------------------------------------
+// type 3 font operators
+//------------------------------------------------------------------------
+
+void Gfx::opSetCharWidth(Object args[], int numArgs) {
+  error(getPos(), "Encountered 'd0' operator in content stream");
+}
+
+void Gfx::opSetCacheDevice(Object args[], int numArgs) {
+  error(getPos(), "Encountered 'd1' operator in content stream");
+}
+
+//------------------------------------------------------------------------
+// compatibility operators
+//------------------------------------------------------------------------
+
+void Gfx::opBeginIgnoreUndef(Object args[], int numArgs) {
+  ++ignoreUndef;
+}
+
+void Gfx::opEndIgnoreUndef(Object args[], int numArgs) {
+  if (ignoreUndef > 0)
+    --ignoreUndef;
+}
+
+//------------------------------------------------------------------------
+// marked content operators
+//------------------------------------------------------------------------
+
+void Gfx::opBeginMarkedContent(Object args[], int numArgs) {
+  if (printCommands) {
+    printf("  marked content: %s ", args[0].getName());
+    if (numArgs == 2)
+      args[2].print(stdout);
+    printf("\n");
+  }
+}
+
+void Gfx::opEndMarkedContent(Object args[], int numArgs) {
+}
+
+void Gfx::opMarkPoint(Object args[], int numArgs) {
+  if (printCommands) {
+    printf("  mark point: %s ", args[0].getName());
+    if (numArgs == 2)
+      args[2].print(stdout);
+    printf("\n");
+  }
+}