//========================================================================
//
// XOutputDev.h
//
// Copyright 1996 Derek B. Noonburg
//
//========================================================================

#ifndef XOUTPUTDEV_H
#define XOUTPUTDEV_H

#ifdef __GNUC__
#pragma interface
#endif

#include <stddef.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#if HAVE_T1LIB_H
#include <t1lib.h>
#include <t1libx.h>
#endif
#include "config.h"
#include "OutputDev.h"

class GString;
class GfxColor;
class GfxFont;
class GfxSubpath;
class TextPage;
struct RGBColor;
class FontEncoding;
class XOutputFontCache;

//------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------

#define maxRGBCube 8		// max size of RGB color cube

#define numTmpPoints 256	// number of XPoints in temporary array
#define numTmpSubpaths 16	// number of elements in temporary arrays
				//   for fill/clip

//------------------------------------------------------------------------
// Misc types
//------------------------------------------------------------------------

struct BoundingRect {
  short xMin, xMax;		// min/max x values
  short yMin, yMax;		// min/max y values
};

struct RGBColor {
  double r, g, b;
};

//------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------

// Install a private colormap.
extern GBool installCmap;

// Size of RGB color cube.
extern int rgbCubeSize;

#if HAVE_T1LIB_H
// Type of t1lib font rendering to use:
//     "none"   -- don't use t1lib
//     "plain"  -- t1lib, without anti-aliasing
//     "low"    -- t1lib, with low-level anti-aliasing
//     "high"   -- t1lib, with high-level anti-aliasing
extern GString *t1libControl;
#endif

// If any of these are set, xpdf will use t1lib to render those font(s)
// instead of using the X server font(s).
extern GString *t1Courier;
extern GString *t1CourierBold;
extern GString *t1CourierBoldOblique;
extern GString *t1CourierOblique;
extern GString *t1Helvetica;
extern GString *t1HelveticaBold;
extern GString *t1HelveticaBoldOblique;
extern GString *t1HelveticaOblique;
extern GString *t1Symbol;
extern GString *t1TimesBold;
extern GString *t1TimesBoldItalic;
extern GString *t1TimesItalic;
extern GString *t1TimesRoman;
extern GString *t1ZapfDingbats;

// Use the EUC-JP encoding.
extern GBool useEUCJP;

#if JAPANESE_SUPPORT
// X font name pattern to use for Japanese text.
extern GString *japan12Font;
#endif

//------------------------------------------------------------------------
// XOutputFont
//------------------------------------------------------------------------

class XOutputFont {
public:

  XOutputFont(GfxFont *gfxFont, double m11, double m12,
	      double m21, double m22, Display *display,
	      XOutputFontCache *cache);

  virtual ~XOutputFont();

  // Does this font match the ID and transform?
  GBool matches(Ref id1, double m11, double m12, double m21, double m22)
    { return id.num == id1.num && id.gen == id1.gen &&
	     m11 == tm11 && m12 == tm12 && m21 == tm21 && m22 == tm22; }

  // Was font created successfully?
  virtual GBool isOk() = 0;

  // Update <gc> with this font.
  virtual void updateGC(GC gc) = 0;

  // Draw character <c> at <x>,<y>.
  virtual void drawChar(GfxState *state, Pixmap pixmap, GC gc,
			double x, double y, int c) = 0;

  // Does this font use hex char codes?
  GBool isHex() { return hex; }

protected:

  Ref id;			// font ID
  double tm11, tm12,		// original transform matrix
         tm21, tm22;
  Display *display;		// X display
  GBool hex;			// subsetted font with hex char codes
				//   (this flag is used for text output)
};

#if HAVE_T1LIB_H
//------------------------------------------------------------------------
// XOutputT1Font
//------------------------------------------------------------------------

class XOutputT1Font: public XOutputFont {
public:

  XOutputT1Font(GfxFont *gfxFont, GString *pdfBaseFont,
		double m11, double m12, double m21, double m22,
		double size, double ntm11, double ntm12,
		double ntm21, double ntm22,
		Display *display, XOutputFontCache *cache);

  virtual ~XOutputT1Font();

  // Was font created successfully?
  virtual GBool isOk();

  // Update <gc> with this font.
  virtual void updateGC(GC gc);

  // Draw character <c> at <x>,<y>.
  virtual void drawChar(GfxState *state, Pixmap pixmap, GC gc,
			double x, double y, int c);

private:

  float size;			// font size
  int t1ID;			// t1lib font ID
  GBool t1libAA;		// true for anti-aliased fonts
};
#endif

//------------------------------------------------------------------------
// XOutputServerFont
//------------------------------------------------------------------------

class XOutputServerFont: public XOutputFont {
public:

  XOutputServerFont(GfxFont *gfxFont, char *fontNameFmt,
		    FontEncoding *encoding,
		    double m11, double m12, double m21, double m22,
		    double size, double ntm11, double ntm12,
		    double ntm21, double ntm22,
		    Display *display, XOutputFontCache *cache);

  virtual ~XOutputServerFont();

  // Was font created successfully?
  virtual GBool isOk();

  // Update <gc> with this font.
  virtual void updateGC(GC gc);

  // Draw character <c> at <x>,<y>.
  virtual void drawChar(GfxState *state, Pixmap pixmap, GC gc,
			double x, double y, int c);

private:

  XFontStruct *xFont;		// the X font
  Gushort map[256];		// forward map (PDF code -> font code)
  Guchar revMap[256];		// reverese map (font code -> PDF code)
};

//------------------------------------------------------------------------
// XOutputFontCache
//------------------------------------------------------------------------

#if HAVE_T1LIB_H
struct XOutputT1BaseFont {
  int num, gen;
  int t1ID;
  char **enc;
  char *encStr;
};
#endif

class XOutputFontCache {
public:

  // Constructor.
  XOutputFontCache(Display *display);

  // Destructor.
  ~XOutputFontCache();

  // Initialize (or re-initialize) the font cache for a new document.
  void startDoc(int screenNum, Guint depth,
		Colormap colormap);

  // Get a font.  This creates a new font if necessary.
  XOutputFont *getFont(GfxFont *gfxFont, double m11, double m12,
		       double m21, double m22);

#if HAVE_T1LIB_H
  // Get a t1lib font.
  int getT1Font(GfxFont *gfxFont, GString *pdfBaseFont);

  // Use anti-aliased Type 1 fonts?
  GBool getT1libAA() { return t1libAA; }
#endif

private:

  void delFonts();
  void clear();

  Display *display;		// X display pointer

#if HAVE_T1LIB_H
  GBool useT1lib;		// if false, t1lib is not used at all
  GBool t1libAA;		// true for anti-aliased fonts
  GBool t1libAAHigh;		// low or high-level anti-aliasing
  GBool t1Init;			// set when t1lib has been initialized
  XOutputT1Font *		// Type 1 fonts in reverse-LRU order
    t1Fonts[t1FontCacheSize];
  int nT1Fonts;			// number of valid entries in t1Fonts[]
  XOutputT1BaseFont *		// list of t1lib base fonts
    t1BaseFonts;
  int t1BaseFontsSize;		// size of t1BaseFonts array
#endif

  XOutputServerFont *		// X server fonts in reverse-LRU order
    serverFonts[serverFontCacheSize];
  int nServerFonts;		// number of valid entries in serverFonts[]
};

//------------------------------------------------------------------------
// XOutputState
//------------------------------------------------------------------------

struct XOutputState {
  GC strokeGC;
  GC fillGC;
  Region clipRegion;
  XOutputState *next;
};

//------------------------------------------------------------------------
// XOutputDev
//------------------------------------------------------------------------

class XOutputDev: public OutputDev {
public:

  // Constructor.
  XOutputDev(Display *display1, Pixmap pixmap1, Guint depth1,
	     Colormap colormap, unsigned long paperColor);

  // Destructor.
  virtual ~XOutputDev();

  //---- get info about output device

  // Does this device use upside-down coordinates?
  // (Upside-down means (0,0) is the top left corner of the page.)
  virtual GBool upsideDown() { return gTrue; }

  // Does this device use drawChar() or drawString()?
  virtual GBool useDrawChar() { return gTrue; }

  //----- initialization and control

  // Start a page.
  virtual void startPage(int pageNum, GfxState *state);

  // End a page.
  virtual void endPage();

  //----- link borders
  virtual void drawLinkBorder(double x1, double y1, double x2, double y2,
			      double w);

  //----- save/restore graphics state
  virtual void saveState(GfxState *state);
  virtual void restoreState(GfxState *state);

  //----- update graphics state
  virtual void updateAll(GfxState *state);
  virtual void updateCTM(GfxState *state, double m11, double m12,
			 double m21, double m22, double m31, double m32);
  virtual void updateLineDash(GfxState *state);
  virtual void updateFlatness(GfxState *state);
  virtual void updateLineJoin(GfxState *state);
  virtual void updateLineCap(GfxState *state);
  virtual void updateMiterLimit(GfxState *state);
  virtual void updateLineWidth(GfxState *state);
  virtual void updateFillColor(GfxState *state);
  virtual void updateStrokeColor(GfxState *state);

  //----- update text state
  virtual void updateFont(GfxState *state);

  //----- path painting
  virtual void stroke(GfxState *state);
  virtual void fill(GfxState *state);
  virtual void eoFill(GfxState *state);

  //----- path clipping
  virtual void clip(GfxState *state);
  virtual void eoClip(GfxState *state);

  //----- text drawing
  virtual void beginString(GfxState *state, GString *s);
  virtual void endString(GfxState *state);
  virtual void drawChar(GfxState *state, double x, double y,
			double dx, double dy, Guchar c);
  virtual void drawChar16(GfxState *state, double x, double y,
			  double dx, double dy, int c);

  //----- image drawing
  virtual void drawImageMask(GfxState *state, Stream *str,
			     int width, int height, GBool invert,
			     GBool inlineImg);
  virtual void drawImage(GfxState *state, Stream *str, int width,
			 int height, GfxImageColorMap *colorMap,
			 GBool inlineImg);

  //----- special access

  // Called to indicate that a new PDF document has been loaded.
  void startDoc();

  // Find a string.  If <top> is true, starts looking at <xMin>,<yMin>;
  // otherwise starts looking at top of page.  If <bottom> is true,
  // stops looking at <xMax>,<yMax>; otherwise stops looking at bottom
  // of page.  If found, sets the text bounding rectange and returns
  // true; otherwise returns false.
  GBool findText(char *s, GBool top, GBool bottom,
		 int *xMin, int *yMin, int *xMax, int *yMax);

  // Get the text which is inside the specified rectangle.
  GString *getText(int xMin, int yMin, int xMax, int yMax);

protected:

  // Update pixmap ID after a page change.
  void setPixmap(Pixmap pixmap1, int pixmapW1, int pixmapH1)
    { pixmap = pixmap1; pixmapW = pixmapW1; pixmapH = pixmapH1; }

private:

  Display *display;		// X display pointer
  int screenNum;		// X screen number
  Pixmap pixmap;		// pixmap to draw into
  int pixmapW, pixmapH;		// size of pixmap
  Guint depth;			// pixmap depth
  Colormap colormap;		// X colormap
  int flatness;			// line flatness
  GC paperGC;			// GC for background
  GC strokeGC;			// GC with stroke color
  GC fillGC;			// GC with fill color
  Region clipRegion;		// clipping region
  GBool trueColor;		// set if using a TrueColor visual
  int rMul, gMul, bMul;		// RGB multipliers (for TrueColor)
  int rShift, gShift, bShift;	// RGB shifts (for TrueColor)
  Gulong			// color cube
    colors[maxRGBCube * maxRGBCube * maxRGBCube];
  int numColors;		// size of color cube
  XPoint			// temporary points array
    tmpPoints[numTmpPoints];
  int				// temporary arrays for fill/clip
    tmpLengths[numTmpSubpaths];
  BoundingRect
    tmpRects[numTmpSubpaths];
  GfxFont *gfxFont;		// current PDF font
  XOutputFont *font;		// current font
  XOutputFontCache *fontCache;	// font cache
  XOutputState *save;		// stack of saved states
  TextPage *text;		// text from the current page

  void updateLineAttrs(GfxState *state, GBool updateDash);
  void doFill(GfxState *state, int rule);
  void doClip(GfxState *state, int rule);
  int convertPath(GfxState *state, XPoint **points, int *size,
		  int *numPoints, int **lengths, GBool fillHack);
  void convertSubpath(GfxState *state, GfxSubpath *subpath,
		      XPoint **points, int *size, int *n);
  void doCurve(XPoint **points, int *size, int *k,
	       double x0, double y0, double x1, double y1,
	       double x2, double y2, double x3, double y3);
  void addPoint(XPoint **points, int *size, int *k, int x, int y);
  Gulong findColor(GfxColor *color);
  Gulong findColor(RGBColor *x, RGBColor *err);
};

#endif
