* Massachusetts.
*
* Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005, 2006,
- * 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+ * 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
*
* The following terms apply to Digital Equipment Corporation's copyright
* interest in XBoard:
#include <locale.h>
#endif
-
-// [HGM] bitmaps: put before incuding the bitmaps / pixmaps, to know how many piece types there are.
#include "common.h"
-#include "frontend.h"
#include "backend.h"
-#include "xevalgraph.h"
#include "board.h"
#include "menus.h"
#include "dialogs.h"
+#include "evalgraph.h"
#include "gettext.h"
#include "draw.h"
static cairo_surface_t *pngPieceBitmaps[2][(int)BlackPawn]; // scaled pieces as used
static cairo_surface_t *pngPieceBitmaps2[2][(int)BlackPawn+4]; // scaled pieces in store
static RsvgHandle *svgPieces[2][(int)BlackPawn+4]; // vector pieces in store
-static cairo_surface_t *pngBoardBitmap[2];
+static cairo_surface_t *pngBoardBitmap[2], *pngOriginalBoardBitmap[2];
int useTexture, textureW[2], textureH[2];
#define pieceToSolid(piece) &pieceBitmap[SOLID][(piece) % (int)BlackPawn]
#define White(piece) ((int)(piece) < (int)BlackPawn)
+char svgDir[MSG_SIZ] = SVGDIR;
+
+char *crWhite = "#FFFFB0";
+char *crBlack = "#AD5D3D";
+
struct {
int x1, x2, y1, y2;
} gridSegments[BOARD_RANKS + BOARD_FILES + 2];
-static int dual = 0;
-
void
-SwitchWindow ()
+SwitchWindow (int main)
{
- dual = !dual;
- currBoard = (dual ? &mainOptions[W_BOARD] : &dualOptions[3]);
+ currBoard = (main ? &mainOptions[W_BOARD] : &dualOptions[3]);
csBoardWindow = DRAWABLE(currBoard);
}
int p;
for(p=0; p<=(int)WhiteKing; p++)
pngPieceBitmaps[i][p] = pngPieceBitmaps2[i][p]; // defaults
- if(v == VariantShogi) {
- pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteKing+1];
+ if(v == VariantShogi && BOARD_HEIGHT != 7) { // no exceptions in Tori Shogi
+ pngPieceBitmaps[i][(int)WhiteCannon] = pngPieceBitmaps2[i][(int)WhiteTokin];
pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+2];
- pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+3];
- pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+4];
+ pngPieceBitmaps[i][(int)WhiteGrasshopper] = pngPieceBitmaps2[i][(int)WhiteKing+3];
+ pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteKing+4];
pngPieceBitmaps[i][(int)WhiteQueen] = pngPieceBitmaps2[i][(int)WhiteLance];
+ pngPieceBitmaps[i][(int)WhiteFalcon] = pngPieceBitmaps2[i][(int)WhiteMonarch]; // for Sho Shogi
}
#ifdef GOTHIC
if(v == VariantGothic) {
pngPieceBitmaps[i][(int)WhiteAngel] = pngPieceBitmaps2[i][(int)WhiteFalcon];
pngPieceBitmaps[i][(int)WhiteMarshall] = pngPieceBitmaps2[i][(int)WhiteAlfil];
}
+ if(v == VariantChuChess) {
+ pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteLion];
+ }
+ if(v == VariantChu) {
+ pngPieceBitmaps[i][(int)WhiteNightrider] = pngPieceBitmaps2[i][(int)WhiteKing+1];
+ pngPieceBitmaps[i][(int)WhiteUnicorn] = pngPieceBitmaps2[i][(int)WhiteCat];
+ pngPieceBitmaps[i][(int)WhiteSilver] = pngPieceBitmaps2[i][(int)WhiteSword];
+ pngPieceBitmaps[i][(int)WhiteFalcon] = pngPieceBitmaps2[i][(int)WhiteDagger];
+ }
}
}
InitDrawingSizes (BoardSize boardSize, int flags)
{ // [HGM] resize is functional now, but for board format changes only (nr of ranks, files)
int boardWidth, boardHeight;
- int i;
static int oldWidth, oldHeight;
static VariantClass oldVariant;
- static int oldMono = -1, oldTwoBoards = 0;
- extern Widget formWidget;
+ static int oldTwoBoards = 0, oldNrOfFiles = 0;
+
+ if(!mainOptions[W_BOARD].handle) return;
- if(!formWidget) return;
+ if(boardSize == -2 && gameInfo.variant != oldVariant
+ && oldNrOfFiles && oldNrOfFiles != BOARD_WIDTH) { // called because variant switch changed board format
+ squareSize = ((squareSize + lineGap) * oldNrOfFiles + 0.5*BOARD_WIDTH) / BOARD_WIDTH; // keep total width fixed
+ if(appData.overrideLineGap < 0) lineGap = squareSize < 37 ? 1 : squareSize < 59 ? 2 : squareSize < 116 ? 3 : 4;
+ squareSize -= lineGap;
+ CreatePNGPieces();
+ CreateGrid();
+ }
+ oldNrOfFiles = BOARD_WIDTH;
if(oldTwoBoards && !twoBoards) PopDown(DummyDlg);
oldTwoBoards = twoBoards;
oldWidth = boardWidth; oldHeight = boardHeight;
CreateGrid();
+ CreateAnyPieces(0); // redo texture scaling
/*
* Inhibit shell resizing.
SelectPieces(gameInfo.variant);
- oldMono = -10; // kludge to force recreation of animation masks
oldVariant = gameInfo.variant;
}
CreateAnimVars();
- oldMono = appData.monoMode;
}
void
static void
CreatePNGBoard (char *s, int kind)
{
+ float w, h;
+ static float n[2] = { 1., 1. };
if(!appData.useBitmaps || s == NULL || *s == 0 || *s == '*') { useTexture &= ~(kind+1); return; }
+ textureW[kind] = 0; // prevents bitmap from being used if not succesfully loaded
if(strstr(s, ".png")) {
cairo_surface_t *img = cairo_image_surface_create_from_png (s);
if(img) {
- useTexture |= kind + 1; pngBoardBitmap[kind] = img;
- textureW[kind] = cairo_image_surface_get_width (img);
- textureH[kind] = cairo_image_surface_get_height (img);
+ char c, *p = s, *q;
+ int r, f;
+ if(pngOriginalBoardBitmap[kind]) cairo_surface_destroy(pngOriginalBoardBitmap[kind]);
+ if(n[kind] != 1.) cairo_surface_destroy(pngBoardBitmap[kind]);
+ useTexture |= kind + 1; pngOriginalBoardBitmap[kind] = img;
+ w = textureW[kind] = cairo_image_surface_get_width (img);
+ h = textureH[kind] = cairo_image_surface_get_height (img);
+ n[kind] = 1.;
+ while((q = strchr(p+1, '-'))) p = q; // find last '-'
+ if(strlen(p) < 11 && sscanf(p, "-%dx%d.pn%c", &f, &r, &c) == 3 && c == 'g') {
+ if(f == 0 || r == 0) f = BOARD_WIDTH, r = BOARD_HEIGHT; // 0x0 means 'fits any', so make it fit
+ textureW[kind] = (w*BOARD_WIDTH)/f; // sync cutting locations with square pattern
+ textureH[kind] = (h*BOARD_HEIGHT)/r;
+ n[kind] = r*squareSize/h; // scale to make it fit exactly vertically
+ } else
+ if((p = strstr(s, "xq")) && (p == s || p[-1] == '/')) { // assume full-board image for Xiangqi
+ while(0.8*squareSize*BOARD_WIDTH > n[kind]*w || 0.8*squareSize*BOARD_HEIGHT > n[kind]*h) n[kind]++;
+ } else {
+ while(squareSize > n[kind]*w || squareSize > n[kind]*h) n[kind]++;
+ }
+ if(n[kind] == 1.) pngBoardBitmap[kind] = img; else {
+ // create scaled-up copy of the raw png image when it was too small
+ cairo_surface_t *cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, n[kind]*w, n[kind]*h);
+ cairo_t *cr = cairo_create(cs);
+ pngBoardBitmap[kind] = cs; textureW[kind] *= n[kind]; textureH[kind] *= n[kind];
+// cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
+ cairo_scale(cr, n[kind], n[kind]);
+ cairo_set_source_surface (cr, img, 0, 0);
+ cairo_paint (cr);
+ cairo_destroy (cr);
+ }
}
}
}
char *pngPieceNames[] = // must be in same order as internal piece encoding
-{ "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
- "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "King",
- "GoldKnight", "GoldLance", "GoldPawn", "GoldSilver", NULL
+{ "Pawn", "Knight", "Bishop", "Rook", "Queen", "Advisor", "Elephant", "Archbishop", "Marshall", "Gold", "Commoner",
+ "Canon", "Nightrider", "CrownedBishop", "CrownedRook", "Princess", "Chancellor", "Hawk", "Lance", "Cobra", "Unicorn", "Lion",
+ "GoldPawn", "HSword", "PromoHorse", "PromoDragon", "Leopard", "PromoSword", "Prince", "Phoenix", "Kylin", "PromoRook", "PromoHSword",
+ "Dolphin", "Chancellor", "Unicorn", "Hawk", "Sword", "Princess", "HCrown", "Knight", "Elephant", "PromoBishop", "King",
+ "Claw", "GoldKnight", "GoldLance", "GoldSilver", NULL
};
+char *backupPiece[] = { "King", "Queen", "Lion" }; // pieces that map on other when not kanji
+
RsvgHandle *
-LoadSVG (char *dir, int color, int piece)
+LoadSVG (char *dir, int color, int piece, int retry)
{
char buf[MSG_SIZ];
RsvgHandle *svg=svgPieces[color][piece];
cairo_surface_t *img;
cairo_t *cr;
- snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White", pngPieceNames[piece]);
+ snprintf(buf, MSG_SIZ, "%s/%s%s.svg", dir, color ? "Black" : "White",
+ retry ? backupPiece[piece - WhiteMonarch] : pngPieceNames[piece]);
if(svg || *dir && (svg = rsvg_handle_new_from_file(buf, &svgerror))) {
return svg;
}
+ if(!retry && piece >= WhiteMonarch && piece <= WhiteNothing) // pieces that are only different in kanji sets
+ return LoadSVG(dir, color, piece, 1);
if(svgerror)
g_error_free(svgerror);
return NULL;
g_type_init ();
- if(!svgPieces[color][piece]) { // try to freshly render cached svg pieces first, to supply the source bitmap
- svgPieces[color][piece] = LoadSVG("", color, piece); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
- }
+ svgPieces[color][piece] = LoadSVG("", color, piece, 0); // this fills pngPieceImages if we had cached svg with bitmap of wanted size
if(!pngPieceImages[color][piece]) { // we don't have cached bitmap (implying we did not have cached svg)
if(*appData.pieceDirectory) { // user specified piece directory
snprintf(buf, MSG_SIZ, "%s/%s%s.png", appData.pieceDirectory, color ? "Black" : "White", pngPieceNames[piece]);
img = cairo_image_surface_create_from_png (buf); // try if there are png pieces there
if(cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { // there were not
- svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece); // so try if he has svg there
+ svgPieces[color][piece] = LoadSVG(appData.pieceDirectory, color, piece, 0); // so try if he has svg there
} else pngPieceImages[color][piece] = img;
}
}
if(!pngPieceImages[color][piece]) { // we still did not manage to acquire a piece bitmap
static int warned = 0;
- if(!(svgPieces[color][piece] = LoadSVG(SVGDIR, color, piece)) && !warned) { // try to fall back on installed svg
- char *msg = _("No default pieces installed\nSelect your own -pieceImageDirectory");
+ if(!(svgPieces[color][piece] = LoadSVG(svgDir, color, piece, 0)) && !warned) { // try to fall back on installed svg
+ char *msg = _("No default pieces installed!\nSelect your own using '-pieceImageDirectory'.");
printf("%s\n", msg); // give up
DisplayError(msg, 0);
warned = 1; // prevent error message being repeated for each piece type
}
void
-CreateAnyPieces ()
+CreateAnyPieces (int p)
{ // [HGM] taken out of main
- CreatePNGPieces();
+ if(p) CreatePNGPieces();
CreatePNGBoard(appData.liteBackTextureFile, 1);
CreatePNGBoard(appData.darkBackTextureFile, 0);
}
if(svgPieces[i][p]) rsvg_handle_close(svgPieces[i][p], NULL);
svgPieces[i][p] = NULL;
}
- CreateAnyPieces();
+ CreateAnyPieces(1);
}
// [HGM] seekgraph: some low-level drawing routines (by JC, mostly)
case 0: col = "#000000"; break;
case 1: col = appData.highlightSquareColor; break;
case 2: col = appData.premoveHighlightColor; break;
+ default: col = "#808080"; break; // cannot happen
}
cr = cairo_create(csBoardWindow);
cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
w = cairo_image_surface_get_width (img);
h = cairo_image_surface_get_height (img);
cr = cairo_create(DRAWABLE(opt));
- cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
+// cairo_scale(cr, (float)appData.logoSize/w, appData.logoSize/(2.*h));
+ cairo_scale(cr, (float)opt->max/w, (float)opt->value/h);
cairo_set_source_surface (cr, img, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_fill (cr);
cairo_destroy (cr);
} else { // evenly colored squares
- char *col;
+ char *col = NULL;
switch (color) {
case 0: col = appData.darkSquareColor; break;
case 1: col = appData.lightSquareColor; break;
case 2: col = "#000000"; break;
+ default: col = "#808080"; break; // cannot happen
}
SetPen(cr, 2.0, col, 0);
cairo_rectangle (cr, fac*x, fac*y, squareSize, squareSize);
static void
pngDrawPiece (cairo_surface_t *dest, ChessSquare piece, int square_color, int x, int y)
{
- int kind, p = piece;
+ int kind;
cairo_t *cr;
if ((int)piece < (int) BlackPawn) {
kind = 1;
piece -= BlackPawn;
}
- if(appData.upsideDown && flipView) { p += p < BlackPawn ? BlackPawn : -BlackPawn; }// swap white and black pieces
+ if(appData.upsideDown && flipView) kind = 1 - kind; // swap white and black pieces
BlankSquare(dest, x, y, square_color, piece, 1); // erase previous contents with background
cr = cairo_create (dest);
cairo_set_source_surface (cr, pngPieceBitmaps[kind][piece], x, y);
cairo_destroy (cr);
}
+static char *markerColor[8] = { "#FFFF00", "#FF0000", "#00FF00", "#0000FF", "#00FFFF", "#FF00FF", "#FFFFFF", "#000000" };
+
void
DoDrawDot (cairo_surface_t *cs, int marker, int x, int y, int r)
{
cairo_stroke_preserve(cr);
SetPen(cr, 2, marker == 2 ? "#FFFFFF" : "#000000", 0);
} else {
- SetPen(cr, 2, marker == 2 ? "#FF0000" : "#FFFF00", 0);
+ SetPen(cr, 2, markerColor[marker-1], 0);
}
cairo_fill(cr);
GraphExpose(currBoard, x-r, y-r, 2*r, 2*r);
}
-void
-DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *string, int align)
-{ // basic front-end board-draw function: takes care of everything that can be in square:
- // piece, background, coordinate/count, marker dot
- cairo_t *cr;
-
- if (piece == EmptySquare) {
- BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
- } else {
- pngDrawPiece(csBoardWindow, piece, square_color, x, y);
- }
-
- if(align) { // square carries inscription (coord or piece count)
+static void
+DrawText (char *string, int x, int y, int align)
+{
int xx = x, yy = y;
cairo_text_extents_t te;
+ cairo_t *cr;
cr = cairo_create (csBoardWindow);
cairo_select_font_face (cr, "Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_BOLD);
- cairo_set_font_size (cr, squareSize/4);
+ cairo_set_font_size (cr, align < 0 ? 2*squareSize/3 : squareSize/4);
// calculate where it goes
cairo_text_extents (cr, string, &te);
yy += -te.y_bearing + 3;
} else if (align == 4) {
xx += te.x_bearing + 1, yy += -te.y_bearing + 3;
+ } else if (align < 0) {
+ xx += squareSize/2 - te.width/2, yy += 9*squareSize/16 - te.y_bearing/2;
}
cairo_move_to (cr, xx-1, yy);
+ if(align == -2) cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); else
if(align < 3) cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
else cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_show_text (cr, string);
cairo_destroy (cr);
+}
+
+void
+InscribeKanji (ChessSquare piece, int x, int y)
+{
+ char *p, *q, buf[10];
+ int n;
+ if(piece == EmptySquare) return;
+ if(piece >= BlackPawn) piece = BLACK_TO_WHITE piece;
+ p = appData.inscriptions;
+ n = piece;
+ while(piece > WhitePawn) {
+ if(*p++ == NULLCHAR) {
+ if(n != WhiteKing) return;
+ p = q;
+ break;
+ }
+ q = p - 1;
+ while((*p & 0xC0) == 0x80) p++; // skip UTF-8 continuation bytes
+ piece--;
+ }
+ strncpy(buf, p, 10);
+ for(q=buf; (*++q & 0xC0) == 0x80;);
+ *q = NULLCHAR;
+ DrawText(buf, x, y, n > WhiteLion ? -2 : -1);
+}
+
+void
+DrawOneSquare (int x, int y, ChessSquare piece, int square_color, int marker, char *tString, char *bString, int align)
+{ // basic front-end board-draw function: takes care of everything that can be in square:
+ // piece, background, coordinate/count, marker dot
+
+ if (piece == EmptySquare) {
+ BlankSquare(csBoardWindow, x, y, square_color, piece, 1);
+ } else {
+ pngDrawPiece(csBoardWindow, piece, square_color, x, y);
+ if(appData.inscriptions[0]) InscribeKanji(piece, x, y);
+ }
+
+ if(align) { // square carries inscription (coord or piece count)
+ if(align > 1) DrawText(tString, x, y, align); // top (rank or count)
+ if(bString && *bString) DrawText(bString, x, y, 1); // bottom (always lower right file ID)
}
if(marker) { // print fat marker dot, if requested
void CopyRectangle (AnimNr anr, int srcBuf, int destBuf,
int srcX, int srcY, int width, int height, int destX, int destY)
{
- cairo_t *cr = cairo_create (c_animBufs[anr+destBuf]);
+ cairo_t *cr;
+ c_animBufs[anr+4] = csBoardWindow;
+ cr = cairo_create (c_animBufs[anr+destBuf]);
cairo_set_source_surface (cr, c_animBufs[anr+srcBuf], destX - srcX, destY - srcY);
cairo_rectangle (cr, destX, destY, width, height);
cairo_fill (cr);
cairo_destroy (cr);
- if(c_animBufs[anr+destBuf] == csBoardWindow)
- GraphExpose(currBoard, destX, destY, squareSize, squareSize);
+ if(c_animBufs[anr+destBuf] == csBoardWindow) // suspect that GTK needs this!
+ GraphExpose(currBoard, destX, destY, width, height);
}
void
// if(!dual) DoDrawPolygon(csBoardBackup, arrow, nr);
}
+//-------------------- Eval Graph drawing routines (formerly in xevalgraph.h) --------------------
+
+static void
+ChoosePen(cairo_t *cr, int i)
+{
+ switch(i) {
+ case PEN_BLACK:
+ SetPen(cr, 1.0, "#000000", 0);
+ break;
+ case PEN_DOTTED:
+ SetPen(cr, 1.0, "#A0A0A0", 1);
+ break;
+ case PEN_BLUEDOTTED:
+ SetPen(cr, 1.0, "#0000FF", 1);
+ break;
+ case PEN_BOLDWHITE:
+ SetPen(cr, 3.0, crWhite, 0);
+ break;
+ case PEN_BOLDBLACK:
+ SetPen(cr, 3.0, crBlack, 0);
+ break;
+ case PEN_BACKGD:
+ SetPen(cr, 3.0, "#E0E0F0", 0);
+ break;
+ }
+}
+
+// [HGM] front-end, added as wrapper to avoid use of LineTo and MoveToEx in other routines (so they can be back-end)
+void
+DrawSegment (int x, int y, int *lastX, int *lastY, int penType)
+{
+ static int curX, curY;
+
+ if(penType != PEN_NONE) {
+ cairo_t *cr = cairo_create(DRAWABLE(disp));
+ cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
+ cairo_move_to (cr, curX, curY);
+ cairo_line_to (cr, x,y);
+ ChoosePen(cr, penType);
+ cairo_stroke (cr);
+ cairo_destroy (cr);
+ }
+
+ if(lastX != NULL) { *lastX = curX; *lastY = curY; }
+ curX = x; curY = y;
+}
+
+// front-end wrapper for drawing functions to do rectangles
+void
+DrawRectangle (int left, int top, int right, int bottom, int side, int style)
+{
+ cairo_t *cr;
+ cr = cairo_create (DRAWABLE(disp));
+ cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
+ cairo_rectangle (cr, left, top, right-left, bottom-top);
+ switch(side)
+ {
+ case 0: ChoosePen(cr, PEN_BOLDWHITE); break;
+ case 1: ChoosePen(cr, PEN_BOLDBLACK); break;
+ case 2: ChoosePen(cr, PEN_BACKGD); break;
+ }
+ cairo_fill (cr);
+
+ if(style != FILLED)
+ {
+ cairo_rectangle (cr, left, top, right-left-1, bottom-top-1);
+ ChoosePen(cr, PEN_BLACK);
+ cairo_stroke (cr);
+ }
+
+ cairo_destroy(cr);
+}
+
+// front-end wrapper for putting text in graph
+void
+DrawEvalText (char *buf, int cbBuf, int y)
+{
+ // the magic constants 8 and 5 should really be derived from the font size somehow
+ cairo_text_extents_t extents;
+ cairo_t *cr = cairo_create(DRAWABLE(disp));
+
+ /* GTK-TODO this has to go into the font-selection */
+ cairo_select_font_face (cr, "Sans",
+ CAIRO_FONT_SLANT_NORMAL,
+ CAIRO_FONT_WEIGHT_NORMAL);
+ cairo_set_font_size (cr, 12.0);
+
+
+ cairo_text_extents (cr, buf, &extents);
+
+ cairo_move_to (cr, MarginX - 2 - 8*cbBuf, y+5);
+ cairo_text_path (cr, buf);
+ cairo_set_source_rgb (cr, 0.0, 0.0, 0);
+ cairo_fill_preserve (cr);
+ cairo_set_source_rgb (cr, 0, 1.0, 0);
+ cairo_set_line_width (cr, 0.1);
+ cairo_stroke (cr);
+
+ /* free memory */
+ cairo_destroy (cr);
+}