2 * evalgraph.c - Evaluation graph back-end part
4 * Author: Alessandro Scotti (Dec 2005)
6 * Copyright 2005 Alessandro Scotti
8 * ------------------------------------------------------------------------
10 * GNU XBoard is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or (at
13 * your option) any later version.
15 * GNU XBoard is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see http://www.gnu.org/licenses/. *
23 *------------------------------------------------------------------------
24 ** See the file ChangeLog for a revision history. */
26 // code refactored by HGM to obtain front-end / back-end separation
35 #else /* not STDC_HEADERS */
38 # else /* not HAVE_STRING_H */
40 # endif /* not HAVE_STRING_H */
41 #endif /* not STDC_HEADERS */
46 #include "evalgraph.h"
49 ChessProgramStats_Move * currPvInfo;
63 static void DrawLine( int x1, int y1, int x2, int y2, int penType )
65 DrawSegment( x1, y1, NULL, NULL, PEN_NONE );
66 DrawSegment( x2, y2, NULL, NULL, penType );
70 static void DrawLineEx( int x1, int y1, int x2, int y2, int penType )
73 DrawSegment( x1, y1, &savX, &savY, PEN_NONE );
74 DrawSegment( x2, y2, NULL, NULL, penType );
75 DrawSegment( savX, savY, NULL, NULL, PEN_NONE );
79 static int GetPvScore( int index )
81 int score = currPvInfo[ index ].score;
83 if( index & 1 ) score = -score; /* Flip score for black */
88 char* MakeEvalTitle( char * title)
90 int score = currPvInfo[ currCurrent ].score;
91 int depth = currPvInfo[ currCurrent ].depth;
92 static char buf[MSG_SIZ];
94 if( depth <=0 ) return title;
95 if( currCurrent & 1 ) score = -score; /* Flip score for black */
96 snprintf(buf, MSG_SIZ, "%s {%s%.2f/%-2d %d}", title, score>0 ? "+" : " ", score/100., depth, (currPvInfo[currCurrent].time+50)/100);
103 For a centipawn value, this function returns the height of the corresponding
104 histogram, centered on the reference axis.
106 Note: height can be negative!
108 static int GetValueY( int value )
110 if( value < -range*700 ) value = -range*700;
111 if( value > +range*700 ) value = +range*700;
112 if(value > 100*range) value += appData.zoom * 100 - 100*range; else
113 if(value < -100*range) value -= appData.zoom * 100 - 100*range; else
114 value *= appData.zoom;
115 return (nHeightPB / 2) - (int)(value * (nHeightPB - 2*MarginH) / ((1200. + 200.*appData.zoom)*range));
118 // the brush selection is made part of the DrawLine, by passing a style argument
119 // the wrapper for doing the text output makes this back-end
120 static void DrawAxisSegmentHoriz( int value, Boolean drawValue )
122 int y = GetValueY( range*value*100 );
125 char buf[MSG_SIZ], *b = buf;
127 if( value > 0 ) *b++ = '+';
128 sprintf(b, "%d", range*value);
130 DrawEvalText(buf, strlen(buf), y);
132 // [HGM] counts on DrawEvalText to have select transparent background for dotted line!
133 DrawLine( MarginX, y, MarginX + MarginW, y, PEN_BLACK ); // Y-axis tick marks
134 DrawLine( MarginX + MarginW, y, nWidthPB - MarginW, y, PEN_DOTTED ); // hor grid
137 // The DrawLines again must select their own brush.
138 // the initial brush selection is useless? BkMode needed for dotted line and text
139 static void DrawAxis()
141 int cy = nHeightPB / 2;
143 // SelectObject( hdcPB, GetStockObject(NULL_BRUSH) );
145 // SetBkMode( hdcPB, TRANSPARENT );
147 DrawAxisSegmentHoriz( +5, TRUE );
148 DrawAxisSegmentHoriz( +3, FALSE );
149 DrawAxisSegmentHoriz( +1, FALSE );
150 DrawAxisSegmentHoriz( 0, TRUE );
151 DrawAxisSegmentHoriz( -1, FALSE );
152 DrawAxisSegmentHoriz( -3, FALSE );
153 DrawAxisSegmentHoriz( -5, TRUE );
155 DrawLine( MarginX + MarginW, cy, nWidthPB - MarginW, cy, PEN_BLACK ); // x-axis
156 DrawLine( MarginX + MarginW, MarginH, MarginX + MarginW, nHeightPB - MarginH, PEN_BLACK ); // y-axis
160 static void DrawHistogram( int x, int y, int width, int value, int side )
162 int left, top, right, bottom;
164 if( value > -appData.evalThreshold*range && value < +appData.evalThreshold*range ) return;
167 right = left + width + 1;
170 top = GetValueY( value );
175 bottom = GetValueY( value ) + 1;
179 if( width == MIN_HIST_WIDTH ) {
181 DrawRectangle( left, top, right, bottom, side, FILLED );
184 DrawRectangle( left, top, right, bottom, side, OPEN );
189 static void DrawSeparator( int index, int x )
192 if( index == currCurrent ) {
193 DrawLineEx( x, MarginH, x, nHeightPB - MarginH, PEN_BLUEDOTTED );
195 else if( (index % 20) == 0 ) {
196 DrawLineEx( x, MarginH, x, nHeightPB - MarginH, PEN_DOTTED );
201 // made back-end by replacing MoveToEx and LineTo by DrawSegment
202 /* Actually draw histogram as a diagram, cause there's too much data */
203 static void DrawHistogramAsDiagram( int cy, int paint_width, int hist_count )
208 /* Rescale the graph every few moves (as opposed to every move) */
209 hist_count -= hist_count % 8;
213 step = (double) paint_width / (hist_count + 1);
215 for( i=0; i<2; i++ ) {
216 int index = currFirst;
217 int side = (currCurrent + i + 1) & 1; /* Draw current side last */
218 double x = MarginX + MarginW;
220 if( (index & 1) != side ) {
225 DrawSegment( (int) x, cy, NULL, NULL, PEN_NONE );
229 while( index < currLast ) {
232 DrawSeparator( index, (int) x );
234 /* Extend line up to current point */
235 if( currPvInfo[index].depth > 0 ) {
236 DrawSegment((int) x, GetValueY( GetPvScore(index) ), NULL, NULL, PEN_BOLD + side );
244 // back-end, delete pen selection
245 static void DrawHistogramFull( int cy, int hist_width, int hist_count )
249 // SelectObject( hdcPB, GetStockObject(BLACK_PEN) );
251 for( i=0; i<hist_count; i++ ) {
252 int index = currFirst + i;
253 int x = MarginX + MarginW + index * hist_width;
255 /* Draw a separator every 10 moves */
256 DrawSeparator( index, x );
259 if( currPvInfo[i].depth > 0 ) {
260 DrawHistogram( x, cy, hist_width, GetPvScore(index), index & 1 );
273 static Boolean InitVisualization( VisualizationData * vd )
275 Boolean result = FALSE;
277 vd->cy = nHeightPB / 2;
278 vd->hist_width = MIN_HIST_WIDTH;
279 vd->hist_count = currLast - currFirst;
280 vd->paint_width = nWidthPB - MarginX - 2*MarginW;
282 if( vd->hist_count > 0 ) {
286 vd->hist_width = vd->paint_width / vd->hist_count;
288 if( vd->hist_width > MAX_HIST_WIDTH ) vd->hist_width = MAX_HIST_WIDTH;
290 vd->hist_width -= vd->hist_width % 2;
297 static void DrawHistograms()
299 VisualizationData vd;
301 if( InitVisualization( &vd ) ) {
302 if( vd.hist_width < MIN_HIST_WIDTH ) {
303 DrawHistogramAsDiagram( vd.cy, vd.paint_width, vd.hist_count );
306 DrawHistogramFull( vd.cy, vd.hist_width, vd.hist_count );
312 int GetMoveIndexFromPoint( int x, int y )
315 int start_x = MarginX + MarginW;
316 VisualizationData vd;
318 if( x >= start_x && InitVisualization( &vd ) ) {
319 /* Almost an hack here... we duplicate some of the paint logic */
320 if( vd.hist_width < MIN_HIST_WIDTH ) {
323 vd.hist_count -= vd.hist_count % 8;
327 step = (double) vd.paint_width / (vd.hist_count + 1);
330 result = (int) (0.5 + (double) (x - start_x) / step);
333 result = (x - start_x) / vd.hist_width;
337 if( result >= currLast ) {
344 // init and display part split of so they can be moved to front end
345 void PaintEvalGraph( void )
347 VariantClass v = gameInfo.variant;
348 range = (gameInfo.holdingsWidth && v != VariantSuper && v != VariantGreat && v != VariantSChess) ? 2 : 1; // [HGM] double range in drop games
350 DrawRectangle(0, 0, nWidthPB, nHeightPB, 2, FILLED);