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, space = nHeightPB/(6 + appData.zoom);
143 DrawAxisSegmentHoriz( +5, TRUE );
144 DrawAxisSegmentHoriz( +3, space >= 20 );
145 DrawAxisSegmentHoriz( +1, space >= 20 && space*appData.zoom >= 40 );
146 DrawAxisSegmentHoriz( 0, TRUE );
147 DrawAxisSegmentHoriz( -1, space >= 20 && space*appData.zoom >= 40 );
148 DrawAxisSegmentHoriz( -3, space >= 20 );
149 DrawAxisSegmentHoriz( -5, TRUE );
151 DrawLine( MarginX + MarginW, cy, nWidthPB - MarginW, cy, PEN_BLACK ); // x-axis
152 DrawLine( MarginX + MarginW, MarginH, MarginX + MarginW, nHeightPB - MarginH, PEN_BLACK ); // y-axis
156 static void DrawHistogram( int x, int y, int width, int value, int side )
158 int left, top, right, bottom;
160 if( value > -appData.evalThreshold*range && value < +appData.evalThreshold*range ) return;
163 right = left + width + 1;
166 top = GetValueY( value );
171 bottom = GetValueY( value ) + 1;
175 if( width == MIN_HIST_WIDTH ) {
177 DrawRectangle( left, top, right, bottom, side, FILLED );
180 DrawRectangle( left, top, right, bottom, side, OPEN );
185 static void DrawSeparator( int index, int x )
188 if( index == currCurrent ) {
189 DrawLineEx( x, MarginH, x, nHeightPB - MarginH, PEN_BLUEDOTTED );
191 else if( (index % 20) == 0 ) {
192 DrawLineEx( x, MarginH, x, nHeightPB - MarginH, PEN_DOTTED );
197 // made back-end by replacing MoveToEx and LineTo by DrawSegment
198 /* Actually draw histogram as a diagram, cause there's too much data */
199 static void DrawHistogramAsDiagram( int cy, int paint_width, int hist_count )
204 /* Rescale the graph every few moves (as opposed to every move) */
205 hist_count -= hist_count % 8;
209 step = (double) paint_width / (hist_count + 1);
211 for( i=0; i<2; i++ ) {
212 int index = currFirst;
213 int side = (currCurrent + i + 1) & 1; /* Draw current side last */
214 double x = MarginX + MarginW;
216 if( (index & 1) != side ) {
221 DrawSegment( (int) x, cy, NULL, NULL, PEN_NONE );
225 while( index < currLast ) {
228 DrawSeparator( index, (int) x );
230 /* Extend line up to current point */
231 if( currPvInfo[index].depth > 0 ) {
232 DrawSegment((int) x, GetValueY( GetPvScore(index) ), NULL, NULL, PEN_BOLD + side );
240 // back-end, delete pen selection
241 static void DrawHistogramFull( int cy, int hist_width, int hist_count )
245 // SelectObject( hdcPB, GetStockObject(BLACK_PEN) );
247 for( i=0; i<hist_count; i++ ) {
248 int index = currFirst + i;
249 int x = MarginX + MarginW + index * hist_width;
251 /* Draw a separator every 10 moves */
252 DrawSeparator( index, x );
255 if( currPvInfo[i].depth > 0 ) {
256 DrawHistogram( x, cy, hist_width, GetPvScore(index), index & 1 );
269 static Boolean InitVisualization( VisualizationData * vd )
271 Boolean result = FALSE;
273 vd->cy = nHeightPB / 2;
274 vd->hist_width = MIN_HIST_WIDTH;
275 vd->hist_count = currLast - currFirst;
276 vd->paint_width = nWidthPB - MarginX - 2*MarginW;
278 if( vd->hist_count > 0 ) {
282 vd->hist_width = vd->paint_width / vd->hist_count;
284 if( vd->hist_width > MAX_HIST_WIDTH ) vd->hist_width = MAX_HIST_WIDTH;
286 vd->hist_width -= vd->hist_width % 2;
293 static void DrawHistograms()
295 VisualizationData vd;
297 if( InitVisualization( &vd ) ) {
298 if( vd.hist_width < MIN_HIST_WIDTH ) {
299 DrawHistogramAsDiagram( vd.cy, vd.paint_width, vd.hist_count );
302 DrawHistogramFull( vd.cy, vd.hist_width, vd.hist_count );
308 int GetMoveIndexFromPoint( int x, int y )
311 int start_x = MarginX + MarginW;
312 VisualizationData vd;
314 if( x >= start_x && InitVisualization( &vd ) ) {
315 /* Almost an hack here... we duplicate some of the paint logic */
316 if( vd.hist_width < MIN_HIST_WIDTH ) {
319 vd.hist_count -= vd.hist_count % 8;
323 step = (double) vd.paint_width / (vd.hist_count + 1);
326 result = (int) (0.5 + (double) (x - start_x) / step);
329 result = (x - start_x) / vd.hist_width;
333 if( result >= currLast ) {
340 // init and display part split of so they can be moved to front end
341 void PaintEvalGraph( void )
343 VariantClass v = gameInfo.variant;
344 range = (gameInfo.holdingsWidth && v != VariantSuper && v != VariantGreat && v != VariantSChess) ? 2 : 1; // [HGM] double range in drop games
346 DrawRectangle(0, 0, nWidthPB, nHeightPB, 2, FILLED);