File: curve.c

package info (click to toggle)
dvdisaster 0.79.5-10
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 42,960 kB
  • sloc: ansic: 33,411; sh: 4,898; makefile: 138
file content (378 lines) | stat: -rw-r--r-- 10,773 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
/*  dvdisaster: Additional error correction for optical media.
 *  Copyright (C) 2004-2015 Carsten Gnoerlich.
 *
 *  Email: carsten@dvdisaster.org  -or-  cgnoerlich@fsfe.org
 *  Project homepage: http://www.dvdisaster.org
 *
 *  This file is part of dvdisaster.
 *
 *  dvdisaster is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  dvdisaster is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with dvdisaster. If not, see <http://www.gnu.org/licenses/>.
 */

#include "dvdisaster.h"

/***
 *** Constructors and destructors
 ***/

/*
 * Initialize the curve
 */

Curve* CreateCurve(GtkWidget *widget, char *left_label, char *left_format, int n_values, int bottom_format)
{  Curve *curve = g_malloc0(sizeof(Curve));

   curve->widget     = widget;
   curve->layout     = gtk_widget_create_pango_layout(widget, NULL);
   curve->leftLabel  = g_strdup(left_label); 
   curve->leftFormat = g_strdup(left_format);
   curve->bottomFormat = bottom_format;   

   curve->fvalue       = g_malloc0(sizeof(gdouble)*(n_values+1));
   curve->ivalue       = g_malloc0(sizeof(gint)*(n_values+1));
   curve->lvalue       = g_malloc0(sizeof(gint)*(n_values+1));
   curve->lastValueIdx = n_values;

   curve->maxX      = 1;
   curve->maxY      = 1;
   curve->logMaxY   = 1;

   if(bottom_format != CURVE_PERCENT)
     curve->margin = 2;

   return curve;
} 

/*
 * Get rid of it
 */

void FreeCurve(Curve *curve)
{
   g_object_unref(curve->layout);
   g_free(curve->leftLabel);
   if(curve->leftLogLabel)
      g_free(curve->leftLogLabel);
   g_free(curve->leftFormat);
   g_free(curve->fvalue);
   g_free(curve->ivalue);
   g_free(curve->lvalue);
   g_free(curve);
}

/*
 * Reset the values
 */

void ZeroCurve(Curve *curve)
{  int i;

   if(curve)
     for(i=0; i<=curve->lastValueIdx; i++)
     {  curve->fvalue[i] = -1.0;
        curve->ivalue[i] = 0;
        curve->lvalue[i] = 0;
     }
}

/***
 *** Auxiliary functions
 ***/

/*
 * Calculate pixel coords from curve values
 */

int CurveX(Curve *curve, gdouble x)
{  gdouble width = (curve->rightX - curve->leftX - curve->margin);

   return 1 + curve->leftX + ((gdouble)x * width) / 1000.0;
}

int CurveLX(Curve *curve, gdouble x)
{  gdouble width = (curve->rightX - curve->leftX - curve->margin);

   return 1 + curve->leftX + (x * width) / (gdouble)curve->maxX;
}

int CurveY(Curve *curve, gdouble y)
{  gdouble hfact;

   hfact =   (gdouble)(curve->bottomY - curve->topY) 
           / (gdouble)curve->maxY;

   return curve->bottomY - y * hfact;
}

int CurveLogY(Curve *curve, gdouble y) /* not really a log */
{  gdouble hfact;

   if(y<1) return curve->bottomLY;

   hfact = (gdouble)(curve->bottomLY - curve->topLY);
 
   if(y==1) return curve->bottomLY - ((log(2)/log(curve->logMaxY)) * hfact)/2;
   return curve->bottomLY - (log(y)/log(curve->logMaxY)) * hfact;
}

/***
 *** Calculate the curve geometry
 ***/

void UpdateCurveGeometry(Curve *curve, char *largest_left_label, int right_padding)
{  GtkAllocation *a = &curve->widget->allocation;
   int w,h; 

   /* Top and bottom margins */

   SetText(curve->layout, curve->leftLabel, &w, &h);
   curve->topY = h + 10;

   SetText(curve->layout, "0123456789", &w, &h);
   curve->bottomY = a->height - h - 10;

   /* Left and right margins */

   SetText(curve->layout, largest_left_label, &w, &h);
   curve->leftX   = 5 + 6 + 3 + w;
   curve->rightX  = a->width - right_padding;

   /* Add space for the lograithmic curve */

   if(curve->enable & DRAW_LCURVE)
   {  int height = curve->bottomY - curve->topY;

      curve->bottomLY = curve->bottomY;
      curve->bottomY -= height/4;
      curve->topLY = curve->bottomY + h + 15; 
   }
}

/***
 *** Redraw the coordinate axes
 ***/

void RedrawAxes(Curve *curve)
{  GdkDrawable *d = curve->widget->window;
   int i,w,h,x,y; 
   int yg=0;
   int step;
   int bottom_y;

   /* Draw and label the left coordinate axis */

   gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);

   gdk_draw_line(d, Closure->drawGC,
		 curve->leftX, curve->topY, curve->leftX, curve->bottomY);

   if(curve->enable & DRAW_LCURVE)
   {  gdk_draw_line(d, Closure->drawGC,
		    curve->leftX, curve->topLY, curve->leftX, curve->bottomLY);
   }

   gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->curveColor);
   SetText(curve->layout, curve->leftLabel, &w, &h);
   x = curve->leftX - w/2;
   if(x < 5) x = 5;
   gdk_draw_layout(d, Closure->drawGC, 
		   x, curve->topY - h - 5, curve->layout);


   /* Draw and label the grid lines for the log curve */

   if(curve->enable & DRAW_LCURVE)
   {  int val;
      char buf[16];

      gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->logColor);
      SetText(curve->layout, curve->leftLogLabel, &w, &h);

      x = curve->leftX - w/2;
      if(x < 5) x = 5;
      gdk_draw_layout(d, Closure->drawGC, 
		      x, curve->topLY - h - 5, curve->layout);

      
      for(val=400; val>3; val/=2)
      {  y = CurveLogY(curve, val);
	 sprintf(buf,"%d",val);
	 SetText(curve->layout, buf, &w, &h);
	 gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->logColor);
	 gdk_draw_layout(d, Closure->drawGC, curve->leftX-9-w, y-h/2, curve->layout);
	 gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);
	 gdk_draw_line(d, Closure->drawGC, curve->leftX-6, y, curve->leftX, y);
	 gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->grid);
	 gdk_draw_line(d, Closure->drawGC, curve->leftX, y, curve->rightX, y);

	 val /=2;
	 y = CurveLogY(curve, val);
	 gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);
	 gdk_draw_line(d, Closure->drawGC, curve->leftX-3, y, curve->leftX, y);

	 if(curve->bottomLY-curve->topLY > 8*h)
	 {  sprintf(buf,"%d",val);
	    SetText(curve->layout, buf, &w, &h);
	    gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->logColor);
	    gdk_draw_layout(d, Closure->drawGC, curve->leftX-9-w, y-h/2, curve->layout);
	 }
      }
   }

   /* Draw and label the grid lines for the normal curve */

   if(curve->maxY < 20) step = 4;
   else step = 10;

   for(i=0; i<=curve->maxY; i+=step)
   {  char buf[4];
   
      g_snprintf(buf, 4, curve->leftFormat, i);
      SetText(curve->layout, buf, &w, &h);

      y = yg = CurveY(curve, i);
      gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->curveColor);
      gdk_draw_layout(d, Closure->drawGC, curve->leftX-9-w, y-h/2, curve->layout);
      gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);
      gdk_draw_line(d, Closure->drawGC, curve->leftX-6, y, curve->leftX, y);

      gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->grid);
      gdk_draw_line(d, Closure->drawGC, curve->leftX, y, curve->rightX, y);

      gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);
      y = CurveY(curve, i+step/2);
      if(y >= curve->topY)
        gdk_draw_line(d, Closure->drawGC, curve->leftX-3, y, curve->leftX, y);
   }


   /* Draw the right coordinate axis */

   gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);

   gdk_draw_line(d, Closure->drawGC,
		 curve->rightX, curve->topY, curve->rightX, curve->bottomY);

   if(curve->enable & DRAW_LCURVE)
      gdk_draw_line(d, Closure->drawGC,
		    curve->rightX, curve->topLY, curve->rightX, curve->bottomLY);

   /* Draw and label the bottom coordinate axis */

   gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);

   gdk_draw_line(d, Closure->drawGC,
		 curve->leftX, curve->bottomY, curve->rightX, curve->bottomY);

   if(curve->enable & DRAW_LCURVE)
   {  gdk_draw_line(d, Closure->drawGC,
		    curve->leftX, curve->bottomLY, curve->rightX, curve->bottomLY);
      bottom_y = curve->bottomLY;
   }
   else bottom_y = curve->bottomY;

   if(curve->maxX <= 100) step = 20;           /* <100M */
   else if(curve->maxX < 1000)  step = 100;    /* 100M ... 1000M */
   else if(curve->maxX < 8000)  step = 1024;   /* 1G .. 8G */
   else if(curve->maxX < 15000) step = 2560;   /* 8G .. 15G */
   else if(curve->maxX < 25000) step = 5120;   /* 15G .. 25G */
   else step = 10240;

   for(i=0; i<=curve->maxX; i+=step)
   {  char buf[10];
   
      switch(curve->bottomFormat)
      {  case CURVE_PERCENT:
 	   g_snprintf(buf, 10, "%d%%", i);
	   break;

         case CURVE_MEGABYTES:
	   if(step <= 100)
	        g_snprintf(buf, 10, "%dM",i);
	   else g_snprintf(buf, 10, "%3.1fG",(gdouble)i/1024.0);
	   break;
      }
      SetText(curve->layout, buf, &w, &h);

      x = CurveLX(curve,i)-1;
      gdk_draw_line(d, Closure->drawGC, x, bottom_y+6, x, bottom_y);
      gdk_draw_layout(d, Closure->drawGC, x-w/2, bottom_y+8, curve->layout);

      if(i && x < curve->rightX)
      {  gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->grid);
         gdk_draw_line(d, Closure->drawGC, x, curve->bottomY-1, x, yg);

	 if(curve->enable & DRAW_LCURVE)
	    gdk_draw_line(d, Closure->drawGC, x, curve->bottomLY-1, x, curve->topLY);
      }

      gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);
      x = CurveLX(curve,i+step/2)-1;
      if(x < curve->rightX)
        gdk_draw_line(d, Closure->drawGC, x, bottom_y+3, x, bottom_y);
   }
}

/*
 * Redraw the curve
 */

void RedrawCurve(Curve *curve, int last)
{  int i,x0,x1,fy0,fy1;

   x0  = CurveX(curve, 0);
   fy0 = CurveY(curve, curve->fvalue[0]);

   gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->curveColor);

   /* Draw the curve */

   for(i=1; i<=last; i++)
   {  x1  = CurveX(curve, i);

      if(curve->enable & DRAW_ICURVE)
      {  int iy  = CurveY(curve, curve->ivalue[i]);

	 if(curve->ivalue[i] > 0)
	 {  gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->barColor);
	    gdk_draw_rectangle(curve->widget->window,
			       Closure->drawGC, TRUE,
			       x0, iy, x0==x1 ? 1 : x1-x0, curve->bottomY-iy);
	 }
      }

      if(curve->enable & DRAW_LCURVE)
      {  int iy  = CurveLogY(curve, curve->lvalue[i]);

	 if(curve->lvalue[i] > 0)
	 {  gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->logColor);
	    gdk_draw_rectangle(curve->widget->window,
			       Closure->drawGC, TRUE,
			       x0, iy, x0==x1 ? 1 : x1-x0, curve->bottomLY-iy);
	 }
      }

      if(curve->enable & DRAW_FCURVE && curve->fvalue[i] >= 0)
      {  fy1 = CurveY(curve, curve->fvalue[i]);

	 if(x0 < x1)
	 {  gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->curveColor);
	    gdk_draw_line(curve->widget->window, Closure->drawGC, x0, fy0, x1, fy1);
	    fy0 = fy1;
	 }
      }

      x0 = x1;
   }
}