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e4fb88eb2d53e196e6095bf544cd240330ddda37
dvdisaster/curve.c
Rogério Brito 555c0daf7d Imported Upstream version 0.79.2
2010-11-06 20:36:40 -02:00

378 lines
11 KiB
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/* dvdisaster: Additional error correction for optical media.
* Copyright (C) 2004-2010 Carsten Gnoerlich.
* Project home page: http://www.dvdisaster.com
* Email: carsten@dvdisaster.com -or- cgnoerlich@fsfe.org
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA,
* or direct your browser at http://www.gnu.org.
*/
#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;
}
}
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