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/* utils.c
* Functions useful across the different modules of
* drawing and non-drawing code.
*
* for Denemo, a gtk+ frontend to GNU Lilypond
* (c) 1999, 2000, 2001 Matthew Hiller
*/
#include <stdio.h>
#include <gtk/gtk.h>
#include "accwidths.h"
#include "datastructures.h"
#include "notewidths.h"
#include "utils.h"
void
drawbitmapinverse (GdkPixmap * pixmap, GdkGC * gc, GdkBitmap * mask, gint x,
gint y, gint width, gint height)
{
gdk_gc_set_clip_mask (gc, mask);
gdk_gc_set_clip_origin (gc, x, y);
gdk_draw_rectangle (pixmap, gc, TRUE, x, y, width, height);
gdk_gc_set_clip_mask (gc, NULL); /* Removes clip mask */
}
void
set_tuplefied_numticks (mudelaobject * theobj, gint numerator,
gint denominator)
{
theobj->durinticks = theobj->basic_durinticks * numerator / denominator;
/* Though WHOLENUMTICKS is chosen strategically so that in common
* cases, this division works out evenly, things should also work
* out properly if it doesn't; i.e., durinticks_untupletized is
* rounded down */
}
void
set_grace_numticks (mudelaobject * theobj, gint multiplier)
{
theobj->durinticks = theobj->basic_durinticks / multiplier;
}
void
set_basic_numticks (mudelaobject * theobj)
{
gint power;
gint withoutdots;
gint addperdot, i;
switch (theobj->type)
{
case CHORD:
power = 1 << theobj->u.chordval.baseduration;
withoutdots = WHOLE_NUMTICKS / power;
addperdot = withoutdots / 2;
theobj->basic_durinticks = withoutdots;
for (i = 0; i < theobj->u.chordval.numdots; addperdot /= 2, i++)
theobj->basic_durinticks += addperdot;
break;
default:
theobj->basic_durinticks = 0;
theobj->durinticks = 0;
/* There's no reason not to set that as well */
break;
}
}
/* Returns the amount of space to be left after a note or rest, only
* taking the width of the measure into consideration */
gint
space_after (gint numticks, gint wholenotewidth)
{
return MAX (numticks * wholenotewidth / WHOLE_NUMTICKS, 0);
}
#define EXTRAWIDTH 5
/* Sets the minimum space that needs to be allocated for drawing a mudela
* object */
void
setpixelmin (mudelaobject * theobj)
{
gint i, baseduration, headtype;
chord chordval;
GList *tnode;
note *thetone;
/* And these static declaration are copied right out of drawnotes.c
* and drawaccidentals.c */
switch (theobj->type)
{
case CHORD:
chordval = theobj->u.chordval;
baseduration = chordval.baseduration;
headtype = MIN (baseduration, 2);
if (chordval.tones)
{
/* if (theobj->isstart_beamgroup && theobj->isend_beamgroup &&
chordval.is_stemup)
theobj->minpixelsalloted = headwidths[headtype] + STEM_WIDTH;
else
theobj->minpixelsalloted = headwidths[headtype]; */
/* We can get away with that because the stems are narrower
* than even the narrowest notes; upstemmed notes are
* the unusual case here */
/* The above code will allow extra space for the stem of
* stemup notes. It's commented out 'cause we no longer want
* that behavior */
theobj->minpixelsalloted = headwidths[headtype];
}
else /* a rest */
theobj->minpixelsalloted = restwidths[baseduration];
/* 12 pixels for the first dot, 6 for each dot thereafter */
if (chordval.numdots)
theobj->minpixelsalloted += 6;
for (i = 0; i < chordval.numdots; i++)
theobj->minpixelsalloted += 6;
theobj->space_before = 0;
if (chordval.hasanacc)
for (tnode = chordval.tones; tnode; tnode = tnode->next)
{
thetone = tnode->data;
if (thetone->showaccidental)
theobj->space_before =
MAX (theobj->space_before, thetone->position_of_accidental);
}
if (chordval.is_reversealigned)
if (chordval.is_stemup)
theobj->minpixelsalloted += headwidths[headtype];
else if (!chordval.hasanacc)
/* Accidental positioning already accounts for the extra leading
space that we need for reverse-aligned noteheads, provided
the chord has an accidental in it somewhere. We only have to
remark upon noteheads to the left of the stem if there weren't
any accidentals to position. */
theobj->space_before += headwidths[headtype];
theobj->minpixelsalloted += EXTRAWIDTH;
break;
case TUPOPEN:
case TUPCLOSE:
/* The real way do this will be with a gdk_string_width. Until
* then, though: */
theobj->minpixelsalloted = 40;
theobj->space_before = 0;
break;
case CLEF:
theobj->minpixelsalloted = 35;
theobj->space_before = 0;
break;
case KEYSIG:
theobj->space_before = 0;
break;
case TIMESIG:
theobj->minpixelsalloted = 40;
theobj->space_before = 0;
break;
case STEMDIRECTIVE:
/* The real way do this will be with a gdk_string_width. Until
* then, though: */
theobj->minpixelsalloted = 40;
theobj->space_before = 0;
break;
case LILYDIRECTIVE:
theobj->minpixelsalloted = 40;
theobj->space_before = 0;
break;
case DYNAMIC:
theobj->minpixelsalloted = 40;
theobj->space_before = 0;
break;
case GRACE_START:
case GRACE_END:
theobj->minpixelsalloted = 40;
theobj->space_before = 0;
break;
default:
break;
}
}
/* Height of a tone based on its mid_c_offset and the clef that it's in */
gint calculateheight (gint mid_c_offset, gint dclef)
{
switch (dclef)
{
case TREBLE:
return 5 * LINE_SPACE - HALF_LINE_SPACE * mid_c_offset;
break; /* Probably gratuitous */
case ALTO:
return 2 * LINE_SPACE - HALF_LINE_SPACE * mid_c_offset;
break;
case G_8:
return LINE_SPACE - HALF_LINE_SPACE * (mid_c_offset - 1);
break;
case BASS:
return -LINE_SPACE - HALF_LINE_SPACE * mid_c_offset;
break;
case TENOR:
return LINE_SPACE - HALF_LINE_SPACE * mid_c_offset;
break;
case SOPRANO:
return LINE_SPACE - HALF_LINE_SPACE * (mid_c_offset - 6);
break;
}
return (0);
}
gint offsettonumber (gint n)
{
if (n >= 0)
return n % 7;
else
return (7 - (-n % 7)) % 7;
/* Not all C implementations conform to the more recent standard on how %
should operate on negative operands. */
}
gchar mid_c_offsettoname (gint mid_c_offset)
{
int otn = offsettonumber (mid_c_offset);
return ((otn + 2) % 7) + 'a';
}
gint mid_c_offsettooctave (gint mid_c_offset)
{
if (mid_c_offset < 0)
return -((-mid_c_offset + 6) / 7) + 1;
else
return (mid_c_offset / 7) + 1;
}
void
freeit (gpointer data, gpointer user_data)
{
g_free (data);
}
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