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/*
* lines.c
* iTunesXPlugIn
*
* Created by guillaum on Tue Aug 14 2001.
* Copyright (c) 2001 __CompanyName__. All rights reserved.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "lines.h"
#include <math.h>
static inline unsigned char
lighten (unsigned char value, unsigned char power)
{
unsigned char i;
for (i = 0; i < power; i++)
value += (255 - value) / 5;
return value;
}
void
goom_lines (GoomData * goomdata, gint16 data[2][512], unsigned int ID,
unsigned int *p, guint32 power)
{
guint32 color1;
guint32 color2;
guint32 resolx = goomdata->resolx;
guint32 resoly = goomdata->resoly;
unsigned char *color = 1 + (unsigned char *) &color1;
switch (ID) {
case 0: /* Horizontal stereo lines */
{
color1 = 0x0000AA00;
color2 = 0x00AA0000;
break;
}
case 1: /* Stereo circles */
{
color1 = 0x00AA33DD;
color2 = 0x00AA33DD;
break;
}
}
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
color = 1 + (unsigned char *) &color2;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
switch (ID) {
case 0: /* Horizontal stereo lines */
{
unsigned int i;
for (i = 0; i < 512; i++) {
guint32 plot;
plot = i * resolx / 512 + (resoly / 4 + data[0][i] / 1600) * resolx;
p[plot] = color1;
p[plot + 1] = color1;
plot = i * resolx / 512 + (resoly * 3 / 4 - data[1][i] / 1600) * resolx;
p[plot] = color2;
p[plot + 1] = color2;
}
break;
}
case 1: /* Stereo circles */
{
float z;
unsigned int monX = resolx / 2;
float monY = resoly / 4;
float monY2 = resoly / 2;
for (z = 0; z < 6.2832f; z += 1.0f / monY) {
/* float offset1 = 128+data[1][(unsigned int)(z*81.33f)])/200000; */
p[monX + (unsigned int) ((monY + ((float) resoly) * (128 +
data[1][(unsigned int) (z * 81.33f)]) / 200000) *
cos (z) + resolx * (unsigned int) (monY2 + (monY +
((float) resoly) * (128 +
data[1][(unsigned int) (z * 81.33f)]) / 400000) *
sin (z)))] = color1;
p[monX + (unsigned int) ((monY - ((float) resoly) * (128 +
data[0][(unsigned int) (z * 81.33f)]) / 200000) *
cos (z) + resolx * (unsigned int) (monY2 + (monY -
((float) resoly) * (128 +
data[0][(unsigned int) (z * 81.33f)]) / 400000) *
sin (z)))] = color2;
}
break;
}
}
}
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