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